JP2017093249A - Control method and control system for power system including photovoltaic power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control method and control system for a power system that are capable of maximally using power generation capability of a photovoltaic power generation device all the time, the photovoltaic power generation device being connected to the power system, by eliminating output suppression for the photovoltaic power generation device while suppressing a phenomenon of "demand excess caused by concentration of peak power generation."SOLUTION: A control method for a power system, on a prediction day, creates operation plans for the next day and the next day but one of a non-renewable energy power generation device 9b by using prediction demand amounts per time for the next day and the next day but one, an actual discharge amount of the next day and a prediction discharge amount per time for the next day but one that are calculated from actual power generation on the prediction day of a photovoltaic power generation device 4, and a prediction power generation amount per time on the next day and the next day but one of photovoltaic power generation devices 5, 6. The control method, during execution of the operation plan for the next day, uses an actual discharge amount calculated on the basis of actual power storage of a power storage battery 3 added to the photovoltaic power generation device 4 to make the added power storage battery 3 discharge electricity.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a control method and control system for a power system including a solar power generation device (hereinafter also referred to as a solar power plant or a PV power generation device), and more specifically, a large number of solar power generation devices are connected to the power system. By suppressing the phenomenon of “excess demand due to concentration of peak power generation” that occurs in the case of The present invention relates to a control method and a control system for a power system that can eliminate the output suppression of a power generation device and can always use the power generation capacity to the maximum.

  In this specification, “electric power system” means a system that delivers power generated by various power generation devices (power plants) to consumers via transmission lines, substations, distribution lines, service lines, etc. It includes the entire equipment (device group) that performs power transmission, transformation, and distribution. “Power system control” refers to power generators (power stations) and power transmission / distribution equipment installed in the power system so that the voltage and frequency supplied to consumers are always maintained within a predetermined range. This means that the equipment (device group) is controlled.

  In recent years, development of power generation technology using renewable energy has been promoted in various fields from the viewpoint that rapid increase of carbon dioxide in the atmosphere has caused global warming and abnormal weather. For this reason, various power generation technologies using sunlight, wind power, geothermal heat, etc. have been developed and put into practical use. One of them, photovoltaic power generation, is a technology that directly converts solar energy irradiated to the solar cell panel into electrical energy using the photovoltaic effect of the solar cell panel. In recent years, it has become widespread in schools, factories, general households, etc. because it is more cost-effective than other power generation technologies using renewable energy.

  Incidentally, one characteristic of solar power generation is that the amount of power generation per day varies greatly depending on the position of the sun. The amount of power generation is maximized when the sun goes to the south, that is, when it is in the middle of the south. On a clear day, the amount of power generated for 5 hours before and after the south-central time reaches 60% of the total amount of power generated per day. In addition, the amount of power generation is zero from sunset to sunrise. In this way, in solar power generation, the amount of power generation greatly fluctuates in one day, from zero during the absence of the sun to the maximum value during the south-south period. When a large amount of power flows into the power grid, the peak power generation amount of each solar power generation device is superimposed and the total power supplied to the power grid (total supply volume) Phenomena such as exceeding not only the quantity but also the peak demand is likely to occur (see FIG. 1).

  In general, a control system that controls an electric power system uses an output adjustment function of an internal combustion power generator provided in the electric power system, and calculates the power supply amount (power generation amount) from the various power generators to the electric power system at that time. It is adjusted to the amount. However, when the power supply amount to the power system greatly exceeds the demand amount at that time, and the power supply amount cannot be adjusted even using the output adjustment function of the internal combustion power generator, it is installed in the power system. “Output suppression” is frequently performed on the solar power generation apparatus. Thus, if “output suppression” occurs frequently, the power generation capability of the solar power generation device is not fully exhibited. Therefore, the control system performs “pumping operation” with a pumped-type power generation facility provided in the electric power system, or transfers surplus power to another electric power supplier, thereby “output suppression” for the solar power generation device. This prevents the frequent occurrence of electricity and keeps the balance between electricity supply and demand. However, even in such a case, it is difficult to maintain the power generation capability of the solar power generation device at a high level. For this reason, even though solar power generation is a representative of renewable energy-based power generation technology, the current situation is that the power generation capacity cannot be fully utilized.

  Therefore, in order to make maximum use of the power generation capacity of the solar power generation apparatus installed in the power system, a technique using a power storage device (secondary battery) has been proposed in recent years.

  For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-90665), a plurality of renewable energy generators and a plurality of thermal power / hydraulic power generators are connected to an electric power system. A “power system operation control system” that controls and controls a plurality of renewable energy generators by a renewable energy power generation control system is disclosed. In this power system operation control system, the central system generates an automatic frequency control signal for eliminating the power supply / demand imbalance of the power system to control the thermal power / hydraulic power generator. The renewable energy power generation control system uses the power fluctuation of the renewable energy generator due to a change in weather conditions and the power capacity that can be borne by the thermal and hydraulic power generators, and the renewable energy that can be connected to an electric power system. An amount of power that can be connected, which is the amount of power generated by the generator, is obtained, and an individual power generation command for setting the total amount of power generated by the renewable energy generator to be within the amount of possible connection is given to the renewable energy generator, Basic information related to the time required to determine the system capacity is obtained in cooperation with the central system, and the system capacity that changes over time is determined. The renewable energy generator can be equipped with a storage battery.

  In the power system operation control system of Patent Document 1 having the above-described configuration, the object of stably operating the power system can be achieved while maximizing the use of the renewable energy generator (summary, claim 1). , Paragraphs 0027-0038 and FIGS. 1-2.

  Patent Document 2 (Japanese Patent Laid-Open No. 2013-169089) discloses a “power system operation method” including a plurality of storage battery devices and a plurality of generators. The operation method of this electric power system calculates | requires the electric energy by the storage battery which can supply electric power in the scheduled time slot | zone of a scheduled date, performs the economic load distribution calculation of the electric power system including the electric energy by this storage battery, and the said storage battery defined The power supply by the storage battery is executed in the scheduled time zone on the scheduled date.

  The power system operation method of Patent Document 2 having the above-described configuration provides a power system operation method that draws out the capacity of the storage battery and uses the storage battery evenly while considering the operation and cost of the storage battery. (See summary, claim 1, paragraphs 0027-0038, FIGS. 1-2).

  Patent Document 3 (Japanese Patent No. 4192131) discloses a “power generation planning method”. This power generation planning method includes a control of a secondary battery that is connected to a power system that supplies power to the consumer on the consumer side that uses power and performs charging and discharging for the consumer. A method for creating a power generation plan for power to be supplied to the power system, estimating total demand power by all consumers receiving power supply from the power system, and fixed power to be supplied to the power system Fluctuations that can be generated within the constraints satisfying predetermined economic conditions by calculating the fixed power generated by the fixed power generator that generates power and the variable power generator that generates the fluctuating power supplied to the power system Calculating power, calculating the total shared power shared by the secondary battery by subtracting the sum of the fixed power and the variable power from the total demand power, and each of the secondary batteries. Based on the current charge amount and the operation schedule, calculating the individual shared power shared by each of the secondary batteries out of the total shared power, and based on the individual shared power, Determining a new operation schedule or charge / discharge amount, and controlling each of the secondary batteries based on the determined new operation schedule or charge / discharge amount.

  In the “power generation planning method” of Patent Document 3 having the above-described configuration, a power generation plan capable of making a power generation plan that suppresses the fuel cost of the generator more than before by utilizing the capacity of the secondary battery. A planning method can be provided (see summary, claim 1, paragraphs 0027-0038, FIGS. 1-2).

  Patent Document 4 (Japanese Patent Application Laid-Open No. 2011-114945) discloses a power generation schedule of the internal combustion power generation facility with respect to an electric power system including an internal combustion power generation facility, a secondary battery, a renewable energy utilization power generation facility, and a load facility. A “supply power plan creation device” for creating a charge / discharge schedule for the secondary battery is disclosed. The power supply plan creation device includes a load prediction unit that predicts load power, which is power consumed by the load facility, in a predetermined time range and time interval, and power generated by the renewable energy-use power generation facility. Renewable use generated power prediction means for predicting at a time range and a time interval, supply power to be supplied by the internal combustion power generation facility and the secondary battery, and supply power at the predetermined time range and time interval, Supply power calculating means for calculating a difference between the predicted load power value and the predicted renewable power generation power generation value, a power generation schedule by the internal combustion power generation facility, and a charge / discharge schedule by the secondary battery, the predetermined time A means for creating each schedule in a range and a time interval, and an objective function relating to a power generation cost by the internal combustion power generation facility set in advance; The power generation schedule that satisfies the various constraints and has low power generation cost based on the various constraints on the internal combustion power generation facility and the secondary battery, and the supply power calculated by the supply power calculation means, and Supply power plan calculation means for determining a charge / discharge schedule.

  With the supply power plan creation device of Patent Document 4 having the above configuration, the purpose of realizing optimization of the power generation plan of the generator and the operation plan of the secondary battery can be achieved (summary, claim 1, paragraphs 0011, 0017). ~ 0035, see Figures 1 to 3).

  Patent Document 5 (Japanese Patent No. 5582831) discloses a “solar power generation system” that can supply power to an electric power system. This solar power generation system includes a memory for storing generator characteristics applied to the solar power generation system, system data of the power system to which the solar power generation system is coupled, output data from the solar power generation system to the power system, and Measuring means for measuring, target value setting means for accepting the setting of the operation target value of the photovoltaic power generation system, the generator characteristics read from the memory, the operation target value sent from the target value setting means, The calculation means for calculating the output target value to be output by the photovoltaic power generation system using the system data and the output data sent from the measurement means, the solar battery, the storage battery, and output from the solar battery and the storage battery. A power converter that converts the electrical energy into power suitable for the power system, and is based on the output target value calculated by the calculation means The generator characteristic stored in the memory is a plan of the generator characteristic associated with the time, and further includes a direct plan of the generator characteristic Plan setting means for receiving an input or remote input via a communication line, wherein the calculation means generates power that is associated with a clock and a current time of the clock according to a generator characteristic plan stored in the memory Characteristic selection means for selecting machine characteristics, and the output target value is calculated using the selected generator characteristics, the operation target value, the system data and the output data.

  The solar power generation system of Patent Document 5 having the above configuration can achieve the object of providing a solar power generation system having generator characteristics equivalent to a synchronous generator (claim 1, paragraphs 0014 to 0026, FIG. 1). reference).

  Non-Patent Document 1 (2014 General Resources and Energy Study Group / Working Group handouts) introduces measures to increase the amount of power generated by solar and wind power generators by introducing storage batteries into the power system Have been described. According to this, in the current power system, when the demand is less than the supply, the power supply / demand imbalance can be dealt with only by suppressing the amount of power generated by the thermal power generation facility and absorbing the surplus power generated by the operation of the pumped storage power generation facility. In many cases, it is impossible to suppress the output of solar power generators and wind power generators.

  Patent Document 6 (Japanese Patent No. 4848051) discloses a “sunshine rate calculation method, its system, and its program” that can calculate the sunshine rate in more detail. Patent Document 7 (Japanese Patent No. 5308560 specification) describes the amount of power generation in solar power generation at the solar power generation device level for each time zone without actually measuring sunshine intensity (amount of solar radiation), temperature, and power generation amount in real time. "A method and apparatus for predicting the amount of power generation in photovoltaic power generation" is disclosed. Patent Document 8 (Japanese Patent No. 4679670) discloses a “power charge trial calculation system” that achieves both reduction of user effort and presentation of an optimal charge plan that reflects the individual circumstances of the user. These techniques are all due to the present inventors, and are used in the present invention as described later.

JP 2011-090665 A JP 2013-169089 A Japanese Patent No. 4192131 JP 2011-114945 A Japanese Patent No. 5582831 Japanese Patent No. 4848051 Japanese Patent No. 5308560 Japanese Patent No. 4679670

Comprehensive Resource and Energy Study Group Energy Conservation and New Energy Subcommittee New Energy Subcommittee System Working Group (3rd) (December 16, 2014)

  The power system operation control system of Patent Document 1 having the above-described configuration can achieve the purpose of stably operating the power system while maximally utilizing the renewable energy generator. However, the central system controls the thermal power / hydraulic power generator in order to eliminate the power supply / demand imbalance in the power system, and the renewable energy power generation control system that controls the renewable energy generator includes: Since the renewable energy generator is controlled so as to be within the interconnection possible amount that is the amount of electricity generated by the renewable energy generator that can be connected to the electric power system, the amount of electricity generated by the renewable energy generator can be interconnected. Limited by amount. For this reason, the maximum utilization of the renewable energy generator is only performed under the condition that the power system is stably operated, and is insufficient.

  The operation method of the electric power system of patent document 2 which has the structure mentioned above can extract the capability of the said storage battery to the maximum by performing the electric power supply by the said storage battery in the scheduled time slot | zone of a scheduled date. However, no consideration is given to the point of maximizing the power generation capacity of the solar power generation apparatus connected to the power system, and there is no such suggestion.

In the power generation planning method of Patent Document 3 having the above-described configuration, the sum of the fixed power generated by the fixed power generator and the variable power generated by the variable power generator is calculated from the total demand power. By subtracting, the total shared power shared by the secondary battery is calculated, and each secondary battery is controlled based on the individual shared power calculated based on the total shared power. Therefore, the capacity of the secondary battery is utilized. Thus, it is possible to make a power generation plan that suppresses the fuel cost of the generator more than before. However, no consideration is given to the point of maximizing the power generation capacity of the solar power generation apparatus connected to the power system, and there is no such suggestion.
The supply power plan creation device of Patent Document 4 having the above-described configuration realizes optimization of the power generation plan of the generator and the operation plan of the secondary battery by suppressing the power generated by the power generation facility using renewable energy. The purpose can be achieved. However, no consideration is given to the point of maximizing the power generation capacity of the solar power generation apparatus connected to the power system, and there is no such suggestion.

  In the solar power generation system of Patent Document 5 having the above-described configuration, a solar power generation system having generator characteristics equivalent to a synchronous generator can be provided. However, no consideration is given to the point of maximizing the power generation capacity of the solar power generation apparatus connected to the power system, and there is no such suggestion.

  According to the description of Non-Patent Document 1 described above, even when a storage battery is introduced into the power system, it is understood that there is a high possibility that output suppression of the solar power generation apparatus frequently occurs particularly in a time zone in which demand is lower than supply. Therefore, there is a very high need for means that can eliminate the suppression of the output of the solar power generation apparatus connected to the power system and always make maximum use of its power generation capacity.

  The present invention has been made in consideration of the above-mentioned difficulties of the prior art and the current state of the power system and various power generation facilities. The purpose of the present invention is “excess demand due to concentration of peak power generation”. While suppressing the phenomenon (Fig. 1), the output of solar power generators connected to the power system can be eliminated and the power generation capacity can be fully utilized at all times, and it is not affected by the weather. An object of the present invention is to provide a power system control method and a control system capable of supplying stable power to the power system.

  Another object of the present invention is to greatly increase the total number of photovoltaic power generation devices connected to the power system (substantially unlimitedly), and to cover all the total annual power generation with solar power generation devices in the future. It is another object of the present invention to provide a power system control method and control system that can be expected.

  Other objects of the present invention which are not specified here will be apparent from the following description and the accompanying drawings.

A power system control method according to a first aspect of the present invention includes:
A plurality of first solar power generation devices configured to store the generated power in the attached storage battery and then supply power to the power system, and a plurality configured to supply the generated power directly to the power system And a plurality of non-solar renewable energy power generators (hereinafter also referred to as non-solar renewable energy power generators) configured to feed the generated power directly to the power system. And a power system comprising a plurality of non-renewable energy power generation devices (hereinafter also referred to as non-renewable power generation devices) configured to supply the generated power directly to the power system. There,
(A) Obtain an estimated demand amount per hour on the next day and the next day after the forecast date on or before any forecast date;
(B) For each of the attached storage batteries of the plurality of first photovoltaic power generation apparatuses, the predicted power storage amount for the next day is calculated based on a weather forecast on the predicted date, and the predicted power storage amount is determined on the predetermined day after the next day. Calculate the predicted discharge amount per hour when discharging to the power system during the discharge time zone,
(C) On the prediction date, the actual discharge amount per hour on the next day is calculated from the storage results of each of the auxiliary storage batteries of the plurality of first photovoltaic power generation devices,
(D) calculating the predicted power generation amount per hour on the next day and the next day of each of the plurality of second photovoltaic power generation devices based on a weather forecast on the prediction day;
(E) obtaining the predicted power generation amount per hour on the next day and the next day of each of the plurality of non-solar renewable energy power generation devices, on or before the predicted date,
(F) On the prediction date, the total value of the actual discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices, and the next day of the plurality of second solar power generation devices Based on the total value of the predicted power generation amount per hour, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the predicted demand amount per hour on the next day, Considering the supply and demand balance, create an operation plan for the next day for each of the non-renewable power generation devices,
(G) On the predicted date (or the next day), a total value of the predicted discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices, and the plurality of second solar power generation devices A total value of the predicted power generation amount per hour on the next day, a total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the predicted demand amount per hour on the next day On the basis of the power supply and demand balance, create an operation plan for the next day of each of the plurality of non-renewable power generation devices,
(H) When the next day's operation plan is executed on the next day, each of the auxiliary storage batteries of the first photovoltaic power generation device is used in the discharge time zone with the actual discharge amount per hour on the next day. Discharging the power system,
(I) During execution of the operation plan for the next day, a total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices, and the plurality of second solar power generation devices When the sum of the total predicted power generation per hour and the total predicted power generation per hour of the plurality of non-solar renewable energy power generation devices exceeds the predicted demand per hour, the excess The amount is absorbed by the excess absorption means.

  In the power system control method according to the first aspect of the present invention described above, on the prediction date, the total value of the actual discharge amount per hour on the next day of the auxiliary storage battery of the plurality of first solar power generation devices, The total value of the predicted power generation amount per hour on the next day of the plurality of second solar power generation devices, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar solar power generation devices, Based on the predicted demand per hour on the next day, in consideration of the power supply / demand balance, in other words, the total value of the actual discharge per hour of the attached storage battery of the first photovoltaic power generator, 2 The sum of the predicted power generation amount per hour of the photovoltaic power generation device, the sum of the total value of the predicted power generation amount per hour of the non-solar solar power generation device (sum of the predicted supply amount per hour), and the time As or to compensate for difference between the predicted demand, creating the the next day of the operation plan of each of the non-renewable energy power generating apparatus.

  Similarly, on the next day (or the day after next), a total value of the predicted discharge amount per hour on the day after day of the auxiliary storage battery of the plurality of first solar power generation devices and a plurality of the second sunlight. The total value of the predicted power generation amount per hour on the next day of the power generation device, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the predicted demand per hour on the next day In other words, considering the balance between power supply and demand based on the amount, in other words, the total value of the predicted discharge amount per hour of the auxiliary storage battery of the first solar power generation device and the second solar power generation device The sum of the predicted power generation per hour, the sum of the total predicted power generation per hour of the non-solar renewable energy power generation device (sum of the predicted supply per hour), and the predicted per hour To compensate for the difference between the demand to create each of the following day worth of operation plan of the non-renewable energy power generating apparatus.

  And when the next day's operation plan for the next day is executed on the next day, each of the auxiliary storage batteries of the first photovoltaic power generation device in the discharge time zone is the actual discharge amount per hour on the next day. Discharge to the power system. In other words, the electric power stored in each of the auxiliary storage batteries of the first photovoltaic power generation apparatus takes a long time of, for example, about 24 hours in the discharge time zone on the next day, and the actual discharge amount per hour on the next day. To discharge the power system.

  For this reason, even if the power generation amount of the plurality of first solar power generation devices is superimposed and rapidly increased during the middle and middle hours, it is gradually discharged over a time period of about 24 hours, so that it is given to the power system during the middle and middle hours. The influence is reduced from 1/3 of the case of not gradually discharging in this way to 1/4. Therefore, the phenomenon of “excess demand due to concentration of peak power generation” can be suppressed (substantially eliminated).

  In addition, during the execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices and the time of the plurality of second solar power generation devices When the sum of the total predicted power generation amount per hour and the sum of the total predicted power generation amounts per hour of the plurality of non-solar solar power generation devices exceeds the predicted per hour demand amount, the excess amount Is absorbed by the excess absorption means, so a situation in which the output of the first and second photovoltaic power generation devices needs to be suppressed does not occur.

  Therefore, the power generation capacity of the first and second photovoltaic power generators connected to the power system can be utilized to the maximum while suppressing the phenomenon of “excess demand due to concentration of peak power generation”.

  Further, on the prediction date, an actual discharge amount per hour on the next day is calculated from the storage performance of each of the attached storage batteries of the plurality of first solar power generation devices, and the plurality of the non-renewable power generation devices are used by using this Therefore, even if the predicted discharge amount per hour included in the operation plan for the next day is greatly deviated from the actual discharge amount due to a weather forecast error, the next day Thus, the power system is re-created by using the actual discharge amount calculated from the storage performance of each of the attached storage batteries, so that the power system is not adversely affected. Therefore, stable power can be supplied to the power system regardless of the weather.

  In addition, during the execution of the operation plan for the next day on the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices and the plurality of second solar power generation devices When the sum of the predicted power generation amount per hour and the sum of the predicted power generation amounts per hour of the plurality of non-solar solar power generation devices exceeds the predicted demand amount per hour, Since the excess is absorbed by the excess absorption means (for example, a storage battery for adjustment, a pumped storage power generator, another power company power system / power generator, etc.) provided in the power system, the first Or even if the number of connected (installed) second solar power generation devices increases, output suppression does not occur for the added solar power generation devices as well as the existing first and second solar power generation devices. To do Possible it is. Therefore, the total number of photovoltaic power generators connected to the power system can be increased significantly (almost unlimitedly). In the future, it will be possible to expect that all of the annual power generation will be covered by solar power generation equipment.

(2) In a preferred example of the power system control method according to the first aspect of the present invention, each of the attached storage batteries of the plurality of first solar power generation devices includes a first power storage unit capable of switching between discharge and power storage. A second power storage unit is provided, and one of the first power storage unit and the second power storage unit is used for discharging performed according to the operation plan for the next day, and the other increases the power storage result for the next day. Configured to be used for power storage,
The discharge performed according to the operation plan for the next day and the power storage for increasing the power storage result for the next day are executed in parallel on the next day using the first power storage unit and the second power storage unit,
Switching between storage and discharge of the first power storage unit and the second power storage unit is performed at the same time every day.

(3) In another preferable example of the power system control method according to the first aspect of the present invention, the power system further includes an adjustment storage battery connected to the power system, and the plurality of first sunlights on the next day. The target discharge amount is set to the total value of the actual discharge amount per hour of the power generator,
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
When the target discharge amount exceeds the total value of the actual discharge amount per time, if the storage amount of the adjustment storage battery is sufficient, the difference between the target discharge amount and the total value is calculated as the adjustment storage battery. If the amount of electricity stored in the adjustment storage battery is not sufficient, the difference between the target discharge amount and the total value is supplemented using a pumped-storage power generator or another power company power system / power generator. And
When the target discharge amount does not exceed the total value of the actual discharge amount per time, the difference between the target discharge amount and the total value is absorbed by the power stored in the adjustment storage battery.

(4) In still another preferred example of the method for controlling the power system according to the first aspect of the present invention, the power system further includes a pumped-storage power generator installed in the power system, and the plurality of the first on the next day. The target discharge amount is set to the total value of the actual discharge amount per hour of the solar power generation device,
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
Further, the predicted demand amount per hour and the target discharge amount are compared, and depending on the result, the difference between the target discharge amount and the actual discharge amount per time or the predicted demand amount per hour and the actual discharge amount per hour. The difference from the discharge amount is absorbed by using a pumped-storage power generator or another electric power company power system / power generator.

(5) An electric power system control system according to a second aspect of the present invention includes:
A plurality of first solar power generation devices configured to store the generated power in the attached storage battery and then supply power to the power system, and a plurality configured to supply the generated power directly to the power system A second solar power generation device, a plurality of non-solar solar power generation devices configured to supply the generated power directly to the power system, and the generated power directly supplied to the power system A system for controlling an electric power system comprising a plurality of non-renewable power generation devices configured to:
(A) Predicted demand amount acquisition means for acquiring the predicted demand amount per hour on the next day and the second day after the prediction date, on or before any forecast date;
(B) For each of the attached storage batteries of the plurality of first photovoltaic power generation apparatuses, the predicted power storage amount for the next day is calculated based on a weather forecast on the predicted date, and the predicted power storage amount is determined on the predetermined day after the next day. Predicted discharge amount calculating means for calculating a predicted discharge amount per hour when discharging to the electric power system during the discharge time zone,
(C) On the prediction date, an actual discharge amount calculating means for calculating an actual discharge amount per hour on the next day from a storage result of each of the attached storage batteries of the plurality of first solar power generation devices;
(D) Predicted power generation amount calculation means for calculating a predicted power generation amount per hour on the next day and the next day of each of the plurality of second solar power generation devices based on a weather forecast on the prediction date;
(E) Predicted power generation amount acquisition means for acquiring the predicted power generation amount per hour on the next day and the next day of each of the plurality of non-solar renewable energy power generation devices, on or before the predicted date,
(F) An operation plan creation means for creating an operation plan for the next day and the next day of each of the plurality of non-renewable power generation devices in consideration of a power supply / demand balance on the forecast date;
(G) When the operation plan for the next day is executed on the next day, each of the auxiliary storage batteries of the first photovoltaic power generator is set in the discharge time zone with the actual discharge amount per hour on the next day. Attached storage battery discharging means for discharging to the power system,
(H) During execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the attached storage battery of the plurality of first solar power generation devices, and the plurality of second solar power generation devices When the sum of the total predicted power generation per hour and the total predicted power generation per hour of the plurality of non-solar renewable energy power generation devices exceeds the predicted demand per hour, the excess An excess absorption means for absorbing the minutes,
(I) The operation plan creation means includes a total value of the actual discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices and the plurality of second sunlight on the prediction date. The total value of the predicted power generation amount per hour on the next day of the power generation device, the total value of the predicted power generation amount per hour on the next day of the non-solar renewable energy power generation devices, and the predicted demand per hour on the next day Based on the amount, create an operation plan for the next day of each of the plurality of non-renewable power generation devices in consideration of the power supply-demand balance,
On the predicted date (or the next day), the total value of the predicted discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices and the next day of the second solar power generation devices Based on the total value of the predicted power generation amount per hour in the above, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable power generation devices, and the predicted demand amount on the next day In consideration of the power supply / demand balance, an operation plan for the next day of each of the plurality of non-renewable power generation devices is created.

  In the above-described power system control system according to the second aspect of the present invention, the operation plan creation means causes the actual value per hour on the next day of the attached storage batteries of the plurality of first solar power generation apparatuses to be calculated on the predicted date. The total value of the discharge amount, the total value of the predicted power generation amount per hour on the next day of the plurality of second solar power generation devices, and the predicted power generation per hour on the next day of the plurality of non-solar renewable energy power generation devices Based on the total value of the amount and the predicted demand amount per hour on the next day, in consideration of the power supply-demand balance, in other words, the actual discharge amount per hour of the auxiliary storage battery of the first solar power generation device Of the total predicted value of power generation per hour of the second solar power generation device and the total value of predicted power generation amount per hour of the non-solar solar power generation device ( Ri and the sum of the predicted supply amount), so as to compensate for the difference between the predicted demand per the time, creating the the next day of the operation plan of each of the non-renewable energy power generating apparatus.

  Similarly, on the next day (or the day after next), a total value of the predicted discharge amount per hour on the day after day of the auxiliary storage battery of the plurality of first solar power generation devices and a plurality of the second sunlight. The total value of the predicted power generation amount per hour on the next day of the power generation device, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the predicted demand per hour on the next day In other words, considering the balance between power supply and demand based on the amount, in other words, the total value of the predicted discharge amount per hour of the auxiliary storage battery of the first solar power generation device and the second solar power generation device The sum of the predicted power generation per hour, the sum of the total predicted power generation per hour of the non-solar renewable energy power generation device (sum of the predicted supply per hour), and the predicted per hour To compensate for the difference between the demand to create each of the following day worth of operation plan of the non-renewable energy power generating apparatus.

  Then, when the operation plan for the next day is executed on the next day, the attached storage battery discharging means causes the actual discharge amount per hour on the next day, and the first solar power generation device in the discharge time zone. Each of the attached storage batteries is discharged to the power system. In other words, the electric power stored in each of the auxiliary storage batteries of the first photovoltaic power generation apparatus takes a long time of, for example, about 24 hours in the discharge time zone on the next day, and the actual discharge amount per hour on the next day. To discharge the power system.

  For this reason, even if the power generation amount of the plurality of first solar power generation devices is superimposed and rapidly increased during the middle and middle hours, it is gradually discharged over a time period of about 24 hours, so that it is given to the power system during the middle and middle hours. The influence is reduced from 1/3 of the case of not gradually discharging in this way to 1/4. Therefore, the phenomenon of “excess demand due to concentration of peak power generation” can be suppressed (substantially eliminated).

  In addition, during the execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices and the time of the plurality of second solar power generation devices When the sum of the total predicted power generation amount per hour and the sum of the total predicted power generation amounts per hour of the plurality of non-solar solar power generation devices exceeds the predicted per hour demand amount, the excess amount Is absorbed by the excess absorption means, so a situation in which the output of the first and second photovoltaic power generation devices needs to be suppressed does not occur.

  Therefore, the power generation capacity of the first and second photovoltaic power generators connected to the power system can be utilized to the maximum while suppressing the phenomenon of “excess demand due to concentration of peak power generation”.

  Further, the actual discharge amount calculating means calculates the actual discharge amount per hour on the next day from the storage results of each of the auxiliary storage batteries of the plurality of first solar power generation devices on the prediction date, and creates the operation plan By means of this, an operation plan for the next day of each of the non-renewable power generation devices is created using this, so that the predicted discharge amount per hour included in the operation plan for the next day is the weather forecast Even if the actual discharge amount greatly deviates due to the detachment, it will be recreated using the actual discharge amount per hour calculated from the storage performance of each of the attached storage batteries on the next day, so that the power system will be adversely affected. It does not reach. Therefore, stable power can be supplied to the power system regardless of the weather.

  In addition, during the execution of the operation plan for the next day on the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices and the plurality of second solar power generation devices When the sum of the predicted power generation amount per hour and the sum of the predicted power generation amounts per hour of the plurality of non-solar solar power generation devices exceeds the predicted demand amount per hour, Since the excess is absorbed by the excess absorption means (for example, an adjustment storage battery, a pumped-storage power generator, another power company power system / power generator, etc.), the first or second photovoltaic power generator Even if the number of connections (installation) increases, it is possible to prevent output suppression not only for the existing first and second solar power generation devices but also for the added solar power generation devices. . Therefore, the total number of photovoltaic power generators connected to the power system can be increased significantly (almost unlimitedly). In the future, it will be possible to expect that all of the annual power generation will be covered by solar power generation equipment.

(6) In a preferred example of a power system control system according to the second aspect of the present invention, each of the auxiliary storage batteries of the plurality of first solar power generation devices includes a first power storage unit capable of switching between discharge and power storage. A second power storage unit is provided, and one of the first power storage unit and the second power storage unit is used for discharging performed according to the operation plan for the next day, and the other increases the power storage result for the next day. Configured to be used for power storage,
The discharge performed according to the operation plan for the next day and the power storage for increasing the power storage performance for the next day are executed in parallel on the next day using the first power storage unit and the second power storage unit,
Switching between storage and discharge of the first power storage unit and the second power storage unit is performed at the same time every day.

(7) In another preferable example of the power system control system according to the second aspect of the present invention, the power system further includes an adjustment storage battery connected to the power system, and the plurality of first sunlights on the next day. The target discharge amount is set to the total value of the actual discharge amount per hour of the power generator,
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
When the target discharge amount exceeds the total value of the actual discharge amount per time, if the storage amount of the adjustment storage battery is sufficient, the difference between the target discharge amount and the total value is calculated as the adjustment storage battery. If the amount of electricity stored in the adjustment storage battery is not sufficient, the difference between the target discharge amount and the total value is supplemented using a pumped-storage power generator or another power company power system / power generator. And
When the target discharge amount does not exceed the total value of the actual discharge amount per time, the difference between the target discharge amount and the total value is absorbed by the power stored in the adjustment storage battery.

(8) In still another preferred example of the power system control system according to the second aspect of the present invention, the power system further includes a pumped-storage power generator installed in the power system, and the plurality of the first on the next day. The target discharge amount is set to the total value of the actual discharge amount per hour of the solar power generation device,
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
Further, the predicted demand amount per hour and the target discharge amount are compared, and depending on the result, the difference between the target discharge amount and the actual discharge amount per time or the predicted demand amount per hour and the actual discharge amount per hour. The difference from the discharge amount is absorbed by using a pumped-storage power generator or another electric power company power system / power generator.

  According to the power system control method according to the first aspect of the present invention and the power system control system according to the second aspect of the present invention, (a) the phenomenon of “excess demand due to concentration of peak power generation” is suppressed. However, the power generation capacity can be fully utilized at all times by eliminating the output suppression of the photovoltaic power generator connected to the power system. (B) Supplying stable power to the power system regardless of the weather (C) The total number of photovoltaic power generation devices connected to the power system can be greatly increased (almost unlimitedly), and in the future, all of the total annual power generation will be covered by photovoltaic power generation devices. Can also be expected.

It is explanatory drawing which shows the phenomenon "the demand amount excess by concentration of peak power generation" produced by solar power generation. It is a conceptual diagram which shows the whole structure of the electric power system by which the control system of the electric power system which concerns on one Embodiment of this invention was used. It is a functional block diagram which shows schematic structure of the control system of the electric power system which concerns on one Embodiment of this invention. The conceptual diagram which shows the processing content performed with the control system of the electric power system which concerns on one Embodiment of this invention in time series, (a) is a case where target management is performed, (b) is a case where target management is not performed. It is explanatory drawing which shows the process (operation flow) performed with the control system of the electric power grid | system which concerns on one Embodiment of this invention. It is a flowchart which shows the process (operation flow) of the control system of the electric power system which concerns on one Embodiment of this invention. An operation (discharge target creation flow) for creating a discharge target (calculating a target discharge amount per hour) from a photovoltaic power generation apparatus having an attached storage battery, which is executed by the power system control system according to an embodiment of the present invention. It is a flowchart to show. It is a flowchart which shows the process (predicted power generation amount totalization flow) which totals the predicted power generation amount by all the power generators performed with the control system of the electric power system which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the electrical storage performance collection / discharge unit calculation part of the control system of the electric power system which concerns on one Embodiment of this invention. In the control system of the electric power system which concerns on one Embodiment of this invention, it is explanatory drawing which shows the operation | movement flow of the discharge amount adjustment part when performing target management mainly with the storage battery for adjustment. In the control system of the electric power system which concerns on one Embodiment of this invention, it is explanatory drawing which shows the operation | movement flow of the discharge amount adjustment part in the case of performing target management by pumped-storage power generation and other electric power cooperation. It is a block diagram of the power plant basic information table, the roof basic information table, the discharge amount basic information table, and the power generation amount prediction basic information table used in the power system control system according to an embodiment of the present invention. It is a figure which shows the structure of the information recording table used with the control system of the electric power system which concerns on one Embodiment of this invention, (a) is a discharge amount table (for industrial solar power generation devices 4 with a storage battery), (b) Is a power generation amount prediction table 1 (4 and 5 for industrial solar power generators with and without storage batteries), and (c) is a configuration diagram of a power generation amount prediction table 2 (for home solar power generation devices 6 without storage batteries). It is. It is a block diagram of the demand prediction table used with the control system of the electric power grid | system which concerns on one Embodiment of this invention. It is a lineblock diagram of the prediction power generation amount daily total table used with the control system of the electric power system concerning one embodiment of the present invention. It is a block diagram of the discharge target table used with the control system of the electric power system which concerns on one Embodiment of this invention. It is explanatory drawing which shows the change of the preservation | save content of the electric power generation amount prediction tables 1 and 2 and the discharge amount table which are used with the control system of the electric power system which concerns on one Embodiment of this invention. It is explanatory drawing which shows the outline | summary of the process performed by the control system of the electric power system which concerns on one Embodiment of this invention, and totals the electric power generation on the day after the prediction day and the day after next. (A) is explanatory drawing which shows the structure of the auxiliary storage battery of a solar power generation device and power transmission equipment used with the electric power system control system which concerns on one Embodiment of this invention, (b) is a daily function sharing of the storage battery. It is explanatory drawing shown. (A) is a flowchart which shows the discharge control of the auxiliary storage battery of the control system of the electric power system which concerns on one Embodiment of this invention, (b) is a flowchart which shows the discharge and electrical storage control of the storage battery for adjustment. It is a table | surface which shows the number of weather forecast districts of Japan. It is a graph which shows the correlation of the daily maximum solar radiation intensity | strength and the global solar radiation amount of a day. It is a graph which shows the electric power generation amount at the time of the summer solstice and the winter solstice of A power plant of Kofu-shi. It is a graph which shows the monthly change of the annual global solar radiation amount in various parts of Japan (Nemuro, Kofu, Ishigakijima). It is a graph which shows the example of the monthly average power generation amount (1 year) obtained with the control system of the electric power system which concerns on one Embodiment of this invention. It is a table | surface which shows an example of the result of having estimated the electric power generation amount based on the weather forecast. FIG. 27 is a graph showing a result (power generation amount) predicted based on the weather forecast of FIG. 26. It is a graph which shows the example which contrasted the prediction electric power generation amount and the actual electric power generation amount which were obtained using the prediction method of the patent document 6 and patent document 7 which belong to this applicant's possession from the weather performance. (A) is a graph showing the predicted power generation amount, the predicted consumption amount and the predicted power sale amount of a household solar power generation device with self-consumption, and (b) is a table showing its original data. It is a graph which shows the example of the change according to the hour according to the amount of accumulation of electricity and the amount of discharge obtained with the control system of the electric power system concerning one embodiment of the present invention. It is a graph which shows the example of the change of the total discharge amount at the time of utilizing the target management obtained with the control system of the electric power system which concerns on one Embodiment of this invention. In the control system of the electric power system which concerns on one Embodiment of this invention, it is a graph which shows an example in case discharge amount may exceed demand amount by 24 hours discharge. (A) is the graph which shows the change of the electric power generation amount in the control system of the electric power system which concerns on one Embodiment of this invention when target value> actual discharge amount, (b) is a table | surface which shows the original data. (A) is the graph which shows the change of the electric power generation amount in the control system of the electric power system which concerns on one Embodiment of this invention when target value <= actual discharge amount, (b) is a table | surface which shows the original data.

(Basic principle of the present invention)
Before describing embodiments of the present invention, the basic principle of the present invention will be described.

(I) Generally, the amount of power generation (kW) per day of a solar power generation device has a characteristic that it is maximized during south-central time, and the maximum power generation amount is the solar radiation intensity (kW / m ² ) and solar radiation during south-central time. It is proportional to the amount (J / m ² ). The solar radiation intensity affects the maximum power generation amount per hour of the day, and the solar radiation amount affects the daily power generation amount. As shown in FIG. 22, the maximum solar radiation intensity and the maximum solar radiation amount in one day are the maximum at the summer solstice when the solar altitude is the highest in Japan north of the north regression line, and the minimum at the winter solstice. For this reason, as shown in FIG. 23, the power generation amount of the solar power generation device is maximized around the summer solstice, which is the maximum value throughout the year. Therefore, when a storage battery is attached to a solar power generation device, a storage battery having a capacity capable of storing the accumulated power generation amount (integrated power) per day of the solar power generation device generated around the summer solstice is prepared, and solar power generation is performed every day. Once the power generated by the device is stored (charged) in the attached storage battery, and then gradually discharged over one day (that is, 24 hours), for example, as shown in FIG. It will be possible to respond to the amount of power generated by the photovoltaic power generator throughout the year. FIG. 30 shows an example of daily and hourly changes in the storage amount and discharge amount of the attached storage battery.

  After the power generation by the solar power generation device is completed, the power for one day stored in the attached storage battery, that is, the “total power generation amount per day” is gradually discharged over the next day (24 hours) to the power system. When power is supplied, the amount of discharge per hour is calculated from the amount of power generated during the summer solstice and the time of the winter solstice. The amount of discharge per hour is 33. 8%, equivalent to 24.5% of the “power generation per hour” during the south-central time of the winter solstice. In other words, the amount of discharge per hour from the attached storage battery is about (1/3) of the amount of power generation per hour during the south-central time around the summer solstice, and about (1 / It will go down to 4). Therefore, after the power generation of the solar power generation apparatus is completed every day, the power stored in the attached storage battery (cumulative power generation amount per day) is then gradually discharged, for example, over 24 hours. It is possible to greatly mitigate the influence of the phenomenon of “excess demand due to concentration” (FIG. 1).

  In addition, when the electric power for one day (integrated power generation amount per day) stored in the attached storage battery is gradually discharged and supplied to the power system, the length of the discharge time zone is not exactly one day = 24 hours. Needless to say. 24 hours is most preferable, but it may be 23 hours, 22 hours, or shorter than 22 hours. However, it is preferable that the length is as long as possible (that is, one that is close to 24 hours a day). This is because the closer to 24 hours, the lower the “power generation per hour”. In addition, since a problem arises in the operation of the power system, it is preferable that the length of the discharge time zone does not exceed 24 hours. Here, the length of the discharge time zone is described as 1 day = 24 hours.

  (Ii) In the above case, the predicted discharge amount per hour from the auxiliary storage battery of the photovoltaic power generation apparatus is given by the following formula 1.

Predicted discharge amount per hour = (Predicted integrated power generation amount-Storage loss amount-
Storage loss after 24 hours) ÷ 24 (Formula 1)
Here, the “predicted amount of discharge per hour” is the amount of power that is predicted to be discharged from the attached storage battery per hour on an arbitrary day. The “predicted integrated power generation amount” is the amount of power that is predicted to be generated by the solar power generation device on that day. The “storage loss amount” is a power loss that occurs during storage in the attached storage battery on that day, and the “storage loss amount after 24 hours” is a power loss that occurs during 24 hours of storage in the attached storage battery.

  “Predicted integrated power generation” is calculated on any forecast day based on the weather forecast, but is at least a few errors from the actual integrated power generation (actual integrated power generation) on the power generation date (for example, the day after the prediction date). % Is usually present. Considering only the power generation date, an error of several percent is not a problem. However, considering the continuous operation for 365 days, there is a great risk that the error accumulates and develops into a large error. Therefore, it is necessary to prevent the accumulation of this error in some way. In consideration of this point, in the present invention, the actual amount of electricity stored in the attached storage battery (actual amount of electricity stored) via the communication network at the time when the power generation by the solar power generation device is completed (for example, the evening of the day of power generation). And calculate the "real discharge amount per hour" from the actual power storage amount, and the discharge from the attached storage battery is not the "predicted discharge amount per hour" calculated on the prediction day, but this "real discharge amount per hour" I'm trying to do it. By doing so, it is possible to avoid accumulation of errors between the actual integrated power generation amount of the photovoltaic power generation apparatus and the predicted integrated power generation amount.

  In this case, the “actual discharge amount per hour” from the attached storage battery of the solar power generation device can be obtained by the following formula 2.

Actual discharge amount per hour = (Actual storage amount−Amount of storage loss after about 24 hours−
Reserve amount) ÷ 24 (Formula 2)
The reason that the term “storage loss” is not included in Equation 2 is that “storage loss” is already reflected (subtracted) in the “real storage amount” obtained through the communication network. Further, the “standby amount” is added so that a certain amount of stored electricity always remains even after the completion of discharge. This is because a storage battery generally has a characteristic that its output (amount of discharge) rapidly decreases when the amount of stored electricity becomes a certain amount or less. If there is no such concern, “reserve” is not required.

  In addition, as described above, when the power stored in the attached storage battery is gradually discharged over 24 hours after the end of power generation by the photovoltaic power generation apparatus, the predicted integrated power generation amount calculated on the prediction day affects the following two days. . Therefore, if the predicted integrated power generation amount deviates significantly from the actual integrated power generation date on the power generation date (the day after the prediction date), the influence extends to the control of the power system two days later (the day after the prediction date). The reason why the predicted integrated power generation amount deviates from the actual integrated power generation amount is that the weather forecast is off, the solar power generation device is broken, the power generation amount of the solar power generation device is suppressed due to the output suppression, the solar power generation panel of the solar power generation device There are various things such as power generation failure due to the remaining snow above. However, in the present invention, when the power generation by the solar power generation device on the power generation date (the day after the prediction date) is completed, the actual power storage amount of the attached storage battery is obtained via the communication network and calculated based on the actual power storage amount. Instead of using the "Actual discharge amount per hour" instead of the "Predicted discharge amount per hour", the discharge from the attached storage battery is started, so even if the error between the predicted integrated power generation amount and the actual integrated power generation amount increases, There is no problem.

  (Iii) As described above, for example, when discharging gradually over 24 hours immediately after the end of power generation by the solar power generation apparatus, it is necessary to simultaneously store and discharge the attached storage battery. For this purpose, in the present invention, for example, a storage battery having a configuration as shown in FIG. 19 is used. The storage battery of FIG. 19 has first and second power storage units and means for switching between the power storage and discharge. The two power storage units are switched and controlled by a command from the control system so that the second power storage unit is discharged when charging the first power storage unit and the first power storage unit is discharged when charging the second power storage unit. By doing so, it is possible to simultaneously store and discharge these storage units.

  (Iv) As described above, when the power stored in the attached storage battery is discharged gradually over 24 hours, for example, after the end of power generation by the solar power generation device, it is necessary to consider the power supply / demand balance. That is, when the number of installed photovoltaic power generation devices (number of connections) in the power system increases, the amount of discharge from the attached storage battery also increases, and the amount of power generated directly from the photovoltaic power generation device that does not have the attached storage battery also increases. . For example, as shown in FIG. 32, in a time zone when the demand for electric power at night is low, the amount of power directly supplied from a solar power generation device without an attached storage battery is zero, and only the amount of discharge from the attached storage battery is in the power system. Power is supplied, but at that time, the total amount of discharge from the attached storage battery may exceed the demand. Therefore, before starting the discharge from the attached storage battery, check the supply-demand balance based on the "predicted demand per hour" calculated in advance, and take measures when the total discharge exceeds the predicted demand It is necessary to stand up.

  Therefore, in the present invention, in the time zone when the demand for electric power at night is low, the “actual discharge amount per hour” from all the attached storage batteries installed in the power system and all the attached storage batteries installed in the power system are not used. The sum of the “predicted discharge amount per hour” of the solar power generation device and the power generation amount of the non-solar renewable energy power generation device (for example, wind power generation device) installed in the power grid exceeds the “predicted demand amount per hour”. If it is determined, the measure is taken to absorb the excess by the “excess absorption means”. Specifically, for example, (a) the battery is stored in an adjustment storage battery. (B) Operate the pumped-storage generator connected to the power system to pump water from the lower reservoir (lower pond) to the upper reservoir (Kamiike dam), (c) Others connected to the power system Measures such as transmitting power to an electric power company power system / power generation device are prepared, and any one of them is used in any combination.

  (V) Next, target setting (discharge target setting) for the discharge amount of the attached storage battery and target management using the discharge target will be described.

  It is a well-known fact that the amount of photovoltaic power generation depends on the weather. When it is clear, the amount of power generation is large, and when it is raining, it is small. When viewed daily, the amount of power generation varies greatly depending on the weather. However, there is little change when comparing yearly and monthly. The difference in the same month is small. The reason is as follows.

  That is, the earth revolves around the sun along a predetermined orbit and rotates around a predetermined earth axis. The energy obtained from the sun is almost the same even if there is a monthly difference during one revolution period (annual), and there is almost no year-to-year fluctuation. Most are decided. FIG. 24 shows changes in monthly total solar radiation for 5 years in Nemuro, Kofu, and Ishigakijima. As can be seen from the figure, in all regions, the monthly total solar radiation amount has changed in the same pattern, and the difference in 5 years is about the measurement error, which is 2 to 3 times larger. It has not occurred. This is a point where solar power generation differs greatly from wind power generation.

  FIG. 28 is a graph showing an example (October data of City A) in which the predicted power generation amount and the actual power generation amount from the weather results are compared by the prediction methods of Patent Document 6 and Patent Document 7 owned by the present applicant. It is. As shown in the figure, according to the prediction methods of Patent Document 6 and Patent Document 7, the prediction accuracy of the power generation amount based on the past weather performance is as extremely high as 94.7%. In the prediction methods based on both documents, the power generation amount can be predicted with high accuracy. Therefore, a target discharge amount (discharge target) is set in advance for each photovoltaic power generation device using the prediction method, and the target discharge amount (always) If “target management” is performed to control the attached storage battery to discharge at the discharge target), even if there is a change in the weather, it can be easily handled by compensating the predicted power generation amount according to the change. . Even if the actual power generation amount temporarily decreases due to bad weather, if it is compensated with the actual power generation amount in clear weather within several months, the actual power generation amount for several months will be almost within the predicted range.

  In general, the cause of the actual power generation amount of the solar power generation device dropping significantly from the predicted power generation amount is mainly due to failure of the solar power generation device and output suppression. However, failure of solar power generation equipment rarely occurs, and even if it happens, quick response is taken, so it does not lead to a significant drop in actual power generation. However, in view of the number of connected solar power generation devices (number of installations) already certified under the FIT system, the frequency of output suppression is expected to become extremely high in the future. If there is output suppression, the actual power generation amount on a sunny day will be less than half that without output suppression, and there will be a problem that solar power generation will not be used effectively, but a further problem will be output for each solar power generation device It is impossible to predict whether or not suppression will be implemented. However, as in the present invention, this problem can be assured by controlling so that a storage battery is attached to the photovoltaic power generation apparatus and once stored in the storage battery, and then gradually discharged in a discharge time zone of approximately 24 hours. To be resolved. It is possible to eliminate the occurrence of output suppression for the solar power generation device.

  In the present invention, in order to facilitate the above-described “target management”, for example, an adjustment storage battery (adjustment secondary battery) is directly installed in the power system. In this case, first, a “target discharge amount per hour” for the attached storage battery of the solar power generation device is set from the predicted power generation amount obtained from the past weather performance. Then, the difference between the “target discharge amount per hour” and the “actual discharge amount per hour” is corrected by the storage and discharge of the adjustment storage battery so that the discharge is always performed at the “target discharge amount per hour”. Adjust to. By doing so, since the fluctuation of the daily discharge amount from the storage battery attached to the solar power generation device is almost eliminated, the power generation operation (power generation amount) of the solar power generation device is very stable unless the output is suppressed. Is obtained.

  By the way, when a large amount of photovoltaic power generation devices are introduced into the power system, the amount of discharge from the storage battery attached to the photovoltaic power generation device varies greatly due to changes in weather. An example of the variation obtained by the simulation is shown in FIG.

  FIG. 30 is a simulation result of daily and hourly changes in the amount of stored electricity and the amount of discharge in an attached storage battery of a solar power generation device in July of a certain year. According to the graph of the figure, for example, the total power stored in the auxiliary storage battery by the daytime power generation on July 1 is stored in the auxiliary storage battery by the daytime power generation on July 2. The total electric power (amount of stored electricity) is higher, because July 1 was cloudy and July 2 was clear. Thus, it can be seen that the amount of stored electricity per day varies considerably depending on the weather. In addition, the amount of electricity stored on July 1 is discharged evenly during the 24-hour discharge period from 0:00 on July 2 to 0:00 on July 3, and the amount of electricity stored on July 2 is 7 Although it is discharged evenly during the 24-hour discharge period from 0 o'clock on March 3 to 0 o'clock on July 4, the difference in the total amount of electricity stored (cumulative power generation) on July 1 and 2 Accordingly, there is a considerable difference between the discharge amount from July 1 to 2 and the discharge amount from July 2 to 3. Thus, it can also be seen that the amount of daily discharge from the attached storage battery also varies considerably depending on the weather. This difference (fluctuation) in the daily discharge amount is so large as to be equivalent to the total power generation amount of the dozen internal combustion power generation devices, so some countermeasure is required.

  In consideration of this point, in the present invention, the discharge target of the storage battery attached to the photovoltaic power generation apparatus is set and the adjustment storage battery is installed, and the difference between the discharge target and the actual discharge amount is stored and discharged by the adjustment storage battery. By performing “target management” so as to be absorbed by the discharge, fluctuations in the discharge amount are suppressed (stabilized). The change in the total discharge amount in this case is as shown in FIG. 31, for example, and is hardly affected by the weather, and the daily discharge amount can be substantially stabilized. In FIG. 31, the total discharge amount is increasing little by little every 10 days because a discharge target (target power generation amount) is set every month.

  In order to realize “target management”, not only the method of installing the adjustment storage battery directly in the power system, but also operating a pumped-storage power generator connected to the power system, A method of linking with a device can also be used. Specifically, the difference between the discharge target of the auxiliary storage battery of the photovoltaic power generation device and the actual discharge amount is supplied (transmitted) from the adjustment storage battery to the power system / power generation device of another power company (in the case of surplus), On the other hand, it is procured from other electric power company's power system / power generation device to the storage battery for adjustment (in case of shortage). Alternatively, the surplus from the adjustment storage battery is absorbed (preserved) by operating a pumped-storage power generator connected to the power system and pumping water from the lower reservoir (lower pond) to the upper reservoir (upper dam). To do.

(Embodiment of the present invention)
Next, a preferred embodiment of the present invention produced in accordance with the basic principle of the present invention described above will be described in detail with reference to the accompanying drawings.

(Power system configuration)
FIG. 2 is a conceptual diagram showing an overall configuration of a power system in which a power system control system according to an embodiment of the present invention is used. In addition, the control method of the electric power system which concerns on one Embodiment of this invention is performed by this control system.

  In FIG. 2, a power system control system 1 according to the present embodiment is connected to a power system 2a operated and managed by a predetermined power company. The electric power system 2a is a system that delivers electric power generated by various power generation devices (power plants) to a large number of consumers via transmission lines, substations, distribution lines, service lines, etc. It includes various facilities such as offices, distribution lines and service lines. The power system 2a includes a communication network 2b for transmitting and receiving information such as a predetermined control signal and a storage amount between the control system 1 and various power generation devices and storage batteries.

  In this embodiment, as shown in FIG. 2, as a solar power generation device (power plant) installed in the power system 2 a, the industrial solar power configured to supply power to the power system 2 a via the attached storage battery 3. Photovoltaic generator 4, industrial solar power generator 5 configured to supply power system 2 a directly without auxiliary storage battery 3, and power supply system 2 a directly without auxiliary storage battery 3 There is a household solar power generation device 6 configured. However, in addition to these, the electric power system 2a includes a non-solar renewable energy generator (non-solar renewable energy generator) 9a such as a wind generator or a geothermal generator, a thermal power plant, a nuclear power plant, etc. A non-renewable power generation device (non-renewable energy power generation device) 9b, a pumped storage power generation device 10, and a storage battery 8 for adjustment are further installed.

  The non-solar renewable energy power generation device 9a is a power generation device (power plant) using renewable energy other than sunlight such as wind power or geothermal heat. The non-renewable power generation device 9b is a power generation device (power plant) that does not use renewable energy, such as a thermal power plant or a nuclear power plant. The pumped-storage power generator 10 is installed mainly for the purpose of adjusting the power supply / demand balance of the power system 2a by pumping, and can be omitted. The adjustment storage battery 8 is installed to store and discharge for target management, and this can also be omitted.

  The power system 2a is further linked with the power system / power generation device 11 of another power company, and transmits surplus power from the power system 2a to the power system / power generation device 11 of another power company as necessary. On the contrary, the insufficient power can be supplied (procureed) from the power system / power generation apparatus 11 to the power system 2a. Other electric power company power system / power generation device 11 is an electric power system operated and managed by an electric power company (other electric power company) different from the electric power company that operates electric power system 2a, and power generation / distribution installed in the electric power system. And various equipment groups.

  Actually, the industrial solar power generation devices 4 and 5 described above, the home solar power generation device 6, the adjustment storage battery 8, the non-solar renewable energy power generation device 9a, the non-renewable energy generation device 9b, and the pumped storage power generation device 10 are actually used. There are a plurality of other electric power company power systems / power generation devices 11. However, in FIG. 2, only one of each is drawn for the sake of simplicity.

  All the electric power generated every day by the plurality of industrial solar power generation devices 4 is once stored in the corresponding auxiliary storage battery 3 and gradually discharged from the start of operation the next day in a predetermined discharge time zone to the electric power system 2a. To be supplied. In this embodiment, this discharge time zone is set to 24 hours (one day) from 0:00 to 24:00, but is not limited to this. 24 hours is most preferable, but it may be 23 hours, 22 hours, or shorter than 22 hours.

  All of the electric power generated every day by the plurality of industrial solar power generation devices 5 having no attached storage battery is directly supplied (directly sent) to the electric power system 2a. Electric power generated every day by a plurality of household solar power generation devices 6 that do not have an attached storage battery is first consumed as self-consumed power by consumers 7 who own them, and the remaining power is directly (immediately ) It is supplied (directly sent) to the power system 2a. That is, the remaining daily power is sold from the customer 7 to the power company that manages and operates the power system 2a.

  The power storage operation (power generation operation of the solar power generation device 4) to the attached storage battery 3 of the solar power generation device 4 itself and the power generation operation of the solar power generation devices 5 and 6 are not controlled by the control system 1. Only the discharge operation of the auxiliary storage battery 3 of the solar power generation device 4 is controlled by the control system 1.

  Each of the plurality of auxiliary storage batteries 3 is attached to the corresponding industrial solar power generation device 4, and saves (stores) the electric power generated by the corresponding solar power generation device 4 every day, and stores the stored electric power. After the power generation is completed, the battery is uniformly discharged (power is supplied to the power system 2a) in the discharge time zone of 24 hours simultaneously with the start of operation on the next day. The discharge operation (start and stop of discharge, adjustment of discharge amount, etc.) of the auxiliary storage battery 3 is controlled by a control signal sent from the control system 1 via the communication network 2b stretched around the power system 2a. Details of this operation will be described later.

  Storage and discharge of each attached storage battery 3 can be executed regardless of whether or not the corresponding solar power generation device 4 is in a power generation state. For this reason, each solar power generation device 4 can discharge the electric power stored in the auxiliary storage battery 3 simultaneously with storing the generated electric power in the corresponding auxiliary storage battery 3 (see FIG. 19). In addition, the actual amount of power stored in all attached storage batteries 3 is transmitted to the control system 1 as needed via the communication network 2b.

  The plurality of adjustment storage batteries 8 are directly connected to the electric power system 2a and compensate for the difference between the target discharge amount and the actual discharge amount when performing “target management” of the discharge amount of the attached storage battery 3. Used for. That is, the daily power generation amount for each of the solar power generation devices 4 having the attached storage battery 3 is calculated from the past weather results, and the target discharge amount for the entire supply area is set for each month from the power generation amount. When the target power generation amount is larger than the actual power generation amount, a “storage control signal” is sent to the adjustment storage battery 8, and the difference between the target power generation amount and the actual power generation amount (surplus power) is accordingly sent from the power system 2a. It is stored (charged) in the adjustment storage battery 8. On the other hand, when the target discharge amount is not larger than the actual power generation amount, a “discharge control signal” is sent to the adjustment storage battery 8, and the difference between the target power generation amount and the actual power generation amount (insufficient power) is accordingly increased. It is supplied (discharged) from the adjustment value rechargeable battery 8 to the power system 2a. It should be noted that the “target management” can be performed by using another power company's power system / power generation device or pumped storage power generation device without the adjustment storage battery 8.

  Each adjustment storage battery 8 is also configured to be able to simultaneously store and discharge (see FIG. 19), as in the case of the attached storage battery 3, and the actual storage amount per day is via the communication network 2b. Therefore, it is transmitted to the control system 1 as needed.

  The plurality of non-solar renewable power generation devices 9a are power generation devices (power plants) that use renewable energy other than sunlight, such as wind power generation devices and geothermal power generation devices. And is controlled by the control system 1 during operation. All of the electric power generated by the plurality of non-solar photovoltaic power generation devices 9a is supplied directly (immediately after power generation) to the electric power system 2a.

  The plurality of non-renewable power generation devices 9b are power generation devices (power plants) that use energy other than renewable energy, such as thermal power plants and nuclear power plants. Built in. The operation state of the non-renewable power generation device 9b is controlled by the control system 1 in accordance with the operation plan. All the electric power generated by the plurality of non-solar power generation devices 9b is supplied directly (immediately after power generation) to the electric power system 2a.

  In this embodiment, the amount of discharge per hour of the attached storage battery 3 of all the solar power generation devices 4, the amount of power generation per hour by all the solar power generation devices 5 and 6, and all the non-solar solar power generation devices 9a Priority is given to the amount of power generated per hour. The difference between the total discharge amount / power generation amount per day of these power generation devices 4, 5, 6, 9a and the demand amount per hour per day is calculated for all non-renewable power generation devices 9b (thermal power generation). To cover (compensate for) the amount of power generated by the power plant and nuclear power plant. Therefore, an operation plan is created and executed for each of all the non-renewable power generation devices 9b so as to compensate for the difference.

  The plurality of pumped storage power generators 10 are connected to the control system 1 via the communication network 2b. Each pumped-storage power generator 10 generates surplus by pumping water from the lower reservoir (lower pond) to the upper reservoir (upper dam) with the surplus power when the total actual power generation amount in the electric power system 2a becomes larger than the demand amount. It is provided to convert (absorb) (preserve) electricity into dam water. On the other hand, when the total actual power generation amount in the power system 2a is smaller than the demand amount, the insufficient power can be compensated by falling from the upper reservoir to the lower reservoir. Thus, by using the pumped-storage power generator 10, the adjustable range is limited, but it is possible to adjust power supply and demand.

  A plurality of other electric power company power systems / power generation devices 11 are also connected to the control system 1 via the communication network 2b. The other power company power system / power generation device 11 is operated by another power company that cooperates with the power company that operates the power system 2a, and operates in cooperation with the power system 2a as necessary. . The electric power generated by the electric power system / power generation device 11 of another electric power company is supplied to the electric power system 2a as necessary and used to make up for the insufficient electric power of the electric power system 2a. Conversely, when there is surplus power in the power system 2 a, the surplus power is transmitted toward the other power company power system / power generation device 11. In this way, it is possible to adjust the supply and demand of electric power in the electric power system 2a also by using the electric power system / power generation device 11 of another electric power company.

(Control system configuration)
Next, the configuration of the control system 1 provided for controlling the power system 2a having the above configuration will be described with reference to FIGS.

  As shown in FIG. 3, the control system 1 includes a power generation amount prediction unit 14, an operation plan creation unit 15, an operation plan storage unit 16, a power system control unit 17, a power generation amount prediction storage unit 18, a power storage result collection / discharge unit calculation. A unit 19, a discharge amount storage unit 21, a daily total storage unit 22, a storage battery control unit 23, and an offline work unit 24 are provided. The storage battery control unit 23 includes a discharge control unit 23a, an adjustment storage battery control unit 23b, and a discharge amount adjustment unit 23c. The offline working unit 24 includes a discharge target setting unit 24a, a demand prediction unit 24b, and a non-solar renewable energy generation prediction unit 24c.

  As shown in FIG. 5, the control system 1 further includes a photovoltaic power generation information storage unit 25, a discharge target storage unit 26, a demand prediction storage unit 27, and a non-sunlight renewable energy prediction storage unit 28.

  The power generation amount prediction unit 14 calculates the amount of power generation per hour for each solar power generation device (solar power plant) 4, 5, 6 and the non-solar renewable power generation device 9a installed in the power system 2a. This is a section that makes predictions. For the solar power generation devices 4, 5, and 6, on an arbitrary predicted date, necessary weather information is fetched from the weather forecast on the next day and the next day of the prediction date, and the time of the next day and the next day of each solar power generation device 4 The amount of power per unit of discharge and the amount of power generated per hour of the next day and the next day of each of the solar power generation devices 5 and 6 are predicted. The predicted discharge amount per hour of each solar power generation device 4 obtained by this prediction and the predicted power generation amount per hour of each solar power generation device 5, 6 are stored in the power generation amount prediction storage unit 18. The necessary weather forecast is obtained from the weather forecast provider 12 via the Internet 13.

  The power generation amount prediction of the non-solar renewable energy power generation device 9a (for example, a wind power generation device) is performed by a known method. The predicted power generation amount per hour for the next day and the next day of all the non-solar renewable energy generators 9a is acquired from outside and stored in the power generation amount prediction storage unit 18 on or before the prediction date.

  In the operation plan creation unit 15, the sum of the predicted discharge / power generation amount per day of all the solar power generation devices 4, 5, 6 and the non-solar renewable energy power generation device 9a installed in the power system 2a, and the daily An operation plan for compensating for (differing) the difference between the estimated demand per hour and the power generation per hour of all non-renewable power generation devices 9b (thermal power plant and nuclear power plant) by a known method This section is created in If the difference is known, an operation plan can be easily created by calculating the power generation amount per hour of each non-renewable power generation device 9b using a known method. The operation plan created by the operation plan creation unit 15 is stored in the operation plan storage unit 16.

  For example, the difference is calculated as follows. On an arbitrary forecast date, the total value of the actual discharge amount per hour on the next day of the forecast storage battery 3 of all the solar power generation devices 4 and the predicted power generation amount per hour on the next day of all the solar power generation devices 5 And the total value of the predicted power generation amount per hour for the next day of all the non-solar renewable energy power generation devices 9a, and the total value is added to calculate the predicted power supply amount per total time. Then, the predicted power supply amount per hour on the next day obtained in this way is compared with the predicted demand amount per hour on the next day, and the difference between the two is calculated. The operation plan for the next day compensates for the difference between the predicted power supply amount per hour for the next day and the predicted demand amount per hour for the next day with the power generation amount per hour of all non-renewable power generation devices 9b. In other words, it is created so as to maintain a balance between power supply and demand.

  In the operation plan for the next day after the forecast date, the total value of the predicted discharge amount per hour on the second day after the forecast date of the attached storage battery 3 of all the solar power generation devices 4 is replaced with the total value of the actual discharge amount per hour on the same day. It is created in the same way as the operation plan for the next day, except that it is used differently.

  The operation plan in the present embodiment is a program that describes the operation of all the non-renewable power generation devices 9b in time series. This program is designed to enable all non-renewable power generation devices 9b installed in the power system 2a to start, stop, stand by, etc. when necessary at the time of execution of the operation plan. The apparatus 9b is controlled.

  The operation plan storage unit 16 is a section that stores the operation plan created by the operation plan creation unit 15. As the operation plan storage unit 16, for example, a known data storage device such as a hard disk can be used.

  The power system control unit 17 is a section that executes the operation plan stored in the operation plan storage unit 16. The power system control unit 17 sends a power system control signal to the power system 2a via the communication network 2b based on the operation plan, and the power system 2a (specifically, the non-renewable power generation device 9b and the pumped storage power generation device). 10 and the operation of the power system / power generation device 11 of another electric power company). In addition, control of the auxiliary storage battery 3 and the adjustment storage battery 8 of the solar power generation device 4 is performed by a storage battery control unit 23 described later.

  The power generation amount prediction storage unit 18 is a section for storing the predicted power generation amount per hour and the predicted discharge amount per hour or the actual discharge amount per time of the solar power generation devices 4, 5, 6 predicted by the power generation amount prediction unit 14. . As the power generation amount prediction storage unit 18, for example, a known data storage device such as a hard disk can be used. The predicted power generation amount per hour and the like are stored, for example, in the form of the discharge amount table in FIG. 13A and the power generation amount prediction tables 1 and 2 in FIGS. 13B and 13C.

  The three types of tables in FIG. 13 merely represent the basic table in FIG. 12 in another form. Since a considerable amount of technology is required to handle the table of FIG. 12 in terms of computer processing, there exists a method that makes it appear that the table of FIG. 13 exists. In the following description, description will be made using the tables shown in FIGS.

  The power storage result collection / discharge unit calculation unit 19 collected and collected the actual power storage amount of the attached storage batteries 3 of all the industrial solar power generation devices 4 via the communication network 2b before creating the operation plan. This is a section for calculating the actual discharge unit (actual discharge amount per hour) for each attached storage battery 3 from the actual storage amount.

  The discharge amount storage unit 21 is a section that stores the discharge amount per hour for each storage battery 3 calculated by the power storage record collection / discharge unit calculation unit 19. For example, a known data storage device such as a hard disk can be used as the discharge amount storage unit 21. The discharge amount is stored, for example, in the form of a discharge amount table in FIG.

  The daily total storage unit 22 is a time for all devices installed in the power system 2a, that is, the solar power generation devices 4, 5, and 6, the non-solar renewable energy power generation device 9a, and the adjustment storage battery 8. This section stores daily aggregated data that aggregates the predicted power generation, discharge, and storage amount per hour. As the daily total storage unit 22, for example, a known data storage device such as a hard disk can be used. The daily total data of the predicted power generation amount is stored, for example, in the form of the daily table of predicted power generation amount in FIG.

  The storage battery control unit 23 is a section that controls the auxiliary storage battery 3 and the adjustment storage battery 8 of the solar power generation device 4, and includes a discharge control unit 23a, an adjustment storage battery control unit 23b, and a discharge amount adjustment unit 23c. .

  The discharge control unit 23a is a section that controls the discharge of the auxiliary storage battery 3 of the solar power generation device 4, and starts and stops the discharge of the auxiliary storage battery 3, adjusts the discharge amount, and the like.

  The adjustment storage battery control unit 23b is a section for controlling the storage and discharge of the adjustment storage battery 8, and performs the discharge or start and stop of the adjustment storage battery 8, adjustment of the discharge amount or the storage amount, and the like.

  The discharge amount adjusting unit 23c is a section that monitors the predicted demand amount per hour and the scheduled discharge amount per hour at a certain time point during execution of the operation plan, and adjusts as necessary, that is, checks the power supply / demand balance. It is. In this adjustment, the discharge unit (discharge amount per hour) for each attached storage battery 3 calculated by the power storage record collection / discharge unit calculation unit 19 is used. The discharge amount adjusting unit 23 c is also used for target management of the discharge amount of the auxiliary storage battery 3.

  The offline work unit 24 is a section that performs work independent of the real-time control processing performed by the power system control unit 17, and includes a discharge target setting unit 24 a, a demand prediction unit 24 b, and a non-solar renewable energy generation prediction unit 24 c. Have.

  The discharge target setting unit 24a is a section that sets a discharge target for each month of the entire power supply from the predicted annual power generation amount of all the attached storage batteries 3. The discharge target set by the discharge target setting unit 24 a is stored in the discharge target storage unit 26. This discharge target is used for target management.

  The demand prediction unit 24b predicts the power demand per hour for each day. This demand forecast is created by a conventionally known method. The created demand prediction is stored in the demand prediction storage unit 27.

  The non-solar renewable power generation prediction unit 24c is a section that predicts the amount of power generated per hour for power generation other than the solar power generation apparatuses 4, 5, and 6, mainly wind power generation. This prediction may be performed by a conventionally known method. The created non-solar renewable energy prediction is stored in the non-solar renewable energy prediction storage unit 28.

  The solar power generation information storage unit 25 is a section that stores information relating to each of the solar power generation devices 4, 5, and 6. As the photovoltaic power generation information storage unit 25, for example, a known data storage device such as a hard disk can be used. The solar power generation information is stored in a format such as a power plant basic information table, a roof basic information table, a discharge amount basic information table, and a power generation amount prediction basic information table in FIG.

  The discharge target storage unit 26 stores the target discharge amount for each month in the entire set power supply area. A known data storage device such as a hard disk can be used. The discharge target (target discharge amount) is stored, for example, in the form of a discharge target table in FIG.

  As the demand prediction storage unit 27, for example, a known data storage device such as a hard disk can be used. The demand forecast is stored, for example, every 5 minutes in the format of the demand amount column of the demand forecast table in FIG.

  As the non-sunlight renewable energy prediction storage unit 28, for example, a known data storage device such as a hard disk can be used.

(Control system operation)
Next, the operation of the control system 1 described above will be described with reference to FIGS. 5 and 6.

  The operation of the control system 1 is roughly divided into six steps as shown in FIG. That is, preparation (step R01), power generation amount prediction (step R02), collection of power storage results and discharge unit calculation (step R03), operation plan creation (step R04), operation plan execution (step R05), and Implementation and adjustment of discharge (step R06). The control system 1 creates a discharge target on an arbitrary day before the forecast date (step R01). On the forecast date, the power generation amount (for the next day and the next day) is forecast (step R02), and the power storage performance on the forecast day is calculated. Three steps of collection and discharge unit calculation (step R03) and creation of operation plan (next day and next day) are executed, and the next day (0:00 am), the next day's operation plan is executed. (Step R05) and the implementation and adjustment (Step R06) of the discharge are started. The power system control unit 17 performs the solar power generation devices 4, 5, 6, the non-solar renewable energy power generation device 9 a, and the non-restart so that the voltage and frequency are always maintained within a predetermined range on the day after the prediction date. The power system 2a including the energy generator 9b is controlled.

  Hereinafter, the above six steps will be described in order.

(A) Preparation (Step R01)
In the preparation step, the “average amount of power generation” throughout the year is calculated for each industrial solar power generation device 4 having the attached storage battery 3 on a daily basis. The calculation is performed on an arbitrary date until the day before the solar power generation device 4 starts operation. It is necessary to add a discharge target for the newly installed auxiliary battery before the newly installed storage battery operates in the power supply area. This is performed by the discharge target setting unit 24a of the offline working unit 24. This average power generation amount is used as a “discharge target” of the solar power generation device 4 having the attached storage battery 3. For all industrial solar power generation devices 5 and home solar power generation devices 6 that do not have the attached storage battery 3, the average power generation amount is not calculated. This is because the solar power generation devices 5 and 6 are not discharged from the storage battery.

  “Discharge target” for every industrial solar power generation device 4 having the attached storage battery 3, that is, “average power generation amount” is a target discharge amount per hour from the storage battery 3 (target power supply amount per hour for the power system 2a). It is used for “target management” described later. The discharge target setting by the discharge target setting unit 24a is performed by the method shown in FIG.

  In the discharge target creation flow of FIG. 7, first, for all photovoltaic power generation devices 4 having attached storage batteries 3, considering the power generation characteristics for each device 4, the past weather station at the nearest weather station at the device installation location for the past year. From the weather results, the power generation amount for 365 days is predicted for each device by day (step T01). In the prediction, the methods and techniques described in Patent Document 6 (Patent No. 4848051) and Patent Document 7 (Patent No. 5308560) which are patents of the applicant of the present application are used. Is preferred. Patent Document 6 discloses “a method for calculating the sunshine ratio, its system, and its program” that can calculate the sunshine ratio in more detail. In Patent Document 7, it is possible to accurately predict the power generation amount in solar power generation for each solar power generation device and for each time zone without actually measuring the sunshine intensity (irradiation amount), temperature, and power generation amount in real time. A “power generation amount prediction method and apparatus for solar power generation” is disclosed. By using the methods and techniques described in both documents, it is possible to calculate the predicted power generation amount for 365 days with high accuracy by day. However, it goes without saying that methods and techniques other than those described in Patent Documents 6 and 7 can be used as long as the estimated power generation amount for 365 days can be calculated with high accuracy.

  Next, the total value of all the solar power generation devices 4 is calculated for each day using the estimated power generation amount for 365 days calculated for each solar power generation device 4 in step T01. Then, the daily average power generation is calculated for each month from the daily total value (step T02). Here, “by season” means to calculate by dividing into early (1st to 10th), middle (11th to 20th), and late (21st to the end of the month). Therefore, as shown in FIG. 25, the calculated monthly average power generation amount is 36 pieces of data for one electric power company in one year.

  Next, the monthly average daily power generation amount (36 pieces of data) generated in step T02 is leveled (step T03). This is because the 36 pieces of data generated in step T02 have considerably large variations as shown in the monthly power generation amount graph of FIG. When leveling, a known appropriate method such as fitting an approximate expression may be selected and used.

  Next, the storage loss / discharge loss is applied to the monthly average daily power generation leveled in step T03 and further divided by (24 × 12) to obtain the “discharge amount per hour” at intervals of 5 minutes. The time is calculated (step T04). At this time, when the discharge amount changes with the passage of time or the change of the remaining amount, the discharge amount per hour corresponding to the change is calculated.

  Finally, the “discharge amount per hour” generated in step T04 is stored in the discharge target table of FIG. 16 for each month (step T05). The total value of the “discharge amount per hour” of all the attached storage batteries 3 becomes the “target discharge amount per hour”, that is, “discharge target” of one electric power company that performs power system control.

(B) Prediction of demand and power generation (step R02)
In order to create an operation plan, it is necessary to predict the amount of power demand for each hour in advance. This prediction is performed by a known method by the demand prediction unit 24b of the offline working unit 24 before creating a daily operation plan throughout the year. The predicted demand amount for each hour thus obtained is stored in the demand prediction storage unit 27 as the predicted demand amount every 5 minutes in the format of the demand prediction table of FIG.

  Moreover, the prediction of the amount of power generation is based on the industrial solar power generation device 4 with all the attached storage batteries 3, the industrial solar power generation device 5 without all the storage batteries, and the household solar power generation device 6 without all the storage batteries. Done about. Specifically, as shown in FIG. 3 and FIG. 5, the weather forecast for the next day and the day after next in the area where the solar power generation devices 4, 5, 6 are installed via the Internet 13 at noon on the forecast day. get. Based on the weather information, the amount of power generated by all the photovoltaic power generation devices 4, 5, and 6 on the next day and the next day of the prediction date is predicted for each device. This prediction is executed by the power generation amount prediction unit 14. The predicted power generation amount per hour for each of the photovoltaic power generation devices 4, 5, 6 obtained by this prediction is stored in the power generation amount prediction storage unit 18 in the form of the discharge amount table or the power generation amount prediction tables 1 and 2 in FIG. Saved.

  The predicted power generation amount per hour of all the non-solar solar power generation devices 9a is obtained from the outside by using a known method. The acquired predicted power generation amount is stored in the non-solar light renewable energy prediction storage unit 28.

  As for the industrial solar power generation device 4 with the storage battery 3, all of the daily power generation amount (cumulative power generation amount) is once stored in the attached storage battery 3, and then discharged over one day (about 24 hours). Since power is supplied to the system 2a, the “predicted discharge amount per hour” from the auxiliary storage battery 3 is also predicted every day. Further, the amount actually stored in the auxiliary storage battery 3 by the accumulated power generation amount per day, that is, the actual power storage amount stored on the prediction date is measured by an appropriate sensor and obtained after the end of power generation via the communication network 2b. Then, the “actual discharge amount per hour” is calculated from the actual storage amount, and the “actual discharge amount” is used as the discharge amount on the next day. Since the operation plan for the next day is not yet obtained, the operation plan is created using the “predicted discharge amount per hour” calculated from the power generation amount prediction.

  The calculated “predicted discharge amount per hour” and “actual discharge amount per hour” are stored in the power generation amount prediction storage unit 18 in the form of a discharge amount table shown in FIG. In this embodiment, the “predicted discharge amount per hour” and the “real discharge amount per hour” are calculated at 5-minute intervals.

  For the industrial solar power generation device 5 without a storage battery, all of the accumulated power generation per day is supplied to the power system 2a immediately after power generation (directly sent), so the daily power generation prediction by the solar power generation device 5 Use as is. The prediction results are output as an upper limit value, an intermediate value, and a lower limit value, and the intermediate value is used for creating an operation plan. The upper and lower limits are used for various checks. The “predicted power generation amount per hour” obtained on the next day and the day after next is stored in the power generation amount prediction storage unit 18 in the form of the power generation amount prediction table 1 of FIG. 13B, for example. In the present embodiment, the “predicted power generation amount per hour” is stored by being divided into an upper limit value, an intermediate value, and a lower limit value.

  As for the solar power generation device 6 for home use without a storage battery, the consumer 7 uses part of the accumulated power generation amount of the day, and only the surplus is fed to the power system 2a (directly sent). The amount of power generation is predicted by predicting the daily surplus generation by the home solar power generation device 6. The “predicted power generation amount per hour” obtained on the next day and the day after next is stored in the power generation amount prediction storage unit 18 in the form of the power generation amount prediction table 2 in FIG. In the present embodiment, the data is stored separately as “predicted power generation per hour”, “predicted consumption per hour”, and “predicted power sales per hour”.

  In addition, since said electric power generation amount prediction is performed for every solar power generation device 4,5,6, in that case, individual solar power generation devices, such as a power plant number, a power plant type, an address, a weather forecast area, are shown. Basic information on solar power plants 4, 5, and 6 is required. These solar power plant basic information is, for example, in a format such as a power plant basic information table, a roof basic information table, a discharge basic information table, and a power generation amount prediction basic information table as shown in FIG. Since it is collectively stored in the solar power generation information storage unit 25 (see FIG. 5), it is read from the solar power generation information storage unit 25 and used as necessary.

  By the way, in order to increase the accuracy of the power generation amount prediction, a highly accurate weather forecast is necessary. Therefore, the weather forecast is divided into regions as small as possible, and the latest forecast as much as possible is good. As shown in FIG. 21, the weather forecast of the Japan Meteorological Association is divided into 11 districts from Hokkaido to Okinawa, 1954 locations nationwide, and 250 locations in the Kyushu district alone. Therefore, a corresponding one of these weather forecast districts is selected, and the code is registered in “weather forecast district” of the power plant basic information table of FIG.

  When obtaining the weather forecast for the corresponding district, for example, the forecast date is obtained from the weather forecast provider 12 via the Internet 13 using the “weather forecast district” in the power plant basic information table of FIG. 12 as a key. Get the weather forecast for the next day and the day after next. In general, the weather forecast is displayed only for the current day and the next day, but it is necessary to obtain a weather forecast for the next day in advance by consulting with the weather forecast provider 12 in advance. This is easily feasible because the weather forecaster 12 predicts up to a week ahead. Weather forecasts are usually announced three times a day at 6 am, 11 am and 5 pm (17:00). Since the operation plan of the power system 2a (for the next day and the next day) is created when the power generation by the solar power generation devices 4, 5, and 6 on the prediction day is completed and after the power generation amount prediction is completed, Will be created around 5-6pm. Therefore, the weather forecast announced at 11:00 am should be used.

  Based on the weather information acquired from the weather forecast announced on the forecast date, when the power generation amount of the next day and the next day is predicted, the acquired weather information is every 3 hours, so the hourly weather information It is necessary to correct it. In addition, since the power generation amount in the power generation amount prediction is calculated in increments of 1 minute, the desired prediction is made in any of 5 minutes, 10 minutes, 20 minutes, 30 minutes, and 60 minutes according to the purpose of use. A value can be output. FIG. 26 shows an example of the prediction result when weather information is received every 60 minutes. FIG. 27 shows a graph of the prediction result of FIG.

  The details of the method for obtaining the power generation amount prediction result shown in FIG. 26 and FIG. 27 are patents 6 (Patent No. 4848051) and Patent Reference 7 (Patent No. 5308560) which are patents owned by the applicant of the present application. The description is omitted here. Note that it goes without saying that known methods other than those described in Patent Document 6 and Patent Document 7 may be used as a method for obtaining the power generation amount prediction results of FIGS. 26 and 27.

  As shown in FIG. 28, according to the prediction methods of Patent Document 6 and Patent Document 7, the prediction accuracy of the power generation amount based on the past weather performance is 94.7%, and can be predicted with very high accuracy. I understand.

  In order to accurately predict the power generation amount of the household solar power generation device 6 with self-consumption, the self-consumption amount must be predicted. Patent Document 8 (Patent No. 4679670) relating to a patent owned by the applicant of the present application describes a method for predicting hourly electricity usage by weekday / holiday and by season through an analysis of the use of domestic electrical equipment. Therefore, this method may be adopted. In the self-consumption prediction method disclosed in Patent Document 8, the prediction accuracy is high because the prediction is performed so as to match the actual monthly electricity consumption (kWh) in the home. An example is shown in FIG. FIG. 29A is a graph of power generation, power generation and consumption, and power sales, and FIG. 29B is original data of these graphs. The amount of power sold by subtracting the amount of power consumption from the amount of power generation is used as the predicted power generation amount of the home solar power generation device 6. Correspondingly, the power generation amount prediction table 2 in FIG. 13C is provided with a column for storing the predicted power generation amount, the predicted consumption amount, and the predicted power sale amount, and a column for storing the total value of the power sale amount. Yes.

  Each household needs cooperation to predict self-consumption. For example, each household's personal computer can analyze their own electricity usage, and as a consideration for the cooperation, the daily power sales forecast It is preferable to be able to peek at. If household cooperation cannot be obtained, the average usage of the average household may be used.

  In the case of industrial solar power generators 4 and 5 without self-consumption, it takes about 24 hours after storing in the attached storage battery 3 and the type that immediately supplies the generated power to the power system 2a (industrial solar power generator 5). There are two types of discharge (industrial solar power generation device 4), but these have a large output and have a great influence on the power system 2a. Therefore, as shown in FIGS. 26 and 27, the predicted power generation amount for the solar power generation apparatus 5 that is directly fed is generated by generating three values, that is, an upper limit value, an intermediate value, and a lower limit value. Is made to have a width. In calculating the predicted power generation amount of the solar power generation device 5, the intermediate value is used, and the storage loss rate and the discharge loss rate are also taken into consideration. Correspondingly, the power generation amount prediction table 1 in FIG. 13B is provided with a column for storing the upper limit value, intermediate value, and lower limit value of the predicted power generation amount and a column for storing the total value of the intermediate values. ing. For the solar power generation device 4 that transmits power to the attached storage battery 3 after power storage, the estimated discharge amount and the actual discharge amount are calculated hourly over 24 hours. Accordingly, in the discharge amount table of FIG. A column for storing the predicted discharge amount or the actual discharge amount for 24 hours and a column for storing the total value of the predicted discharge amount and the actual discharge amount are provided.

  As described above, the various tables shown in FIGS. 12 and 13 are used for the power generation amount prediction, and a description thereof will be supplemented here.

  FIG. 12 shows a configuration of a power plant basic information table, a roof basic information table, a discharge basic information table, and a power generation prediction basic information table used in the power generation prediction unit 14. (These are stored in the solar power generation information storage unit 25.) In these four tables, in addition to the power plant number assigned to each of the solar power generation devices 4, 5, and 6, the power plant type, installation Since the information related to the position (address), the date of power generation, and the like is stored, all the unique information of the solar power generation devices 4, 5, and 6 can be stored. In this embodiment, the industrial solar power generation device 4 having the storage battery 3, the industrial solar power generation device 5 without the storage battery 3, the household solar power generation device 6, and the adjustment storage battery 8 are installed in the power system 2 a. Therefore, the unique information regarding these is stored in the power plant basic information table.

  The power plant basic information table is a table that stores basic information related to the solar power generation devices 4, 5, and 6 (solar power plant), but the basic information related to the adjustment storage battery 8 is also stored together. As shown in FIG. 12, in addition to the unique power plant number, the power plant basic information table includes the power plant type, the installed address, the weather forecast district, the customer number of the power company, information about the photovoltaic power generation panel, the storage battery Data items such as presence / absence of storage, collection amount start time, discharge start time, storage capacity, storage loss rate, discharge loss rate (discharge characteristics) are included, and therefore these data are stored in the same table. .

  The installed address is displayed in latitude and longitude. From the name of the power company of the connected power system and the customer number assigned to the power generation device (power plant) attached by the power company, which solar power generation device 4, 5, 6 or adjustment storage battery 8 is from which power company You can see if it is connected to the power yarn 2a at the place. The power generation efficiency can be calculated from the manufacturer and model number of the solar panel.

  There are four types of power plant types: 1 for home use (with self-consumption), 2 for industrial use (with storage battery), 3 for industrial use (without storage battery), and 4 for adjustment storage battery (without power generation). Yes. Therefore, the power plant type of the industrial solar power generation device 4 provided with the storage battery 3 is 2, the power plant type of the industrial solar power generation device 5 without the storage battery 3 is 3, and the power generation of the home solar power generation device 6 The plant type is 1, and the power plant type of the adjustment rechargeable battery 8 is 4.

  The data of each data item when the power plant number is a specific value, for example, “000000” means the total value of all the solar power generation devices 4, 5, 6 (solar power plant).

  The basic roof information table is a table that stores basic information related to the roof on which the photovoltaic power generation panel is installed. The roof basic information table has data items such as the number of panels, the maximum output, the direction of the roof, and the angle of the roof for each roof on which the photovoltaic power generation panels are installed, and stores information related to these. The number of roofs is unlimited.

  The discharge amount basic information table is a table that stores basic information related to the scheduled discharge amount per hour and the actual discharge amount from the auxiliary storage battery 3. The discharge amount basic information table includes the date of power generation, the scheduled / actual total value of discharge (the total value of the scheduled discharge amount per hour and the actual discharge amount per hour), and the discharge amount every 5 minutes over about 24 hours (planned per hour) Data item of discharge amount or actual discharge amount per hour), and data related to these are stored.

The power generation amount prediction basic information table is a table that stores basic information related to power generation amount prediction. Here, there are data items such as the power generation date, the upper limit, the middle, and the lower limit predicted power generation amount, and data relating to these are stored.
FIG. 13 shows a configuration of a discharge amount table, a power generation amount prediction table 1 and a power generation amount prediction table 2 created by combining the four tables of FIG.

  The discharge amount table of FIG. 13A is created only when the auxiliary storage battery 3 is charged, that is, only for the industrial solar power generation device 4 (power plant type = 2) provided with the auxiliary storage battery 3. In the discharge amount table, the “predicted discharge amount per hour” calculated from the predicted power generation amount is stored until the storage results of the attached storage battery 3 are collected and the discharge unit (actual discharge amount per hour) is calculated. After that, the discharge unit calculated from the power storage record, that is, the “actual discharge amount per hour” is stored. The scheduled discharge amount and the actual discharge amount are stored for each power generation date and time (every 5 minutes).

  The power generation amount prediction table 1 in FIG. 13B stores the power generation amount prediction results of the industrial solar power generation devices 4 and 5. Since the predicted power generation amount is discharged for the industrial solar power generation device 4, after calculating the discharge amount, it is also stored in the discharge amount table on the next date. As for the predicted power generation, the upper limit, lower limit and intermediate value are stored by generation date and hour. The total value of the expected power generation is also stored.

  The power generation amount prediction table 2 in FIG. 13 (c) has no attached storage battery 3, the generated power is directly supplied to the power system 2a, and the home solar power generation device 6 (power plant type = Created only for 1). This is because the surplus (the amount of power sold), which is the difference between the power generation amount and the self-consumption amount, becomes the power generation amount supplied to the power system 2a. In the home prediction table, the amount of power generation, the amount of consumption, and the amount of power sales are stored by the date of power generation and by time. The total amount of electricity sold is also stored.

(C) Collection of storage results and calculation of discharge unit (step R03)
The process of collecting the storage results and calculating the discharge unit is performed as shown in FIG. FIG. 9 is a flowchart showing a process of collecting power storage results and calculating discharge units.

  First, one of all the attached storage batteries 3 connected to the electric power system 2a is selected, and for the first attached storage battery 3, the attached storage battery 3 on that day is determined at a predetermined time after the end of power generation on the next day of the prediction date. The actual power storage amount (actual power storage amount) is measured and taken in as “power storage performance” (step P01).

  Next, it is determined whether or not power storage results have been collected from all the attached storage batteries 3 connected to the power system 2a (step P02). If it is determined that all have been collected, the process proceeds to step P06, but since not all have been collected here, the process proceeds to step P03.

  In Step P03, the storage loss rate and the discharge loss rate of the auxiliary storage battery 3 stored in the power plant basic information table (see FIG. 12) are applied to the storage results captured for each auxiliary storage battery 3, and the following formula is applied. 3 is used to calculate the “actual discharge amount per hour” (discharge unit) that can be discharged in a discharge time zone of 24 hours (step P03).

Actual discharge amount per hour (discharge amount for 5 minutes) =
(Accumulation result−Storage loss amount−Discharge loss amount−Preliminary storage amount) ÷ (24 × 12) (Formula 3)
The reason for dividing by (24 × 12) in Equation 3 is that the discharge from the attached storage battery 3 is performed at intervals of 5 minutes during the 24 hours from the designated time on the next day. The amount of reserve storage is to leave a small amount in order to prevent the amount of discharge suddenly decreasing when the remaining amount decreases as a storage battery characteristic.

  Some storage batteries have characteristics that change the amount of loss as time passes or changes in the remaining amount. Needless to say, when calculating “actual discharge per hour”, the calculation should also incorporate that characteristic. .

  Next, the “actual discharge amount per hour” (discharge unit) calculated in this way is stored for 24 hours in the “discharge amount by hour” column of the discharge amount table of FIG. At this time, the “actual discharge amount per hour” is stored in the discharge amount table in the 24-hour period from the start of discharge (0:00 am) to the end of discharge on the next day of the prediction date. Until the “actual discharge amount per hour” calculated in step P03 is stored, the “predicted discharge amount per hour” calculated on the prediction date is stored in the same column. "Predicted discharge amount per hit" is updated (overwritten) with "Actual discharge amount per hour" (step P04).

  Next, the discharge amount table updated (overwritten) with the actual discharge amount per time in step P04 is overwritten and stored in the discharge amount storage unit 21 (step P05).

  Then, it returns to step P01, the 2nd attachment storage battery 3 made into object is selected, and step P01-P05 is performed again about the attachment storage battery 3. FIG.

  Thereafter, similarly, Steps P01 to P05 are repeated until the collection of the power storage results and the calculation of the discharge unit are completed for all the attached storage batteries 3 connected to the power system 2a. When the collection of the storage results and the calculation of the discharge unit for the last attached storage battery 3 are completed, it is determined in step P02 that the collection of the storage results is complete, so the process proceeds to step P06, and the “actual discharge amount per hour” of all the attached storage batteries 3 Are totaled according to the time from the start of discharge to the end time of discharge, and stored in the discharge amount table of FIG. The column for storing the “total value of actual discharge amount per hour” (actual discharge amount total value) is the “plan / actual total value” column in which the power plant number column of the discharge amount table is “00000”. After saving, the process of collecting the power storage results and calculating the discharge unit is completed.

  Here, how the stored data in the discharge amount table in FIG. 13 (a) and the power generation amount prediction tables 1 and 2 in FIGS. 13 (b) and 13 (c) change due to the above-described power storage record collection / discharge unit calculation process. This will be described in more detail with reference to FIG.

  FIG. 17 shows changes in the stored data of the discharge amount table and the power generation amount prediction tables 1 and 2 shown in FIG. 13 from before the power generation amount prediction to after the completion of the prediction, and after the completion of the power generation amount prediction, The change until after the discharge amount is determined is schematically shown.

  Here, with respect to the solar power generation device 4 having the attached storage battery 3, the power generation amount on the next day, that is, m month (n + 1), and the next day, that is, m month (n + 2) is predicted on m day and month n (predicted date). Assume that.

  In this case, before the power generation amount prediction on m month n (prediction date), the n day cell and (n + 1) day cell of the power generation prediction table 1 are the previous day of m month n (prediction date), that is, m month ( The “predicted power generation amount per hour” of the nth day and the (n + 1) th day, which are predicted on the (n−1) day, are stored. In addition, the cell groups of day n, (n + 1) day, and (n + 2) day in the discharge amount table are respectively “actual discharge amount per hour” on day (n−1) and “predicted discharge amount per hour” on day n. ”And“ n + 1) day “predicted discharge amount per hour” are stored.

  When the power generation amount prediction of the solar power generation device 4 having the attached storage battery 3 is performed on the nth (predicted date), the “predicted power generation per hour” on the next day (n + 1) and the next day (n + 2). Amount "is calculated. At the end of the power generation prediction, the (n + 1) day cell of the power generation amount prediction table 1 is overwritten and saved (updated) with the “predicted power generation amount per hour” of the (n + 1) day cell. ) The “predicted power generation amount per hour” for the calculated (n + 2) day is newly added to the day cell. The data of the n-day cell in the table is not changed.

  At this time, in the discharge amount table, the data of the cell group on day n and (n + 1) is unchanged, but the cell on (n + 2) day is updated with the “predicted discharge amount per hour” on (n + 1) day. In the (n + 3) day cell, the “predicted discharge amount per hour” of the calculated (n + 2) day is newly added.

  When the collection of the power storage results and the calculation of the discharge unit are completed after the power generation for n days (predicted date) is completed, the “actual discharge amount per hour” is determined for n days. At this time, the data of the n-day cell, (n + 1) cell, and (n + 2) day cell of the power generation amount prediction tables 1 and 2 are not changed. Regarding the discharge amount table, the data of the cell group of n days, (n + 2) days, and (n + 3) days is unchanged, but the “predicted discharge amount per hour” of the (n + 1) day cell is (n + 1) days, It is overwritten and saved (updated) with “actual discharge amount per hour” for n days.

  As described above, when the “actual discharge amount per hour” for n days (predicted date) is determined, the “predicted discharge amount per hour” in the n day cell of the discharge amount table is changed to “ Since “real discharge amount per hour” is overwritten, the actual accumulated power generation amount of the solar power generation device 4 on the nth day is surely “time” corresponding to the actual accumulated power generation amount in the 24 hour time zone on the (n + 1) th day. It is possible to discharge gradually with the “per actual discharge amount”.

  The data of the power generation amount prediction table 1 and the discharge amount table generated in this way is transferred to the operation plan creation unit 14 and used for creation of the operation plan. At this time, the data passed to the operation plan creation unit 14 is as follows.

  (A) In the case of no target management, when creating an operation plan for the next day (n + 1 day) on the predicted date (n day), the total value (actual discharge) of all attached storage batteries 3 of the actual discharge amount for n days in the discharge amount table (Total amount) is passed to the operation plan creation unit 14. When the operation plan for the next day (n + 2 days) is created, the total value (predicted discharge amount total value) of all attached storage batteries 3 of the expected discharge amount (n + 1 day) in the discharge amount table is passed. The predicted power generation amount of (n + 1) day and (n + 2) day stored in the power generation amount prediction table 1 of the solar power generation device 4 that is discharged after being stored in the storage battery 3 is (n + 1) day and (n + 2) day. Since it is irrelevant to grid control, it is not used to create an operation plan. In addition, regarding the solar power generation devices 5 and 6, the predicted power generation amount of each day is used as it is for creating an operation plan.

  (B) In the case of target management, when creating an operation plan for the next day (n + 1 day) on the predicted date (n day), the target discharge amount for the corresponding month on the predicted date (n day) in the discharge target table is To the operation plan creation unit 14. When the operation plan for the next day (n + 2 days) is created, the target discharge amount for the corresponding month of the next day (n + 1 day) in the discharge amount table is passed.

(D) Creation of operation plan (step R04)
The purpose of the present invention is to make maximum use of the power generation capacity of the solar power generation apparatus. To that end, priority power generation by the solar power generation apparatuses 4, 5, and 6 and the non-solar renewable energy power generation apparatus 9a is essential. is there. In order to perform priority power generation of the solar power generation devices 4, 5, 6 and the non-solar renewable energy generation device 9a while maintaining the power supply / demand balance, the solar power generation devices 4, 5, 6 and the non-solar renewable energy power generation A mechanism that compensates for the portion of the power generation amount of the device 9a that cannot satisfy the demand amount is necessary. That is, the difference between the total amount of power generation per hour of the solar power generation devices 4, 5, 6 and the non-solar power generation device 9 a and the demand per hour is calculated as non-renewable power generation such as a thermal power plant or a nuclear power plant. This is a mechanism that covers the total amount of power generated by the device 9b. In the present invention, in order to provide the mechanism, an operation plan describing the control process of the non-renewable power generation device 9b is created and executed. This operation plan includes not only the control (operation) process of the non-renewable power generation apparatus 9b, but also the control (operation) process of the pumped storage power generation apparatus 10 and other electric power company power system / power generation apparatus 11 that are operated in conjunction with it. Is also described.

  The operation plan creation unit 15 creates an operation plan for the next day and two days after the prediction date as follows. That is, the predicted power generation amount per hour of the photovoltaic power generation devices 4, 5, and 6 on the next day and the day after next has been calculated in step R02, and the collection of the power storage results on the predicted date and the calculation of the discharge unit have been completed in step R03. First, (1) the predicted power generation amount per hour of all the solar power generation devices 4, 5, 6 and all the non-solar solar power generation devices 9a is tabulated. Next, (2) the total value of the predicted power generation obtained in (1) is subtracted from the predicted demand per hour to obtain the difference between the two. Finally, (3) the non-renewable power generation device 9b and the non-renewable power generation device 9b and a control process for covering the difference between the non-renewable power generation device 9b and the pumped storage power generation device 10 or another power company power system / power generation device 11 associated therewith. Are defined for each of the pumped-storage power generator 10 or the power system / power generator 11 of another electric power company, and a desired operation plan is completed.

  The data used when creating the operation plan is as shown in FIG. That is, in the case of the household solar power generation device 6, it is a so-called power selling portion obtained by subtracting the consumption from the power generation amount. In the case of the industrial solar power generation device 5 that does not use a storage battery, the lower limit value, the intermediate value, and the upper limit value are output in the power generation amount prediction, but the intermediate value is used in the operation plan. In the case of the industrial solar power generation device 4 having the attached storage battery 3, the actual discharge amount is used for the operation plan for the next day, and the expected discharge amount is used for the operation plan for the next day.

  First, the calculation (1) of the predicted power generation amount per hour of all the solar power generation apparatuses 4, 5, 6 and all the non-solar solar power generation apparatuses 9a is performed as shown in FIG.

  When the operation plan for “next day” is created, first, “predicted hourly power sales amount” is totalized for all household solar power generation devices 6 (step K01). That is, for each solar power generation device 6, the “power sales amount” for the next day in the power generation amount prediction table 2 in FIG. 6 is totaled at intervals of 5 minutes, and the totaled result is stored in the daily total storage unit 22. The totaling result is added to the “intermediate value” column of the “daily solar power generation power generation” for the next day in the predicted power generation daily totaling table of FIG.

  Next, for all the industrial solar power generation devices 5 without storage batteries, the “predicted hourly power generation amount” is tabulated (step K02). That is, for each photovoltaic power generation device 5, the “intermediate value” of “predicted power generation” for the next day in the power generation amount prediction table 1 in FIG. All the photovoltaic power generation devices 5 are totaled at intervals of 5 minutes, and the totaled results are stored in the daily total storage unit 22. The totaling result is added to the “intermediate value” column of “the amount of power generated by direct sunlight transmission” for the next day in the daily power generation amount totaling table of FIG. As a result, the sum total of the predicted power generation amounts for the next day for all household solar power generation devices 6 and all industrial solar power generation devices 5 is generated in the “intermediate value” column of “direct power generation power generation amount”. The

  Next, the “predicted power generation amount per hour” of the non-solar renewable energy power generation device 9a predicted by a known power generation prediction system is totalized for all the same devices 9a (step K03). The count results are stored in the daily count storage unit 22. The totaling result is added to the “non-solar renewable energy power generation” column for the next day in the predicted power generation daily totaling table of FIG.

  Next, it is determined whether or not target management is performed (step K04). If the target management is performed, the process proceeds to step K05, and if the target management is not performed, the process proceeds to step K06.

  In step K05, the “target discharge amount by hour (discharge unit)” for the corresponding month stored in the discharge target table of FIG. 16 is tabulated by time, and the tabulation result is stored in the daily tabulation storage unit 22. The stored result is copied to the column of “target discharge unit” for the next day in the predicted power generation amount totaling table of FIG. 15 from 0:00 to 23:55.

  In step K06, the “hourly discharge amount” in the discharge amount table for the corresponding day (FIG. 13A) is totaled for each solar power generation device 4 having the attached storage battery 3, and the total result is totaled daily. Save in the storage unit 22. The storage result is copied to the “storage battery discharge amount” column for the next day in the predicted power generation amount daily aggregation table of FIG. In the “hourly discharge amount” column, “actual discharge amount” is stored for the next day, and “actual discharge amount” is stored for the next day, so data can be simply read.

  Finally, the power generation amount and the discharge amount of all renewable energy power generation devices that are subject to priority power supply, that is, all the solar power generation devices 4, 5, 6 and all the non-solar solar power generation devices 9a. (Step K07). When target management is performed, the addition results of (non-solar renewable energy generation amount + intermediate value of solar direct power generation amount + target discharge unit) in the predicted generation amount daily aggregation table of FIG. To the “Total” column of the table. When target management is not performed, the addition result of (non-solar renewable energy generation amount + intermediate value of solar direct power generation amount + storage battery discharge amount) in the same table is aggregated by time, and “total” ”Field.

  The above-described steps K01 to K07 are also executed when the operation plan for “next day” is created. However, the difference between “next day” and “next day” is that, when target management is not performed, “actual discharge amount” on the predicted date is used as the discharge amount from all attached storage batteries 3 for “next day”. As the amount of discharge from all the attached storage batteries 3 for “next day”, the “expected discharge amount” on the next day of the prediction date is used. Since “actual discharge amount” or “expected discharge amount” is appropriately stored in the “discharge amount by time” column of the discharge amount table of FIG. 13A, “next day” and “next day”. It is sufficient to take it out from the “hourly discharge amount” column on the corresponding day of the same table.

  As described above, for all the photovoltaic power generation devices 4, 5, 6 and all the non-solar photovoltaic power generation devices 9a, the total power generation result and the total discharge result of the predicted power generation amount and the actual discharge amount or the predicted discharge amount on the next day and the next day, In other words, when the “total amount of electricity generated per hour of the renewable energy power generation device” is obtained, the “total amount of electricity generated per hour of the renewable energy power generation device” and the “predicted hourly demand” are compared, and the next day and the day after next The difference is calculated (2). This difference is the amount of power that should be generated by a power generation device other than the solar power generation devices 4, 5, 6 and the non-solar renewable power generation device 9a, that is, a non-renewable power generation device 9b such as a thermal power plant or a nuclear power plant. Therefore, it is called “supply-demand power difference”. Here, “difference between supply and demand power” for the next day and the next day of the forecast date is calculated according to time. This “difference in supply and demand per hour” is calculated by the following equation 4.

Supply / demand power difference per hour = Estimated demand per hour-
Total power generation per hour by renewable energy generator (Formula 4)
The “difference in supply and demand per hour” calculated by Equation 4 is passed to the operation plan creation unit 15 having a known configuration and function, and the operation plans for the next day and the next day are created using a known method. (3).

  The operation plan created in this way mainly describes the control process of each non-renewable power generation device 9b. This is because the non-renewable power generation device 9b plays a central role to cover (compensate for) the "difference in supply and demand per hour". However, since it may be necessary to utilize the pumped-storage power generation apparatus 10 or the power system / power generation apparatus 11 of another electric power company, the control process of each of the apparatuses 10 and 11 is also supplemented to the operation plan as necessary. Described in By doing so, it is possible to almost eliminate the “difference in power supply and demand per hour” whenever the operation plan is executed.

  The operation plans for the next day and the next day created in this way are stored in the operation plan storage unit 16. Then, on the next day of the prediction date, the operation plan for the next day is executed by the power system control unit 17.

(E) Execution of operation plan (step R05)
As described above, when an operation plan for the next day and the next day is created in the evening of the forecast day, the non-re-started operation is scheduled from the scheduled time on the day after the forecast date (here, set to midnight). The power generation start and stop of the energy generator 9b are executed over a predetermined discharge time zone (here, set to 24 hours). The power system control unit 17 is in charge of executing the operation plan. While the operation plan is being executed, the electric power supply 2a is monitored and the discharge from the attached storage battery 3 of the solar power generation device 4 is performed and adjusted so that the power supply / demand balance at that time is kept within a predetermined range. Implementation of priority power supply for the photovoltaic power generation devices 5 and 6 and the non-solar renewable energy power generation device 9a, adjustment of storage / discharge of the adjustment storage battery 8, adjustment of operation of the pumped storage power generation device 10, power system / power generation device of other electric power companies 11 is adjusted.

  Of the series of adjustment operations described above, the start and stop of power generation by the non-renewable power generation device 9b, the coordination of the pumped-storage power generation device 10 and the other power company power system / power generation device 11, and the balance between power supply and demand The adjustment is performed by the power system control unit 17 of the control system 1. The discharge control unit 23a of the storage battery control unit 23 controls the start and stop of discharge from the attached storage battery 3, and the power balance check between the discharge amount and the demand amount from the attached storage battery 3 is performed by the storage battery control unit 23. The discharge amount adjusting unit 23c is in charge. The storage battery control unit 23b of the storage battery control unit 23 takes charge of the storage / discharge control of the adjustment storage battery 8. The linkage between the pumped storage power generation apparatus 10 and the power system / power generation apparatus 11 of another electric power company is performed by the power system control unit 17 based on its own judgment, but the instruction from the discharge amount adjustment unit 20 is also accepted and the control is performed by the power system. This is performed only by the control unit 17. The power system control unit 17 corresponds to a known system currently used by an electric power company.

(F) Implementation and adjustment of discharge (step R06)
When the operation plan for the next day is executed as described above (step R05), in parallel with this, discharge and adjustment are executed for the auxiliary storage battery 3 and the adjustment storage battery 8. The discharge amount adjustment unit 23c in the storage battery control unit 23 of the control system 1 is in charge of performing and adjusting the discharge.

  The implementation and adjustment of the discharge in step R06 has two roles. The first role is to adjust the discharge amount by monitoring whether or not the discharge amount per hour exceeds the demand amount per hour if the discharge continues for 24 hours. The second role is to carry out target management of the discharge amount. “Target management” is to check the excess / deficiency between the total value of actual discharge amount per hour from all attached storage batteries 3 and the target discharge value per hour of the day, and the total value of actual discharge amount per hour is always Processing is performed so as to match the target value per hour. The adjustment of the excess or deficiency of the power supply and demand is performed by using the adjustment storage battery 8 or by linking with the pumped storage power generator 10 or the power system / power generator 11 of another power company. Needless to say, when managing targets, it is necessary to check the balance between supply and demand and deal with excesses and deficiencies. As will be described later, the control system 1 of the present embodiment is configured to be able to select whether or not “target management” is performed, and is configured to respond differently depending on whether or not target management is performed.

  When performing “target management”, the discharge target value of the entire electric power company is set for each month in advance. The discharge target value is calculated by the discharge target setting unit 24a and stored in the discharge target storage unit 26 in the form of the discharge target table of FIG. When the target management is performed, there is an advantage that a discharge amount that is not influenced by the weather can be supplied from the auxiliary storage battery 3 to the power system 2a.

  Hereinafter, the process of the discharge amount adjusting unit 23c of the storage battery control unit 23 will be described in detail with reference to FIGS. FIG. 10 shows a case where the adjustment storage battery 8 is mainly used for target management, and includes a case where target management is not performed. FIG. 11 shows a case where the pumped storage power generator 10 and another power company power system / power plant 11 are used for target management (the adjustment storage battery 8 is not used).

(When target management is mainly performed using a storage battery for adjustment)
First, as shown in FIG. 10, in the discharge amount table of FIG. 13 (a), the power plant number is designated as “000000”, and the power generation date (working day) is designated as “the day after the forecast date”. The "total value of actual discharge amount per hour", that is, the "total actual discharge amount value" in a 24-hour discharge period from the start of discharge on the next day of the predicted date to the start of discharge on the next day of the next day, is captured. (Step S01) In this embodiment, the “total amount of actual discharge” of the attached storage battery 3 is changed to the amount of discharge shown in FIG. This is because the power plant number column of the table is stored in the “scheduled / actual total value” column of “000000”.

  Next, the operation date is designated as “the next day of the prediction date” in the demand prediction table of FIG. 14, and “hourly predicted demand” at intervals of 5 minutes in the 24-hour discharge time zone is extracted from the table (step S02).

  Next, it is determined whether or not target management is performed (step S03). When the target management is performed, the process proceeds to step S04. When the target management is not performed, the process proceeds to step S06.

  In step S04 in which target management is performed, the target discharge amount (discharge target value) for the month corresponding to the discharge implementation date is fetched from the discharge target table in FIG. 16, and “target discharge” in the predicted power generation amount totaling table in FIG. Save in the “Unit” column.

  Then, in the next step S05, the "predicted hourly demand amount" for the corresponding five minutes is selected from the "predicted hourly demand amount" at intervals of five minutes in the discharge time zone of 24 hours captured in step S02. 14 from the demand forecast table.

  In the next step S12, the total actual discharge amount of the attached storage battery 3 taken in in step S01 is compared with the target discharge amount taken in in step S04. When the target discharge amount exceeds the actual discharge amount total value, the process proceeds to step S13, and when the target discharge amount does not exceed the actual discharge amount total value, the process proceeds to step S20.

  In the following steps S13 to S19, processing when the target discharge amount is larger than the actual discharge total value, that is, processing for replenishing the power shortage from the adjustment storage battery 8 is performed. In the following steps S20 to S23, processing when the target discharge amount is not larger than the actual discharge total value, that is, processing for storing the surplus power in the adjustment storage battery 8 is performed. In this way, the power supply-demand balance is maintained.

  In step S13, since the target discharge amount is larger than the actual discharge total value, the remaining amount of electricity stored in the adjustment storage battery 8 is investigated. If it is determined that the remaining amount of electricity stored in the adjustment storage battery 8 is sufficient, the process proceeds to step S14. If it is determined that the remaining amount of power stored in the adjustment storage battery 8 is insufficient, the process proceeds to step S17.

  In step S14 in which the storage battery 8 of the adjustment storage battery 8 is sufficient, the target discharge amount is compared with the hourly predicted demand amount. If the hourly predicted demand amount is larger than the target discharge amount, the process proceeds to step S15 and the hourly prediction is performed. If the demand amount is not larger than the target discharge amount, the process proceeds to step S16.

  In step S15, when the hourly predicted demand amount is not smaller than the actual discharge total value, the adjustment storage battery is used to cover the power shortage (target discharge amount−actual discharge total value) by the discharge from the adjustment storage battery 8. An instruction is sent to the control unit 23 b to discharge the insufficient power from the adjustment storage battery 8. When the hourly predicted demand amount is smaller than the actual discharge total value, the electric power is not insufficient, so that the processing such as discharging the adjustment storage battery 8 is not performed (unnecessary). Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step S16, when the hourly predicted demand amount is not smaller than the actual discharge total value, the adjustment storage battery is used to cover the power shortage (target discharge amount−actual discharge total value) by the discharge from the adjustment storage battery 8. An instruction is sent to the controller 23b to cause the adjustment storage battery 8 to discharge. When the hourly predicted demand amount is smaller than the actual discharge total value, in order to store the surplus power in the adjustment storage battery 8, an instruction is sent to the adjustment storage battery control unit 23b and the adjustment storage battery 8 is charged. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step S17 where the remaining amount of power stored in the adjustment storage battery 8 is insufficient, the target discharge amount is compared with the hourly predicted demand amount as in step S14. If the hourly predicted demand amount is larger than the target discharge amount, the process proceeds to step S18. If the hourly predicted demand amount is not larger than the target discharge amount, the process proceeds to step S19.

  In step S18, when the hourly predicted demand amount is not smaller than the actual discharge total value, the remaining amount of electricity stored in the adjustment storage battery 8 is insufficient. In order to procure (supplement) from the device 10 or the other power company power system / power generation device 11, an instruction is sent to the pumped storage power generation device 10 or other power company power system / power generation device 11, and the pumped storage power generation device 10 or other power company The shortage is transmitted from the power system / power generation device 11 to the power system 2a. When the hourly predicted demand is smaller than the actual discharge total value, there is no power shortage, so procurement from the pumped storage power generator 10 or the power system / power generator 11 of another power company is not performed (not required). Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step S19, when the hourly predicted demand amount is not smaller than the actual discharge total value, since the remaining amount of power stored in the adjustment storage battery 8 is insufficient, the shortage electric power (target discharge amount−actual discharge total value) is calculated using the pumped storage power generation. In order to procure (supplement) from the device 10 or the other power company power system / power generation device 11, an instruction is sent to the pumped storage power generation device 10 or other power company power system / power generation device 11, and the pumped storage power generation device 10 or other power company The shortage is transmitted from the power system / power generation device 11 to the power system 2a. When the hourly predicted demand amount is smaller than the actual discharge total value, an instruction is sent to the pumped storage power generator 10 or another power company power system / power generator 11, and the pumped power generator 10 or other power company power system / power generator 11 is sent. To store electricity. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  Further, in step S20 where the target discharge amount is not larger than the actual discharge total value, it is not necessary to investigate the remaining amount of power stored in the adjustment storage battery 8 (step S21). Thereafter, the target discharge amount is compared with the hourly predicted demand amount. If the hourly predicted demand amount is larger than the target discharge amount, the process proceeds to step S22. If the hourly predicted demand amount is not larger than the target discharge amount, the process proceeds to step S23. move on.

  In step S22, when the hourly predicted demand amount is not smaller than the actual discharge total value, the adjustment storage battery control unit 23b stores the surplus power (the actual discharge total value−the target discharge amount) in the adjustment storage battery 8. An instruction is sent and surplus power is stored in the adjustment storage battery 8. Similarly, when the hourly predicted demand is smaller than the actual discharge total value, an instruction is sent to the adjustment storage battery control unit 23b to cause the adjustment storage battery 8 to store the surplus power. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step S23, when the hourly predicted demand amount is not smaller than the actual discharge total value, the electric power is not insufficient, so that the process such as discharging the adjustment storage battery 8 is not performed (unnecessary). Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3. When the hourly predicted demand amount is smaller than the actual discharge total value, an instruction is sent to the adjustment storage battery control unit 23b, and the surplus power (actual discharge total value−hourly predicted demand amount) is stored in the adjustment storage battery 8. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  When the processes in steps S12 to S23 are completed as described above, the process proceeds to step S15 and waits for 5 minutes. When 5 minutes have elapsed, the process jumps to step S04, and the processes of step S04, steps S12 to S23, and step S15 are repeated.

  On the other hand, in step S06 when it is determined that the target management is not performed in step S03, the total actual discharge amount of the attached storage battery 3 captured in step S01, which is captured in step S01, is captured in step S02 for the corresponding 5 minutes. It is determined whether it is larger than the estimated hourly discharge amount. If it is determined that the actual discharge amount total value is not greater than the hourly predicted discharge amount, the process proceeds to step S07. If it is determined that the actual discharge amount total value is greater than the hourly predicted discharge amount, the process proceeds to step S10.

  In step S07, a discharge instruction for the next 5 minutes is sent to the discharge controller 23a, and the all attached storage battery 3 is discharged. Then, it progresses to step S08 and waits for 5 minutes. When 5 minutes have elapsed, the process proceeds to step S09, and the predicted hourly discharge amount and the actual discharge amount total value for the next 5 minutes are captured. And it jumps to step S06 and repeats the process of steps S06-S11.

  In step S <b> 10, a discharge instruction for the next 5 minutes is sent to the discharge control unit 23 a, and the all attached storage battery 3 is discharged. Then, it progresses to step S11, and the surplus electric power (Actual discharge amount total value-predicted discharge amount according to time) is stored in the pumped-storage power generator 10 or another electric power company power system / power generator 11. Then, it progresses to step S08 and waits for 5 minutes. When 5 minutes have elapsed, the process proceeds to step S09, and the predicted hourly discharge amount and the actual discharge amount total value for the next 5 minutes are captured. And it jumps to step S06 and repeats the process of steps S06-S11.

  33 and 34 show a special case where the minimum demand occurs twice a day. That is, in the graphs of FIGS. 33 (a) and 34 (a), a power demand curve (solid line) that is completely different from usual, such as January 1 of the year (New Year holiday), is drawn. This is an unusual case where there is a drop in demand twice a day. The state of power storage / discharge of the auxiliary storage battery 3 and the adjustment storage battery 8 at this time is as described in the tables of FIGS. 33 (b) and 34 (b). These tables are based on the content of the predicted power generation amount daily aggregation table (FIG. 15) and are displayed at intervals of 1 hour for convenience, but are actually created at intervals of 5 minutes.

  As is clear from the table of FIG. 33 (b), in step S12, the total amount of actual discharge from the auxiliary storage battery 3 is smaller than the target power generation amount, and therefore many of the total columns of the adjustment storage battery 8 are negative. . This is because the power shortage at each time is covered by the discharge of the adjustment storage battery 8. On the other hand, as apparent from the table of FIG. 34 (b), in step S19, the total actual discharge amount from the attached storage battery 3 is not less than the target power generation amount, so all the total columns of the adjustment storage battery 8 are positive. It has become. This is because a surplus more than the target power generation amount is stored in the adjustment storage battery 8. From these two examples, it can be seen that according to the present embodiment, even if there is an unexpected fluctuation that is different from the usual power demand, a sufficient response can be made and the power supply-demand balance can be kept within a predetermined range. .

(When target management is performed in conjunction with pumped-storage power generation and other power)
Next, processing when target management is performed using the pumped storage power generation apparatus 10 and another power company power system / power generation apparatus 11 without using the adjustment storage battery 8 will be described with reference to FIG.

  Steps X01 to X05 in FIG. 11 are the same as steps S01 to S05 in the case where the above-described adjustment storage battery 8 is used (see FIG. 10). However, it is different from step S03 in FIG. 10 in that no processing is performed when it is determined in step X03 that target management is not performed. This means that target management is always performed in the case of FIG.

  First, immediately after execution of steps X01 to X05, the process proceeds to step X12. In step X12, the actual discharge amount total value of the attached storage battery 3 captured in step X01 is compared with the target discharge amount captured in step X04. When the target discharge amount exceeds the actual discharge amount total value, the process proceeds to Step X13, and when the target discharge amount does not exceed the actual discharge amount total value, the process proceeds to Step X20.

  In the following steps X13 to X16, processing when the target discharge amount is larger than the actual discharge total value, that is, processing for replenishing the shortage of power from the pumped storage power generation device 10 or another power company power system / power generation device 11 is performed. In the following steps X20 to X23, a process when the target discharge amount is not larger than the actual discharge total value, that is, a process of storing or transmitting the surplus power to the pumped storage power generation apparatus 10 or another power company power system / power generation apparatus 11 I do. In this way, the power supply-demand balance is maintained.

  In step X13 where the target discharge amount is larger than the actual discharge total value, it is not necessary to investigate the remaining amount of power stored in the adjustment storage battery 8 as in the case of FIG. 10 (step X14). This is because the adjustment storage battery 8 is not used, and the capacity of the pumped storage power generator 10 and the power system / power generator 11 of another power company is sufficient.

  Subsequent to Step X13, the target discharge amount is compared with the hourly predicted demand amount. If the hourly predicted demand amount is larger than the target discharge amount, the process proceeds to Step X15, and the hourly predicted demand amount is not larger than the target discharge amount. The process proceeds to step X16.

  In step X15, when the hourly predicted demand amount is not smaller than the actual discharge total value, the shortage power (target discharge amount−actual discharge total value) is obtained from the pumped storage power generator 10 or the power system / power generator 11 of another power company. In order to cover the power transmission, an instruction is sent to the pumped-storage power generator 10 or another power company power system / power generation apparatus 11, and the insufficient power is replenished from the pumped-power generation apparatus 10 or other power company power system / power generation apparatus 11. When the hourly predicted demand is smaller than the total actual discharge value, there is no shortage of power, so processing such as power transmission from the pumped storage power generation device 10 or another power company power system / power generation device 11 is not performed (not required). is there). Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step X16, when the hourly predicted demand amount is not smaller than the actual discharge total value, the shortage power (target discharge amount−actual discharge total value) is obtained from the pumped storage power generator 10 or the power system / power generator 11 of another power company. In order to cover the power transmission, an instruction is sent to the pumped-storage power generator 10 or another power company power system / power generation apparatus 11, and the insufficient power is replenished from the pumped-power generation apparatus 10 or other power company power system / power generation apparatus 11. When the hourly predicted demand amount is smaller than the actual discharge total value, the pumped storage power generator 10 or another power company is used to store or transmit surplus power to the pumped power generator 10 or the other power company power system / power generator 11. An instruction is sent to the power system / power generation device 11 to store or transmit power to the pumped storage power generation device 10 or another power company power system / power generation device 11. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  Further, in step X20 where the target discharge amount is not larger than the actual discharge total value, it is not necessary to investigate the remaining amount of power stored in the adjustment storage battery 8 as in the case of FIG. 10 (step X21).

  Following Step X20, the target discharge amount is compared with the hourly predicted demand amount. If the hourly predicted demand amount is larger than the target discharge amount, the process proceeds to Step X22, and the hourly predicted demand amount is not larger than the target discharge amount. The process proceeds to step X23.

  In step X22, when the hourly predicted demand amount is not smaller than the actual discharge total value, the surplus power (actual discharge total value-target discharge amount) is stored in the pumped storage power generation apparatus 10 or another power company power system / power generation apparatus 11. Alternatively, in order to transmit power, an instruction is sent to the pumped storage power generation apparatus 10 or another power company power system / power generation apparatus 11 to store or transmit power to the pumped storage power generation apparatus 10 or other power company power system / power generation apparatus 11. When the hourly predicted demand amount is smaller than the actual discharge total value, the pumped storage power generator 10 or another power company is used to store or transmit surplus power to the pumped power generator 10 or the other power company power system / power generator 11. An instruction is sent to the power system / power generation device 11 to store or transmit power to the pumped storage power generation device 10 or another power company power system / power generation device 11. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  In step X23, when the hourly predicted demand amount is not smaller than the actual discharge total value, the power is not insufficient, and therefore, the process such as discharging the adjustment storage battery 8 is not performed (unnecessary). When the hourly predicted demand amount is smaller than the actual discharge total value, an instruction is sent to the pumped storage power generator 10 or another power company power system / power generator 11, and the pumped power generator 10 or other power company power system / power generator 11 is sent. To store or transmit power. Thereafter, an instruction is sent to the discharge control unit 23 a to discharge all the attached storage batteries 3.

  When the processing in steps X12 to X23 is completed as described above, the process proceeds to step X15 and waits for 5 minutes. When 5 minutes have elapsed, the process jumps to step X04, and the processes of step X04, steps X12 to X23, and step X15 are repeated.

  In the case of FIG. 11, when supplementation (transmission) of insufficient power and storage / transmission of surplus power are required, the work of transmitting an instruction to the pumped storage power generation apparatus 10 or another power company power system / power generation apparatus 11 is This is performed by the discharge amount adjusting unit 23c.

(Operation of storage battery controller)
As described above, the storage battery control unit 23 of the control system 1 is in charge of starting and stopping the discharge from the attached storage battery 3 and starting and stopping the storage and discharge of the adjustment storage battery 8. The storage battery control unit 23 is independent of the part (power system control unit 17) used for controlling the power system 2a of the central system 1 and constantly controls the operations of the auxiliary storage battery 3 and the adjustment storage battery 8. As shown in FIG. 3, the storage battery control unit 23 includes a discharge control unit 23 a that controls the discharge of the auxiliary storage battery 3, an adjustment storage battery control unit 23 b that controls the storage and discharge of the adjustment storage battery 8, and the above step R <b> 06. It is divided into a discharge amount adjusting unit 23c that executes and adjusts discharge.

  Since the operation of the discharge amount adjusting unit 23c has been described above, the operations of the discharge control unit 23a and the adjustment storage battery control unit 23b will be described with reference to FIG.

  Operation | movement of the discharge control part 23a which controls the discharge of the auxiliary storage battery 3 is as showing to Fig.20 (a).

  First, a data group (hourly discharge amount) in the discharge amount table of FIG. 13A is read (step M01). Next, the discharge start time and current time of the read data group (hourly discharge amount) are checked, and the discharge unit (actual discharge amount per hour) corresponding to the current time is captured. (Step M02). The discharge unit (actual discharge amount per hour) is obtained in the above-described collection of power storage results and discharge unit calculation step (step R03). Thereafter, a command (discharge control signal) is transmitted to the attached storage battery 3 to be discharged via the communication network 2b so as to discharge in the discharge unit corresponding to the current time (step M03). The corresponding auxiliary storage battery 3 discharges in designated discharge units in accordance with this command, and supplies power to the power system 2a. This discharge is performed uniformly over the entire 24-hour discharge period.

  Next, it is determined whether or not the discharge from all attached storage batteries 3 has been completed (step M04). If determined to be incomplete, the process jumps to step M01 and repeats steps M01 to M4 to transmit a discharge command to the next auxiliary storage battery. If it is determined that the process is complete, the process is terminated.

  Next, the operation of the adjustment storage battery control unit 23b that controls the discharge and storage of the adjustment storage battery 8 will be described. The operation of the adjustment storage battery control unit 23b is as shown in FIG.

  First, it is determined whether or not the control amount data (value) included in the received adjustment storage battery control signal is positive (step N02). If it is determined that the control amount data (value) is negative, the process proceeds to step N03. If it is determined to be positive, the process proceeds to Step N04.

  In step N03, the received control amount data (value) is interpreted as “discharge amount”, and a discharge command is transmitted to the adjustment storage battery 8. The adjustment storage battery 8 discharges in response to the discharge command, and supplies the power system 2a with an amount of power corresponding to the designated amount of discharge.

  In step N04, the received control amount data (value) is interpreted as “storage amount”, and the storage command is transmitted to the adjustment storage battery 8. The adjustment storage battery 8 stores power in accordance with the power storage command, and stores a power amount corresponding to the specified power storage amount from the power system 2a.

(Configuration of attached storage battery and adjustment storage battery)
Each attached storage battery 3 needs to have a configuration capable of simultaneously executing discharge and storage. An example of the configuration is shown in FIG. In the configuration example shown in the figure, the auxiliary storage battery 3 includes a first power storage unit and a second power storage unit that can switch between discharge and power storage. The first power storage unit and the second power storage unit are connected to the photovoltaic (PV) power generation device via the power storage changeover switch, and are connected to the facility of the power system 2a via the power transmission changeover switch, It is also connected to the discharge command switch. The power storage switch and the power transmission switch are controlled by a centralized switching control device. When the central switching control device receives the switching command sent from the discharge control unit 23a, for example, the first power storage unit is set on the power storage side, and the second power storage unit is set on the discharge side. Then, when the next switching command is received, for example, the second power storage unit is set to the power storage side, and the first power storage unit is set to the discharge side. Thus, these two power storage units can be alternately switched between the power storage side and the discharge side. When the central switching control device receives the switching command at the discharge start time, the central switching control device connects the power storage unit (for example, the first power storage unit) set on the power storage side to the facility of the power system 2a, and the power storage unit (for example, the first power storage unit). (1 power storage unit) can be discharged to supply power to the power system 2a.

  An example of the switching pattern (daily function sharing) between the first power storage unit and the second power storage unit is shown in FIG. In the switching pattern of the figure, at the beginning of the operation on the predicted date (day n), the first power storage unit is set to the power storage side and the second power storage unit is set to the discharge side, but the operation starts on the next day (n + 1 day). Sometimes the switch command is received, and the first power storage unit is switched to the discharge side, and the power generation system 2a can be discharged with the generated power for the predicted date (n days). At the same time, the second power storage unit is switched to the power storage side and used to store the generated power for the next day (n + 1 day). On the next day (n + 2 days), the power storage / discharge pattern is the same as the predicted date (n days). The auxiliary storage battery 3 has such a configuration, so that storage and discharge can be performed simultaneously. That is, the switching between the storage and discharge of the first storage unit and the second storage unit is performed every day at the same time, so that storage and discharge can be simultaneously performed in each attached storage battery 3.

  Similarly to the auxiliary storage battery 3, the adjustment storage battery 8 needs to have a configuration capable of simultaneously performing discharge and storage, and thus can have the same configuration as shown in FIGS. 19 (a) and 19 (B). .

(Daily flow of control system from power generation forecast to execution of operation plan)
As shown in FIG. 6, the control system 1 according to the present embodiment prepares (step R01), predicts demand and power generation (step R02), collects storage results and calculates discharge units (step R03), and the next day. The solar power generation devices 4, 5 are executed by executing six steps of creation of an operation plan for the minute and the day after next (step R 04), execution of the operation plan (step R 05), and execution and adjustment of discharge (step R 06). , 6 supports the preferential power supply to the power system 2a.

  Among these six steps, the discharge target setting during the preparation step is performed on a day before the predicted date, for example, any day before the day when the photovoltaic power generation device 4 starts operation. The demand amount prediction and power generation amount prediction step, the power storage result collection / discharge unit calculation step, and the operation plan creation step are performed on the prediction date. Also, execution of the created operation plan for the next day is started after a predetermined time (in the present invention, it is midnight on the next day of the prediction date) and is continued for 24 hours. During execution of the operation plan for the next day, discharge and adjustment of the auxiliary storage battery 3 are performed. That is, the operation plan execution step and the discharge execution and adjustment step are executed on the day following the prediction date. It is important for the present invention that the above-described six steps are executed in such a manner that they are shifted in time and that the execution timings thereof are set appropriately.

  Therefore, the operation flow of the control system 1 from the prediction of the demand amount and the power generation amount to the execution of the operation plan will be described with reference to FIG. 4 along the time axis. In order to focus on how the discharge from the attached storage battery 3 is performed, in FIG. 4, the photovoltaic power generation apparatuses 5 and 6 and the non-solar renewable energy power generation apparatus that do not have the attached storage battery are used. Power generation from 9a is omitted.

  FIG. 4A shows the operation status when the target management is performed, and FIG. 4B shows the operation status when the target management is not performed. The difference between FIG. 4A and FIG. 4B is whether or not the actual discharge unit varies from day to day. That is, in the case of FIG. 4A, the amount of stored electricity changes every day, but the discharge unit does not change every day. The same amount is discharged every day. On the other hand, in the case of FIG. 4B, the discharge unit changes day by day.

  In the case of target management, as shown in FIG. 4 (a), the battery is discharged every day regardless of the weather. The reason why the same amount can be discharged is that the “target discharge amount” is set every month for each photovoltaic power generation device 4 equipped with the attached storage battery 3 before any forecast date, This is because the difference between the actual discharge amount and the target discharge amount is adjusted (compensated) by the adjustment storage battery 8, the pumped storage power generation device 10, or another power company power system / power generation device 11. This adjustment is performed in the discharge implementation and adjustment steps when the next day's operation plan for the non-renewable power generation device 9b created on the prediction date is executed on the next day.

  In the case of no target management, as shown in FIG. 4B, only the amount actually generated and stored is discharged. Therefore, a difference occurs between the discharge amount on the next day on a sunny day and the discharge amount on the next day on a cloudy day.

  On the predicted date, an operation plan for the next day and the next day (this is for the non-renewable power generation device 9b) is created. In order to create an operation plan, it is necessary to assume the hourly power demand on the next day and the day after next. In creating an operation plan, priority is given to renewable energy generators (that is, photovoltaic generators 4, 5, 6 and non-solar renewable energy generator 9a). It is assumed that the difference is compensated by the non-renewable power generation device 9b. For this reason, it is necessary to know the predicted power generation amount of the renewable energy power generation devices (4, 5, 6, 9a) and the predicted discharge amount from the auxiliary storage battery 3 before the operation plan is created. As the predicted discharge amount for the next day, the actual discharge amount collected on the prediction day is used, and as the discharge amount for the next day, the predicted discharge amount for the next day is used. It is necessary to know the amount.

  Of the operation plans for the next day and the next day created in this way, the execution of the operation plan for the next day starts at midnight on the next day, and starts and stops the non-renewable power generation device 9b in accordance with the operation plan for the next day. The generated power is fed to the power system 2a. At the same time, discharge from the attached storage battery 3 is also started. Furthermore, the electric power for direct transmission by the solar power generation devices 5 and 6 that do not have the attached storage battery 3 and the power generated by the non-solar solar power generation device 9a are also fed to the power system 2a. Further, power generation by the solar power generation device 4 having the attached storage battery 3 is started at the same time as the next day dawn, but the generated power is temporarily stored in the attached storage battery 3 and is not immediately supplied to the power system 2a. 4 (a) and 4 (b) are shown by broken line curves.

  On the next day, in addition to the above, power is supplied to the electric power system 2 a by discharging from the auxiliary storage battery 3 of the solar power generation device 4. In this case, since the discharge from the auxiliary storage battery 3 is continuously performed in the discharge time zone of 24 hours (or a time close thereto), the discharge amount may exceed the demand amount on the next day. Therefore, immediately before the discharge, it is necessary to constantly check the amount of demand and the amount of discharge at the corresponding time to stabilize the power supply-demand balance. When it is determined that this supply and demand balance is lost, it is dealt with by coordinating with the storage battery 8 for adjustment, the pumped storage power plant 10, and the power system / power generation device 11 of another electric power company. In discharging, the difference between the actual discharge amount and the target discharge amount when performing target management is also performed in the 24-hour discharge time zone.

  Thereafter, the same processing as described above is repeated every day.

(Effects obtained by the control system of this embodiment)
As is apparent from the above description, the power system control system 1 according to an embodiment of the present invention has the above-described configuration and functions, and operates as described above. For this reason, the following effects are obtained.

  In other words, in the power system control system 1 according to the present embodiment, a plurality of industrial solar power generation devices configured such that the power system 2a to be controlled stores the generated power in the auxiliary storage battery 3 and then feeds it. 4 (first solar power generation device), and a plurality of industrial solar power generation devices 5 and home solar power generation devices 6 (second solar power generation devices) configured to directly feed the generated power. A plurality of non-solar renewable energy generators 9a configured to directly supply the generated power, and a plurality of non-renewable energy generators 9b configured to directly supply the generated power. And.

  In addition, the control system 1 acquires (a) the demand forecast unit 24b (predicted demand quantity acquisition means), the forecast demand quantity per hour on the next day and the second day after the forecast day, on or before any forecast date, (B) By the power generation amount prediction unit 14 (predicted discharge amount calculation means), the predicted storage amount of the next day is calculated based on the weather forecast for each of the auxiliary storage batteries 3 of the plurality of photovoltaic power generation devices 4 on the prediction day. And calculating a predicted discharge amount per hour when the predicted power storage amount is discharged to the power system 2a in a predetermined discharge time zone (substantially 24 hours) on the next day, and (c) a storage result collection / discharge unit calculation unit 19 (actual discharge amount calculating means) calculates the actual discharge amount per hour on the next day from the storage performance of each of the auxiliary storage batteries 3 of the plurality of solar power generation devices 4 on the prediction day, and (d) prediction of the power generation amount 14 (predicted power generation amount calculation means) calculates the predicted power generation amount per hour on the next day and the next day of each of the plurality of photovoltaic power generation devices 5 and 6 based on the weather forecast on the prediction day, and (e ) By the power generation amount prediction unit 14 (predicted discharge amount acquisition means), the predicted power generation amount per hour on each of the next day and the next day of each of the plurality of non-solar solar power generation devices 9a is acquired on or before the prediction date. To do.

  In addition, (f) the operation plan creation unit 15 (operation plan creation means) calculates the total value of the actual discharge amount per hour on the next day of the auxiliary storage battery 3 of the plurality of photovoltaic power generation devices 4 on the prediction date, The total value of the predicted power generation amount per hour on the next day of the solar power generation devices 5, 6, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar solar power generation devices 9 a, and the next day Based on the predicted demand per hour at, an operation plan for the next day of each of the plurality of non-renewable power generation devices 9b is created in consideration of a power supply / demand balance. Furthermore, (g) on the prediction date, the total value of the predicted discharge amount per hour on the next day of the attached storage battery 3 of the plurality of solar power generation devices 4 and the day after day of the plurality of solar power generation devices 5 and 6 Based on the total value of the predicted power generation per hour, the total value of the predicted power generation per hour on the next day of the non-solar renewable power generation devices 9a, and the predicted demand per hour on the next day Considering the supply and demand balance, an operation plan for the next day of each of the plurality of non-renewable power generation devices 9b is created.

  And (h) When the operation plan for the next day is executed on the next day, each of the auxiliary storage batteries 3 of the solar power generation device 4 is used in the discharge time zone with the actual discharge amount per hour on the next day. (I) During the execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery 3 of the plurality of solar power generation devices 4 and the plurality of solar power generation devices The sum of the total value of the predicted power generation amount per hour 5 and 6 and the total value of the predicted power generation amount per hour of the non-solar solar power generation devices 9a exceeds the predicted demand amount per hour Then, the excess is absorbed by the adjusting storage battery 8, the pumped-storage power generator 10, and the power system / power generator 11 of another power company (excess absorption means).

  For this reason, even if the power generation amount of the plurality of solar power generation devices 4 is superimposed and rapidly increased during the south and middle hours, it is gradually discharged over a period of about 24 hours. In this way, the voltage is reduced from 1/3 when the discharge is not performed gradually to 1/4. Therefore, the phenomenon of “excess demand due to concentration of peak power generation” can be suppressed (substantially eliminated).

  Further, during the execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery 3 of the plurality of photovoltaic power generation apparatuses 4 and the prediction per hour of the plurality of photovoltaic power generation apparatuses 5 and 6 are performed. When the sum of the total power generation amount and the total hourly predicted power generation amount of a plurality of non-solar solar power generation devices 9a exceeds the predicted hourly demand amount, the excess amount is adjusted. Because it is designed to be absorbed by the storage battery 8, the pumped storage power generator 10, and the other power company power system / power generator 11 (excess absorption means), it is necessary to suppress the output of the solar power generators 4, 5, 6 This situation does not occur.

  Therefore, the power generation capacity of the solar power generation devices 4, 5, and 6 connected to the power system 2a can be utilized to the maximum while suppressing the phenomenon of “excess demand due to concentration of peak power generation”.

  Further, the actual storage amount per hour on the next day from the storage results of each of the auxiliary storage batteries 3 of the plurality of photovoltaic power generation devices 4 on the predicted date by the storage result collection / discharge unit calculation unit 19 (actual discharge amount calculation means). And the operation plan creation unit 15 (operation plan creation means) creates an operation plan for the next day of each of the non-renewable power generation devices 9b using the operation plan creation unit 15 (operation plan creation means). Even if the included predicted discharge amount per unit time deviates greatly from the actual discharge amount due to a weather forecast error, the actual discharge amount per hour calculated from the storage performance of each of the attached storage batteries 3 on the next day is calculated. Therefore, the power system 2a is not adversely affected. Therefore, stable power can be supplied to the power system 2a without being influenced by the weather.

  In addition, during the execution of the operation plan for the next day on the next day, the total value of the actual discharge amount per hour of the auxiliary storage battery 3 of the plurality of photovoltaic power generation apparatuses 4 and the plurality of photovoltaic power generation apparatuses 4, 5, 6 When the sum of the total value of the predicted power generation amount per hour and the total value of the predicted power generation amount per hour of the plurality of non-solar renewable power generation devices 9a exceeds the predicted demand amount per hour, Since the excess is absorbed by the adjustment storage battery 8, the pumped-storage power generator 10, or another power company power system / power generator 11 (excess absorption means), the solar power generators 4, 5, 6 Even if the number of connections (installations) increases, not only the existing photovoltaic power generation devices 4, 5, and 6 but also the added photovoltaic power generation devices 4, 5, and 6 are prevented from suppressing output. Is possible. Therefore, the total number of the photovoltaic power generators 4, 5, and 6 connected to the power system 2a can be significantly increased (almost unlimited). In the future, it will be possible to expect that the total amount of power generation in the year will be covered by the solar power generation devices 4, 5, 6.

  Furthermore, in the control system 1 of the present embodiment, a target discharge amount (discharge target) is set for the total discharge amount of all the solar power generation devices 4 (first solar power generation devices), and the target discharge amount (always) “Target management” for performing discharge in accordance with the discharge target) can be performed, so that even if there is a change in weather, by compensating the predicted discharge amount according to the change, It can be used as a base power source with a stable discharge amount.

  In the present embodiment, the adjustment storage battery 8 (adjustment secondary battery) can be used for “target management”, and the pumped storage power generator 10 can be operated, It is also possible to link with the power generation device 11.

  The feed-in tariff system that started in July 2012 has already passed three years, but the capacity of the newly certified solar power generation device during that period is 87 million kW, and the total renewable energy power generation device It accounts for over 90 percent. Among solar power generation, household use is less than 10% in terms of capacity ratio, and 90% or more is industrial use. The total capacity of power plants of 1000KW or more for industrial use is 65 million KW, which is equivalent to 65 nuclear power plants (capacity ratio) and accounts for 75% (capacity ratio) of all photovoltaic power generation equipment. There are 8600 cases, which is only 0.3% in terms of the number of cases. Therefore, when the auxiliary storage battery 3 of the present invention is installed in all newly certified solar power generation devices of 1000 KW or more, 75% of all the solar power generation devices can function as a stable base power source without being suppressed in output. It becomes possible. In terms of 24-hour operation, this is equivalent to 20-30 nuclear power plants operating. Moreover, only 0.3% of all photovoltaic power generation devices install the attached storage battery 3.

  Thus, since the present invention can be easily applied to an existing electric power system and implemented, the present invention is very feasible.

(Modification)
The above-described embodiment shows an example embodying the present invention. Therefore, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Control system 2a Electric power system 2b Communication network 3 Attached storage battery 4 Industrial solar power generation device (with storage battery)
5 Industrial photovoltaic power generation equipment (without storage battery)
6 Solar power generator for home use (without storage battery)
7 Consumer 8 Adjustment storage battery 9a Non-solar renewable energy power generator (non-solar renewable energy generator)
9b Non-renewable energy generator (non-renewable energy generator)
DESCRIPTION OF SYMBOLS 10 Pumped-storage type power generator 11 Other electric power company electric power system and electric power generation device 12 Weather forecast provider 13 Internet 14 Electric power generation amount prediction part 15 Operation plan preparation part 16 Operation plan preservation | save part 17 Electric power system control part 18 Electric power generation amount prediction preservation | save part 19 Power storage results Collection / discharge unit calculation unit 21 Discharge schedule / result storage unit 22 Daily total storage unit 23 Storage battery control unit 23a Discharge control unit 23b Adjustment storage battery control unit 23c Discharge amount adjustment unit 24 Offline work unit 24a Discharge target setting unit 24b Demand prediction Unit 24c non-solar renewable energy generation prediction unit 25 solar power generation information storage unit 26 discharge target storage unit 27 demand prediction storage unit 28 other power source prediction storage unit

Claims (8)

A plurality of first solar power generation devices configured to store the generated power in the attached storage battery and then supply power to the power system, and a plurality configured to supply the generated power directly to the power system A second solar power generation device, a plurality of non-solar renewable energy power generation devices configured to feed the generated power directly to the power system, and the generated power directly to the power system A method of controlling a power system comprising a plurality of non-renewable energy power generation devices configured to supply power,
(A) Obtain an estimated demand amount per hour on the next day and the next day after the forecast date on or before any forecast date;
(B) For each of the attached storage batteries of the plurality of first photovoltaic power generation apparatuses, the predicted power storage amount for the next day is calculated based on a weather forecast on the predicted date, and the predicted power storage amount is determined on the predetermined day after the next day. Calculate the predicted discharge amount per hour when discharging to the power system during the discharge time zone,
(C) On the prediction date, the actual discharge amount per hour on the next day is calculated from the storage results of each of the auxiliary storage batteries of the plurality of first photovoltaic power generation devices,
(D) calculating the predicted power generation amount per hour on the next day and the next day of each of the plurality of second photovoltaic power generation devices based on a weather forecast on the prediction day;
(E) Obtaining a predicted power generation amount per hour on the next day and the next day of each of the plurality of non-solar renewable energy power generation devices, on or before the predicted date,
(F) On the prediction date, the total value of the actual discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices, and the next day of the plurality of second solar power generation devices Based on the total value of predicted power generation per hour, the total value of predicted power generation per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the predicted demand per hour on the next day, Create an operation plan for the next day of each of the plurality of non-renewable energy power generation devices in consideration of a power supply-demand balance,
(G) On the prediction date, a total value of the predicted discharge amount per hour on the next day of the attached storage battery of the plurality of first photovoltaic power generation devices, and the next day on the next day of the plurality of second solar power generation devices. Based on the total value of predicted power generation per hour, the total value of predicted power generation per hour on the next day of the non-solar renewable energy power generation devices, and the predicted demand per hour on the next day, Considering the power supply / demand balance, create an operation plan for the next day of each of the plurality of non-renewable energy power generation devices,
(H) When the next day's operation plan is executed on the next day, each of the auxiliary storage batteries of the first photovoltaic power generation device is used in the discharge time zone with the actual discharge amount per hour on the next day. Discharging the power system,
(I) During execution of the operation plan for the next day, a total value of the actual discharge amount per hour of the auxiliary storage battery of the plurality of first solar power generation devices, and the plurality of second solar power generation devices When the sum of the total value of predicted power generation per hour and the total value of predicted power generation per hour of the non-solar renewable energy power generation devices exceeds the predicted demand per hour, the excess A method for controlling an electric power system, characterized in that a portion is absorbed by an excess absorption means. Each of the auxiliary storage batteries of the plurality of first solar power generation devices includes a first power storage unit and a second power storage unit that can switch between discharge and power storage, and the first power storage unit and the second power storage unit. Any one of is used for discharging performed according to the operation plan for the next day, and the other is configured to be used for power storage for increasing the power storage performance for the next day,
The discharge performed according to the operation plan for the next day and the power storage for increasing the power storage result for the next day are executed in parallel on the next day using the first power storage unit and the second power storage unit,
The power system control method according to claim 1, wherein switching between storage and discharge of the first storage unit and the second storage unit is performed every day at the same time. The battery further includes an adjustment storage battery connected to the power system, and the target discharge amount is set to the total value of the actual discharge amounts per hour of the plurality of first solar power generation devices on the next day. And
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
When the target discharge amount exceeds the total value of the actual discharge amount per time, if the storage amount of the adjustment storage battery is sufficient, the difference between the target discharge amount and the total value is calculated as the adjustment storage battery. If the amount of electricity stored in the adjustment storage battery is not sufficient, the difference between the target discharge amount and the total value is supplemented using a pumped-storage power generator or another power company power system / power generator. And
3. The difference between the target discharge amount and the total value is absorbed by power storage in the adjustment storage battery when the target discharge amount does not exceed the total value of the actual discharge amount per hour. Power system control method. The apparatus further includes a pumped storage power generator installed in the power system, and a target discharge amount is set to a total value of the actual discharge amounts per hour of the plurality of first solar power generation devices on the next day. And
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
Further, the predicted demand amount per hour and the target discharge amount are compared, and depending on the result, the difference between the target discharge amount and the actual discharge amount per time or the predicted demand amount per hour and the actual discharge amount per hour. The power system control method according to claim 1 or 2, wherein the difference from the discharge amount is absorbed using a pumped-storage power generator or another power company power system / power generator. A plurality of first solar power generation devices configured to store the generated power in the attached storage battery and then supply power to the power system, and a plurality configured to supply the generated power directly to the power system A second solar power generation device, a plurality of non-solar renewable energy power generation devices configured to feed the generated power directly to the power system, and the generated power directly to the power system A system for controlling a power system comprising a plurality of non-renewable energy power generation devices configured to supply power,
(A) Predicted demand amount acquisition means for acquiring the predicted demand amount per hour on the next day and the second day after the prediction date, on or before any forecast date;
(B) For each of the attached storage batteries of the plurality of first photovoltaic power generation apparatuses, the predicted power storage amount for the next day is calculated based on a weather forecast on the predicted date, and the predicted power storage amount is determined on the predetermined day after the next day. Predicted discharge amount calculating means for calculating a predicted discharge amount per hour when discharging to the electric power system during the discharge time zone,
(C) On the prediction date, an actual discharge amount calculating means for calculating an actual discharge amount per hour on the next day from a storage result of each of the attached storage batteries of the plurality of first solar power generation devices;
(D) Predicted power generation amount calculation means for calculating a predicted power generation amount per hour on the next day and the next day of each of the plurality of second solar power generation devices based on a weather forecast on the prediction date;
(E) Predicted power generation amount acquisition means for acquiring the predicted power generation amount per hour on the next day and the next day of each of the plurality of non-solar renewable energy power generation devices, on or before the predicted date,
(F) An operation plan creation means for creating an operation plan for the next day and the next day of each of the plurality of non-renewable energy power generation devices in consideration of a power supply / demand balance on the forecast date;
(G) When the operation plan for the next day is executed on the next day, each of the auxiliary storage batteries of the first photovoltaic power generator is set in the discharge time zone with the actual discharge amount per hour on the next day. Attached storage battery discharging means for discharging to the power system,
(H) During execution of the operation plan for the next day, the total value of the actual discharge amount per hour of the attached storage battery of the plurality of first solar power generation devices, and the plurality of second solar power generation devices When the sum of the total predicted power generation amount per hour and the total predicted power generation amount per hour of the plurality of non-solar renewable energy power generation devices exceeds the predicted demand amount per hour, With excess absorption means for absorbing excess,
(I) The operation plan creation means includes a total value of the actual discharge amount per hour on the next day of the attached storage battery of the plurality of first solar power generation devices and the plurality of second sunlight on the prediction date. The total value of the predicted power generation amount per hour on the next day of the power generation device, the total value of the predicted power generation amount per hour on the next day of the plurality of non-solar renewable energy power generation devices, and the prediction per hour on the next day Based on the demand amount, taking into account the power supply-demand balance, create an operation plan for the next day of each of the plurality of non-renewable energy power generation devices,
On the prediction date, the total value of the predicted discharge amount per hour on the next day of the attached storage battery of the plurality of first photovoltaic power generation devices and the hourly prediction on the next day of the plurality of second solar power generation devices. Based on the total value of power generation, the total value of predicted power generation per hour on the next day of the non-solar renewable energy power generation devices, and the predicted demand per hour on the next day In consideration of the above, an operation plan for the next day of each of the plurality of non-renewable energy power generation apparatuses is created. Each of the auxiliary storage batteries of the plurality of first solar power generation devices includes a first power storage unit and a second power storage unit that can switch between discharge and power storage, and the first power storage unit and the second power storage unit. Any one of is used for discharging performed according to the operation plan for the next day, and the other is configured to be used for power storage for increasing the power storage performance for the next day,
The discharge performed according to the operation plan for the next day and the power storage for increasing the power storage performance for the next day are executed in parallel on the next day using the first power storage unit and the second power storage unit,
The electric power system control system according to claim 5, wherein switching between storage and discharge of the first storage unit and the second storage unit is performed every day at the same time. The battery further includes an adjustment storage battery connected to the power system, and the target discharge amount is set to the total value of the actual discharge amounts per hour of the plurality of first solar power generation devices on the next day. And
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
When the target discharge amount exceeds the total value of the actual discharge amount per time, if the storage amount of the adjustment storage battery is sufficient, the difference between the target discharge amount and the total value is calculated as the adjustment storage battery. If the amount of electricity stored in the adjustment storage battery is not sufficient, the difference between the target discharge amount and the total value is supplemented using a pumped-storage power generator or another power company power system / power generator. And
7. The difference between the target discharge amount and the total value is absorbed by power storage in the adjustment storage battery when the target discharge amount does not exceed the total value of the actual discharge amount per time. Power system control system. The apparatus further includes a pumped storage power generator installed in the power system, and a target discharge amount is set to a total value of the actual discharge amounts per hour of the plurality of first solar power generation devices on the next day. And
When executing the operation plan for the next day, it is determined whether the target discharge amount exceeds the total value of the actual discharge amount per hour of the plurality of first solar power generation devices on the next day,
Further, the predicted demand amount per hour and the target discharge amount are compared, and depending on the result, the difference between the target discharge amount and the actual discharge amount per time or the predicted demand amount per hour and the actual discharge amount per hour. The power system control system according to claim 5 or 6, wherein the difference from the discharge amount is absorbed by using a pumped-storage power generator or another power company power system / power generator.

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