JP2014128140A - Power suppression control system and power suppression control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power suppression control system in which a load is adjusted while considering a demand/supply situation and an incentive of an adjustment amount performing the load adjustment can be appropriately evaluated.SOLUTION: A power suppression control system 10 comprises: a database 20 including bank capacity of a distribution substation, feeder capacity, capacity of a distributed power source for photovoltaic power generation or the like interlocked to a system, capacity of a storage battery for the system and the like; a distribution substation adjustment amount distribution computation device 9 for computing and holding a load suppression amount or a load creation amount for the unit of a distribution substation; a feeder adjustment amount distribution computation device 7 for computing and holding a load suppression amount or a load creation amount for the unit of a feeder; and a pole transformer adjustment amount distribution computation device 8 for computing and holding a load suppression amount or a load creation amount for the unit of a pole transformer on the basis of consumer control object apparatus information including capacity of the pole transformer, capacity of a distributed power source for photovoltaic power generation for domestic use, capacity of a storage battery for domestic use, and load information of a heat pump for domestic use, an electric vehicle or the like.

Description

  The present invention relates to a power suppression control system and a power suppression control method capable of obtaining a load adjustment amount in consideration of a power demand that changes from moment to moment and giving an incentive to a consumer when performing power demand adjustment on the load side. .

  Conventionally, supply and demand control is performed in the power system in order to maintain a balance between supply and demand. Supply and demand control is control for matching the amount of power generation with a load that varies from moment to moment. For this reason, equipment capable of controlling the load on the load side has not yet become widespread.

  In addition, there is a demand adjustment device that adjusts demand with the cooperation of customers, but depending on the demand shift method, it is unclear whether the demand can be appropriately shifted, and incentives tailored to the supply and demand situation There was a problem that it was difficult to give.

  In addition, there is a method of dynamically giving incentives to the amount of power reduction and reducing the power consumption of consumers, but sufficient consideration has been given to accommodation with other loads under pole transformers and feeders. However, there is a problem that the potential of existing facilities that can be used is not fully utilized.

  In order to deal with the above-mentioned problem, for example, in Patent Document 1, a “cooperation level” that is information obtained by quantifying the level of cooperation of a consumer with respect to an adjustment request for energy usage is calculated in the demand adjustment server. The “Cooperation Level Judgment Function” has been established, and the operator of the demand adjustment server identifies the customer or customer equipment that will surely respond to the request for adjustment of energy usage based on the level of cooperation level. It is disclosed that the request is distributed only to these.

  Further, in Patent Document 2, a central device, a plurality of lower-level devices, and a consumer computer system are connected via a communication network, and a demand status is predicted in the central-device computer system; A means for obtaining the power demand adjustment amount for each subordinate device based on information including historical data relating to the power demand adjustment of the device, and a means for transmitting these to a plurality of subordinate devices, which are necessary for power demand adjustment. It is disclosed to suppress fluctuations in incentives.

  Further, in Patent Document 3, the consumer device includes pattern operation storage means for setting and storing one or more operation patterns of the consumer, and the limit value determining means is configured to store the pattern operation storage based on the input from the consumer. It is disclosed that an operation pattern is selected from the means, a limit value is determined corresponding to the selected operation pattern, and the load control means controls the load in the consumer corresponding to the operation pattern.

  Further, in Patent Document 4, the power supplier predicts the load demand, calculates the incentive power charge when the power exceeds the amount of power generated by the current power generation facility, and starts the peak load power generation facility or other power supply Incentive power that calculates the cost of purchasing power from a supplier and requests the customer to reduce power when incentive power control is judged to be inexpensive, and pays incentive fees for the reduced power Performing load control is disclosed.

JP 2012-151992 A JP 2003-87969 A JP 2000-78748 A JP 2002-176729 A

The patent literature has the following problems as individual problems.
In Patent Document 1, it is difficult to judge whether the demand has been accurately peak shifted, such as excessive peak shift or insufficient peak shift. It may be difficult to determine how much of the total system demand contributes.

  Patent Document 2 aims to achieve demand adjustment by making demand prediction and reducing incentive fluctuations according to the prediction result. However, the prediction result may greatly deviate, and sufficient demand adjustment may be performed. It may not be possible.

  Patent Document 3 is a method in which a limit value is given to a customer's load from a past load pattern, the load is controlled within the range, and an incentive according to the demand situation is given. This method aims at load adjustment within the customer and is limited load adjustment.

  Patent Document 4 is a method of dynamically giving an incentive and reflecting it in a power charge. Even if a consumer has an adjustment amount that can be accommodated, there is a possibility that only an adjustment amount that has been decided once can be adjusted, and that the amount of electric power that can be adjusted by existing facilities is given up.

  As described above in the background art, the load on consumers changes from moment to moment, and in the future, distributed power sources such as solar power generation for home use and secondary batteries such as storage batteries will become more widespread. Demand forecasting will be difficult because of the possibility. In other words, in order to perform load prediction, it is considered necessary to utilize not only the temperature but also various weather conditions such as weather, humidity, and wind speed, and load patterns that take into account complex factors such as storage battery charge / discharge constraints. .

  In addition, even if the adjustment amount of the same load is shifted, there is a difference in the contribution of supply and demand adjustment from the grid side of the power company, etc., in the situation where the demand adjustment situation is severe and the situation where it is not so severe. Therefore, there is a problem that the adjusted incentive is not fully evaluated.

  In addition, calculating the load adjustment amount only once will miss the adjustment amount that may be covered by other pole transformers and other feeders, so that existing facilities can be used sufficiently. There is a problem that it is not done.

  The present invention is an invention for solving the above-described problems, and performs power adjustment that takes into account the supply and demand situation that changes from moment to moment, and can appropriately evaluate the incentive of the adjusted amount of load adjustment. It is an object to provide a system and a power suppression control method.

  In order to achieve the above object, a power suppression control system of the present invention is a database in which system information under a distribution substation, distributed power sources linked to the system, storage batteries, and load device information and operating states are stored. And a load suppression amount performed by discharging the storage battery, generating power from the distributed power source, and suppressing the load of the load itself to control the load adjustment amount of the distribution substation based on the database at each predetermined time, and the storage battery The amount of load creation that is created by charging the power source and starting the load that can be shifted in time is calculated, and the load adjustment amount required under the distribution substation is calculated based on the calculated load suppression amount and load creation amount. A first distribution calculation device (for example, distribution substation adjustment amount distribution calculation device 9) that distributes to each feeder under the distribution substation, and a load adjustment amount for each feeder based on the database at a predetermined time For controlling, the load suppression amount for each feeder and the load creation amount for each feeder are calculated, and the load adjustment amount transmitted from the first distribution calculation device is used as the calculated load suppression amount for each feeder and the feeder unit. A second distribution calculation device (for example, feeder adjustment amount distribution calculation device 7) that distributes to each pole transformer under the feeder on the basis of the load creation amount, and pole transformation based on the database at a predetermined time Calculating the load suppression amount for each pole transformer and the load creation amount for each pole transformer for controlling the load adjustment amount for each unit, and calculating the load adjustment amount transmitted from the second distribution calculation device. Based on the calculated load suppression amount for each pole transformer and the load creation amount for each pole transformer, it is distributed and controlled for each customer under the pole transformer, and the load adjustment amount for each consumer. Contribute to customer load adjustments And having a and the third distribution computing device for determining by using the load of the whole distribution substation (e.g., the pole transformer adjustment amount allocation calculating device 8).

  ADVANTAGE OF THE INVENTION According to this invention, while performing the load adjustment which considered the supply-and-demand condition which changes every moment, the incentive of the adjustment amount which adjusted the load can be evaluated appropriately.

It is a figure which shows the example of a structure of the electric power suppression control system which concerns on embodiment of this invention. It is a figure which shows the example of the calculation processing flow of an electric power suppression control system. It is a figure which shows an example of the load pattern of a feeder. It is a figure which shows an example of the plan value and track record value of the load adjustment amount of a feeder. It is a figure which shows an example of the load pattern of a pole transformer. It is a figure which shows an example of the plan value and track record value of the load adjustment amount of a pole transformer. It is a figure which shows an example of the load installation capacity under a pole transformer, and a kind.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating an example of a configuration of a power suppression control system according to an embodiment of the present invention. The distribution system is a system that supplies power from the distribution substation 6 to the load 12 (Ld) through the feeder breaker 5 (FCB), the feeder 50, and the pole transformer 3. The plurality of feeders 50 are connected to the storage battery 4 for the system and the distributed power source 11 for the system. In addition, a load 12, a customer storage battery 1, and a distributed power source 2 are connected to the system below the pole transformer 3. In addition, what consumes electric power when viewed from the distribution substation 6 is a load. For example, when the system storage battery 4 and the customer storage battery 1 function as the charging mode, they become loads.

  In the system under the pole transformer 3, a plurality of customer loads 12, customer storage batteries 1, and a distributed power source 2 are interconnected, but they are shown as schematic diagrams in FIG. 1. Details will be described later with reference to FIG.

  The power suppression control system 10 includes a distribution substation adjustment amount distribution calculation device 9 (first distribution calculation device), a feeder adjustment amount distribution calculation device 7 (second distribution calculation device), and a pole transformer adjustment amount distribution calculation. The apparatus 8 (third distribution calculation apparatus) includes a database 20.

  The database 20 includes a system DB 21, a storage battery DB 22, a distributed power supply DB 23, a customer control target device DB 24, and a contribution DB 25 (DB). Each DB includes the following information.

  In the system DB 21, (a) system configuration information (information on system configuration / distributed power supply, storage battery, and load linked to the system), (b) equipment information (bank capacity of distribution substation, feeder capacity, distributed type) Power capacity, storage battery capacity, pole transformer capacity, load capacity, etc.).

  The storage battery DB 22 includes storage battery information (SOC (State of Charge), charge output value, discharge output value of the storage battery 4 for the system). The distributed power supply DB 23 includes distributed power supply information (operation pattern of the distributed power supply 11 for the system, maximum output value of the power supply).

  The consumer control target device DB 24 includes customer control target device information (device information that can be controlled in the consumer device). Specifically, the charge / discharge state of the consumer storage battery 1 including information on which load the customer has among heat pumps, electric vehicles (EV), cogeneration, fuel cells, etc., and electric vehicles that can be charged and discharged. , Information on the SOC of the customer storage battery 1, heat pump operation information (remaining hot water storage), and information on the amount of power that can be output by a generator such as EV, cogeneration, or fuel cell.

  The contribution degree DB 25 includes the result of contribution degree calculated for each consumer. The contribution will be described later.

  The distribution substation adjustment amount distribution calculation device 9 controls the load adjustment amount of the distribution substation 6 based on the database 20 every predetermined time, and discharges of storage batteries, generation of distributed power sources, and the load itself. The load suppression amount performed by the load suppression and the load creation amount that creates the load by charging the storage battery and starting the load that can be shifted in time are calculated. Furthermore, the distribution substation adjustment amount distribution calculation device 9 calculates the load adjustment amount requested under the distribution substation 6 based on the calculated load suppression amount and load creation amount, as a feeder under the distribution substation 6. A command signal is transmitted to the feeder adjustment amount distribution calculation device 7.

  The feeder adjustment amount distribution calculation device 7 calculates a load suppression amount in units of feeders 50 and a load creation amount in units of feeders 50 for controlling the load adjustment amounts in units of feeders 50 based on the database 20 at predetermined times. To do. Furthermore, the feeder adjustment amount distribution calculation device 7 calculates the load adjustment amount transmitted from the distribution substation adjustment amount distribution calculation device 9 based on the calculated load suppression amount of the feeder 50 unit and the load creation amount of the feeder 50 unit. Then, the distribution is made for each pole transformer 3 under the feeder 50 and a command signal is transmitted to the pole transformer adjustment amount distribution calculation device 8.

  The pole transformer adjustment amount distribution calculation device 8 controls the load adjustment amount of the pole transformer 3 unit and the pillar for controlling the load adjustment amount of the pole transformer 3 unit based on the database 20 at every predetermined time. Calculate the load creation amount of 3 units of the upper transformer. Further, the pole transformer adjustment amount distribution calculation device 8 uses the load adjustment amount transmitted from the feeder adjustment amount distribution calculation device 7 as the calculated load suppression amount of the pole transformer 3 unit and the pole transformer 3 unit. Based on the load creation amount, the distribution is made for each consumer under the pole transformer, and a command signal is transmitted to each consumer.

  Moreover, the pole transformer adjustment amount distribution calculation device 8 can obtain the degree of contribution to the load adjustment amount for each consumer by a predetermined arithmetic expression (see Expressions (F1) to (F3)) described later.

Here, the load adjustment amount is defined as follows.
Load adjustment amount = Σload creation amount−Σload suppression amount (C1)
However, this is the case where the creation is positive.
Or
Load adjustment amount = Σload suppression amount−Σload creation amount (C2)
However, this is a case where the suppression is positive.

  As described above, load creation is performed by charging a storage battery (customer storage battery 1, grid storage battery 4), starting a load that can be shifted in time (such as a heat pump (HP) or an electric vehicle (EV)), and the like. That means. As described above, load suppression is performed by discharging a storage battery, generating power from a distributed power source, suppressing the load itself, or the like.

  A control outline of the present embodiment will be specifically described. For example, when a suppression signal (corresponding to load adjustment amount) of “10” (corresponding to load adjustment amount, shown as dimensionless) comes to distribution substation 6, distribution substation adjustment amount distribution calculation device 9 Based on the load state of the plurality of feeders 50, the feeder 50a transmits a command signal (feeder adjustment amount distribution command signal A3) for sharing the load suppression of “2”.

  The feeder adjustment amount distribution calculation device 7 sends a command signal (pillar transformation) to share the load suppression of “0.05” to the pole transformer 3a in the feeder 50a based on the state of the load connected to the feeder 50a. Device adjustment amount distribution command signal A1).

  Based on the state of the load, the pole transformer adjustment amount distribution calculation device 8 suppresses the load 12 by “0.05” based on the state of the load, or distributes the power source 2 and demand. The home storage battery 1 is output by “0.05”, or the load 12 is suppressed by “0.025”, and the distributed power source 2 and the consumer storage battery 1 only output “0.025”. A command signal (customer load adjustment command signal A6), such as whether to generate electricity, is transmitted. That is, the load is suppressed by adjusting the load 12 and adjusting the consumer storage battery 1 and the distributed power source 2. However, a command signal is issued so that the portion that cannot be covered by the constraints such as the equipment capacity is compensated by the load adjustment amount in the other pole transformer 3b.

  Next, the device configuration will be described in detail. The distribution substation adjustment amount distribution calculation device 9 appropriately grasps the load adjustment amount that can shift the demand among the loads of the consumers that change every moment in the distribution system. Then, the distribution substation adjustment amount distribution calculation device 9 performs a demand shift, and based on the database 20 including device information such as the bank capacity of the distribution substation 6, the load suppression amount of the distribution substation 6 unit or The load creation amount is calculated and held, and a load adjustment amount distribution calculation command signal is transmitted to each feeder 50.

  The feeder adjustment amount distribution calculation device 7 is based on device information such as the capacity of the feeder 50, the capacity of the storage battery 4 for the system connected to the feeder 50, and the capacity of the distributed power source 11 for the system such as photovoltaic power generation. The load suppression amount or load creation amount for each 50 is calculated and held, and a load adjustment amount distribution calculation command signal is transmitted to each pole transformer 3.

  The pole transformer adjustment amount distribution calculation device 8 has a capacity of the pole transformer 3, a capacity of the distributed power source 2 such as household solar power generation, a capacity of the consumer storage battery 1, a household heat pump and an electric vehicle, etc. Based on the load information that can shift demand, the load suppression amount or load creation amount of the pole transformer 3 units is calculated and held, and the contribution according to the supply and demand situation is calculated.

  The power suppression control system 10 receives device information A5 (A5a) in the distribution substation 6 from the distribution substation 6 every predetermined time (for example, every hour), stores it in the system DB 21, and feeds 50, device information A5 (A5b) of each device linked to 50 is received and stored in the system DB 21. In addition, the customer control target device information A5 (A5c) is received and stored in the customer control target device DB 24.

  The distribution substation adjustment amount distribution calculation device 9 transmits a feeder adjustment amount distribution command signal A3 to the feeder adjustment amount distribution calculation device 7, and receives device information A4 of feeders and connected devices from the feeder adjustment amount distribution calculation device 7. .

  The feeder adjustment amount distribution calculation device 7 transmits the pole transformer adjustment amount distribution command signal A1 to the pole transformer adjustment amount distribution calculation device 8, and the customer load and pillars are transmitted from the pole transformer adjustment amount distribution calculation device 8. The device information A2 of the upper transformer is received.

  FIG. 2 is a diagram illustrating an example of a calculation processing flow of the power suppression control system. This will be described with reference to FIG. The distribution substation adjustment amount distribution calculation device 9 of the power suppression control system 10 performs the load suppression amount of the entire distribution substation 6 in the pipe based on the above-described system DB 21 in the process S101 (distribution substation adjustment amount calculation). Alternatively, the load creation amount is obtained, and the load adjustment amount is obtained. Then, the distribution substation adjustment amount distribution calculation device 9 obtains the load suppression amount or the load creation amount for each feeder 50 and every time, and obtains the load adjustment amount. An example of the load pattern for each feeder 50 is shown in FIG.

  FIG. 3 is a diagram illustrating an example of a load pattern of the feeder. FIG. 4 is a diagram illustrating an example of the planned value and actual value of the load adjustment amount of the feeder. As shown in FIG. 3, the load changes from moment to moment. Therefore, as shown in FIG. 4, for example, if the load adjustment amount is given every hour, the load adjustment amount is distributed to each feeder 50, and the total becomes the load adjustment amount of the distribution substation 6. Here, the remaining capacity of the facility can be secured in advance by setting a plan value in accordance with the state of the facility such as a load or a storage battery.

  Returning to FIG. 2, the feeder adjustment amount distribution calculating device 7 then performs a pole transformer under the feeder 50 based on the system DB 21, the storage battery DB 22, and the distributed power supply DB 23 in the process S 102 (feeder adjustment amount distribution calculation). The load adjustment amount every 3 and every time is allocated and obtained.

  More specifically, considering the cross section at 12:00 shown in FIG. 4 (for example, the cross section at the time of 12:00), the feeder 1, feeder 2, and feeder 3 are 5 MW, 4 MW, and 3 MW, respectively. An adjustment amount was necessary. However, when the load adjustment amount of the feeder 1, the feeder 2 and the feeder 3 stacked from the pole transformer 3 side is 4 MW, 3 MW and 5 MW, respectively, it is found that the feeders 1 and 2 are each 1 MW short, The result of redistribution is the actual value. Here, the actual value feeder 3 has a margin of a load adjustment amount of 2 MW. For this reason, in the total amount of load adjustment amount, since the initial planned value and the actual value are the same 12 MW, it can be adjusted. As described above, the load adjustment amount once distributed with the original plan value can be compensated from other feeders by performing redistribution calculation in consideration of the state of the equipment.

  In FIG. 4, the load adjustment amount from 0 o'clock to 10 o'clock and 16:00 to 23:00 is 0 (zero) because the power suppression control system 10 of this embodiment increases the load during the day. This is because a control command is issued to cope with the increase, and the present invention is not limited to this.

  Returning to FIG. 2, next, the pole transformer adjustment amount distribution calculation device 8 performs the processing of S103 (pole transformer adjustment amount distribution calculation) in the consumer storage battery 1 (including chargeable / dischargeable electric vehicles and the like). Consumer control target device DB 24 including load data capable of demand shift such as SOC and capacity, heat pump hot water remaining amount and device information, and distributed power source DB 23 storing operation patterns of distributed power source 2 and the like Based on the above, the load adjustment amount of the consumer is obtained.

  The pole transformer adjustment amount distribution calculation device 8 determines whether or not the load adjustment amount can be adjusted based on the planned value of the load adjustment amount (see FIG. 6) (processing S104). If adjustment is possible (step S104, Yes), an instruction to execute load suppression or load creation including control of the customer storage battery 1 (see FIG. 1) is given to the customer's equipment (step S105). If it is not adjustable (No at Step S104), the process returns to Step S103 for redistribution of the load adjustment amount. The result of redistribution becomes the actual value of the load adjustment amount (see FIG. 6). The execution result of the process S105 is fed back to the process S101, and the post-execution device information is updated in the storage battery DB 22, the distributed power source DB 23, and the customer control target device DB 24.

  The pole transformer adjustment amount distribution calculation device 8 registers the execution result in the contribution DB 25 after executing load suppression or load creation of the load adjustment amount, and the contributions (formulas (F1) to (F3) described later) Based on the reference), the contribution is calculated (processing S106) and registered in the contribution DB 25.

  The consumer receives a contribution fee from the electric power company on a monthly basis, for example, based on the contribution. Thereby, an incentive can be given to a consumer.

The processing of the pole transformer adjustment amount distribution calculation device 8 will be further described.
The customer control target device DB 24 (see FIG. 2) determines which load the customer has among a heat pump (HP), an electric vehicle (EV), a cogeneration (cogeneration), a fuel cell and the like as shown in FIG. Information is stored. The consumer control target device DB 24 (see FIG. 2) stores the power generation amount and remaining amount (SOC and the like) that can be output such as EV, cogeneration, fuel cell, and the like, and is updated sequentially.

  FIG. 7 is a diagram illustrating an example of the load facility capacity and type under the pole transformer. Reference is made to FIG. 1 as appropriate. FIG. 7 shows a case where the capacity of the pole transformer 3 is 50 kVA and there are six customers below it. Under this condition, the power suppression control system 10 increases the surplus of the generated power of the photovoltaic power generation (PV) during the daytime, and creates a load when it is desired to suppress the voltage rise, thereby generating the surplus of the generated power of the PV. Can be suppressed.

  For example, charging is performed by causing the storage battery to function in the charging mode, and a load is created by cooking hot water with a heat pump. On the other hand, when the night load becomes large and it is desired to suppress the load, power generation is performed with a fuel cell, hot water is not cooked with a heat pump, or the storage battery is discharged to suppress the load.

  In addition, when a control command to suppress the load of 10 kW comes to the pole transformer 3a, the capacity of the cogeneration, fuel cell, heat pump (HP), electric vehicle (EV), and storage battery is 32 kW, of which 16 kW is half When the accommodation can be adjusted as the load adjustable amount, the load is suppressed to 10 kW by the pole transformer 3a that has received this control command, and 6 kW is accommodated via the feeder 50 to the other pole transformer 3b. It becomes possible.

  FIG. 5 is a diagram illustrating an example of a load pattern of the pole transformer. FIG. 6 is a diagram illustrating an example of the planned value and the actual value of the load adjustment amount of the pole transformer. Reference is made to FIG. 1 as appropriate. As shown in FIG. 5, the load changes from moment to moment. For this reason, as shown in FIG. 6, if the total amount of load adjustment is given every hour, for example, it is distributed to each pole transformer 3, and the total value becomes the load adjustment amount of the entire feeder. FIG. 6 shows an example in which three pole transformers 3 are connected to the feeder.

  More specifically, considering the cross section at 12 o'clock shown in FIG. 6 (for example, the cross section at 12 o'clock), in the planned value, the pole top Tr1, the pole top Tr2, and the pole top Tr3 of the pole transformer are as follows: The load adjustment amounts were 25 kW, 20 kW, and 15 kW, respectively. However, when the load adjustment amounts of the pole top Tr1, the pole Tr2 and the pole Tr3 stacked from the bottom of the pole transformer 3 are 25 kW, 15 kW, and 20 kW, respectively, it is found that the pole Tr2 lacks 5 kW. Therefore, the result of redistribution is the actual value. Here, there is a margin of 5 kW of load adjustment amount in the actual value column top Tr3. For this reason, in the total amount of load adjustment amount, since the initial plan value and the actual value are the same 60 kW, it can be adjusted.

  Similarly, when considering the cross section at 13:00, in the planned value, the load on the pole transformer Tr1, the pole Tr2 and the pole Tr3 of the pole transformer is 20 kW, 25 kW, and 25 kW, respectively. It was found that when the load adjustment amount of the pole top Tr1, the pole top Tr2 and the pole top Tr3 stacked from the bottom of the upper transformer 3 was 20 kW, 20 kW, and 30 kW, respectively, the pole top Tr2 was shorted by 5 kW. The result is the actual value. Here, there is a margin of adjustment amount of 5 kW on the pillar Tr3 of the actual value. For this reason, in the total amount of load adjustment amount, since the initial planned value and the actual value are the same 70 kW, they can be adjusted.

  Here, as with the load of the entire feeder, the remaining capacity of the facility can be secured in advance by setting a planned value in advance according to the state of the facility such as the load and the storage battery.

  If the load under the target pole transformer 3a cannot be adjusted, a redistribution calculation is performed to determine whether load control or load creation under another pole transformer 3b can be performed. Performs the calculation so as to secure the load adjustment amount in the entire feeder 50a with the assistance of the load adjustment of the other pole transformer 3b and the storage battery 4 for the system.

  If it is difficult to adjust the load in the entire feeder 50a, the load adjustment of the other feeder 50b is also performed, and the calculation is performed so that the load is adjusted in the entire distribution substation 6. By adjusting the load in this way, it is possible to make the most of the remaining equipment capacity.

  An upper power supply command station (not shown) makes a power generation plan such as a power plant, and executes a calculation in consideration of the power flow for each time zone. Next, when there is a shortage of power or when surplus occurs, a command value is issued for each substation at each time. The power suppression control system 10 apportions the capacity of the feeder 50 based on the command value and distributes the load adjustment amount in units of the feeder 50. Next, the load adjustment amount distributed in units of the feeder 50 is distributed for each equipment capacity of the pole transformer.

The contribution 1, the contribution 2, and the contribution 3 can be calculated from the load adjustment amount that is the load suppression or the load creation as described above, using the equations (F1) to (F3).

Contribution 1 = Load adjustment amount / Load amount of distribution substation as a whole (F1)
However, the load adjustment amount and the load amount of the distribution substation as a whole shall be the same time.

Contribution 2 = Load adjustment amount / Load adjustment amount of the distribution substation as a whole (F2)
However, the load adjustment amount and the load adjustment amount for the entire distribution substation shall be the same time.

Contribution 3 = Load adjustment amount / (Load adjustment amount of distribution substation as a whole x Load amount of distribution substation as a whole)
... (F3)
However, the load adjustment amount and the load adjustment amount and the load amount of the entire distribution substation shall be the same time.

  For example, when the load distribution of the entire distribution substation is 5 MW, the load adjustment amount of the entire distribution substation is 500 kW, and the load adjustment amount of a certain consumer is 1 kW, the contribution 1 is 1/5000, The contribution 2 is 1/500, and the contribution 3 is 1 / (5000 × 500). Any expression may be adopted as the expression of contribution. Based on the consumer's contribution, a contribution fee is paid from the power company. Thereby, an incentive can be given to a consumer.

  By calculating the degree of contribution as described above, in the case of Formula (F1), the adjustment amount according to demand, in the case of Formula (F2), the adjustment amount in the entire adjustment amount, and in the case of Formula (F3), the demand Therefore, it is possible to give an incentive to the load adjustment according to the supply and demand profile that changes over time and the contribution of the consumer.

  The power suppression control system 10 of the present embodiment includes a bank capacity of the distribution substation 6, a feeder capacity, a capacity of a distributed power source such as a storage battery for a system or a solar power generation connected to the system, a capacity of a storage battery for the system, etc. , A distribution substation adjustment amount distribution calculation device 9 that calculates and holds the load suppression amount or load creation amount of 6 units of distribution substation, and calculates the load suppression amount or load creation amount of feeder unit The feeder adjustment amount distribution calculation device 7 to be held and the capacity of the pole transformer stored in the consumer control target device DB 24 of the database 20, the capacity of the distributed power source such as household solar power generation, the household storage battery Based on the capacity of (for example, consumer storage battery 1) and load information on household heat pumps and electric vehicles, the load suppression amount or load creation amount of the pole transformer 3 unit is calculated. It was composed of the pole transformer adjustment amount allocation calculation device 8 for holding.

  The power suppression control system 10 calculates the load suppression amount and the creation amount in units of the distribution substation 6 to obtain the load adjustment amount, and further calculates the load adjustment amount to distribute the load adjustment amount to the feeder 50 unit. Furthermore, the load suppression amount and the load creation amount are calculated for each of the load adjustment amounts in units of three pole transformers. Furthermore, it is possible to recalculate whether the load adjustment amount calculated once can be covered by another pole transformer 3 or another feeder 50, and change the distribution value as necessary.

According to this embodiment as described above, the following effects can be expected.
(1) If distributed power sources such as photovoltaic power generation increase in the future, the voltage will increase depending on the situation of the power distribution system, and the output of the distributed power source must be suppressed. In order to maintain the power quality, a reactive power compensator such as SVC (Static Var Compensator) or a storage battery for adjustment on the system side may be required. For this reason, it is assumed that the distribution system will be strengthened. On the other hand, by suppressing or creating load in this embodiment, it is possible to sell power without reducing the power generation of distributed power sources as much as possible, and it is expected to reduce the countermeasure equipment of companies that hold system facilities such as power companies Can be.

(2) By dynamically grasping the customer's equipment, it is possible to suppress or create a load from among the available load equipment.
(3) The system facilities of (1) can be reduced, and the electricity rate can be reduced according to the contribution degree of the load of the consumer.
(4) If the demand for the target pole transformer cannot be controlled, it can be controlled by other pole transformers and other feeders, so it is not necessary to reduce power more than necessary. Equipment can be used effectively.

  As described above, due to the effects of the four points (1) to (4), the power quality of the power system can be maintained, the countermeasure facilities can be reduced, and the electricity charge of the consumer can be reduced.

  The power suppression control system 10 of the present embodiment is not limited to being owned by a power supply company integrated with shipping and distribution. For example, when there is an operating company for the distribution system, the operating company for the distribution system may own the power suppression control system 10. In this case, when the operating company of the power distribution system receives the power adjustment amount planned value from the power supply company, it may calculate the load adjustment amount in the time section and command the load adjustment amount to the power supply company.

DESCRIPTION OF SYMBOLS 1 Consumer battery 2 Distributed type power supply 3 Pillar transformer 3a Pillar transformer (1st pole transformer)
3b Pillar transformer (second pole transformer)
4 storage battery 5 feeder breaker (FCB)
6 Distribution substation 7 Feeder adjustment amount distribution calculation device (second distribution calculation device)
8 pole transformer adjustment amount distribution calculation device (third distribution calculation device)
9 Distribution substation adjustment amount distribution calculation device (first distribution calculation device)
10 Power Suppression Control System 11 Distributed Power Supply for System 12 Load (Ld)
20 Database 21 System DB
22 Storage battery DB
23 Distributed power supply DB
24 Consumer control target device DB
25 Contribution DB
A1 Column transformer adjustment amount distribution command signal A2 Consumer load and column transformer device information A3 Feeder adjustment amount distribution command signal A4 Feeder and connection device information A5 Device information A6 Customer load adjustment command signal

Claims (6)

A database in which system information under a distribution substation, distributed power sources connected to the system, storage batteries, and load device information and operating states are stored;
For each predetermined time, based on the database, to control the load adjustment amount of the distribution substation, the load suppression amount performed by discharging the storage battery, generating power of the distributed power source, and suppressing the load of the load itself, A load creation amount that creates a load by charging the storage battery and starting a load that can be shifted in time, and a load adjustment amount requested under the distribution substation is calculated as the calculated load suppression amount. A first distribution calculation device that distributes to each feeder under the distribution substation based on the load creation amount;
For each predetermined time, based on the database, a load suppression amount for the feeder unit and a load creation amount for the feeder unit for controlling a load adjustment amount for the feeder unit are calculated, and the first distribution calculating device A second distribution calculation device that distributes the load adjustment amount transmitted from each of the pole transformers under the feeder based on the calculated load suppression amount of the feeder unit and the load creation amount of the feeder unit;
At each predetermined time, based on the database, a load suppression amount for each pole transformer and a load creation amount for each pole transformer are calculated to control the load adjustment amount for each pole transformer. The load adjustment amount transmitted from the second distribution calculation device is calculated based on the calculated load suppression amount for each pole transformer and the load creation amount for each pole transformer. Distribution for each consumer, and a control command for each consumer, and the contribution to the load adjustment amount for each consumer, the load adjustment amount for the consumer and the load amount for the entire distribution substation And a third distribution calculation device to be obtained by using the power suppression control system. When the load adjustment amount of the first pole transformer cannot be satisfied, the third distribution calculation device reallocates the load adjustment amount of the second pole transformer to compensate by increasing the load adjustment amount. The power suppression control system according to claim 1. The third distribution calculation device suppresses the load adjustment amount of the load suppression distributed to the first pole transformer, or suppresses the load of the consumer itself, or the power generation output of the distributed power source of the consumer The power suppression control system according to claim 2, wherein at least one combination of increasing a battery output and a discharge output of a storage battery of the consumer is determined and a control command is given to the consumer. . The third distribution calculation device obtains the load adjustment amount of the consumer by dividing the load adjustment amount of the entire distribution substation when calculating the degree of contribution to the load adjustment amount for each consumer. The power suppression control system according to claim 1. When the third distribution calculation device calculates the degree of contribution to the load adjustment amount for each consumer, the load adjustment amount of the consumer is calculated using the load adjustment amount of the entire distribution substation and the distribution substation. The power suppression control system according to claim 1, wherein the power suppression control system is obtained by dividing by a value obtained by multiplying a load amount at a place. A power suppression control method for a power suppression control system that suppresses and controls a load,
The power suppression control system includes system information under a distribution substation, a distributed power source linked to the system, a storage battery, a database storing load device information and an operating state, a first distribution calculation device, 2 distribution calculation devices, a third distribution calculation device,
The first distribution calculation device is configured to control discharge of the storage battery, power generation of the distributed power source, and the load itself for controlling a load adjustment amount of the distribution substation based on the database at predetermined time intervals. The amount of load control performed by controlling the load and the amount of load created by charging the storage battery and starting the load that can be shifted in time are calculated, and the load adjustment amount requested under the distribution substation is calculated. Allocating to each feeder under the distribution substation based on the calculated load suppression amount and the load creation amount,
The second distribution calculation device calculates a load suppression amount for each feeder unit and a load creation amount for each feeder unit for controlling a load adjustment amount for each feeder unit based on the database at each predetermined time. And distributing the load adjustment amount transmitted from the first distribution calculation device for each pole transformer under the feeder based on the calculated load suppression amount for each feeder unit and the load creation amount for each feeder unit. ,
The third distribution calculation device is configured to control the load adjustment amount for each pole transformer and the pole transformer for controlling the load adjustment amount for each pole transformer based on the database at each predetermined time. The load creation amount for each unit is calculated, and the load adjustment amount transmitted from the second distribution calculation device is used as the load suppression amount for each calculated pole transformer and the load creation for each column transformer. The distribution is made for each customer under the pole transformer based on the amount, and the control command is given for each customer, and the contribution to the load adjustment amount for each consumer is determined by the load adjustment amount of the consumer and the power distribution. A power suppression control method characterized in that it is obtained using the load amount of the entire utility substation.

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