JP6505460B2 - Power management system, power management method and program - Google Patents

Description

  The present invention relates to a power management system, a power management method, and a program.

  In recent years, liberalization of the power retail market has been promoted, and power consumers have more options for purchasing power, and it is possible to purchase cheaper power.

  For consumers, as measures to control power consumption, measures are taken such as reducing the power by controlling the operation of home appliances or shifting the operation time from a time zone where power consumption is large to a time zone where power consumption is small (see below). See, for example, Patent Document 1 and Patent Document 2).

  On the other hand, there are many measures that depend on the individual environment of each customer's facility, power control by charge and discharge of storage battery, power generation by fuel cell, control by methods such as water heater to convert power into heat and store, It is superior either in terms of quantity or certainty compared to other examples. The effects of these heat storage and storage are large, and a mechanism for creating and controlling a plan for controlling distributed devices is provided (see, for example, Patent Document 3).

JP, 2006-74952, A Japanese Patent Application Laid-Open No. 11-346437 JP, 2014-168315, A

  In solar cells, there is a time zone in which generated power can not be supplied to other customer facilities, that is, a time zone in which there is no sunlight and generated power can not be obtained. For this reason, the solar cell may not be able to supply the generated power to other customer facilities in the time zone before midnight when the sun rises and the time zone in the early morning when the generated power when the sun starts rising is very small. . In the time zone after the early morning, at each of the customer premises, charging is performed at night according to the power of their own demand on the next day. Here, in the storage battery, the amount of power to be used up by the night of the next day at the customer facility is estimated, and the amount of power corresponding to the estimated demand power is stored. For this reason, it is not possible to supply surplus power to other customers in a time zone in which the solar cell can not generate power.

  The present invention has been made in view of such circumstances, and a power management system capable of supplying surplus power to other customer facilities even in a time zone in which the solar battery can not generate power, An object of the present invention is to provide a power management method and program.

One aspect of the power management system of the present invention connects a plurality of customer facilities including a first customer facility including a storage battery and a power generation apparatus as one of the electric facilities in a power management area to a common power supply, and surplus power The power management system for accommodating the demand facilities among the customer facilities, and forecasting the demand power per unit time on the target treatment date in the first demand facility, the unit on the target treatment day with respect to the other demand facilities by adding the supply-demand power is the power supplied for each time is predicted and the power consumption estimation unit which outputs as a prediction power demand, the originating Denden force per unit time in the target processing date in the first customer facility Calculating a difference between the predicted generated power and the predicted demand power for each unit time, and calculating the difference as the predicted surplus power. A power management plan creation unit that calculates a predicted integrated surplus power obtained by integrating the predicted surplus power, and generates a power management plan, and obtaining the unit time at which the predicted integrated surplus power indicates the lowest value; And a power management plan correction unit configured to obtain the storage power amount for the storage battery from the system power supply so as to obtain the storage battery capacity, and to change the predicted surplus power.

In one aspect of the power management system according to the present invention, the power management plan correction unit determines a demand demand power amount for charging the stored power amount per unit time within a predetermined time period, and the predicted integration surplus is calculated according to the demand demand power amount. and correcting the power.

  In one aspect of the power management system of the present invention, the power management plan correction unit calculates a storage time required to charge the storage battery from the system power supply to the storage power amount, and for the time to start charging The charging completion time is calculated by adding the storage time.

In one aspect of the power management system of the present invention, the power management plan correction unit calculates the amount of stored power stored in the storage battery by the time of performing demand supply to the other customer facility, characterized in that said stored power amount is performed whether Nay Kano determination satisfies said supply Deman de power.

  One aspect of the power management system of the present invention is characterized in that the other customer facility includes a customer facility in the power management area and a customer facility outside the power management area.

  In one aspect of the power management system according to the present invention, the power management plan correction unit obtains an available supply power amount in response to a supply request for the supply demand power from a customer facility outside the power management area and outputs the power It is characterized by

One aspect of the power management method according to the present invention is a power supply common to a plurality of customer facilities including a first customer facility including a storage battery and a power generation apparatus connected to a system power supply and including an accumulator and a power generation apparatus as one of electric facilities connected to a power management method mutual interchange surplus power between the customer facility, the power consumption estimation unit predicts the demand power per unit time in the target processing date in the first customer facility, A demand power estimation process of adding supply demand power which is power to be supplied per unit time on a target processing day to another customer facility and outputting it as forecast demand power; and generated power estimation process for outputting a calling DENDEN force per unit time in the target processing date in house facility as the predicted power generation by predicting, power management planning unit, the prediction generated power and the previous A power management plan generation process of obtaining a difference for each unit time of each of the predicted demand power, setting the difference as a predicted surplus power, calculating a predicted integration surplus power obtained by integrating the predicted surplus power, and generating a power management plan; The power management plan correction unit obtains the unit time in which the predicted integrated surplus power indicates the lowest value, and obtains the storage power amount for the storage battery from the system power supply so that the lowest value becomes the discharge termination storage battery capacity And a power management plan correction process of changing power.

One aspect of the program of the present invention is to connect a plurality of customer facilities including a first customer facility including a storage battery and a power generator as one of the electric facilities in a power management area to a common power supply. and a program for executing operations of the computer's power management system which mutual flexibility between the customer facility surplus power, the computer, the demand power per unit time in the target processing date in the first customer facility Demand power estimation means for predicting and outputting as demand demand power by adding supply demand power which is power to be supplied per unit time on a target processing day to another customer facility, the above-mentioned in the first customer facility generated power estimation means for outputting an outgoing DENDEN force per unit time as the predicted power generation by predicting the target process date, the predicted generated power and the Power management plan generation means for obtaining a difference for each unit time of measured demand power, taking this difference as predicted surplus power, calculating predicted integrated surplus power obtained by integrating predicted surplus power, and generating a power management plan, Power management plan correction for determining the unit time at which the predicted integrated surplus power shows the lowest value, obtaining the stored power amount for the storage battery from the system power supply so that the lowest value becomes the discharge termination storage battery capacity, and changing the predicted surplus power It is a program for functioning as a means.

  According to the present invention, it is possible to provide a power management system, a power management method, and a program capable of supplying surplus power to other customer facilities even in a time zone in which the solar cell can not generate power. it can.

It is a figure showing an example of composition of a power management system by a 1st embodiment of the present invention. It is a figure which shows the structural example of the electric equipment with which one consumer facility 10 is equipped. It is a figure which shows the structural example of the power management apparatus 200 in 1st Embodiment. It is a figure which shows the structural example of the power management plan table memorize | stored in the memory | storage part 236. FIG. It is a figure which shows an example of the pattern figure of the power management plan produced by the power management plan preparation part 233. FIG. It is a figure which shows an example of the pattern diagram of the electric power management plan which the electric power management plan correction | amendment part 235 performed the correction process corresponding to the demand prediction of customer facility itself. It is a figure which shows an example of the pattern figure of the power management plan produced by the power management plan preparation part 233. FIG. It is a figure which shows an example of the pattern diagram of the electric power management plan which the electric power management plan correction | amendment part 235 performed the correction process corresponding to the supply demand electric energy with respect to a customer's installation. It is a figure which shows another example of the pattern diagram of the electric power management plan which the electric power management plan correction | amendment part 235 performed the correction process corresponding to the supply demand electric energy with respect to a customer's installation. It is a flowchart which shows the operation example of the process which produces | generates the power management plan by the power management system of this embodiment. It is a flowchart which shows the operation example of the process which correct | amends the electric power management plan by the electric power management system of this embodiment. It is a flowchart which shows the operation example of the process which correct | amends the electric power management plan by the electric power management system of this embodiment.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a power management system according to a first embodiment of the present invention. The power management system in the present embodiment collectively manages power in consumer facilities such as housing, commercial facilities, and industrial facilities corresponding to a plurality of consumers in a predetermined area range (power management area), for example. is there. Such a power management system corresponds to what is called, for example, a Town Energy Management System (TEMS) or a Community Energy Management System (CEMS).

The power management system according to the present embodiment performs power management on electric facilities provided for each of a plurality of customer facilities 10 in a certain range of areas shown as the power management area 1 in FIG. 1.
The customer facility 10 corresponds to, for example, a house, a commercial facility, or an industrial facility. For example, the power management area 1 may correspond to one or more apartment buildings, and each of the customer facilities 10 may be each door in the apartment complex.

The position of the customer facility 10 may not be limited to the same area as other customer facilities that are similarly managed as long as the power management system is configured to manage. The power management system is registered as a customer facility 10 under its own management, and if it can transmit and receive information to be managed using a network 300 described later, different regions (for example, Hokkaido, Honshu, Kyushu, Shikoku, etc.) A group of a plurality of customer premises 10 registered in each region of
A common power supply is a power supply which can supply electric power through the electric wire connected with each consumer, and may be comprised from a commercial power supply, the power supply in the area, and these plural.
In FIG. 1, common power supplies are the commercial power supply 2 and the system power supply 3. Since one or more of the customer facilities are power supply sources, the system power supply 3 includes each of the customer facilities 10 and a collection of power supply lines in the area connected to the facility 10.

  The plurality of customer facilities 10 in the power management area 1 shown in FIG. 1 include the customer facilities 10 provided with solar cells that are power generation devices that generate electric power using renewable energy. The plurality of customer facilities 10 in the power management area 1 include the customer facilities 10 provided with a storage battery as one of the electrical facilities. Among such customer facilities 10, there may be a customer facility 10 provided with both a solar cell and a storage battery, or there may be a customer facility 10 provided with any one of a solar cell and a storage battery. It is also good.

The commercial power supply 2 is branched and supplied to each customer facility 10 in the power management area 1 by being connected to the common system power supply 3. Each customer facility 10 can supply the power with the power supplied from the system power supply 3. As a result, various electrical facilities (devices) as loads are operated.
The customer facility 10 including a solar cell (a solar cell 101 described later) can output the generated power of the solar cell to the system power supply 3.
In the customer facility 10 provided with a storage battery (a solar cell 103 described later), power can be supplied from the system power supply 3 to store (charge) the storage battery. In the customer facility 10 provided with the storage battery and the solar battery, not only receiving power supply from the system power supply 3 and storing it in the storage battery, it is possible to charge the storage battery with the generated power of the solar battery.

A power management apparatus 200 is provided in the power management system of the present embodiment.
The power management apparatus 200 executes power management on the electric equipment in each customer facility 10 belonging to the power management area 1. For this purpose, the power management apparatus 200 in FIG. 1 is connected to be able to mutually communicate with each of the customer facilities 10 via the network 300. Thereby, the power management apparatus 200 can control the electrical installation in each customer facility 10.

  In FIG. 1, the power management apparatus 200 is connected to the system power supply 3, but the power management apparatus 200 and the system power supply 3 are not connected, for example, when the customer facilities 10 are provided in different areas. good. In this case, since the power management apparatus 200 and each customer facility 10 are connected via the network 300, the information of the system power supply 3 to which each customer facility 10 is connected via the network 300 is The power management apparatus 200 is configured to be obtained from the customer facility 10.

  Next, with reference to FIG. 2, an example of the electrical installation with which one customer facility 10 is provided will be described. FIG. 2: is a figure which shows the structural example of the electric equipment with which one consumer facility 10 is provided. Here, FIG. 2 has shown the structural example of the electric equipment with which the customer's installation 10 is equipped. In FIG. 2, the customer facility 10 includes each of a solar cell 101, a power conditioner 102, a storage battery 103, an inverter 104, a power path switching unit 105, a load 106, and a facility-by-facility control unit 107 as electrical equipment. .

The solar cell 101 is one of power generation devices using solar light, which is renewable energy, and generates electric power by converting light energy into electric power by the photovoltaic effect. The solar cell 101 is installed in a place where sunlight is difficult to be shielded by other buildings, such as the roof of the customer premises 10, for example. As a result, the solar cell 101 is irradiated with sunlight without shielding the surface on which the power generation element is disposed, and the irradiated sunlight is efficiently converted into electric power.
The power conditioner 102 is provided corresponding to the solar cell 101, and converts direct current power output from the solar cell 101 into alternating current power of voltage and frequency corresponding to the specification of the power input of the load.

  The inverter 104 is provided corresponding to each of the plurality of storage batteries 103, and converts the AC power into a DC power as power for charging the storage battery 103 or outputs the power from the storage battery 103 by discharging, Convert DC power into AC power. That is, inverter 104 performs bidirectional conversion between direct current power or alternating current power input / output from storage battery 103.

When the storage battery 103 is charged, AC power for charging is supplied from the commercial power supply (also referred to as a system power supply) 2 or the power conditioner 102 to the inverter 104 via the power path switching unit 105. The inverter 104 converts the AC power thus supplied into DC power and supplies the DC power to the storage battery 103.
When the storage battery 103 is discharged, direct-current power is output from the storage battery 103. The inverter 104 converts the DC power output from the storage battery 103 into AC power and supplies the AC power to the power path switching unit 105.

The power path switching unit 105 switches the power path according to the control of the facility-based control unit 107. At this time, the facility control unit 107 can control the power path switching unit 105 in accordance with an instruction from the power management apparatus 200.
According to the above control, the power path switching unit 105 can form a power path so as to supply the commercial power source 2 to the load 106 in the same customer facility 10.

The power path switching unit 105 can form a power path so that the power generated by the solar cell 101 can be supplied from the power conditioner 102 to the load 106 in the same customer facility 10.
Power path switching unit 105 can form a power path so that power supplied from one or both of commercial power supply 2 and solar cell 101 can be charged to storage battery 103 via inverter 104 in the same customer facility 10. .

The power path switching unit 105 can form a power path so as to supply the power output from the storage battery 103 by discharging in the same customer facility 10 to the load 106 via the inverter 104.
Furthermore, the power path switching unit 105 forms a power path so as to supply the power generated by the solar cell 101 to the storage battery in another customer facility 10, for example, via the power system of the commercial power supply 2. can do.
The power path switching unit 105 can form a power path so as to supply the power output by the discharge of the storage battery 103 to the load 106 in another customer facility 10.

The load 106 is configured to include one or more devices, facilities, and the like that consume power in order for the customer facility 10 to operate.
The facility-by-facility control unit 107 controls the electrical facilities (all or part of the solar battery 101, the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106) in the customer facility 10.

  The power management apparatus 200 shown in FIG. 1, which has already been described, executes power management on electric facilities in the entire customer facility 10 belonging to the power management area 1. For this purpose, the power management apparatus 200 is connected to each of the facility-specific control units 107 in the customer facility 10 so as to be able to communicate with each other via the network 300. Thus, the facility-based control unit 107 can control each of the electrical facilities of the customer facility 10 under its control in accordance with the control of the power management apparatus 200.

The facility-based control unit 107 may be omitted, and the power management apparatus 200 may directly control the electrical installation and the like in each customer facility 10. However, as in the present embodiment, by providing the power management apparatus 200 and the facility-by-facility control unit 107, the control of the entire power management area 1 and the customer facility 10 can be hierarchically structured. The complication of control of the management apparatus 200 can be avoided.
As described above, some of the customer facilities 10 in the power management area 1 may not include, for example, the solar cell 101, the storage battery 103, and the inverter 104.

During the daytime, while power is generated by the solar cell 101, for example, in a state where the number (number of people) of people present in the customer facility 10 is small, the power consumption of the load 106 is considerably reduced. . In such a state, the total amount of power generated by the solar cells 101 in the entire power management area 1 may exceed the total amount of power required by the loads 106 in the same entire power management area 1. In such a case, even if power generated by the solar cells 101 in the entire power management area 1 is supplied to the load 106 in the entire power management area 1, surplus power is generated in the power of the solar cells 101 in the entire power management area 1.
It is preferable that the surplus power generated in this way can be effectively used if it is charged and stored in, for example, the storage battery 103 installed in the power management area 1.

  When the surplus power of the generated solar cell 101 is small, the power to be stored in the storage battery 103 is also small. The inverter 104 has a characteristic that the power loss is small when the power is above a certain level, but the power loss is remarkable when the power is below a certain level.

For this reason, if small surplus power of each solar cell 101 generated in power management area 1 is distributed to, for example, storage battery 103 for each customer facility 10 and charged, the power of each inverter 104 is considerably small. Become. In this case, the power loss of each inverter 104 is significantly increased.
Even if the surplus power of the solar cell 101 is charged to the storage battery 103 individually for each customer facility 10, the above problem similarly occurs. Such a problem of power loss in the inverter 104 similarly occurs when the discharged power of the storage battery 103 is small when the power discharged from the storage battery 103 is supplied to the load 106 in the power management area 1.

Therefore, the power management apparatus 200 according to the present embodiment performs the charging or discharging of the storage battery 103 of the customer facility 10 in the power management area 1, as will be described later. The surplus power of the whole 10 is combined, and the charge / discharge operation for the storage battery 103 provided in a predetermined customer facility 10 is controlled while reducing the power loss of the inverter 104.
The control of the charge / discharge operation of the storage battery 103 described below involves distribution of charge power from the solar cell 101 to the storage battery 103 in the power management area 1 or distribution of power from the storage battery 103 to the load 106. Therefore, control of charge / discharge operation for storage battery 103 described below is also referred to as power distribution control.

Next, a configuration example corresponding to the power distribution control of the power management apparatus 200 will be described with reference to FIG. FIG. 3 is a diagram showing a configuration example of the power management apparatus 200 in the first embodiment. The power management apparatus 200 includes a network I / F unit 201, a power management unit 202, and a power management planning unit 203, corresponding to power distribution control.
The network I / F unit 201 transmits and receives various data between the facility-based control unit 107 of each customer facility 10 and the power management apparatus 200 in another power management area via the network 300.

The power management unit 202 executes predetermined power management for electric facilities in a plurality of customer facilities 10 in the power management area 1.
The power management performed by the power management unit 202 in the present embodiment is the above-described power distribution control for reducing the loss of the inverter 104 in each customer facility 10.
The power management planning unit 203 creates a power management plan for each customer facility 10 and causes the facility control unit 107 to execute the power management plan.

The power management unit 202 illustrated in FIG. 3 includes a total power calculation unit 221, a distribution power determination unit 222, a distribution control unit 223, and an inverter efficiency characteristic storage unit 224.
The total power calculating unit 221 is a total power to be charged to a group of a plurality of storage batteries 103 (total charging power) or a total power to be discharged from a group of a plurality of storage batteries 103 in a power management area 1 (discharge total power) Calculate Note that, hereinafter, when there is no particular distinction between charged total power and discharged total power, it is referred to as total power.

The distributed power determination unit 222 determines at least one storage battery 103 as a distribution target of total power from among the storage batteries 103 of the plurality of customer facilities 10 based on the inverter efficiency characteristic of each inverter 104. At the same time, the distributed power determination unit 222 determines the distributed power to be distributed for each of the storage batteries 103 in the customer facility 10 as the determined distribution target.
The distribution control unit 223 controls so that the determined distributed power is distributed to each of the storage batteries 103 of each customer facility 10 as a distribution target.

The inverter efficiency characteristic storage unit 224 stores in advance the inverter efficiency characteristic of each inverter 104 used by the distributed power determination unit 222. In other words, the inverter efficiency characteristic storage unit 224 stores the inverter efficiency characteristic of each inverter 104 provided in the power management area 1.
One inverter efficiency characteristic shows the fluctuation characteristic of the efficiency according to the power about corresponding inverter 104. Then, the inverter efficiency characteristic storage unit 224 stores the inverter efficiency characteristic of each inverter 104 in the power management area 1 so as to be stored in the inverter efficiency characteristic table.

The power management plan unit 203 shown in FIG. 3 includes a power consumption estimation unit 231, a generated power estimation unit 232, a power management plan creation unit 233, a demand input unit 234, a power management plan correction unit 235, and a storage unit 236. And have.
The power consumption estimation unit 231 determines the power amount pattern of the power consumption as the predicted value of the power consumption of the next day from the history of the power consumption in the customer facility 10 and the data of the weather forecast of the next day (power demand pattern The predicted amount is a predetermined time interval (every day, every hour, every minute, etc., hereinafter referred to as a time interval, for example, every one minute in this embodiment), and the obtained power amount pattern of power consumption is It is written and stored in the storage unit 236 as part of a power control estimation pattern to be described later.

  At this time, as an example of obtaining a power pattern as a predicted value of power consumption, the power consumption estimation unit 231 determines a day where weather and temperature in a range of the same season as the day to be predicted are within a predetermined set range. A calculation is made to select and average the power consumption of the selected day, and let the average value obtained from this calculation be the predicted demand power of the next day. The predicted demand power is a demand energy pattern for each unit time. The unit time is a time period of an arbitrarily set width, and is, for example, 30 minutes of the demand time. The power consumption estimation unit 231 writes and stores the predicted demand power at a predetermined address of the storage unit 236, and identifies each of the customer facilities in the power management plan table of the storage unit 236 as the predicted demand power address. Write and store in correspondence with the customer facility identification information.

  The generated power estimation unit 232 is a generated energy pattern for each unit time of the generated power generated by the solar cell 101 on the next day, from the generated energy pattern of the generated power of the same season and the same season as that of the next day. Estimate the predicted power generation. The generated power estimation unit 232 writes the predicted generated power into a predetermined address of the storage unit 236 and stores the address as the predicted generated power address in the power management plan table of the storage unit 236, and makes the customer facility identification information correspond. Write and store.

The power management plan creation unit 233 obtains the difference between the predicted generated power and the predicted demand power for each unit time, that is, subtracts the predicted demand power from the unit predicted generated power, and sets the subtraction result as the predicted surplus power.
The power management plan creating unit 233 sequentially integrates the estimated surplus powers to calculate estimated integrated surplus powers. In the present embodiment, the estimated integrated surplus power indicates the amount of stored power of the storage battery 103 per unit time (the difference between the estimated amount of generated power and the predicted demand energy is the amount of power charged to the storage battery 103). There is.

Here, at the time point when the power generation of solar cell 101 is started, power management plan creation unit 233 stores the stored power amount of storage battery 103, that is, the estimated integrated surplus power as the discharge termination storage battery capacity (for example, SOC (state of charge) 20). Make a power management plan as%). In the present embodiment, the SOC 20% is described by expressing the discharge termination storage battery capacity as "0".
The power management plan creating unit 233 makes each of the predicted surplus power address and the predicted cumulative surplus power address correspond to the customer facility identification information, which is an address at which each pattern of the predicted surplus power and the predicted cumulative surplus power is stored. The power management plan table of the storage unit 236 is written and stored.

  FIG. 4 is a diagram showing a configuration example of the power management plan table stored in the storage unit 236. As shown in FIG. In FIG. 4, each of a predicted demand power address, a predicted generated power address, a predicted surplus power address, and a predicted integration surplus power address is written in the power management plan table corresponding to the customer facility identification information. The predicted demand power address indicates an area in the storage unit 236 in which a power pattern, which is a predicted demand power value for each unit time of predicted demand power of a customer facility indicated by corresponding customer facility identification information, is written.

  The predicted generated power address indicates an area in the storage unit 236 in which a power pattern, which is a predicted generated power value for each unit time of predicted generated power of a customer facility indicated by corresponding customer facility identification information, is written. The predicted surplus power address indicates an area in the storage unit 236 in which a power pattern which is a predicted surplus power value for each unit time of predicted surplus power of the customer facility indicated by the corresponding customer facility identification information is written. The predicted integrated surplus power address indicates an area in storage unit 236 in which a power pattern, which is a predicted integrated surplus power value for each unit time of predicted integrated surplus power of the customer facility indicated by the corresponding customer facility identification information, is written. ing.

  Returning to FIG. 3, the power management plan correction unit 235 corrects the power management plan of each of the customer facilities 10 included in the power management area 1. The predicted integrated surplus power of each customer facility 10 included in the power management area 1 is read out, and the time of the unit time at which the predicted integrated surplus power value becomes the lowest is detected. Then, when the lowest estimated integrated surplus power value is less than or equal to 0 in each of the customer facilities 10, the power management plan correction unit 235 determines that the lowest estimated integrated surplus power value is equal to 0, The power capacity of the initial value of the estimated integrated surplus power value of is set. The power capacity is a storage capacity that causes the storage battery 103 to be charged by nighttime power before the day is started.

In the case of a customer facility without the storage battery 103 or a customer facility with a small capacity of the storage battery 103, it is necessary to have the power supplied from another customer facility 10 having surplus power. For this reason, the power management plan correction unit 235 sets the power supplied to the customer facility whose minimum integrated surplus power value is less than 0 even after the correction as the internally supplied demand power.
Then, the power management plan correction unit 235 distributes the internally supplied demand power to the customer facility 10 (surplus consumer) whose minimum accumulated surplus power value is zero.

  At this time, the power management plan correction unit 235 predicts the predicted demand in the power management plan of the surplus consumer to which all or a part of the internally supplied demand power is distributed, for the power value of unit time at each time in internally supplied demand power. It is added to the power value of the unit time of the time corresponding to the power, and correction is performed to obtain the predicted demand power including the internally supplied demand power.

  Then, the power management plan correction unit 235 subtracts the predicted demand power corrected from the predicted power generation for each unit time to obtain a new predicted surplus power. The power management plan correction unit 235 adds the power value of the predicted surplus power of the time unit of each time to the time series, and calculates a new predicted integrated surplus power. Next, the power management plan correction unit 235 detects the unit time of the time when the estimated integrated surplus power value, which is the power value of the estimated integrated surplus power, becomes the lowest. The power management plan correction unit 235 sets the power capacity of the initial value of the predicted integrated surplus power value such that the lowest predicted integrated surplus power value becomes zero.

  FIG. 5 is a diagram showing an example of a pattern diagram of the power management plan created by the power management plan creation unit 233. As shown in FIG. In FIG. 5, the first vertical axis (vertical axis on the left side of the figure) shows the amount of power every 30 minutes, the second vertical axis (vertical axis on the right side of the figure) shows remaining battery capacity, and the horizontal axis It shows the time. In FIG. 5, a solid line indicates a pattern of surplus integrated prediction (predicted integrated surplus power), a dotted line indicates a pattern of power generation prediction (predicted power generation), and an alternate long and short dash line indicates a pattern of demand prediction (predicted demand power). The dotted line indicates the pattern of the surplus prediction (predicted surplus power). Each of the power generation forecast demand forecast and the surplus forecast corresponds to the first vertical axis, and the surplus integrated forecast corresponds to the second vertical axis.

  In this embodiment, each pattern of the forecast demand forecast, forecast power generation forecast, forecast surplus forecast and forecast integration surplus forecast from 6 o'clock (6 am to 11:00 pm) is created as a power management plan Be done. And charge in the night to storage battery 103 mentioned below is performed before 6:00 when demand of electric power in customer facility 10 is started. In order to store electricity at nighttime electricity rates, the solar cell 101 can not generate electric power because there is no sunshine before sunrise, and the storage battery 103 is charged by the time the demand for electric power is started.

  The power management plan creating unit 233 generates a surplus forecast by subtracting the pattern of the demand forecast estimated by the power consumption estimation unit 231 from the pattern of the power generation estimation estimated by the generated power estimation unit 232 for each unit time. . The pattern of the surplus integration prediction is obtained by the power management plan creation unit 233 sequentially accumulating the power amount of the surplus prediction for each unit time (30 minutes). However, since the power amount (Wh) of the surplus prediction for 30 minutes (for each unit time) is integrated, the integrated value is doubled with respect to the time (60 minutes) if it is the integrated value as it is. The integrated value is indicated by the electric energy (kWh) divided by 2. The pattern of this surplus integrated prediction indicates the storage battery remaining capacity stored in the storage battery 103.

  Here, the power management plan correction unit 235 determines whether the minimum value of the surplus integrated prediction after 6 o'clock is negative. In FIG. 5, the surplus integrated prediction becomes the lowest value at 8:30 am, and the lowest value is a negative value of -5 kWh. Therefore, as described later (FIG. 6), the power management plan correction unit 235 corrects the power management plan created by the power management plan creation unit 233 so that the minimum value of the surplus integration prediction in FIG. Do.

  FIG. 6 is a diagram showing an example of a pattern diagram of the power management plan in which the power management plan correction unit 235 has performed the correction processing corresponding to the demand forecast of the customer facility itself. In FIG. 6, the first vertical axis (vertical axis on the left side of the figure) shows the amount of power every 30 minutes, the second vertical axis (vertical axis on the right side of the figure) shows remaining battery capacity, and the horizontal axis It shows the time. In FIG. 6, a solid line indicates a pattern of surplus integrated prediction (predicted integrated surplus power), a dotted line indicates a pattern of power generation prediction (predicted power generation), and an alternate long and short dash line indicates a pattern of demand prediction (predicted demand power). The dotted line indicates the pattern of the surplus prediction (predicted surplus power). Each of the power generation forecast demand forecast and the surplus forecast corresponds to the first vertical axis, and the surplus integrated forecast corresponds to the second vertical axis.

  Here, the power management plan correction unit 235 determines whether or not the lowest value of the surplus integration prediction after 6 o'clock is negative, and if the surplus integration prediction is negative, the pattern of the surplus integration prediction is negative. Is obtained as the correction power amount, and this power amount is added to the initial value of the surplus integrated prediction (calculation of target charge power). Create a plan to charge the storage battery 103 from 3:30 am using the nighttime power of the system power supply for the amount of power consumed in the time zone where the solar cell 101 can not generate power, such as early morning when solar sunshine can not be obtained . In FIG. 6, from 6 am to 6:30 am, from 6:30 am to 7 am, from 7 am to 7:30 am, from 7:30 am to 8 am, from 8 am to 8 am Change to a plan to discharge approximately 300 w for every 30 minutes of 30 minutes. In this example, 300 w is continuously supplied for 2 hours and 30 minutes, and approximately 750 wh is supplied from the storage battery 103 corresponding to the amount of demand power supplied.

The power management plan correction unit 235 determines whether the lowest value of the surplus integration prediction is negative, and does not perform processing for changing the surplus integration prediction when the surplus integration prediction is positive. As can be seen from FIG. 6, in the time period (6 o'clock to 8:30) when the demand forecast is started, the solar cell 101 can not generate power, and the power forecast is lower than the demand forecast. Since this is negative and the surplus integrated forecast is reduced, it can be seen that this power is covered by the discharge from the storage battery 103.
Here, the pattern of this surplus integrated prediction indicates the storage battery remaining capacity stored in storage battery 103.

  FIG. 7 is a diagram showing an example of a pattern diagram of the power management plan created by the power management plan creation unit 233. As shown in FIG. In FIG. 7, the first vertical axis (the vertical axis on the left side of the figure) shows the amount of power every 30 minutes, the second vertical axis (the vertical axis on the right side of the figure) shows the remaining battery capacity, and the horizontal axis It shows the time. In FIG. 7, a solid line indicates a pattern of surplus integrated prediction (predicted integrated surplus power), a dotted line indicates a pattern of power generation prediction (predicted power generation), and an alternate long and short dashed line indicates a pattern of demand prediction (predicted demand power). The dotted line indicates the pattern of the surplus prediction (predicted surplus power). Each of the power generation forecast demand forecast and the surplus forecast corresponds to the first vertical axis, and the surplus integrated forecast corresponds to the second vertical axis.

  In this embodiment, each pattern of the forecast demand forecast, forecast power generation forecast, forecast surplus forecast and forecast integration surplus forecast from 6 o'clock (6 am to 11:00 pm) is created as a power management plan Be done. And charge in the night to storage battery 103 mentioned below is performed before 6:00 when demand of electric power in customer facility 10 is started. In order to store electricity at nighttime electricity rates, the solar cell 101 can not generate electric power because there is no sunshine before sunrise, and the storage battery 103 is charged by the time the demand for electric power is started.

  The power management plan creating unit 233 generates a surplus forecast by subtracting the pattern of the demand forecast estimated by the power consumption estimation unit 231 from the pattern of the power generation estimation estimated by the generated power estimation unit 232 for each unit time. . The pattern of the surplus integration prediction is obtained by the power management plan creation unit 233 sequentially accumulating the power amount of the surplus prediction for each unit time (30 minutes). However, since the power amount (Wh) of the surplus prediction for 30 minutes (for each unit time) is integrated, the integrated value is doubled with respect to the time (60 minutes) if it is the integrated value as it is. The integrated value is indicated by the electric energy (kWh) divided by 2. The pattern of this surplus integrated prediction indicates the storage battery remaining capacity stored in the storage battery 103.

  Here, the power management plan correction unit 235 determines whether the minimum value of the surplus integrated prediction after 6 o'clock is negative. And in FIG. 7, the surplus integrated prediction becomes the lowest value at 8:00 am, and the lowest value is negative of -4906 Wh. Therefore, as described later (FIG. 8), the power management plan correction unit 235 corrects the power management plan created by the power management plan creation unit 233 so that the minimum value of the surplus integrated forecast in FIG. Do.

  FIG. 8 is a diagram showing an example of a pattern diagram of a power management plan in which the power management plan correction unit 235 has performed correction processing corresponding to the amount of power demand for supply to a customer facility. In FIG. 8, the first vertical axis (vertical axis on the left side of the figure) shows the amount of power every 30 minutes, the second vertical axis (vertical axis on the right side of the figure) shows remaining battery capacity, and the horizontal axis It shows the time. In FIG. 8, a solid line indicates a pattern of surplus integrated prediction (predicted integrated surplus power), a dotted line indicates a pattern of power generation prediction (predicted power generation), and an alternate long and short dash line indicates a pattern of demand prediction (predicted demand power). The dotted line indicates the pattern of the surplus prediction (predicted surplus power). Each of the power generation forecast demand forecast and the surplus forecast corresponds to the first vertical axis, and the surplus integrated forecast corresponds to the second vertical axis.

  The power management plan correction unit 235 performs the correction based on the demand forecast of the customer facility shown in FIG. 6, and thereafter, the demand that is the amount of power of the power to be provided to other customer facilities in the power management area 1 Make corrections corresponding to the demand energy. At this time, the power management plan correction unit 235 selects, from among the customer facilities 10 in the power management plan table of the storage unit 236, the customer facility 10 whose maximum value of the surplus integration prediction is less than the maximum storage capacity of the storage battery. The power supply demand electric energy in the power management area 1 is distributed to these.

  Here, the power management plan correction unit 235 adds the supplied power demand electric energy to the demand forecast pattern of the customer facility 10 of the distribution destination for each unit time of the corresponding time, and subtracts it from the power generation forecast. Find a new surplus prediction pattern. Then, with respect to the storage battery remaining capacity at 6 o'clock of storage battery 103 determined in FIG. 8, the power amount of the unit time of the surplus prediction determined is sequentially integrated. In FIG. 8, 2 kw in each half hour from 5 am to 5:30 am, 5:30 am to 6 am, 6 am to 6:30 am, and 6:30 am to 7 am Change to a plan to discharge the In this example, 2 kw is continuously supplied for 2 hours, and 4 kwh is supplied from the storage battery 103 in response to the amount of demand electricity supplied.

  Then, the power management plan correction unit 235 determines whether or not the lowest value of the surplus integration prediction after 6 o'clock is negative, and if the surplus integration prediction is negative, the negative portion of the surplus prediction pattern (The amount of power every 30 minutes) is integrated (integrated) to obtain the amount of corrected power, and this amount of power is added to the initial value of the surplus integration prediction. The corrected power amount calculated here is the demand power demand power amount supplied to the other customer premises 10. In a time zone when solar cells 101 can not generate power, such as early morning when solar sunshine can not be obtained, the amount of power supplied to other customer facilities 10 is charged to storage battery 103 using nighttime power of the system power supply Generate a plan. The power management plan correction unit 235 may be configured to integrate the power amount for each unit time in the pattern of the supplied power demand power, and set the integration result as the corrected power amount.

  FIG. 9 is a diagram showing another example of the pattern diagram of the power management plan in which the power management plan correction unit 235 has performed the correction processing corresponding to the amount of power demand for supply to the customer facility. In FIG. 9, the first vertical axis (the vertical axis on the left side of the figure) shows the amount of power every 30 minutes, the second vertical axis (the vertical axis on the right side of the figure) shows the remaining battery capacity, and the horizontal axis It shows the time. In FIG. 9, a solid line indicates a pattern of surplus integrated prediction (predicted integrated surplus power), a dotted line indicates a pattern of power generation prediction (predicted power generation), and a dashed dotted line indicates a pattern of demand prediction (predicted demand power). The dotted line indicates the pattern of the surplus prediction (predicted surplus power). Each of the power generation forecast demand forecast and the surplus forecast corresponds to the first vertical axis, and the surplus integrated forecast corresponds to the second vertical axis.

In FIG. 9, when the supply demand power amount distributed from the demand demand power amount is included in the pattern of predicted demand power, the demand demand power amount is from 9:30 am to 11 am, so 11 am Instead, at 11:30 pm (23:30), it was detected as the lowest value of the power amount in the pattern of the predicted integrated surplus power.
Therefore, after the power management plan correction unit 235 makes correction based on the demand forecast of the customer facility shown in FIG. 6, the amount of power of the power to be provided to other customer facilities in the power management area 1 Correction corresponding to the demand-demand power amount.

  At this time, the power management plan correction unit 235 selects, from among the customer facilities 10 in the power management plan table of the storage unit 236, the customer facility 10 whose maximum value of the surplus integration prediction is less than the maximum storage capacity of the storage battery. The power supply demand electric energy in the power management area 1 is distributed to these. Here, the power management plan correction unit 235 adds the supplied power demand power amount to the demand forecast pattern of the customer facility 10 of the distribution destination for each unit time of the corresponding time, and subtracts it from the predicted power generation. New surplus prediction patterns. Then, with respect to the storage battery remaining capacity at 6 o'clock of storage battery 103 obtained in FIG. 6, the power amount of the unit time of the surplus prediction obtained is sequentially integrated.

  Then, the power management plan correction unit 235 determines whether or not the minimum value of the surplus integration prediction after 6 am is negative, and if the surplus integration prediction is negative, the pattern of the surplus prediction is negative. A part (electric energy for every 30 minutes) is integrated (integrated) to obtain a corrected electric energy, and this electric energy is added to the initial value of the surplus integration prediction. The corrected power amount calculated here is the demand power demand power amount supplied to the other customer premises 10. The amount of power supplied to other customer facilities 10 during the time zone when surplus power decreases due to the solar cell 101 being unable to generate power, such as early morning or nighttime when solar sunshine can not be obtained, A plan for charging the storage battery 103 is generated. The power management plan correction unit 235 may be configured to integrate the power amount for each unit time in the pattern of the supplied power demand power, and set the integration result as the corrected power amount.

The operation of the power management system of this embodiment will be described using FIGS. 5, 6, 7, 8 and 10. FIG. FIG. 10 is a flowchart showing an operation example of a process of generating a power management plan by the power management system of the present embodiment.
Step S1:
The generated power estimation unit 232 determines the pattern of predicted generated power of the target day based on the weather of the target day for which the power management plan is to be made, and the past generated power performance on each similar weather and temperature day of the customer facility 10 Generate Then, the generated power estimation unit 232 writes the pattern of the generated estimated generated power in a predetermined area of the storage unit 236 and stores the pattern, and the estimated generated power address, which is the address of the predetermined area, is stored in each customer facility 10. The power management plan table in the storage unit 236 is written and stored in association with the customer facility identification information. The estimation of power consumption in the power management plan may be performed based on the weather and temperature, or simply using the actual power consumption of the latest day (past day) and the actual past day of the same day of the week. it can. These power consumption estimations can be selected and used for each customer facility 10, respectively.

Step S2:
The power consumption estimation unit 231 uses the forecasted demand demand power of the target day based on the weather of the target day for which the power management plan is to be made and the past demand power performance on the day of each similar weather or temperature of the customer premises 10. Generate a pattern. Then, the power consumption estimation unit 231 writes the pattern of the generated predicted demand power in a predetermined area of the storage unit 236 and stores the pattern, and the predicted demand power address, which is the address of the predetermined area, is stored in each customer facility 10. The power management plan table in the storage unit 236 is written and stored in association with the customer facility identification information.

Step S3:
The power management plan creating unit 233 sequentially generates predicted power generation addresses corresponding to each customer facility identification information in order (for example, in the order described in the power management plan table) from the power management plan table in the storage unit 236. Read each of the predicted demand power addresses. Then, the power management plan creation unit 233 reads out from the storage unit 236 the pattern of predicted generated power corresponding to the predicted generated power address and the pattern of predicted demand power corresponding to the predicted demand power address.
The power management plan creation unit 233 subtracts the power amount of the pattern of predicted demand power from the power amount of the pattern of predicted power generation for each unit time to generate a pattern of predicted surplus power. The power management plan creation unit 233 generates a pattern of predicted surplus power of the customer facility 10 corresponding to all the customer facility identification information described in the power management plan table.

The power management plan creating unit 233 writes the pattern of the generated predicted surplus power in a predetermined area of the storage unit 236 and stores the pattern, and the predicted surplus power address, which is the address of the predetermined area, is used as the demand of each customer facility 10 The power management plan table in the storage unit 236 is written and stored in association with the home facility identification information.
Here, when the pattern of the surplus power is positive, the predicted generated power is larger than the predicted demand power. On the other hand, when the pattern of the surplus power is negative, the predicted generated power is smaller than the predicted demand power. Here, when the predicted surplus power is positive, the storage battery 103 is charged with this surplus power. When the predicted surplus power is negative, the storage battery 103 discharges the surplus power.

Step S4:
The power management plan creating unit 233 reads out the predicted surplus power address in order from the power management plan table in the storage unit 236 in correspondence with each customer facility identification information. Then, the power management plan creation unit 233 reads from the storage unit 236 a pattern of predicted surplus power corresponding to the predicted surplus power address.
The power management plan creation unit 233 integrates the amount of power for each unit time in the pattern of the read predicted surplus power, and generates a pattern of predicted integrated surplus power indicating the remaining power capacity of the storage battery 103 for each unit time.

Then, the power management plan creating unit 233 writes the pattern of the generated predicted integrated surplus power in a predetermined area of the storage unit 236 and stores the pattern, and the predicted integrated surplus power address which is the address of the predetermined area is The power management plan table in the storage unit 236 is written and stored in association with the customer facility identification information of the facility 10. Here, the power management plan creation unit 233 generates a pattern of predicted integrated surplus power of the customer facility 10 corresponding to all the customer facility identification information described in the power management plan table.
As shown in FIG. 5, patterns of power amount of each of predicted generated power, predicted demand power, predicted surplus power, and predicted integrated surplus power are generated.

Step S5:
The power management plan creating unit 233 sets the remaining power capacity from the previous day of the storage battery 103 at a time before 6 am, for example, the remaining power capacity 0 Wh as the target charging power, as shown in FIG.

Step S6:
The power management plan correction unit 235 corrects the power management plan created by the power management plan creation unit 233. Although the details will be described later, the lowest value of the predicted integrated surplus power is detected, and when the lowest value is negative, a positive power amount corresponding to the negative lowest value is set as a new target charging power. For example, in FIG. 5, the estimated integrated surplus power becomes the lowest value at 8:00 am, and the amount of power is −706 kWh. For this reason, as described later, assuming that 706 kWh is the target charging power, the estimated integrated surplus power at 8:00 am can be set to 0 by charging with night power.

  As shown in FIG. 6, the power management plan correction unit 235 generates a plan for selling power from the nighttime power of the system power supply and storing the power corresponding to the target charging power to the storage battery 103 before 6 am . As a result, the amount of negative power of the predicted surplus power in the customer facility 10 in the time zone where the generated power is not supplied from the solar cell 101 can be covered by the amount of power of the storage battery 103. As a result, it is not necessary to purchase an insufficient amount of power from the system power supply in a time zone where the generated power is not supplied from the solar cell 101. That is, since the storage battery residual capacity of storage battery 103 does not become negative (negative), it becomes possible to cover all of the amount of electric power for which the generated power is insufficient with respect to the consumed power from storage battery 103. There is no need to

Step S7:
The power management plan correction unit 235 determines, with respect to the demand input unit 234, whether or not there is a demand for demand-demand power from any of the customer facilities 10.
At this time, if any of the customer premises 10 is different from usual and needs extra power, the demand premises 10 inputs the required amount of power and the required time zone as a demand demand power pattern as a demand input Send to the unit 234.

Then, when the demand input unit 234 receives an inquiry for demand demand power from the power management plan correction unit 235, the demand input unit 234 responds to the power management plan correction unit 235 as to whether or not demand demand power is required.
Then, if the response from the demand input unit 234 indicates that there is a demand for demand power, the power management plan correction unit 235 determines that there is a demand for demand power, and advances the process to step S8. On the other hand, if the response from the demand input unit 234 indicates that there is no demand for demand power, the power management plan correction unit 235 determines that there is no demand for demand power, and advances the process to step S12.

Step S8:
The power management plan correction unit 235 requests the demand input unit 234 for the pattern of the demand-demand power amount. Then, the demand input unit 234 outputs the pattern of the demand-demand power amount to the power management plan correction unit 235 in response to the request.
Next, the power management plan correction unit 235 performs processing of distributing the input demand demand power amount to each customer facility 10. The distribution method corresponds to the ratio of the power capacity by the storage battery table of each customer facility 10 and the power capacity of the storage battery 103 of the customer facility 10, which is stored in advance and stored in the storage unit 236. The power amount of the pattern is adjusted, and the adjustment result is distributed to the customer facilities 10 excluding the customer facility 10 which has made the demand demand as the supply demand energy.

  For example, in the case where the storage capacity of the storage battery 103 can be allocated to three customer facilities 10 of 20 kWh, 30 kWh, and 50 kWh, the following occurs. Supply demand power adjusted so that 20 kWh / 100 kWh, that is, the power amount per unit time of the demand-demand power amount pattern becomes 20%, is distributed to the customer facility 10 of 20 kWh. Supply demand power adjusted so that 30 kWh / 100 kWh, that is, the amount of power per unit time of the demand-demand power amount pattern becomes 30%, is distributed to the customer facility 10 of 30 kWh. For the 50 kWh customer facility 10, 50 kWh / 100 kWh, that is, the supply demand energy adjusted so that the power per unit time of the demand-demand energy pattern is 50% is distributed.

Step S9:
The power management plan correction unit 235 reads the predicted demand power address of the customer facility 10 to which the supply demand power amount is distributed, from the power management plan table of the storage unit 236 by the customer facility identification information of the customer facility 10. . Then, the power management plan correction unit 235 reads a pattern of predicted demand power from the storage unit 236 based on the read predicted demand power address.
Next, the power management plan correction unit 235 adds the power amount of the unit time of the time corresponding to the pattern of the supplied demand power amount to the power amount of the unit time of each time of the read predicted power demand pattern, Create a new forecasted demand power pattern that includes the supplied demand power.

The power management plan correction unit 235 reads out the predicted generated power address of the customer facility 10 to which the supply demand power amount is distributed, from the power management plan table of the storage unit 236 using the customer facility identification information of the customer facility 10. . Then, the power management plan correction unit 235 reads a pattern of predicted generated power from the storage unit 236 based on the read predicted generated power address.
Then, the power management plan correction unit 235 subtracts the power amount of the unit time of the time corresponding to the pattern of the predicted demand power newly created from the power amount of the unit time of each time of the pattern of the predicted power generation read out. Create a new forecast surplus power pattern.
Next, the power management plan correction unit 235 calculates a new predicted integrated surplus power by adding the power value of the predicted surplus power of the time unit of each time to the time series in the newly created predicted demand power pattern. .

Step S10:
The power management plan correction unit 235 corrects the power management plan created by correcting itself corresponding to the predicted surplus power in each customer facility 10. Although the details will be described later, the lowest value of the predicted integrated surplus power is detected, and when the lowest value is negative, a positive power amount corresponding to the negative lowest value is set as a new target charging power. For example, in FIG. 8, the one in which the lowest value of the predicted integration surplus power is −4906 Wh) at 8:30 am in FIG. 7 is corrected to 0. For this reason, the predicted integration surplus power at 8:30 am can be set to 0 by charging with nighttime power, as will be described later, with 5 kWh as the target charging power.

  The power management plan correction unit 235 generates a plan for selling power from the nighttime power of the system power supply and storing the power corresponding to the target charging power to the storage battery 103 before 6 am as shown in FIG. . As a result, the negative amount of predicted surplus power in the customer's facility 10 in the time zone where the generated power is not supplied from the solar cell 101, and the amount of demand power supplied in other customer's facilities 10 in the power management area 1 It can be covered by the amount of power of 103. As a result, it is not necessary for each of the customer facilities 10 in the power management area 1 to purchase an insufficient amount of power from the system power supply in a time zone in which the generated power is not supplied from the solar cell 101.

The power management plan correction unit 235 writes and stores each pattern of the corrected predicted demand power, the predicted surplus power, and the predicted integrated surplus power in the storage unit 236 as a new power management plan.
Then, the power management plan correction unit 235 sets, as a surplus demand power address, a forecast surplus power address, and a forecast integration surplus power address, an address where each pattern of surplus demand power, forecast surplus power and forecast integrated surplus power is written. The power management plan table of the storage unit 236 is written and stored in association with the customer facility identification information of the customer facility 10.

Step S11:
The power management plan correction unit 235 sequentially generates predicted power generation address, surplus demand power address, predicted surplus power address, and predicted integration surplus from the power management plan table of the storage unit 236 corresponding to the customer identification information of the customer facility 10 Read power address.
The power management plan correction unit 235 uses the read predicted generated power address, the surplus demand power address, the predicted surplus power address, and the predicted integrated surplus power address to generate predicted generated power, surplus demand power, predicted surplus power, and predicted integrated surplus power, respectively. Are read from the storage unit 236.
Then, each time the power management plan correction unit 235 reads out the power management plan corresponding to the customer facility 10, each pattern of the predicted generated power, the surplus demand power, the predicted surplus power, and the predicted integration surplus power is It outputs to each of the customer premises 10 in the management area 1.

Next, the process of correcting the power management plan by the power management plan correction unit 235 in step S6 will be described in detail with reference to FIG. FIG. 11 is a flowchart showing an operation example of a process of correcting a power management plan by the power management system of the present embodiment.
Step S21:
The power management plan correction unit 235 sequentially reads out the predicted integration surplus power address from the power management plan table of the storage unit 236 in accordance with the customer facility identification information of the customer facility 10.
Then, the power management plan correction unit 235 reads the pattern of the predicted integration surplus power of the corresponding customer facility 10 from the storage unit 236 based on the read out predicted integration surplus power address.
The power management plan correction unit 235 detects the lowest value of the power amount in the pattern of the read predicted integration surplus power.

Step S22:
Next, the power management plan correction unit 235 determines whether the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is less than zero.
At this time, if the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is less than 0, the power management plan correction unit 235 advances the process to step S23. On the other hand, if the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is not less than 0, the power management plan correction unit 235 advances the process to step S7 (FIG. 10). For example, since -706 Wh at 8 am in FIG. 6 is the lowest value, and the lowest value is less than 0, the power management plan correction unit 235 advances the process to step S23.

Step S23:
The power management plan correction unit 235 adds the absolute value of the lowest amount of power to the target charging power of the predicted integrated surplus power, and corrects the pattern of the predicted integrated surplus power. As a result, the lowest amount of power can be set to 0, and it is not necessary to purchase negative power in the estimated integrated surplus power from the system power supply. For example, in FIG. 6, by adding 706 Wh which is an absolute value of -706 Wh to the charging target power, it is possible to make the power amount of the predicted integrated surplus power at 8 am 0.

Step S24:
The power management plan correction unit 235 detects the maximum value of the power amount in the pattern of the predicted integrated surplus power after 6 am.

Step S25:
The power management plan correction unit 235 determines whether the maximum value of the detected power amount is equal to or less than the maximum maximum storage capacity (for example, SOC 80%) of the storage battery 103.
At this time, if the maximum value of the amount of power detected in the pattern of predicted integrated surplus power is equal to or less than the maximum storage capacity of storage battery 103, power management plan correction unit 235 advances the process to step S7 (FIG. 10). On the other hand, if the maximum value of the detected power amount exceeds the maximum storage capacity of storage battery 103, power management plan correction unit 235 advances the process to step S26.

Step S26:
When the maximum value of the detected power amount exceeds the maximum storage capacity of the storage battery 103, the power management plan correction unit 235 can not store power exceeding the maximum storage capacity. Re-set the maximum storage capacity and create a new pattern of estimated integrated surplus power.
Then, the power management plan correction unit 235 corrects the pattern of predicted surplus power so as to be a pattern of new predicted integrated surplus power.
The power management plan correction unit 235 subtracts the power amount of the unit time of the corresponding time of the pattern in the predicted surplus power after the correction from the power of the unit time of each time of the pattern in the predicted surplus power before the correction. Create a demand-demand power pattern.

In the pattern of individual demand-demand power amount of customer facility 10, power management plan correction unit 235 resets the maximum storage capacity to the target charging power after the correction process for all customer facilities 10 is completed. The electric energy is integrated for each unit time of each time to generate a demand-demand electric energy. For example, the power management plan correction unit 235 adds it to the demand-demand power amount from each customer facility 10 already described and uses it as the demand-demand power amount used in the process of step S10 described later.
Then, the power management plan correction unit 235 advances the process to step S7 (FIG. 10).

Next, the process of correcting the power management plan by the power management plan correction unit 235 in step S10 will be described in detail with reference to FIG. FIG. 12 is a flowchart showing an operation example of a process of correcting a power management plan by the power management system of the present embodiment.
Step S31:
The power management plan correction unit 235 sequentially reads out the predicted integration surplus power address from the power management plan table of the storage unit 236 in accordance with the customer facility identification information of the customer facility 10.
Then, the power management plan correction unit 235 reads the pattern of the predicted integration surplus power of the corresponding customer facility 10 from the storage unit 236 based on the read out predicted integration surplus power address.
The power management plan correction unit 235 detects the lowest value of the power amount in the pattern of the read predicted integration surplus power.

Step S32:
The power management plan correction unit 235 determines whether the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is less than zero.
At this time, if the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is less than 0, the power management plan correction unit 235 advances the process to step S33. On the other hand, if the power amount of the lowest value in the pattern of the detected estimated integrated surplus power is not less than 0, the power management plan correction unit 235 advances the process to step S7 (FIG. 10). For example, in FIG. 8, the lowest value of the power amount in the pattern of the predicted integrated surplus power before changing the target charging power is 8:30 am, and the lowest value is −5300 Wh (−5.3 kWh). In this case, since the minimum value is less than 0, the power management plan correction unit 235 proceeds with the process to step S33.

Step S33:
The power management plan correction unit 235 adds the absolute value of the lowest amount of power to the target charging power of the predicted integrated surplus power, and corrects the pattern of the predicted integrated surplus power. As a result, the lowest amount of power can be set to 0, and it is not necessary to purchase negative power in the estimated integrated surplus power from the system power supply. For example, by adding 5300 Wh (5.3 kWh), which is an absolute value of -5300 Wh, to the charging target power in FIG. 8, it is possible to make the power amount of the predicted integrated surplus power at 8:00 am 0.

Step S34:
The power management plan correction unit 235 detects the maximum value of the power amount in the pattern of the predicted integrated surplus power after 6 am.

Step S35:
The power management plan correction unit 235 determines whether the maximum value of the detected electric energy is equal to or less than the maximum maximum storage capacity of the storage battery 103.
At this time, if the maximum value of the amount of power detected in the pattern of predicted integrated surplus power is equal to or less than the maximum storage capacity of storage battery 103, power management plan correction unit 235 advances the process to step S7 (FIG. 10). On the other hand, if the maximum value of the detected power amount exceeds the maximum storage capacity of storage battery 103, power management plan correction unit 235 advances the process to step S36.

Step S36:
When the maximum value of the detected power amount exceeds the maximum storage capacity of the storage battery 103, the power management plan correction unit 235 can not store power exceeding the maximum storage capacity. Re-set the maximum storage capacity and create a new pattern of estimated integrated surplus power.
The power management plan correction unit 235 corrects the pattern of the predicted surplus power with the target charge power as the maximum storage capacity so as to be the pattern of the new predicted integrated surplus power.
The power management plan correction unit 235 subtracts the power amount of the unit time of the corresponding time of the pattern in the predicted surplus power after the correction from the power of the unit time of each time of the pattern in the predicted surplus power before the correction, The non-supply power capacity is newly set as the pattern of the individual demand-demand power amount.

  After the power management plan correction unit 235 completes correction processing for all the customer facilities 10 in the power management area 1, the individual demand of the customer facility 10 that has reset the maximum storage capacity to the target charged power In the demand power amount pattern, the power amount is integrated for each unit time of each time to generate a demand-demand power amount. Then, the power management plan correction unit 235 searches for the customer facility 10 in which the maximum value of the power amount of the pattern of the predicted integration surplus power of the customer facility 10 in the power management area 1 is less than the maximum storage capacity of the storage battery 103 Do.

  Next, the power management plan correction unit 235 advances the process to step S8, and distributes the calculated demand-demand electric energy to the searched customer facility 10. In this case, the power management plan correction unit 235 distributes the supply demand power not by the maximum storage capacity of the storage battery 103 already described but by the ratio of the maximum storage capacity from the maximum storage capacity to the maximum power amount in the pattern of current estimated integrated surplus power. I do.

In the present embodiment, the power management apparatus 200 may be configured to be able to respond to a demand-demand power request from the outside of the power management area 1 through a network such as the Internet as follows.
If the demand-demand power amount is input from an external customer facility other than the demand-making facility 10 in the power management area 1, that is, an external customer facility not under the power management of the power management apparatus 200, the day before the power management plan is executed. The following processing is performed in the power management apparatus 200 of the embodiment.

In the power management apparatus 200, for example, after the power demand in the customer facility 10 in the power management area 1 managed by the power management plan correction unit 235 is satisfied, another demand outside the power management area 1 is satisfied. Respond to demand-demand power from home facilities.
The power management plan correction unit 235 sequentially reads out the predicted integration surplus power address from the power management table in the storage unit 236. Then, the power management plan correction unit 235 sequentially reads out from the storage unit 236 based on the predicted and accumulated surplus power address, and extracts the customer facility 10 whose target charging power is less than the maximum storage capacity.

  The power management plan correction unit 235 performs the processing from step S8 to step S11 in FIG. 10, and the demand-demand power amount from the outside of the power management area 1 is supplied to the extracted customer facility 10. Assign as. At this time, the power management plan correction unit 235 distributes the demand-demand power amount based on the ratio of the difference power amount obtained by dividing the target charging power from the maximum storage capacity.

  Then, the power management plan correction unit 235, as a result of the processing from step S8 to step S11 in FIG. 10, determines the price per unit power and the demand demand power for the external customer facility that has requested the demand on demand power amount. Notify if all quantities can be supplied. At this time, the power management plan correction unit 235 adds information on how much power can be provided, when it is not possible to supply all of the demand-demand power.

  The power management plan correction unit 235 determines the time for charging the supplied demand power amount supplied to the storage battery 103 in each customer facility 10, and charges the notification to the customer facility outside the power management area 1 Add a deadline for the response of the request decision considering the Here, at the time when charging of the storage battery 103 in each customer facility 10 is in time, it is necessary to supply the power management apparatus 200 with a demand for demand-demand power. In storage battery 103, the maximum charge amount per unit time is determined, and charging may not be possible in a short time.

  As a result, the customer facility outside the power management area 1 requests the power management apparatus 200 of the power management area 1 to supply based on the price per unit time and the power amount notified that the power can be supplied. Determine whether to do it. Then, the customer facility outside the power management area 1 responds to the power management apparatus 200 of the power management area 1 about the request for supply by the deadline of the answer. The power management plan correction unit 235 calculates the storage time required to charge the storage battery 103 from the system power supply to the storage power amount corresponding to the demand-demand power amount, and the storage time is calculated relative to the time to start charging. The charge completion time is calculated as the time limit of the answer.

  Here, the price of unit power of demand demand power to be supplied is determined each time according to the amount of power supplied, even if the power management area and the customer facilities outside power management area 1 are decided in advance. You may do so. If the customer facility outside the power management area 1 is a business office, if the contract for the amount of power with the power company of the system power supply is exceeded, a penalty occurs that the price of the unit power rises, and purchasing power for the next year Contract fees may be higher. For this reason, a business establishment may be profitable even if it buys expensive power only in a short time. Therefore, the price of unit power may be set several times to several tens of times the price of purchase from the grid power supply.

According to the present embodiment, in the power management area 1, since the demand-demand electric energy supplied to the other customer facilities 10 is charged to the storage battery 103 before the demand is started, the solar battery It is possible to supply surplus power to other customer facilities 10 even in a time zone in which the power generation unit 101 can not generate power.
According to the present embodiment, the demand demand power amount to be supplied to the other customer facilities outside the power management area 1 similarly to the demand facility 10 in the power management area 1 is started before the demand starts In addition, since the storage battery 103 is charged, surplus power can be supplied to other customer facilities 10 even in a time zone in which the solar cell 101 can not generate power.
According to the present embodiment, surplus power (supply demand power amount) supplied to another customer facility 10 is combined with its own predicted demand power (supply demand in unit time at each time in the pattern of predicted demand power) Since the power to be charged to the storage battery 103 is obtained by adding the amount of power, it is possible to charge the storage battery 103 with an appropriate amount of power without wasting power purchase from the system power supply.

  Programs for realizing the functions of the power management apparatus 200 in FIG. 3 and the management function of the storage battery 103 in the customer facility 10 shown in FIG. 2 are recorded in a computer readable recording medium, and this recording is performed. The charge and discharge of the storage battery may be managed by causing a computer system to read and execute a program recorded on a medium. Here, the “computer system” includes an OS and hardware such as peripheral devices.

The "computer system" also includes a homepage providing environment (or display environment) if the WWW system is used.
The "computer-readable recording medium" refers to a storage medium such as a flexible disk, a magneto-optical disk, a ROM, a portable medium such as a CD-ROM, or a hard disk built in a computer system. Furthermore, “computer-readable recording medium” dynamically holds a program for a short time, like a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, the volatile memory in the computer system which is the server or the client in that case, and the one that holds the program for a certain period of time is also included. The program may be for realizing a part of the functions described above, or may be realized in combination with the program already recorded in the computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and includes design and the like within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Power management area 2 ... Commercial power supply 3 ... Distribution line network 10 ... Demand household facility 20 ... Common storage device 101 ... Solar battery 102 ... Power conditioner 103 ... Storage battery 104 ... Inverter 105 ... Power path switching part 106 ... Load 107 ... Control unit according to facility 108 Power amount estimation unit 200 Power management device 201 Network I / F unit 202 Power management unit 203 Power management plan preparation unit 221 Total power calculation unit 222 Distribution power determination unit 223 Distribution control Unit 224 ... inverter efficiency characteristic storage unit 231 ... power consumption estimation unit 232 ... generated power estimation unit 233 ... power management plan creation unit 234 ... demand input unit 235 ... power management plan correction unit 236 ... storage unit

Claims (8)

In a power management area, a plurality of customer facilities including a first customer facility equipped with a storage battery and a power generator as one of the electric facilities are connected to a common power supply, and surplus power is shared among the customer facilities. Management system,
The demand power for each unit time on the target processing day in the first customer facility is predicted, and the supply demand power which is the power to be supplied per unit time on the target processing day to the other customer facility is added and forecasted A power consumption estimation unit that outputs power as demand power;
And generated power estimation unit for outputting a calling DENDEN force per unit time in the target processing date in the first customer facility as the predicted power generation by predicting,
The difference between the predicted generated power and the predicted demand power for each unit time is determined, and this difference is used as the predicted surplus power, and the predicted integrated surplus power obtained by integrating the predicted surplus power is calculated to generate a power management plan Management plan making department,
The power management plan for obtaining the unit time in which the estimated integrated surplus power shows the lowest value, finding the stored power amount for the storage battery from the system power supply so that the lowest value becomes the discharge termination storage battery capacity, and changing the predicted surplus power A correction unit,
A power management system comprising: The power management plan correction unit
Calculated demand demand power amount to charge the stored power amount for each unit time within a predetermined time, the power management according to claim 1, characterized in that to correct the predicted accumulation surplus electricity by the demand-demand power amount system. The power management plan correction unit
A storage time required to charge the storage battery from the system power supply is calculated, and the storage time is added to the charging start time to calculate a charging completion time. The power management system according to claim 1 or claim 2. The power management plan correction unit
By the time of performing the demand supplied to the other customer facility, and calculates the power storage amount of power charged in the storage battery, or yea Kano determining the stored power amount satisfies the supply Deman de power The power management system according to claim 1 or 2, wherein The said other consumer facility contains the consumer facility in the said electric power management area, and the consumer facility other than the said electric power management area, The characteristic as described in any one of the Claims 1-4 characterized by the above-mentioned. Power management system. The power management plan correction unit
In response to the supply request of the supply demand power from the customer facility outside the power management area, the supply amount of electric power that can be supplied is obtained and output. Power management system as described. In a power management area, a plurality of customer facilities including a first customer facility including a storage battery and a power generator as one of the electrical facilities are connected to a common power supply, and surplus power is supplied to the customer facility. Power management methods that are compatible with each other,
The power consumption estimation unit predicts the demand power per unit time in the target processing date in the first customer facility, a power supply for each unit time in a subject processing date to other customers facilities supply and demand power estimation process is output as the prediction power demand by adding demand power, generated power estimation unit, predictive power to predict the calling DENDEN force per unit time in the target processing date in the first customer facility Generation power estimation process which is output as electric power,
The power management plan creation unit obtains a difference for each unit time of each of the predicted generated power and the predicted demand power, sets the difference as predicted surplus power, and calculates predicted integrated surplus power obtained by integrating the predicted surplus power, Power management plan generation process for generating a power management plan;
The power management plan correction unit obtains the unit time in which the predicted integrated surplus power indicates the lowest value, and obtains the storage power amount for the storage battery from the system power supply so that the lowest value becomes the discharge termination storage battery capacity Power management plan correction process to change power,
A power management method comprising: In a power management area, a plurality of customer facilities including a first customer facility including a storage battery and a power generator as one of the electrical facilities are connected to a common power supply, and surplus power is supplied to the customer facility. A program that causes a computer to execute the operation of a power management system that is compatible with each other,
Computer,
It predicts the demand power per unit time in the target processing date in the first customer facility, by adding the supply-demand power is the power supply for each unit time in a subject processing date for other customer facility Demand power estimation means to output as forecast demand power,
Generated power estimation means for outputting an outgoing DENDEN force per unit time in the target processing date in the first customer facility as the predicted power generation by predicting,
The difference between the predicted generated power and the predicted demand power for each unit time is determined, and this difference is used as the predicted surplus power, and the predicted integrated surplus power obtained by integrating the predicted surplus power is calculated to generate a power management plan Management plan generation means,
The power management plan for obtaining the unit time in which the estimated integrated surplus power shows the lowest value, finding the stored power amount for the storage battery from the system power supply so that the lowest value becomes the discharge termination storage battery capacity, and changing the predicted surplus power Correction means,
Program to function as.

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