JP2020022339A - Power management system, power management device and program - Google Patents

Abstract

To reduce demand power appropriately, regardless of power variation due to a power generator in a user facility, under demand response for reducing the demand power with reference to a base line.SOLUTION: A power management system includes a prediction demand power calculation part for calculating a control responding reference demand power, used as a reference of net system energy demand calculation reduced by demand response control, on the basis of achievement of demand power measured for each of multiple user facilities included in a power management area.SELECTED DRAWING: Figure 5

Description

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

  It is known that power control is performed so that the amount of required power in a customer facility is reduced in accordance with the requested reduction in required power. In this case, the reduced power demand is determined based on a predetermined baseline. In order to suppress the error of the baseline due to the loss of the power data used for the calculation of the baseline, a technique of compensating for the lost power and calculating the baseline is known (for example, see Patent Document 1). ).

JP, 2018-61314, A

  When a customer facility includes a power generation device that supports renewable energy such as a solar cell, the amount of power generated at the customer facility varies according to weather or the like. In this case, for example, the power of the customer measured at the power receiving point of the customer facility is a combination of the demand power at the customer facility and the power generated by the power generation device, and thus greatly fluctuates with the generated power. As described above, with the baseline calculated based on the power of the consumer affected by the generated power, there is a possibility that an appropriate result of the reduction in the required power cannot be obtained.

  The present invention has been made in view of such circumstances, and under a demand response adapted to reduce power demand based on a baseline, regardless of power fluctuations caused by a power generator provided in a customer facility. It is an object of the present invention to appropriately reduce power demand.

  One embodiment of the present invention for solving the above-described problem is to provide a control-compliant reference demand power used as a reference for calculating a demand power amount reduced by demand response control for each of a plurality of customer facilities included in a power management area. It is a power management system including a predicted demand power calculation unit that calculates based on a total of measured demand power results.

  One embodiment of the present invention relates to a control-compliant reference demand power used as a reference for calculating a demand power amount reduced by demand response control, and a total of demand power results measured for a plurality of customer facilities included in a power management area. It is a power management device including a predicted demand power calculation unit that calculates based on the power demand.

  One embodiment of the present invention provides a control-dependent reference demand power using a computer as a reference for calculating a demand power amount reduced by demand response control, the demand power measured for each of a plurality of customer facilities included in a power management area. This is a program for functioning as a predicted demand power calculation unit that calculates based on the total of actual results.

  ADVANTAGE OF THE INVENTION According to this invention, under the demand response made to reduce demand electric power based on a baseline, reduction of demand electric power is aimed at appropriately irrespective of the electric power fluctuation by the power generation device with which a customer facility is equipped. The effect is obtained.

FIG. 1 is a diagram illustrating an example of an overall configuration of a power management system according to an embodiment. It is a figure showing an example of the electric equipment with which customer facilities in this embodiment are provided. It is a figure showing the example of composition of the power management device in this embodiment. FIG. 3 is a diagram illustrating a relationship among a receiving point power, an actual demand power, and a generated power. It is a figure showing the example of composition of the power management device of this embodiment. FIG. 4 is a diagram illustrating an example of demand response control in consideration of charging of a storage battery in the present embodiment. FIG. 4 is a diagram illustrating an example of demand response control in consideration of charging of a storage battery in the present embodiment. In this embodiment, it is a figure showing an example of electric equipment with which a customer facility is provided.

<Embodiment>
[Configuration example of power management system]
FIG. 1 shows an example of the overall configuration of a power management system according to an embodiment of the present invention. The power management system according to the present embodiment collectively manages power in customer facilities such as houses, commercial facilities, and industrial facilities corresponding to a plurality of customers in a predetermined area range. Such a power management system is referred to as, for example, a HEMS (Home Energy Management System) that manages each customer facility, a TEMS (Town Energy Management System) that integrates and manages the HEMS, and a CEMS (Community Energy Management System). Corresponding to things.

The power management system according to the present embodiment performs power management on electrical equipment provided for each of a plurality of customer facilities 10 in a certain range of a region shown as a power management region 1 in FIG.
The customer facility 10 corresponds to, for example, a house, a commercial facility, or an industrial facility. Further, the power management area 1 may correspond to, for example, one or a plurality of apartment houses, and each of the customer facilities 10 may be each house in the apartment house.

The plurality of customer facilities 10 in the power management area 1 illustrated in FIG. 1 include a customer facility 10 including a solar cell that is a power generation device corresponding to renewable energy. Further, the plurality of customer facilities 10 in the power management area 1 include the customer facility 10 having a storage battery as one of the electric facilities.
Among such customer facilities 10, there may be a customer facility 10 having both a solar cell and a storage battery, or a customer facility 10 having one of a solar cell and a storage battery. Is also good.
In addition, in the customer facility 10, in addition to the solar cell or instead of the solar cell, for example, a power generation device that generates power in response to another renewable energy such as wind power or geothermal power may be provided. Further, in the customer facility 10, in addition to a power generation device that generates power in response to renewable energy, another power generation device such as a fuel cell that generates power using gas or the like is provided. May be.
However, hereinafter, for the sake of convenience of description, a case where the power generation device provided in the customer facility 10 is a solar cell will be described as an example.

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 distribution line 3. Each customer facility 10 can supply power supplied from the distribution line 3 to a load. Thereby, various electric facilities (equipment) as loads are operated.
Further, the customer facility 10 including the solar cells can output the generated power of the solar cells to the distribution line 3 (reverse power flow).
Further, in the customer facility 10 having a storage battery, the storage battery can be stored (charged) by receiving power supply from the distribution line 3. Further, in the customer facility 10 including the storage battery and the solar battery, the storage battery can be charged with the power generated by the solar battery.

  Further, the position of the customer facility may not be limited to the same area as another customer facility that is similarly managed, as long as the configuration is managed by the power management system. For example, the customer facilities may be discrete as long as they are in the same power pipe. In addition, the power management system is registered as a customer facility under its own management, and if information managed by using the network 300 can be transmitted and received, a different region (for example, Hokkaido, Honshu, Kyushu, Shikoku, etc.) An aggregate of a plurality of customer facilities registered in each area) may be used. In this case, the common distribution line 3 is an aggregate of power supply lines in an area connected to each of the customer facilities 10.

In the power management system according to the present embodiment, a power management device 200 is provided.
The power management apparatus 200 performs power control on electric facilities in each customer facility 10 belonging to the power management area 1. For this purpose, the power management apparatus 200 in the figure is connected to each of the customer facilities 10 via the network 300 so as to be able to communicate with each other. Thereby, the power management apparatus 200 can control the electric equipment in each customer facility 10.

  Also, in the figure, a power receiving point PT in the power management area 1 is shown. From the power receiving point PT in the power management area 1, the distribution line 3 branches to each customer facility 10.

[Example of electrical facilities in customer facilities]
Next, with reference to FIG. 2, an example of electrical equipment provided in one customer facility 10 will be described.
The customer facility 10 shown in FIG. 1 includes, as electrical equipment, a solar cell 101, a power conditioner 102, a storage battery 103, an inverter 104, a distribution board 105, a load 106, a facility-specific control unit 107, and a smart meter 108. I have.

The solar cell 101 is one of power generation devices using renewable energy, and converts light energy into electric power by a photovoltaic effect. The solar battery 101 converts sunlight into electric power by being installed in a place where sunlight can be efficiently received, such as the roof of the customer facility 10, for example.
The power conditioner 102 (an example of a power control device) controls and outputs power generated by the solar cell 101. At this time, the power conditioner 102 converts DC power output from the solar cell 101 into AC.

  The storage battery 103 accumulates power input for charging, and discharges and outputs the stored power. As the storage battery 103, for example, a lithium ion battery or the like can be employed.

The inverter 104 is provided for each storage battery 103 and performs AC / DC conversion of power for charging the storage battery 103 or DC / AC conversion of power output by discharging from the storage battery 103. That is, the inverter 104 performs bidirectional conversion of the power input and output by the storage battery 103.
Specifically, when charging the storage battery 103, AC power for charging is supplied from the commercial power supply 2 or the power conditioner 102 to the inverter 104 via the distribution board 105. The inverter 104 converts the AC power supplied as described above into DC and supplies the DC power to the storage battery 103.
When the storage battery 103 is discharged, DC power is output from the storage battery 103. The inverter 104 converts the DC power output from the storage battery 103 into AC and supplies the AC to the distribution board 105.
Further, the distribution board 105 can form a power path so as to supply the commercial power supply 2 to the load 106 in the same customer facility 10.
In addition, the distribution board 105 can form a power path so that the power generated by the solar cell 101 (generated power) is supplied from the power conditioner 102 to the load 106 in the same customer facility 10.
In addition, the distribution board 105 may form a power path in the same customer facility 10 so as to charge the storage battery 103 via the inverter 104 with power supplied from one or both of the commercial power supply 2 and the solar cell 101. it can.
In addition, the distribution board 105 can form a power path to supply the electric power output by discharging from the storage battery 103 to the load 106 via the inverter 104 in the same customer facility 10.
Further, the distribution board 105 can form a power path so that the power generated by the solar cell 101 is supplied to a storage battery in another customer facility 10 via, for example, the distribution line 3.
In addition, the distribution board 105 can form a power path to supply the power output by discharging the storage battery 103 to the load 106 in another customer facility 10.
FIG. 1 shows an example in which a power conditioner 102 corresponding to the solar cell 101 and an inverter 104 corresponding to the storage battery 103 are provided. However, for example, the customer facility 10 may have a configuration in which the functions of the power conditioner 102 and the inverter 104 are integrated.

  The load 106 collectively indicates devices, facilities, and the like that consume power in order to operate in the customer facility 10.

  The facility-specific control unit 107 controls the electric power in the electric facilities (all or a part of the solar battery 101, the power conditioner 102, the storage battery 103, the inverter 104, the distribution board 105, the load 106, and the smart meter 108) in the customer facility 10. Get the input / output amount (exchange amount) of. Further, the facility-specific control unit 107 controls at least a part of the operation of the electric facilities in the customer facility 10.

  The smart meter 108 is a power measuring device having a communication function. In the present embodiment, an example in which the power measurement point of the smart meter 108 is the power receiving point of the corresponding demand facility 10 will be described. That is, the smart meter 108 can measure the power at the receiving point in the customer facility 10. In the figure, since the smart meter 108 is communicably connected to the facility-specific control unit 107, it can output information related to power measurement and the like to the facility-specific control unit 107. The facility-specific control unit 107 can transmit the information received from the smart meter 108 to the power management apparatus 200 (FIG. 1) via, for example, the network 300.

  The power management apparatus 200 previously illustrated in FIG. 1 performs power control 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 via the network 300 so as to be able to communicate with each other. Thereby, the facility-specific control unit 107 can control the electric equipment under its own control according to the control of the power management apparatus 200.

  Note that, for example, the facility-specific control unit 107 may be omitted, and the power management apparatus 200 may directly control electric facilities such as the storage battery 103 in each customer facility 10. However, by adopting a configuration including the power management apparatus 200 and the facility-specific control unit 107 as in the present embodiment, the control is hierarchized in the entire power management area 1 and the customer facility 10, so that the power Complicated control of the management device 200 can be avoided.

  In addition, as described above, in a part of the customer facilities 10 in the power management area 1, for example, a solar power generation system (the solar battery 101 and the power conditioner 102) and a storage battery system (the storage battery 103 and the inverter 104). May not be provided.

In the power management area 1 of the present embodiment, a control (demand response control) corresponding to a reduction in demand power (demand response) is performed under a negawatt transaction. That is, in the power management area 1, the power management apparatus 200 suppresses the demand power in the power management area 1 in response to a demand response request from a power company (retail power company, power transmission and distribution company) via an aggregator, for example. Execute the control to be performed. Here, the demand power corresponds to the purchased power (forward power flow) in the power management area 1 as a whole.
By reducing the required power amount by the demand response control in the power management region 1, for example, the power company can procure the power amount corresponding to the reduced required power amount as the power that can be supplied to other than the power management region 1. It will be. In the negawatt transaction, a price is paid to the customer in the power management area 1 as a price for the procured power. Under the negawatt transaction of the present embodiment, a case where a set of customer facilities 10 included in the power management area 1 is treated as one customer will be described as an example.

In the negawatt transaction, a price is determined based on the amount of demand power reduced according to the demand response (demand power reduction). In the negawatt transaction, a baseline is set in advance, and the required power reduction amount is calculated based on the set baseline.
The baseline is the power demand assumed (predicted) when the power demand is not reduced by the demand response control. As an example, the baseline can be calculated based on the average value of the required power amount on the fourth day, where the required power amount is high in the last five days.

FIG. 3 schematically shows the relationship between the baseline BL and the demand power Pdm. The power demand here corresponds to the power purchased by the customer, and corresponds to, for example, forward flow power measured at the power receiving point of the customer. When the customer facility 10 included in the power management area 1 is viewed as one customer as in the present embodiment, the demand power is forward flow power measured at the power receiving point PT in FIG. The power at the power receiving point PT can be obtained by integrating the power measured at the power receiving points in each of the customer facilities 10 included in the power management area 1.
In the figure, times t1 to t2 are shown as a time zone in which a demand response is requested (request time zone). Note that, in the figure, for simplicity of description, it is assumed that there is no error between the calculated (predicted) baseline BL and the demand power Pdm of the day.
In the same figure, it is shown that the actual power demand corresponding to the area AR indicated by hatching has been reduced by the reduction of the actual power demand by the demand response control in the request time zone from time t1 to time t2. Have been. As can be understood from the drawing, the reduction amount of the actual demand power corresponding to the area AR is calculated based on the difference between the baseline BL and the actual demand power at each time. As described above, the baseline is used as a reference power demand in calculating the power demand reduction.

Hereinafter, the calculation of the baseline in the present embodiment will be described.
FIG. 4 shows the receiving point power Ppt (Ppt-1, Ppt-2), the actual demand power Prl, and the generated power Ppv (Ppv-1, Ppv-2) in the power management area 1.
Power receiving point power Ppt is power obtained at power receiving point PT in power management area 1. The receiving point power Ppt can be obtained by integrating the power measured by the smart meter 108 at the receiving point of each customer facility 10 in the power management area 1.
The actual demand power Prl is the actual demand power of the entire power management area 1. The actual demand power here corresponds not to the power obtained at the power receiving point, but to the power consumed by the customer's electrical equipment. Therefore, the actual demand power Prl is obtained by integrating the actual demand power of each customer facility 10 in the power management area 1.
The generated power Ppv is a sum of the amounts of power generated by the power generation of the solar cells 101 provided in the power management area 1.

  In the figure, the vertical axis indicates power, and the horizontal axis indicates time. When the power on the vertical axis is “0”, the power observed at the power receiving point PT is “0”, and neither forward power flow (power purchase) nor reverse power flow (power sale) occurs. The state where the power is greater than “0” is a state where a forward power flow is generated at the power receiving point PT, and the state where the power is smaller than “0” is a state where a reverse power flow is generated at the power receiving point PT. In the figure, the forward power increases as the power becomes greater than “0”, and the reverse power increases as the power becomes smaller than “0”.

The receiving point power Ppt is obtained by combining the actual demand power Prl and the generated power Ppv. Therefore, for example, when the generated power Ppv-1 is generated when the actual demand power Prl is generated, the power receiving point power Ppt-1 is obtained at the power receiving point PT. The power generated by the solar cell 101 fluctuates depending on conditions such as weather and is not stable. The generated power Ppv-1 shows an example under conditions where the weather is good and the sunshine is strong.
On the other hand, for example, when the actual demand power Prl is generated and the generated power Ppv-2 corresponding to a state where the sunshine is weaker than the generated power Ppv-1 is generated, the power receiving point PT A power receiving point power Ppt-2 having a larger power than Ppt-1 is obtained.

  The actual demand power Prl is easily leveled by integrating the actual demand power of each customer facility 10. On the other hand, even if the generated power Ppv is integrated, it is difficult to obtain the leveling effect even if all the solar cells 101 in the power management area 1 generate power with almost the same behavior every time. For this reason, in the power management area 1 including the solar cell 101, the fluctuation of the power receiving point power Ppt is large.

Generally, the baseline is calculated by treating the power measured at the receiving point as demand power. In other words, the baseline in this case is calculated based on the past performance of the receiving point power. As described above, the baseline calculated based on the power at the receiving point has a certain level of reliability for consumers who do not have a renewable energy-compatible power generation device such as a solar cell.
However, in the case of a consumer including a power generation device compatible with renewable energy like the solar cell 101 of the present embodiment, the power at the receiving point fluctuates greatly as described above. When the baseline is calculated based on the receiving point power having a large fluctuation as described above, the calculated baseline also fluctuates greatly with the receiving point power. Although the baseline is corrected according to the demand power situation on the day, the baseline itself remains large.
In the case where the demand response control is to be performed based on the base line having a large fluctuation according to the generated power as described above, for example, in order to reduce the requested power reduction amount, it is necessary to secure a larger power control range. In some cases, it may not be possible to secure a necessary control amount.

Although it is difficult to predict the amount of power generated by a renewable energy-compatible power generation device every short time, it is possible to predict with some accuracy when viewed over a long period of time such as one day. For this reason, for example, if the scale of the power generation device is known, the power transmission / distribution company or the like can deal with the fluctuation of the baseline based on such a prediction.
For example, with respect to the baseline calculated based on the power received at the power receiving point, a correction (a correction at a later date) for the fluctuation due to the generated power on the day can be performed at a later date (that is, after the day on which the demand response control is performed). . However, in this case, since the demand response control is performed on the same day based on the baseline including the fluctuation due to the generated power to be corrected at a later date, the degree of correction becomes excessive, and as a result, the target power demand The reduction may not be obtained.

  As described above, since the baseline calculated based on the power at the power receiving point greatly fluctuates due to the power generated by the power generation device that supports renewable energy such as a solar cell, it is difficult to perform appropriate demand response control.

Therefore, the power management apparatus 200 of the present embodiment calculates a baseline (an example of the control corresponding reference demand power) used for the demand response control based on the actual demand power in the power management area 1. In the following description, the baseline of the present embodiment calculated based on the actual demand power is referred to as “baseline corresponding to the actual demand power”, and is distinguished from the baseline calculated based on the receiving point power.
The actual demand power correspondence baseline calculated in this way is, for example, in correspondence with FIG. 4, calculated based on the actual demand power Prl. The actual demand power Prl does not fluctuate due to the influence of the generated power Ppv. Therefore, there is no influence of the fluctuation due to the generated power Ppv even as the actual demand power corresponding baseline.
The power management apparatus 200 according to the present embodiment performs control in response to a demand response request so that the demand power amount is reduced according to the target amount obtained based on the actual demand power correspondence baseline.

  FIG. 5 shows a configuration example of the power management apparatus 200 of the present embodiment. The power management apparatus 200 of FIG. 1 includes a network interface unit 201, a demand power actual acquisition unit 202, a predicted demand power calculation unit 203, a power control unit 204, and a storage unit 205.

  The network interface unit 201 communicates with the facility-specific control unit 107 of each customer facility 10 via the network 300.

The actual power demand acquisition unit 202 acquires the actual power demand measured for each customer facility 10 included in the power management area 1.
The demand power performance acquisition unit 202 transmits the demand power performance request to the facility-specific control unit 107 of each customer facility 10 at a predetermined timing.
In the customer facility 10, the facility-specific control unit 107 calculates the actual value of the required power (the required power result) for each predetermined time (for example, 30 minutes), and stores the calculated required power result in association with the time. It has been like that.
The facility-specific control unit 107 (an example of a customer facility-compliant power management apparatus) acquires, for example, power supplied to each electrical facility measured by the distribution board 105. The power supplied to the electrical equipment measured by the distribution board 105 can be treated as power consumption of the electrical equipment. In addition, the demand power performance acquisition unit 202 may acquire power consumption via communication for electrical equipment that can perform communication such as LAN (wired or wireless), power-saving wireless communication, and short-range wireless communication. The facility-specific control unit 107 can calculate the actual demand power associated with each time by integrating the power consumption for each electrical facility acquired as described above for each time. In addition, the facility-specific control unit 107 may calculate the actual demand power based on the power receiving point power measured by the smart meter 108.
The facility-specific control unit 107 transmits the stored demand power record to the power management apparatus 200 in response to receiving the demand power record request.
In the power management apparatus 200, the actual demand power acquisition unit 202 acquires the actual demand power transmitted from the facility-specific control unit 107 in response to the actual demand power request as described above. The demand power performance acquisition unit 202 causes the demand power performance storage unit 251 of the storage unit 205 to store the obtained demand power performance. It should be noted that the information as the actual power demand stored in the actual power demand storage unit 251 is an example of a case where the information is the required power amount corresponding to each predetermined time.

The predicted demand power calculation unit 203 calculates an actual demand power corresponding baseline based on the total demand power performance for each customer facility 10.
That is, when the predicted demand power calculation unit 203 reaches the calculation timing of the actual demand power corresponding baseline, the predicted demand power calculation unit 203 calculates the actual demand power corresponding baseline from the past demand power results stored in the demand power result storage unit 251. (For example, the demand power amount on the 4th day where the demand power amount is high in the last 5 days). The predicted demand power calculation unit 203 calculates the actual demand power corresponding baseline by averaging the power amount as the demand power performance acquired from the demand power performance storage unit 251.
The predicted demand power calculation unit 203 causes the predicted demand power storage unit 252 of the storage unit 205 to store the predicted demand power calculated as described above.

The power control unit 204 performs control such that the required power amount is reduced from the control-compliant reference demand power according to the target amount.
For example, the demand response request is transmitted from the power company to the power management apparatus 200 via the server of the aggregator, for example. In the power management apparatus 200, the power control unit 204 receives the demand response request. The demand response request includes, for example, information (request value) designating the amount of reduction in demand power.

The power control unit 204 executes the demand response control so that the demand power is reduced according to the actual demand power corresponding baseline stored in the predicted demand power storage unit 252 and the request value included in the demand response request.
In this case, the power control unit 204 may set the target amount of demand power reduction based on the request value included in the demand response request, for example, at certain time intervals in the request time zone specified by the demand response request. . For example, when receiving the demand response request, the power control unit 204 first controls the increase / decrease of the actual demand power so as to be equivalent to the baseline, and then changes the requested value from the state equivalent to the baseline. Is controlled so that the actual demand power is reduced in accordance with. In this case, the target amount can be calculated as a total of a control amount for making the actual demand power equal to the baseline and a control amount necessary to reach the requested value from the state equivalent to the baseline. it can. The power control unit 204 executes the demand response control so that the reduction amount of the actual demand power reaches the calculated target amount.

As the demand response control, for example, the power control unit 204 may instruct each of the facility-specific control units 107 of the customer facilities 10 in the power management area 1 to reduce the actual demand power.
There is no particular limitation on the mode of the instruction to reduce the actual power demand. For example, the power control unit 204 requests the facility-specific control unit 107 of each customer facility 10 to calculate the demand based on the individual target quantity obtained by equally dividing the calculated target quantity according to the number of customer facilities 10. An instruction to reduce power may be given. In addition, the power control unit 204 obtains a different individual target amount for each customer facility 10 in accordance with the weighting based on the past demand power results in each customer facility 10, and reduces the demand power by the obtained individual target amount. It may be instructed.
In the customer facility 10 that has received the instruction to reduce the demand power, the demand power is reduced by controlling, for example, the operating state of the electrical equipment determined to be a control target in demand response control. .

  In general, the baseline is calculated based on the power measured at the receiving point as demand power, and calculated based on the actual power measured at the receiving point. It is calculated based on the power. For this reason, if necessary, a customer, a power company, and an aggregator in the power management area 1 may negotiate to use a baseline calculated based on actual demand power.

  As described above, in the present embodiment, an actual demand power corresponding baseline is used as a baseline that is used as a reference when calculating the demand power reduction amount in the demand response. As described above, the actual demand power corresponding baseline of the present embodiment is calculated based on the actual demand power Prl (FIG. 4), and is not affected by the fluctuation due to the generated power Ppv. For this reason, in the present embodiment, it is possible to avoid the problem related to the demand response control as described with reference to FIG. That is, in the present embodiment, the power demand can be appropriately reduced irrespective of the power fluctuation due to the power generation of the storage battery 103 provided in the customer facility 10.

<First Modification>
The customer facility 10 of this embodiment includes a storage battery 103. For this reason, when the storage battery 103 operates to charge or discharge during the request time period during which the demand response control is executed, it is preferable to consider the operation of the storage battery 103. Therefore, as a modified example of the present embodiment, demand response control in consideration of the operation of the storage battery 103 will be described.

First, with reference to FIG. 6, demand response control corresponding to the case where the storage battery 103 performs charging will be described.
The figure shows the charging power Pch (Pch-11, Pch-12), the actual demand power Prl, the receiving point power Ppt (Ppt-11, Ppt-12), the generated power in a certain requested time zone (time t11 to t12). Ppv is extracted and shown.
The charging power Pch shown in the figure is the charging power for the storage battery 103 as viewed in the entire power management area 1. That is, the charging power Pch is obtained by integrating the charging power of all the storage batteries 103 that are charging in the power management area 1.
In this case, a state where the generated power Ppv is generated and the charging power Pch-11 is generated is shown. This is a state where the storage battery 103 is charging at least a part of the generated power Ppv. In the figure, the receiving point power Ppt-11 is obtained by combining the actual demand power Prl, the generated power Ppv, and the charging power Pch-11.
Then, when the charging power to the storage battery 103 in the power management area 1 is reduced in a state where the actual demand power Prl and the generated power Ppv in FIG. Will increase. For example, when the charging power Pch-11 is controlled to be reduced to the charging power Pch-12 in the request time zone (time t11 to t12), the power receiving point power Ppt-11 is changed to the power receiving point power Ppt indicated by a broken line. It changes to increase in the reverse power flow direction like -12. The fact that the power at the receiving point has increased in the reverse power flow direction can be regarded as a decrease in the actual demand power. Therefore, when the operation plan includes the storage batteries 103 to be charged in the requested time zone, the amount of power charged to the storage batteries 103 is suppressed to reduce the actual demand power as demand response control. Can be contributed to. In this case, if, for example, the baseline is set in consideration of the charging operation of the storage battery 103 in the operation plan, the demand response control by suppressing the charging power becomes more effective.
Therefore, the power control unit 204 according to the present modification reduces the charging power of the storage battery 103 that has been planned to be charged in the demand response control based on the target amount of demand power reduction (charging). (Including a state in which it is not performed).
Then, in the demand response control, the power control unit 204 may cause the storage battery 103 that has stopped operating or the storage battery 103 that has been charging to perform a discharging operation. This can further contribute to an increase in the reverse flow of the power at the receiving point (reduction of the actual power demand).

Next, demand response control corresponding to the case where the storage battery 103 discharges will be described with reference to FIG.
The drawing extracts the actual demand power Prl, the receiving point power Ppt (Ppt-21, Ppt-22), and the discharge power Pdc (Pdc-21, Pdc-22) in a certain requested time zone (time t21 to t22). Is shown. The discharge power Pdc shown in the figure is the discharge power of the entire power management area 1. That is, the discharge power Pdc is a discharge power obtained by integrating the discharge powers of all the storage batteries 103 discharging in the power management area 1.
In this case, discharge power Pdc-21 is generated as a component of the power in the reverse power flow direction. That is, it is shown that the storage battery 103 is discharged. In the figure, the receiving point power Ppt is obtained by combining the actual demand power Prl and the discharge power Pdc-21.
In addition, when the control is performed so as to increase the discharge power of the storage battery 103 in the power management area 1 under the state where the discharge power Pdc-21 of FIG. Will increase. For example, when the discharge power Pdc-21 is controlled to increase to the discharge power Pdc-22, the power receiving point power Ppt-21 is increased in the reverse power flow direction as shown by a broken line power receiving point power Ppt-22. Changes to Therefore, if the operation plan includes the storage batteries 103 to be discharged in the requested time zone, the amount of power discharged to the storage batteries 103 is further increased to reduce the actual demand power as demand response control. Can be contributed to.
Therefore, the power control unit 204 of the present modification may include, in the demand response control, a control of increasing the discharge power of the storage battery 103 that has been planned to perform the discharge as compared with the time of the plan.

<Second modification>
Subsequently, a second modified example will be described.
FIG. 8 is a diagram illustrating an example of electrical equipment provided in the customer facility 10 according to the present modification. In this figure, the same parts as those in FIG.

The customer facility 10 of FIG. 1 includes an actual demand power output unit 110. The actual demand power output unit 110 inputs a power receiving point power (value) measured by the smart meter 108. Further, the actual demand power output unit 110 receives an output power (value) output by the power conditioner 102 in accordance with the power generation of the solar cell 101. The electric power output by the power conditioner 102 is treated as an alternating current, and is treated as effective electric power generated by the solar cell 101 among the electric power generated by the solar cell 101.
The actual demand power output unit 110 calculates the actual demand power based on the power receiving point power measured by the smart meter 108 and the output power of the power conditioner 102 at regular intervals (for example, every 30 minutes).
The power receiving point power measured by the smart meter 108 includes the power consumption of each electric facility in the customer facility 10 and the output power of the power conditioner 102. Therefore, as the simplest example, the actual demand power output unit 110 can calculate the actual demand power by subtracting the output power of the power conditioner 102 from the power receiving point power measured by the smart meter 108. .
The actual demand power output unit 110 is connected to the power management device 200 via the network 300 so as to be able to communicate with each other. Although illustration is omitted, in the present modification, for example, a gateway is provided in the customer facility 10, and the actual demand power output unit 110 and the facility-specific control unit 107 communicate with the power management apparatus 200 via the gateway. It may be made communicable.
The actual demand power output unit 110 transmits the calculated demand power results to the power management apparatus 200. The actual demand power output unit 110 stores the demand power result calculated at regular intervals, and transmits the stored demand power result in response to the demand power result request transmitted from the power management apparatus 200. May be. Alternatively, the actual demand power output unit 110 may transmit the calculated demand power result every time the demand power result is calculated at regular time intervals.
The power management apparatus 200 of the present modification calculates the actual demand power corresponding baseline using the demand power results transmitted from the actual demand power output unit 110 of each customer facility 10 in this way.

In the above embodiment, the actual power demand of the customer facility 10 is obtained by integrating the power consumption measured for each electrical facility in the customer facility 10. In contrast, in the present embodiment, the actual demand power output unit 110 calculates the actual demand power based on the two power values of the receiving point power measured by the smart meter 108 and the output power of the power conditioner 102. It can be easily calculated. In this case, the actual demand power output unit 110 includes, for example, a facility-specific control unit, since it is not necessary to perform advanced processing such as collecting and integrating the power consumption of each electric facility in calculating the actual demand power. 107 can be configured as a simple name information processing device.
Further, under the configuration of the present modified example, for example, the customer facility 10 that does not include the facility-specific control unit 107 and does not perform power management in the house can also be subjected to demand response control. In the case of the customer facility 10 that does not include the facility-specific control unit 107, the operation of the electric equipment may be manually adjusted in response to a demand response request corresponding to the demand response control.

<Third Modification>
The predicted demand power calculation unit 203 of the power management apparatus 200 derives a predicted value (predicted demand power) of the demand power for each customer facility 10 using a predetermined prediction parameter, and integrates the derived predicted demand power. An actual demand power corresponding baseline may be calculated based on the actual demand power.
As the prediction parameter, information of a weather forecast in a demand response control period to which the calculated actual demand power correspondence baseline is applied can be given. The predicted demand power calculation unit 203 in this case predicts the power consumption of each customer facility 10 based on, for example, weather forecast information, and corrects the actual demand power of each customer facility 10 based on the predicted power consumption. I do. The actual demand power corrected in this way is the predicted demand power.

  In this case, in the customer facility 10, for example, the facility-specific control unit 107 or the actual demand power output unit 110 derives and derives the predicted demand power by correcting the actual demand power based on the prediction parameter. The predicted demand power may be transmitted to the power management apparatus 200. In this case, the predicted demand power calculation unit 203 may calculate the actual demand power corresponding baseline based on the total of the predicted demand power obtained from each of the customer facilities 10.

Alternatively, the predicted demand power calculation unit 203 obtains the total demand power results for each customer facility 10 and then uses the prediction parameter for the calculated total demand power results to calculate the total demand power results. By making the correction, an overall predicted value of the actual demand power (predicted overall demand power actual) may be obtained. The predicted demand power calculation unit 203 calculates an actual demand power corresponding baseline based on the predicted total demand power results.
By deriving the predicted demand power or the predicted total demand power result by applying the prediction parameters in this way, the calculation accuracy of the actual demand power corresponding baseline can be improved.

  Note that the power management of the present embodiment is suitable when the amount of power that can be generated by the renewable energy compatible power generation device in the power management area 1 is about 1/3 to 3 times the maximum value of the demanded power. It is. When the amount of power that can be generated by the renewable energy compatible power generation device is about 1/3 or more of the maximum value of the demanded power, for example, depending on the time of day, the renewable energy compatible power generation device generates more power than the demand power. In some cases, the power at the receiving point is determined depending on the power. When the amount of power that can be generated by the renewable energy compatible power generation device exceeds about three times the maximum value of the demanded power, the power generation device constantly depends on the power generated by the renewable energy compatible power generation device. It is in a state where the power of the receiving point is determined.

  Note that a program for realizing the functions as the power management device 200, the facility-specific control unit 107, and the like is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by a computer system. , The processing as the power management apparatus 200, the facility-specific control unit 107, and the like may be performed. Here, "to make the computer system read and execute the program recorded on the recording medium" includes installing the program in the computer system. The “computer system” here includes an OS and hardware such as peripheral devices. Further, the “computer system” may include a plurality of computer devices connected via a network including a communication line such as the Internet, a WAN, a LAN, and a dedicated line. The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in a computer system. As described above, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes an internal or external recording medium accessible from the distribution server for distributing the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program in a format executable by the terminal device. That is, any format can be stored in the distribution server as long as it can be downloaded from the distribution server and installed in a form executable by the terminal device. The program may be divided into a plurality of programs, downloaded at different timings, and then combined by the terminal device, or the distribution server that distributes each of the divided programs may be different. Further, the “computer-readable recording medium” holds a program for a certain period of time, such as a volatile memory (RAM) in a computer system serving as a server or a client when the program is transmitted via a network. Shall be included. Further, the program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

1 power management area, 2 commercial power supply, 3 distribution lines, 10 customer facilities, 101 solar cell, 102 power conditioner, 103 storage battery, 104 inverter, 105 distribution board, 106 load, 107 facility control unit, 110 actual demand Power output unit, 200 power management device, 201 network interface unit, 202 actual demand power acquisition unit, 203 predicted demand power calculation unit, 204 power control unit, 205 storage unit, 251 actual demand power storage unit, 252 predicted demand power storage unit

Claims (6)

Predicted demand calculated based on the total demand power measured for each of a plurality of customer facilities included in the power management area, which is a control-compliant reference demand power used as a basis for calculating the demand power reduced by demand response control A power management system including a power calculator. A customer facility corresponding power management device that is provided corresponding to each of the plurality of customer facilities and manages power in the corresponding customer facility,
The predicted demand power calculation unit,
The power management according to claim 1, wherein the control-based reference power demand is calculated based on the actual power demand based on the power consumption of each electrical facility collected by the power management device corresponding to the customer facility in the customer facility. system. The predicted demand power calculation unit,
The power management according to claim 1 or 2, wherein the control-dependent reference demand power is calculated based on a total of predicted demand power derived based on actual demand power measured for each customer facility and a predetermined prediction parameter. system. The predicted demand power calculation unit,
Based on a total predicted power demand value, which is derived based on a total demand power measured for each of a plurality of customer facilities included in the power management area and a predetermined prediction parameter, the control corresponding standard demand The power management system according to claim 1, wherein the power management system calculates the power. Predicted demand calculated based on the total demand power measured for each of a plurality of customer facilities included in the power management area, which is a control-compliant reference demand power used as a basis for calculating the demand power reduced by demand response control A power management device including a power calculation unit. Computer
Predicted demand calculated based on the total demand power measured for each of a plurality of customer facilities included in the power management area, which is a control-compliant reference demand power used as a basis for calculating the demand power reduced by demand response control A program to function as a power calculator.

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