JP2013143815A - Power supply system, power supply control device, power supply method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize power stored by power storage equipment installed as shared equipment on a demand site where there are a plurality of electricity usable locations.SOLUTION: A power supply system comprises: a power storage section installed as shared equipment of a plurality of power supply destinations to store power; a feed section for feeding power supplied to the plurality of power supply destinations via a low voltage distribution line laid and power for charging the power storage section; and a storage power feed section for supplying storage power generated on the basis of the power stored in the power storage section to any, first power supply destination of the plurality of power supply destinations. The storage power feed section is connected to the low voltage distribution line.

Description

  The present invention relates to a power supply system, a power supply control device, a power supply method, and a program.

In demand places with multiple places where electricity is used (for example, apartment housing facilities such as condominiums), the power receiving and transformation equipment installed at the place of demand receives the power supplied from the power company in a lump, and each place where electricity is used There is an electric power supply system for supplying electric power. By using such a power supply system, a service for supplying the supplied power to each place where electricity is used is performed (for example, see Non-Patent Document 1).
By the way, in the case where a photovoltaic power generation facility is provided in a demand place, there is a case where surplus power out of the power generated by the photovoltaic power generation facility can be reversely flowed to the power system of the power company and sold to the power company. is there. However, if the power can be sold to a power company, it is limited to surplus power generated by the solar power generation facility.
In addition, when power storage equipment is provided in a demand place, the reverse flow of power to an electric power system of a power company is restricted. Even if it is a case where it equips with an electrical storage equipment and a photovoltaic power generation equipment, it cannot be made to flow backward to the electric power system of an electric power provider by the restriction | limiting by having an electrical storage equipment. In this way, conditions for reverse power flow to the electric power system of the electric power company are respectively defined.

"Power Supply Solution (Power Supply Service for Condominiums)" [online], NTT Facilities, Inc. [Search January 5, 2012], Internet <URL: http://www.ntt-f.co.jp / service / powersupply_sol />

By the way, a power storage facility is installed as a common facility (equipment of a shared part such as an apartment house facility) in a demand place with a plurality of places where electricity is used, and the power storage facility uses the power stored in the power storage facility. There is a case where a specific load provided in the common part is supplied in an emergency. Such power storage facilities are limited to simply supplying emergency power to the specific load (elevator, pump, etc.). Thus, the power storage equipment installed as a shared facility for supplying emergency power is not used for purposes other than supplying emergency power to the specific load. Such a power storage facility does not normally supply the power stored in the power storage facility, and the power stored in the power storage facility has not been effectively utilized.
However, the cost of the power storage facility in the case of installing such a power storage facility is a cost for the facility only for supplying emergency power.
Moreover, it is common that the user (resident etc.) of the electricity use place of the said demand place jointly bears the expense of the shared facilities of such a demand place. Similarly, when the cost of the power storage facility is jointly borne, the cost of the power storage facility is borne by the user. For this reason, even if the users share the burden, the storage of electricity storage facilities as a common facility in the demand area where there are multiple places where electricity is used, due to an increase in the economic burden of each user. There was a problem that hindered.

  In order to solve the above problem, an object of the present invention is to effectively utilize the electric power accumulated by the power storage facility installed as a common facility in a demand place where there are a plurality of electricity use places.

[1] The present invention has been made to solve the above-described problem, and is provided as a shared facility for a plurality of power supply destinations, and receives power via a power storage unit that stores power and a commercial power line. A power supply unit that generates supply power based on commercial power and supplies power to a plurality of power supply destinations via low-voltage distribution lines that are laid, and a power supply unit that supplies power for charging the power storage unit, and the power storage unit A power storage unit that supplies the stored power generated based on the power stored in the first power supply destination of any of the plurality of power supply destinations, The power supply system is connected to the low-voltage distribution line.

[2] Further, in the present invention according to the present invention, the power supply unit generates supply power based on commercial power received via a commercial power line, and the generated supply power is transmitted via the low-voltage distribution line. Power is supplied to a plurality of power supply destinations, and the power storage power supply unit supplies the stored power to the first power supply destination without supplying the power to the commercial power line.

[3] Further, in the present invention according to the present invention, the power storage power supply unit is configured to supply a voltage of the stored power lower than a voltage at which the power supply unit supplies power to the low-voltage distribution line and supply power to the power supply destination. It is generated higher than the applied voltage and is supplied to the first power supply destination.

[4] Further, in the present invention according to the present invention, the power storage power supply unit supplies the power storage power to the first power supply in a time zone in which a charge of power supplied from the power supply unit is high in one day. It supplies before, It is characterized by the above-mentioned.

[5] In the above invention, the power storage unit may supply the stored power to the first power supply destination according to the amount of power supplied to the plurality of power supply destinations. Features.

[6] Also, in the present invention according to the present invention, a day is divided into a plurality of time zones, and a unit price per unit power amount of the power is determined according to the divided time zones, A storage power control unit is provided that calculates an electricity rate for the power based on unit price information stored in a storage unit and the amount of electric power according to the determined unit price.

[7] Further, in the present invention according to the present invention, the power storage unit stores power supplied from the power supply unit in the power storage unit, and the power storage unit supplies power supplied from the power supply unit. The electric power supplied from the power supply unit is stored in the power storage unit in a time zone where the price is cheap during a day.

[8] Further, according to the present invention, in the above invention, the power storage unit is configured to store electric power stored in the power storage unit rather than a charge when supplying electric power based on commercial power to the first power supply destination. Is supplied to the first power supply destination when the charge is lower when the power is supplied to the first power supply destination.

[9] Also, in the present invention according to the present invention, in the above-described invention, the power storage power supply unit can supply normal power that can be supplied as power for changing a supply time zone in which the power is supplied from the power storage capacity of the power storage unit. The amount of power and the amount of emergency power that can be supplied as backup power in an emergency are set in advance, and the power storage power supply unit supplies a part of the normal power amount to a supply time zone for supplying the power. It is characterized by being supplied as electric power for changing.

[10] Also, in the present invention according to the above-described invention, when the supply of the commercial power is stopped, a second power supply destination (electricity use place) for continuing the supply of the power is determined in advance. Identifying from the information, supplying power to the second power supply destination, and interrupting power supply to power supply destinations of the plurality of power supply destinations excluding the second power supply destination Features.

[11] Furthermore, the present invention provides a power supply control device that controls the supply of power from a power storage unit that stores power supplied via a low-voltage distribution line that is laid, and the power storage unit includes a plurality of power storage units. A low-voltage power supply unit provided as a common facility for power supply destinations, and a power supply unit that supplies power to the plurality of power supply destinations, and a power storage unit that supplies stored power supplied by the power storage unit Connected via a distribution line, and supply the stored power generated based on the power stored in the power storage unit to any one of the plurality of power supply destinations. It is a power supply control apparatus characterized by including the control part which controls to.

[12] Further, the present invention is a power supply method in a power supply system in which a power storage unit is provided as a shared facility for a plurality of power supply destinations, the power supply unit supplying power to the plurality of power supply destinations; The power storage unit that supplies the stored power supplied by the power storage unit is connected via a low-voltage distribution line that is installed, and a plurality of power supply destinations are connected via the low-voltage distribution line that is installed. Electric power to be supplied and electric power for charging the electric storage unit, electric power supplied by the electric power supply unit, electric power storage unit that accumulates electric power, electric power stored based on electric power stored in the electric power storage unit Including a step of supplying a first power supply destination to any one of the plurality of power supply destinations.

[13] Further, according to the present invention, in a power supply system in which a computer included in the power supply system is provided with a power storage unit provided as a shared facility for a plurality of power supply destinations, power is supplied to the plurality of power supply destinations. And a storage power supply unit that supplies stored power supplied by the storage unit are connected via a low-voltage distribution line that is laid, and the plurality of the plurality of power supply units are connected via the low-voltage distribution line that is laid The power feeding unit feeds the power supplied to the power supply destination and the power for charging the power storage unit, the power storage unit stores the power, and the power storage unit is stored in the power storage unit. Supplying stored power generated based on the current power to any one of the plurality of power supply destinations.

  As described above, according to the present invention, it is possible to effectively use the electric power stored by the power storage facility installed as a common facility in a demand place where there are a plurality of electricity use places.

1 is a schematic configuration diagram of a power supply system according to a first embodiment of the present invention. It is a figure explaining the accounting process according to the electric power consumption in 1st Embodiment, and the electric power supply amount. It is a figure which shows the change of the power consumption per day in 1st Embodiment. It is a flowchart which shows the determination process which identifies the normal time and emergency of the electric power supply system concerning 2nd Embodiment of this invention. It is a flowchart which shows the electric power feeding control process at the time of emergency of the electric power supply system concerning 2nd Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
In the power supply system 100 according to the present embodiment, the power supply unit 10 collectively refers to a plurality of electricity usage locations Z (hereinafter referred to as electricity usage locations Z1, Z2, and Z3) via the low-voltage distribution line LW installed in the demand location. It is referred to as “electricity use place Z.” Power is supplied to the power supply destination). The power storage unit BT5 stores electric power. The electricity storage power supply unit PCS5 uses the electricity stored in the electricity storage unit BT5 based on the electricity stored in the electricity storage unit BT5 via any one of the plurality of electricity use places Z (power supply destinations) via the low-voltage distribution line LW. Supply to use place Z (first power supply destination). Thereby, the electric power accumulate | stored by electrical storage part BT5 (electric storage facility) installed in the demand place can be utilized effectively.
Further, by buying and selling the charge / discharge power of the power storage unit BT in the power supply system 100, the following problem that cannot be solved by the current system can be solved.
-Part 1. The electric power stored in the power storage unit BT can be shared without being restricted to the place where electricity is used.
-Part 2. Reduce the economic burden on the installer of power storage unit BT.

  Hereinafter, embodiments of the present invention will be described. In the following description, the overall configuration of the power supply system will be described first, and then various processes in the power supply system will be described. In the present embodiment, a case where the power supply system receives supply from the power system will be mainly described.

[Description of overall configuration of power supply system]
FIG. 1 is a schematic configuration diagram of a power supply system according to an embodiment of the present invention. In FIG. 1, symbol PS is a system power source, symbol HW is a high voltage distribution line, symbol TR is a transformer, symbol LW is a low voltage distribution line, symbols LL1, LL2, and LL3 are loads, symbol BT5 is a power storage unit, and symbol PCS5 is a power storage. Supply section.

First, a power system that supplies power to the power supply system 100 will be described.
The system power source PS corresponds to, for example, a power plant operated by an electric power company (general electric power company, specific-scale electric power company, etc.), and supplies the generated power to the power network NW. The power grid NW is provided with a distribution substation (not shown) that converts power supplied from the system power supply PS into high-voltage power (for example, 6600 V). The high-voltage distribution line HW is a distribution line used to connect a distribution substation and a demand place and distribute high-voltage power from the distribution substation to the demand place. The power supply system 100 is provided in the demand place.
As described above, an existing power system (commercial power system) is configured by the configuration from the system power source PS to the high-voltage distribution line HW that distributes the power from the system power source PS. In addition, although the power supply system 100 of this embodiment receives supply of electric power from such an electric power system, it is not linked to the said electric power system.

Next, the power supply system 100 will be described.
The power supply system 100 includes a power supply unit 10, a stored power control device 20, a power storage facility 30 </ b> C, a low-pressure side meter unit 40, and a low-pressure side meter unit 45.

The power supply unit 10 includes a high-voltage side meter WhH, a circuit breaker CB, a transformer TR, a high-voltage side voltage / current detection unit DTH, and a low-voltage side voltage / current detection unit DTL.
The high-voltage side meter WhH detects the amount of power supplied as high-voltage power and sends the detected amount of power to the stored power control device 20.
The circuit breaker CB blocks the circuit connecting the high voltage distribution line HW and the primary side of the transformer TR in response to a command from the stored power control apparatus 20.

  The transformer TR converts the high-voltage power received via the high-voltage distribution line HW into low-voltage power (for example, AC 100V or 200V) that can be used by general power consumers, and uses each electric place via the low-voltage distribution line LW. Supply to Z. The low-voltage distribution line LW is a distribution line that is used to connect the transformer TR and each electricity use place Z and distribute low-voltage power from the transformer TR to each electricity use place Z. Further, the load LC is all loads connected to the low voltage distribution line LW.

The high voltage side voltage / current detection unit DTH detects the voltage VH and the current IH due to the power supplied by the high voltage distribution line HW, and sends the detected voltage VH and current IH to the stored power control apparatus 20, respectively.
The low voltage side voltage / current detector DTL detects the voltage VL and the current IL due to the electric power converted into a low voltage by the transformer TR, and sends the detected voltage VL and the current IL to the stored power control device 20 respectively.
The power feeding unit 10 described above functions as a so-called power receiving / transforming facility.

  The low-pressure side instrument part 40 detects the electric energy of each electricity use place Z. The low-pressure side meter unit 40 includes low-pressure side meters WhB (WhB1 to WhB3) that detect the amount of electric power at each electricity use place Z. For example, in FIG. 1, the low-pressure side meter WhB1 is provided corresponding to the electricity use place Z1, and the low-pressure side meters WhB2 and WhB3 are provided corresponding to the electricity use place Z2 and the electricity use place Z3, respectively. Yes.

  The low-pressure side meter WhB detects the power consumption consumed in the electricity use place Z and has a communication function with the stored power control device 20. The low-pressure side meter WhB sends the detected power consumption to the stored power control device 20. Further, the low-pressure side meter WhB may have a remote control function for cutting off the supply of power in response to a command from the stored power control device 20.

The low-pressure side instrument unit 45 detects the amount of power of the power storage facility 30C provided in the shared unit ZC. The low-pressure side meter unit 45 includes a low-pressure side meter WhC that detects the amount of power of the power storage facility 30C.
The low-pressure side meter WhC detects the amount of power consumed by the power storage facility 30C and the amount of power supplied from the power storage facility 30C. The low-pressure side meter WhC has a communication function with the stored power control device 20. The low-pressure side meter WhC sends the detected power consumption amount and the supplied power amount to the stored power control device 20, respectively.
Further, the low-pressure side meter WhC may have a remote control function that cuts off the supply of power in response to a command from the stored power control device 20.
Moreover, the low voltage | pressure side meter WhC may have a communication function with 30 C of electrical storage equipment. The low-voltage side meter WhC having a communication function with the power storage facility 30C receives a control command from the power storage power control device 20 to the power storage facility 30C, relays it to the power storage facility 30C, and from the power storage facility 30C to the power storage facility. The control state of 30C is received and relayed to the stored power control device 20.

In FIG. 1, as a plurality of electricity use places Z, an electricity use place Z1, an electricity use place Z2, and an electricity use place Z3 are shown.
The power supply unit 10 is connected to a low-voltage distribution line LW serving as a power distribution system at a demand location. The low-voltage distribution line LW connects the power supply unit 10 to the connection point P1 of the electricity use location Z1 to the connection point P2 of the electricity use location Z2. Up to the connection point P3 of the electricity use place Z3 and the connection point PC of the shared part ZC are connected.
This electric power feeding part 10 produces | generates the electric power supplied to each electricity use place Z and the common use part ZC based on the commercial power received via the high voltage distribution line HW (commercial power line). The power supply unit 10 supplies the generated power to a plurality of electricity use places Z (power supply destinations) and the shared unit ZC through the laid low voltage distribution lines LW.
A load LC is connected to the low-voltage distribution line LW. In addition, a power storage facility 30C is connected to the low-voltage distribution line LWC.
The electric power generated by the power storage facility 30C is supplied from the low-voltage distribution line LWC to the low-voltage distribution line LW side via the low-voltage side meter WhC.

Next, the structure in each electricity use place Z is shown.
A low-voltage distribution line LW1 connected via the low-voltage side instrument WhB1 is laid in the electricity use place Z1. A load LL1 is connected to the low-voltage distribution line LW1. Electric power is supplied to the low-voltage distribution line LW1 from the distribution system (low-voltage distribution line LW) side at the demand location via the low-voltage side meter WhB1.
In the electricity use place Z2, a low-voltage distribution line LW2 connected via the low-pressure side meter WhB2 is laid. A load LL2 is connected to the low-voltage distribution line LW2. Electric power is supplied to the low-voltage distribution line LW2 from the distribution system (low-voltage distribution line LW) side at the demand location via the low-voltage side meter WhB2.
In the electricity use place Z3, a low-voltage distribution line LW2 connected via the low-pressure side meter WhB3 is laid. A load LL3 is connected to the low-voltage distribution line LW3. Electric power is supplied to the low-voltage distribution line LW3 from the distribution system (low-voltage distribution line LW) side at the demand location via the low-voltage side meter WhB3.

Next, the structure in the shared part ZC is shown.
In the shared part ZC, a low-voltage distribution line LWC connected through a low-voltage side meter WhC is laid. A power storage facility 30C is connected to the low-voltage distribution line LWC. Electric power is supplied to the low voltage distribution line LWC from the distribution system (low voltage distribution line LW) side in the demand place. Moreover, the electric power produced | generated by the electrical storage equipment 30 is supplied from the low voltage distribution line LW1 to the electric power low voltage distribution line LW side. Thus, the electric power exchanged between the low voltage distribution line LWC and the distribution system (low voltage distribution line LW) side in the demand place is detected by the low voltage side instrument WhC.

The detail about the electrical storage equipment 30C is shown.
The power storage facility 30C is provided as a shared facility for a plurality of electricity use locations Z (power supply destinations). The power storage facility 30C includes a power storage unit BT5 and a power storage unit PCS5.
The power storage unit BT5 stores electric power. The power storage unit BT5 includes a secondary battery, stores the power supplied from the power storage power supply unit PCS5, and supplies the stored power to the power storage power supply unit PCS5. The secondary battery included in the power storage unit BT5 is, for example, a lead storage battery, a lithium ion battery, or a NaS battery. The power storage unit BT5 is provided as a shared facility in the shared unit ZC.

  The power storage unit PCS5 is installed in the same shared unit ZC as a pair with the power storage unit BT5, and is connected (connected) to the distribution system at the demand place at the connection point PC on the low-voltage distribution line LW. . The power storage unit PCS5 includes an inverter (not shown) inside, and the power storage unit PCS5 is actually connected to a power distribution system at a demand place through the inverter. That is, the DC power stored in the power storage unit BT5 is converted into AC power by the inverter in the power storage unit PCS5 and can be transmitted to the distribution system side (low voltage distribution line LW) in the demand place.

  The power storage unit PCS5 may charge the power storage unit BT5 with power supplied from, for example, a solar battery installed in a demand place. In addition, the power storage unit PCS5 may transmit part of the power supplied from the solar cell to the distribution system side (low voltage distribution line LW) in the demand place. Note that the facility for supplying power to the power storage power supply unit PCS5 is not limited to a solar cell, but may be another distributed power source such as a fuel cell.

The power storage unit PCS5 stores the power supplied from the power supply unit 10 in the power storage unit BT5.
In addition, the power storage unit PCS5 supplies the stored power generated based on the power stored in the power storage unit BT5 to any one of a plurality of electricity use places Z (power supply destinations) via the low-voltage distribution line LW. To the electricity use place Z (first power supply destination).

The power storage unit PCS5 supplies the stored power to the first power supply destination (for example, the electricity use place Z3) without supplying the stored power to the commercial power line. In short, the power storage unit PCS5 adjusts so as to supply the stored power so as not to cause a reverse power flow in the so-called power system.
For example, the power storage unit PCS5 is configured such that the voltage of the stored power is lower than the (power) voltage (voltage on the secondary side of the transformer TR) that the transformer TR of the power supply unit 10 supplies to the low-voltage distribution line LW, and Then, it is generated higher than the (power) voltage supplied from the power supply unit 10 to the low voltage side meter WhB of the power supply destination, and supplied to the first power supply destination (for example, the electricity use place Z3).

In addition, the power supplied from the power storage unit PCS5 to each load is controlled by the power storage unit PCS5 under the control of the power storage power control device 20.
For example, the power storage unit PCS5 may supply the stored power to the first power supply destination (for example, the electricity use place Z3) in a time zone in which the charge of the power supplied from the power supply unit 10 is high in one day. Good.

  For example, the power storage unit PCS5 may supply the stored power to the first power supply destination (for example, the electricity use place Z3) according to the amount of power supplied to the plurality of power supply destinations.

  In addition, the power storage unit PCS5 supplies the power stored in the power storage unit BT5 to the first power supply rather than the charge for supplying the power based on the commercial power to the first power supply destination (for example, the electricity use place Z3). In the case where the charge for supplying to the destination (for example, the electricity usage place Z3) is lower, the stored power may be supplied to the first power supply destination (for example, the electricity usage place Z3).

  In addition, the power storage unit PCS5 includes a discharge (ordinary) power amount (FIG. 3, Pdisc) that can be supplied as power from the power grid out of the power storage capacity (power amount) of the power storage facility 30C, An emergency power amount (Pback) that can be supplied as backup power at the time is preset. Such a power storage power supply unit PCS5 supplies a part of the discharged (ordinary) electric energy as electric power that changes to electric power from the electric power system.

  Furthermore, the power storage unit PCS5 supplies power even in the case of an emergency in which power supply from the system power source PS is stopped due to an accident power failure or a work power failure on the power system side.

The stored power control device 20 (power supply control device) includes a stored power control unit 21 and a storage unit 22.
The stored power control unit 21 obtains the voltage VH and the current IH detected by the high-voltage side voltage / current detection unit DTH. The stored power control unit 21 obtains the voltage VL and the current IL detected by the low voltage side voltage / current detection unit DTL, respectively. The stored power control unit 21 sends a command (command information) for controlling the circuit breaker CB to the power supply unit 10 and blocks the circuit connecting the high-voltage distribution line HW and the primary side of the transformer TR.

The stored power control unit 21 has a communication function with the low-voltage instrument units 40 and 45. The stored power control unit 21 obtains the power amount of each electricity use place Z detected by the low-voltage side meter units 40 and 45. The amount of electric power at each electricity usage location Z obtained by the stored power control unit 21 from the low-voltage side meter portion 40 includes the amount of power consumed at each electricity usage location Z. The amount of power of the shared unit ZC obtained from the low-voltage side meter unit 45 by the stored power control unit 21 is supplied from the power storage facility 30C to the low-voltage distribution line LW side and the amount of power consumed by the power storage facility 30C of the shared unit ZC. There is a power supply amount.
The stored power control unit 21 sends a command (command information) to cut off the supply of power to the low-pressure side meter unit 40 (low-pressure side meter WhB) and the low-pressure side meter unit 45 (low-pressure side meter WhC). There are two commands as commands (command information) for cutting off the supply of electric power. As the two commands, there is a control command for controlling whether or not the power from the power supply unit 10 is supplied to the electricity use place Z as a control command to be sent to the low-pressure side instrument units 40 and 45. Further, as a control command to be sent to the low-voltage side instrument unit 45, there is a control command for controlling whether or not the electric power from the power storage facility 30C is supplied to another electricity use place Z. Note that the control command for controlling whether or not the power from the power storage facility 30C is supplied to another electricity use place Z includes the control command for the power storage facility 30C that controls the power output from the power storage facility 30C.

  The stored power control unit 21 uses the voltage VH and current IH obtained from the high-voltage side voltage / current detector DTH, the voltage VL and current IL obtained from the low-voltage side voltage / current detector DTL, and the electric uses obtained from the low-voltage side meter unit 40. Based on the power amount of the place Z and the information stored in the storage unit 22, the power supply control process is performed.

The stored power control unit 21 sends a command (command information) generated by the above power supply control process to the power supply unit 10, the storage facility 30 </ b> C, the low voltage side meter unit 40, and the low voltage side meter unit 45. Control is performed so as to be in a desired state according to the command (command information).
For example, the stored power control unit 21 performs control so that the power supplied from the power supply unit 10 is accumulated in the power storage unit BT5 during a time when the charge of the power supplied from the power supply unit 10 is cheaper in one day.

In addition, the storage power control unit 21 includes the voltage VH and current IH obtained from the high voltage side voltage / current detection unit DTH, the voltage VL and current IL obtained from the low voltage side voltage / current detection unit DTL, and the voltage obtained from the low voltage side meter unit 40. The storage unit 22 is made to store the power amount of the electricity use place Z, the power amount of the shared unit ZC obtained from the low-voltage side instrument unit 45, and the command (command information) generated by the power supply control process.
The storage unit 22 is configured by a semiconductor memory, and stores a program of processing performed by the stored power control unit 21 and information related to the processing.
Various processes performed by the stored power control device 20 (the stored power control unit 21) and details thereof will be described later.

[Various types of processing when the shared unit is equipped with a power storage unit]
As will be described below, first, control conditions, a control method, and the like in the case where the storage unit 30C is provided in the shared unit ZC will be described.

(Detection of power consumption to prevent reverse power flow)
In the power supply system 100, when the total power supply amount supplied is larger than the total power consumption amount consumed in each electricity use place Z, there is a possibility that a reverse power flow may occur in the power system. Therefore, in order to control the power supply system 100 so as not to generate a reverse power flow from the power supply system 100, the power supply system 100 needs to detect the total power consumption.
For example, as a method for detecting the total power consumption in the power supply system 100, there are the following methods. The stored power control unit 21 in the power supply system 100 implements at least one of the methods 1 to 3 described below.

・ Method 1
Method 1 is a method of detecting a case where the amount of electric power (high-voltage side electric energy) detected by a meter provided on the high-voltage side (high-voltage side meter WhH) is equal to or lower than a predetermined threshold value. .
When the amount of power on the high voltage side becomes 0 (zero) or less, there is a possibility that a reverse power flow to the power system occurs. Therefore, the stored power control unit 21 detects a case where the amount of power on the high voltage side detected by the high voltage side meter WhH is equal to or less than a predetermined threshold value (a positive value close to 0). Note that the amount of power on the high voltage side described above may be information received from a management device (not shown) of a power provider as a measurement result (power consumption information) measured by the power provider. In this case, the stored power control device 20 in the power supply system 100 receives information on a predetermined high-voltage side power amount from a power provider management device (not shown).

・ Method 2
Method 2 is that the total amount of electric power detected by the meter (low-pressure side meter unit 40) provided for each electricity use place Z and the meter (low-pressure side meter unit 45) provided in the common unit ZC is This is a method for detecting a case where the value is equal to or lower than a predetermined threshold value.
The storage power control unit 21 causes the low-voltage side meter units 40 and 45 to detect power consumption with a period of one day, one week, one month, one year, etc. Remember. When the total sum of the stored power consumption as a positive value and the supplied power as a negative value becomes a negative value, the supplied power is in an excessive state and may cause a reverse power flow to the power system. . The stored power control unit 21 counts as described above, and detects a case where the total sum falls below a predetermined threshold value (a positive value close to 0).
The stored power control unit 21 periodically collects data from the low-voltage instrument units 40 and 45. Data from the low-voltage side meter sections 40 and 45 is collected by the stored power control section 21 and is periodically tabulated. The stored power control unit 21 may use the data.

・ Method 3
Method 3 calculates the total amount of electric power from information shared by mutual communication between the low-pressure-side instrument units 40 and 45, and the amount of power consumption is below a predetermined threshold value. It is a method of detecting a case.
When the meters of the low-pressure side meter units 40 and 45 can communicate with each other, the data collection and totalization performed by the stored power control unit 21 may be performed in each meter.

  By implementing any one of Method 1 to Method 3 described above, it is possible to detect a situation where a reverse power flow is expected to occur.

(Control when reverse power flow is expected)
As described above, there is a method shown below as a method of controlling the stored power control unit 21 so as not to generate a reverse power flow when a situation where a reverse power flow is expected to occur is detected. At least one of the following methods 1 to 3 is performed.

・ Method 1
The stored power control unit 21 controls the storage power supply unit PCS5 to stop the supply (discharge) from the power storage unit BT (output ON / OFF control).

・ Method 2
The stored power control unit 21 controls the storage power supply unit PCS5 to control the supply amount from the power storage unit BT5 in order to adjust the power supply amount from the power storage unit BT5. When there are a plurality of power storage units BT5, the storage power control unit 21 controls the power storage power supply unit PCS5 to adjust the total power supply amount from the power storage unit BT5, and the supply amount from each power storage unit BT5. To control.

・ Method 3
The stored power control unit 21 controls the load LC (air conditioner, pump, etc.) of the shared part of the demand place (facility) and adjusts so that the drive amount of the load LC of the shared part increases. For example, by increasing the number of operating loads or increasing the driving amount for each load, the stored power control unit 21 can control the driving amount of the load LC of the common unit to be increased. By controlling in this way, the stored power control unit 21 controls the total power consumption to increase.
By implementing any of the methods described above, the occurrence of a reverse power flow can be avoided when a reverse power flow is expected.

(Control of time during which electric power from power storage unit BT (power storage unit) of power storage facility 30C can be used)
The power storage power control unit 21 controls a time zone for supplying power from the power storage unit BT based on predetermined control information. The predetermined control information includes the following information. The stored power control unit 21 performs control based on at least one of the following information.

・ Information of the time zone where the unit price of the electricity usage fee per unit power amount is high (price information according to the time zone)
-Information on the time zone in which peak power generation is expected within a day-Information on the time zone in which planned power outages (rotary power outages, maintenance, etc.) are expected in advance Note that the storage power control unit 21 stores the above information in advance. It is determined and stored in the storage unit 22.

  By the control based on any of the information shown above, the stored power control unit 21 can control the time zone for supplying the power from the power storage unit BT.

(Conditions for making it possible to use power from the power storage unit BT (power storage unit) of the power storage facility 30C)
There are the following conditions as conditions for making the power from the power storage unit BT available. When sharing power from the power storage unit BT, the power storage power control unit 21 performs control so that the following conditions are satisfied.

The power storage unit PCS5 detects the storage amount (voltage) of the power storage unit BT and stops discharging when the power storage amount of the power storage unit BT becomes equal to or lower than a predetermined lower limit value.

Control the supply amount according to the power consumption pattern based on the periodicity of the power consumption amount for one day or one week.
Based on the power consumption information stored in the storage unit 22, the stored power control unit 21 generates a power consumption pattern in which the power consumption of each electricity usage place Z is tabulated. The stored power control unit 21 stores the generated power consumption pattern in the storage unit 22 and sends it to the stored power feeding unit PCS5. The power storage unit PCS5 detects the power storage amount (voltage) of the power storage unit BT, and controls the supply amount based on the detected power storage amount (voltage) of the power storage unit BT and the transmitted power consumption pattern.
For example, the amount of power based on the power consumption pattern sent to the power storage power supply unit PCS5 is defined as the estimated power consumption at each electricity use place Z. The power storage unit PCS5 controls the amount of power supplied from the power storage unit PCS5 to each electricity use place Z so that the estimated power consumption can be covered by the power from the power storage unit PCS5.
In addition, when the stored power control unit 21 updates the power consumption pattern generated in the past by the generated power consumption pattern, the weighting calculation is performed using the generated power consumption pattern and the power consumption pattern generated in the past. A power consumption pattern to be processed and stored may be generated.

  By determining any of the above-described conditions, it is possible to change the conditions for making it possible to use power from the power storage unit BT (power storage unit) of the power storage facility 30C.

(Measures to be taken when a remaining amount is generated in the amount of power stored in power storage unit BT)
Depending on the balance of charge and supply in one day, there may be a remaining amount of electric power stored in the power storage unit BT that could not be discharged. In such a case, the stored power control unit 21 changes a control rule such as a supply condition in order to supply the power stored in the power storage unit BT more efficiently. As a method for changing the control rule, there is a method shown below.

The stored power control unit 21 relaxes the discharge conditions from the power storage units BT, and changes various setting information so as to increase the discharge amount from each power storage unit BT. The various setting information is information stored in the storage unit 22. An example is shown as various setting information. For example, the discharge time information is set so that the discharge start time is advanced and the discharge end time is delayed so that the supply time is extended. Alternatively, the output voltage control information of the power storage unit PCS5 is set so that the discharge end time and the output voltage from the power storage unit PCS5 are higher than a predetermined value.

(Example of discharge pattern)
The purpose of using power stored in power storage unit BT can be changed according to predetermined setting information. The stored power control unit 21 causes the storage unit 22 to store setting information for changing the purpose of using the power stored in the power storage unit BT.

Setting information when selling power other than the amount of power used among the power stored in the power storage unit BT.
The storage power control unit 21 controls the storage power supply unit PCS5 so as to sell power other than the amount of power used.
Setting information when all the electric power stored in the power storage unit BT is consumed.
The power storage power control unit 21 controls the power storage power supply unit PCS5 so as to consume all of the power stored in the power storage unit BT.
By selecting any of the setting information shown above, the purpose of using the power stored in the power storage unit BT can be changed.

(Emergency power supply control)
Unlike a general power conditioner, the power storage unit PCS5 supplies power even in the case of an emergency in which power supply from the system power supply PS is stopped due to an accidental power failure or a work power failure on the power system side. Such a power storage power supply unit PCS5 is controlled according to a command according to an emergency in response to a command from the power storage power control unit 21. By such control, in the case of an emergency, the low voltage distribution line LW is reversely charged by the storage power supply unit PCS5, but the connection between the primary side of the transformer TR of the power supply unit 10 and the high voltage distribution line HW is the circuit breaker CB. Therefore, there is no reverse power flow to the power system. In this way, the power supply system 100 ensures safety even in an emergency.

(Billing process)
Next, with reference to FIG. 2 and FIG. 3, the billing process according to the power consumption amount and the power supply amount for each consumer will be described.
FIG. 2 is a diagram for explaining a billing process according to the power consumption amount and the power supply amount for each electricity use place Z. As shown in FIG. 2, in the power supply system 100, a billing process is required according to the power consumption and the power supply amount for each electricity use place Z. Moreover, FIG. 3 is a figure which shows the change of the power consumption per day. FIG. 3A shows a change in power consumption per day. FIG. 3B is a diagram showing a change in power consumption when the power storage facility 30C is introduced into an electricity use place that consumes the same power consumption as in FIG.

  Below, the conditions of the billing process in the power supply system 100 are organized.

1) The charge system for purchasing the electricity consumed for each electricity use place Z at a charge for each time zone includes the setting of a charge for each time zone and a flat rate charge. In short, the unit price of the power purchase amount can be selected from the unit price of the hourly fee and the unit price of the fixed rate by setting the contract conditions.
Electricity purchase unit price (electricity purchase unit price A: unit price in the case of purchasing electricity consumed for each electricity use place Z at hourly rates) is determined according to the time zone, and is more than one in a day. Unit prices (for example, power purchase unit prices A1, A2, (A1> A2)) are set (charges by time zone).
In addition, the unit price of purchased electricity amount (unit price of electricity purchased A ′: the unit price when the electricity consumed for each electricity use location Z is purchased at a fixed price) is set to a fixed price all day (fixed price).

2) The charge system for high-voltage power supplied from the power company for each demand place has a fixed charge and no charge for each time zone. The unit price of the fixed amount throughout the day is set as the unit price of power purchased from the power company (unit price C for power purchase).

3) The amount of power Pdisc that can be supplied as power for changing the supply time zone for supplying power from the power storage capacity (power amount) of the power storage facility 30C, and power that can be supplied as backup power in case of emergency A quantity Pback is set in advance.
4) Within one day, a discharge time zone Td (daytime) in which the power purchase unit price A1 is set and a charge time zone Tc (nighttime) in which the power purchase unit price A2 is set are defined. The discharge time zone Td is a time zone for mainly discharging the stored power stored in the power storage unit BT of the power storage facility 30C, and the charge time zone Tc is a time zone for mainly charging the power storage unit BT of the power storage facility 30C. It is.

5) The power storage facility 30C is charged in the charging time zone Tc, and the charged power is discharged in the discharging time zone Td.
6) The amount of power that the power storage facility 30C discharges in the discharge time period Td enables the power amount Pdisc to be supplied as power for sale in the total power amount Ps that is charged.
Further, among the charged total power amount Ps, the power amount Pback is held to be supplied as backup power in an emergency. (Ps = Pdisc + Pback)

Further, in order to simplify the description, the economic efficiency will be described by giving an example of the case where the power consumption amounts are arranged for each place where electricity is used.
7) The specification / charge capacity of the power storage facility 30C is defined as a charge capacity P0.
-Let the depreciation period (life) be the depreciation period TL.
・ Equipment introduction cost is set as equipment introduction cost _CBT .
8) Usage form of power storage facility 30C Charge capacity P0 is divided into an electric energy (Pdisc) for changing the supply time zone for supplying electric power and an electric energy for backup (Pback) in an emergency as follows. .
9) The power purchase unit price for the electricity charges and discharge time periods Td (from 8:00 to 20:00) by time zone is set as the power purchase unit price A1.
The power purchase unit price in the charging time period Tc (from 20:00 to 8:00) is set as the power purchase unit price A2.
1
10) Demand load pattern It is common to each electricity use place.
The power consumption amount in the discharge time zone Td (from 8:00 to 20:00) is defined as the power consumption amount Pd.
The power consumption amount in the charging time period Tc (20:00 to 8:00) is defined as the power consumption amount Pc.

  Based on the above conditions, for example, billing processing by the following arithmetic processing is performed.

Electricity usage fee CH1 (CH2, CH3) at the electricity usage location Z1:
Each of the electricity usage locations Z1 to Z3 will be described by taking the case of the same contract conditions as an example. For example, each electricity use place Z is not provided with a power storage facility 30C, and power is purchased all day. The contract for power purchase at each electricity use location Z is a contract for a charge by time zone.
Calculate electricity purchase price for each time zone.
The purchased power amount in the discharge time zone Td is the power consumption amount Pd in the discharge time zone Td. The electricity purchase price in the discharge time zone Td is (A2 × Pd).
The purchased power amount in the charging time period Tc is the power consumption amount Pc consumed in the charging time period Tc. The electricity purchase price for the charging time period Tc is (A1 × Pc).
When the electricity usage fee CH1 for one day at the electricity usage place Z1 is arranged, it is calculated from the equation (1).

CH1 = (A2 × Pd) + (A1 × Pc) (1)

  The electricity usage charges CH2 and CH3 of the electricity usage places Z2 and Z3 are the same as those of the electricity usage place Z1.

  In the above, the electricity bill of the three electricity use places Z was calculated.

Next, a service provider that provides a service that provides power to residents A to C in each electricity use location Z sorts out the electricity charges paid to the electric utility (such as a general electric utility or a specific electric utility). .
Electricity charges for service providers:
The service provider makes an electricity usage contract with the electricity provider for the demand place. Therefore, the service provider pays the power provider an electricity usage fee of the amount of power obtained by subtracting the amount of power supplied from the power storage unit BT from the amount of power consumed by each electricity usage location Z. The service provider's power purchase contract is, for example, a flat rate contract.
Hereinafter, the electricity purchase electricity charge of the electric power supplied from the electric power company is calculated for each time zone.
As for the purchased power amount in the discharge time zone Td, the power consumption amount in the discharge time zone Td is Pd. The electricity purchase price in the discharge time zone Td is (C1 × (3Pd + Pp)).
The purchased power amount in the charging time period Tc is the power consumption amount Pc consumed in the charging time period Tc. The electricity purchase price for the charging time period Tc is (C2 × (3Pc−Pp).
It should be noted that the electricity sales fee of the power sold from the service provider to the electric utility is not generated because there is no reverse power flow to the power system side.
When the daily electricity usage charge COM in units of demand places is arranged, it is calculated from the equation (2).

COM = (C1 × (3Pd + Pp)) + (C2 × (3Pc−Pp) (2)

In the calculation of the electricity bill, the stored power control unit 21 stores the unit price information TBL, the contractor information TBL, and the contract information TBL in the storage unit 22.
The unit price information TBL stores predetermined contract unit price information in association with the contract conditions. In the contract unit price information, for example, one day is divided into a plurality of time zones, and is determined according to the time zones. In the contract unit price information, the power selling unit price information when the power from the power storage facility 30C is supplied to other electricity use locations and the power purchase unit price information that is supplied for each electricity use location correspond to the above time zone. It is remembered. Each contract unit price can be a fixed unit price that is the same throughout the day.

  The contractor information TBL stores contractor information associated with the contractor identification information that allows the contractor to be uniquely identified.

  The contract information TBL stores contract information for each contractor associated with the contractor identification information that allows the contractor to be uniquely identified. The contract information includes information on whether or not power can be supplied from the power storage facility 30C to other places where electricity is used, information on whether or not to continue power supply in an emergency, and the “charge capacity ( “P0)”, “Electricity for power sale (Pdisc)” and “Electricity for backup in emergency (Pback)” in “Usage form of power storage facility 30C”.

  The stored power control unit 21 refers to various information of the unit price information TBL, the contractor information TBL, and the contract information TBL stored in the storage unit 22, performs the above-described charging calculation process, and performs the electricity bill for each contractor. And the calculated electricity bill is output in association with the contractor information.

(Target facility)
In the above-described embodiment, the case where the power sharing control and the billing process are performed in units of “electricity use place Z” has been described. Examples of facilities for performing power sharing control and billing processing include apartment housing facilities and tenant-type buildings (office buildings). Unlike the processing of the above embodiment, the present embodiment is also used when only power sharing control is performed. Can be applied. For example, facilities that only perform power sharing control include buildings (office buildings), hospitals, factories, and the like that collectively pay a power charge to an electric power company (no need for individual billing like a tenant).

  For example, an office building will be described as an example. The electricity use place Z in the present embodiment is assigned in units of tenants of office buildings. Similarly to the present embodiment, a low pressure Wh meter is provided corresponding to the electricity usage place Z, and the power consumption consumed in the electricity usage place Z and the supplied power supplied from the electricity use place Z are detected. By setting it as such a structure, the control method of the electric power sharing control (electric power sharing) of this application can be applied for every electric use place Z (tenant).

  In addition, when the low voltage | pressure side meter part 40 (Wh meter of a low voltage | pressure side) is not provided corresponding to each electricity use place Z (tenant), from the power consumption consumed in the electricity use place Z, and the electricity use place Z The supplied power to be supplied cannot be detected. Application of the power supply system 100 shown in the present embodiment is difficult because information on the power supplied from the low-pressure side meter section 40 (low-pressure side Wh meter) cannot be obtained. Therefore, a conventional general system, that is, a system in which the low-voltage side meter unit 40 (low-pressure side Wh meter) is not provided corresponding to each electricity use place Z (tenant) is the power shown in this embodiment. The system is configured as a system independent of the supply system 100.

  Even when charging processing is not performed in this way, the configuration for applying the power sharing control (power sharing) control method of the present application is the same configuration as when performing the power sharing control and charging processing described above. It can be. In the above description, an office building is exemplified, but the present invention can be applied to other facilities by adopting the same configuration as that of the present embodiment.

  As shown in the present embodiment, in normal times, by switching the operation state of the power storage facility 30C according to the time zone, the power charged in the time zone of the charging process is discharged in the time zone of the discharging process, thereby improving the efficiency. The power storage facility 30C can be made to function well.

Second Embodiment
Details of the power supply control process in the power supply system 100 will be described with reference to FIG. In the present embodiment, a case where the power supply system is not supplied from the power system will be mainly described.
As described above, the power storage system PCS5 in the power supply system 100 is different from a general power conditioner in the case of an emergency when the power supply from the system power source PS is stopped due to an accident power failure or a work power failure on the power system side. Also, power is supplied to the low-voltage wiring LW.

First, regarding the power supply system 100, the configuration related to the power supply control process in an emergency is arranged.
The stored power control unit 21 of the stored power control device 20 (power supply control device) in the present embodiment sends a command (command information) to the power storage facility 30C according to the supply status of the power supplied to the power supply unit 10, Controls the supply of power from the power storage unit PCS5 (power storage unit BT5).
For example, the stored power control unit 21 supplies the stored power to the electricity use place Z (for example, the electricity use place Z2, the first power supply destination) according to the supply status of the power supplied to the power supply unit 10. In addition, control is performed so that the stored power is not consumed at the electricity usage location Z3 (second power supply destination different from the first power supply location (electricity usage location Z2)). Such a stored power control unit 21 controls the load LL3 that consumes power at the electricity use place Z3 (second power supply destination) according to the supply status of the power supplied to the power supply unit 10, and the load LL3 Control is performed so as to reduce the consumption of stored electric power. Alternatively, the stored power control unit 21 controls the load LL3 that consumes power at the electricity use place Z3 (second power supply destination) according to the supply status of the power supplied to the power supply unit 10, and the load LL3 You may control so that consumption of stored electric power is interrupted.

In addition, the storage power control unit 21 according to the present embodiment stores and supplies power according to the determination result of whether or not the voltage corresponding to the power supplied to the power supply unit 10 falls below a predetermined threshold value. Control is performed so that the stored power is supplied from the unit PCS5 to the electricity use place Z2 (first power supply destination).
The power supply unit 10 detects the supply status of the supplied power, and sends information corresponding to the detected supply status to the stored power control unit 21. For example, the power supply unit 10 detects the supply status of the supplied power based on the supplied voltage.
Based on the information sent from the power supply unit 10, the stored power control unit 21 determines that the voltage supplied to the power supply unit 10 is lower than the threshold value based on the detected supply status.

  In addition, the power storage and power supply unit PCS5 in the present embodiment identifies the first power supply destination and the second power supply destination based on predetermined contract information, and the power supply unit 10 according to a predetermined condition set in the contract information. The supply of power from the power storage power supply unit PCS5 is controlled in accordance with the supply status of the power supplied to the battery.

(Emergency power supply control processing procedure)
Next, a determination process for identifying a normal time and an emergency time in the power supply system 100 will be described. As used herein, the normal time refers to a state in which power is supplied from the power system as shown in the first embodiment, and an emergency means supply of power from the power system. It is a state that has not been received.
FIG. 4 is a flowchart showing a determination process for identifying a normal time and an emergency time of the power supply system.

In the determination process for discriminating between the normal time and the emergency shown in FIG. 4, first, the power supply unit 10 (the high-voltage side voltage / current detection unit DTH) determines the supply status of the power supplied to the power supply unit 10. 10 is detected based on the voltage supplied to 10 (step S10).
The stored power control device 20 (the stored power control unit 21) determines whether or not power is being supplied to the power supply unit 10. This determination is performed by comparing the voltage detected by the high voltage side voltage / current detector DTH with a predetermined threshold value (step S20).

If it is determined in step S20 that power is being supplied to the power supply unit 10 (step S20: Yes), the stored power control unit 21 performs control so that the power supply state is in a normal state. The determination process for discriminating between the normal time and the emergency time according to the supply status is finished (step S30).
In the process of step S30, the stored power control unit 21 controls the power supply unit 10 to supply power to a plurality of electricity usage locations Z (power supply destinations) via the laid low voltage distribution lines LW. In addition, the power storage power control unit 21 controls the power storage unit BT5 to store power. In addition, the stored power control unit 21 uses the stored power generated based on the power stored in the power storage unit BT5, and the stored power supply unit PCS5 is one of a plurality of electricity usage locations Z (power supply destinations). To be supplied to the electricity use place Z (first power supply destination).

On the other hand, if it is determined in step S20 that power is not being supplied to the power supply unit 10 (step S20: No), the stored power control unit 21 controls the power supply state to be in an emergency state. Then, the determination process for discriminating between the normal time and the emergency time according to the power supply status is finished (step S40).
As described above, the power supply system 100 can perform the determination process for identifying the normal time and the emergency based on the supply status of the power supplied to the power supply unit 10.

(Emergency power supply control processing procedure)
Subsequently, an emergency power supply control process (the above-described step S40) by the stored power control unit 21 will be described.
FIG. 5 is a flowchart showing power supply control processing in an emergency of the power supply system.
In step S20 in FIG. 4 described above, when it is determined that power is not being supplied to the power supply unit 10 (step S20: No), the following processing is performed in order.
In describing the emergency power supply control process shown in FIG. 5, the following conditions are defined.
Contract conditions (power supply continuation contract information) for selecting whether or not to continue power supply to the electricity use place Z in an emergency for each electricity use place Z are determined in advance between the service provider and the resident (user). ing. Also, the priority k (priority information) for continuing power supply in an emergency is determined in advance between the service provider and the resident (user). Further, contract information (storage power sale contract information) for selecting whether or not to supply power from the power storage facility 30C is determined in advance between the service provider and the resident (user).
Further, the contract conditions determined as described above are stored in the storage unit 22 in association with the contractor identification information for identifying the contractor in the power supply continuation contract information and the priority information (priority k). Has been. The priority k is information for selectively cutting off the supply of power when a shortage of power to be supplied is expected. When priority k is high, it is defined to be supplied for a long time, and when priority k is low, it is defined that supply may be stopped first.
In addition, the amount of power discharged by the power storage facility 30C during the discharge time period can be supplied up to the power amount Pdisc out of the total amount of power charged as electric power for sale. Further, the amount of power Pback out of the total amount of power charged is retained in order to supply it as backup power in an emergency.

  In the process shown in FIG. 5, first, the stored power control unit 21 interrupts the circuit breaker CB. Thereby, generation | occurrence | production of a reverse power flow can be prevented (step S41).

Next, the electricity storage power control unit 21 uses the electricity of the contractor who has contracted to sell power in an emergency based on the contract information (storage power sale contract information) of each contractor stored in the storage unit 22. The contract power for each use place Z is totaled. The stored power control unit 21 calculates a total value ΣP _back of the power (P _back ) that can be supplied from the power storage facility 30C in an emergency based on this total (step S42).

Next, based on the contract information (power supply continuation contract information) of each contractor stored in the storage unit 22, the stored power control unit 21 uses the electricity of the contractor who has contracted to continue purchasing power in an emergency. The contract power for each use place Z is totaled within a priority range equal to or higher than a predetermined priority k. Stored power control unit 21 calculates an aggregate value .SIGMA.P _EM of power required to be supplied to the emergency by the aggregated by priority k (step S43).

The stored power control unit 21 has a total value of “total value ΣP _{EM of} power required to be supplied in an emergency” having a priority equal to or higher than a predetermined priority k and “supplied from each storage facility 30C in an emergency”. The total value ΣP _back of possible power is compared (step S44).

When it is determined in step S44 that the total value of the “total value ΣP _EM ” having a priority equal to or higher than the predetermined priority k is smaller than the “total value ΣP _back ” (step S44: Yes), the stored power control unit 21 Controls to supply power to the contractor's electricity usage place Z, which has a priority level equal to or higher than the predetermined priority level k as the contract condition, and ends the emergency power supply control process (step S45).

When it is determined in step S44 that the total value of “aggregated value ΣP _EM ” having a priority equal to or higher than the predetermined priority k is equal to or greater than “aggregated value ΣP _back ” (step S44: No), the storage power control unit No. 21 lowers the predetermined priority (decreases the set value of the priority k), limits the power supply range, and continues to supply power (step S46).

  The stored power control unit 21 determines whether or not the set priority value k is appropriate (step S47). If it is determined in step S47 that the set priority value k is appropriate, the process proceeds to step S43.

On the other hand, if it is determined in step S47 that the set priority value k is not valid, the stored power control unit 21 supplies power to the power supply locations Z of all contractors for the power from the power storage facility 30C. Is stopped, and the emergency power supply control process is terminated (step S48).
By the processing in step S48, power supply exceeding the capacity that can be supplied from the power storage facility 30C is interrupted even in an emergency. Thus, by interrupting the power supply exceeding the capacity that can be supplied from the power storage facility 30C, for example, damage to the power storage facility 30C can be prevented. As a result, even if a situation occurs in which power cannot be supplied beyond the capacity that can be supplied from the power storage facility 30C, normal operation can be quickly performed once the power failure is restored. If the power storage facility 30C is damaged because the power supply exceeding the capacity that can be supplied from the power storage facility 30C is not interrupted, the power storage facility 30C is used until the repair is completed even if the power failure is restored. There is a risk that it will not be possible. As described above, the process of interrupting the power supply exceeding the capacity that can be supplied from the power storage facility 30C is an effective means for operating the power storage facility 30C.

As shown in the above embodiment, the power supply system 100 can effectively utilize the electric power accumulated by the power storage facility installed as a common facility in a demand place having a plurality of places where electricity is used.
In addition, in the power storage facility 30C, the power storage unit PCS determines the electricity usage location Z (second power supply destination) to continue power supply from the predetermined contract information when the supply of commercial power stops. The power is supplied to the specified electricity use place Z (second power supply) from among the plurality of electricity use places Z, and the second power among the plurality of electricity use places Z (power supply destinations). The power supply to the power supply destinations other than the supply destination is interrupted.
By pre-determining the form of power supply in an emergency according to the contract conditions, users who need to supply power even in an emergency (places where electricity is used) and users who do not need to supply power in an emergency (use of electricity) Can be quickly identified, so that backup power can be supplied without causing a power failure.
In addition, it is possible to reduce the unit price of electricity bills for all users by optimizing the scale of the power storage facility 30C in consideration of the existence of users (electricity use locations) that do not require power supply in an emergency. It becomes.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes changes and the like without departing from the gist of the present invention.
The instrument unit 40B may further include a blocking unit. Said interruption | blocking part is provided corresponding to the electric power supply destination, and interrupts | blocks the circuit of the low voltage distribution line LW and the wiring in the electricity use place Z (electric power supply destination). As described above, in the case where the blocking unit is provided, the stored power control unit 21 in the present embodiment, depending on the supply status of the power supplied to the power supply unit 10, uses the electricity usage place Z (first power supply destination). ) Is made conductive, and the second cutoff part corresponding to the other electricity use place Z (second power supply destination) is cut off. The stored power control unit 21 receives the first power from the stored power supply unit PCS5 according to the determination result of whether or not the voltage according to the power supplied to the power supply unit 10 falls below a predetermined threshold value. While controlling to supply the stored power to the supply destination, the power consumption consumed by the load LL may be reduced.

  The above-described power supply system 100, the storage power control device 20, the storage facility 30C, and the low-voltage instrument units 40 and 45 have a computer system therein. The operation process of each functional unit is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer system reading and executing the program. Here, the computer system includes a CPU, various memories, an OS, and hardware such as peripheral devices.

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

100 power supply system,
10 Power supply unit,
20 storage power control device (power supply control device), 21 storage power control unit,
22 storage unit,
30C power storage facility, BT5 power storage unit, PCS5 power storage supply unit 40, 45 Low voltage side instrument unit

Claims (13)

It is provided as a common facility for multiple power supply destinations,
Based on the commercial power received via the commercial power line, supply power is generated, and the power supplied to the plurality of power supply destinations via the low-voltage distribution lines installed and the power for charging the power storage unit are supplied. A power feeding unit;
A power storage unit that supplies the stored power generated based on the power stored in the power storage unit to any one of the plurality of power supply destinations;
With
The power storage unit is
The power supply system is connected to the low-voltage distribution line. The power feeding unit is
The generated supply power is fed to a plurality of power supply destinations via the low-voltage distribution line,
The power storage unit is
Supplying the stored power to the first power supply destination without supplying the stored power to the commercial power line;
The power supply system according to claim 1. The power storage unit is
The voltage of the stored electric power is generated lower than the voltage supplied by the power supply unit to the low-voltage distribution line and higher than the voltage supplied to the power supply destination, and supplied to the first power supply destination The power supply system according to claim 1 or 2, wherein: The power storage unit is
Supplying the stored power to the first power supply destination in a time zone in which the charge of the power supplied from the power supply unit is high in one day;
The power supply system according to any one of claims 1 to 3, wherein the power supply system is any one of the above. The power storage unit is
According to the amount of power supplied to the plurality of power supply destinations, the stored power is supplied to the first power supply destination.
The power supply system according to any one of claims 1 to 4, wherein the power supply system is any one of the above. A day is divided into a plurality of time zones, and a unit price per unit amount of the electric power is determined according to the divided time zones, and stored in a storage unit according to the determined unit price. The power supply system according to any one of claims 1 to 5, further comprising: a stored power control unit that calculates an electricity charge of the power based on unit price information and the amount of power. The power storage unit is
The power storage unit stores the power supplied from the power supply unit,
The power storage unit is
In the time zone when the power supplied from the power supply unit is cheap, the power storage unit stores the power supplied from the power supply unit in a cheap time zone.
The power supply system according to claim 1, wherein the power supply system is a power supply system. The power storage unit is
When the charge for supplying power stored in the power storage unit to the first power supply destination is lower than the charge for supplying power based on commercial power to the first power supply destination Supplying the stored power to the first power supply destination;
The power supply system according to any one of claims 1 to 7, wherein The power storage unit includes
Of the power storage capacity of the power storage unit, there are a normal power amount that can be supplied as power for changing a supply time zone for supplying the power and an emergency power amount that can be supplied as power for backup in an emergency. Preset,
The power storage unit is
The power supply system according to any one of claims 1 to 8, wherein a part of the normal power amount is supplied as power for changing a supply time zone for supplying the power. The power storage unit is
When the supply of the commercial power is stopped, a second power supply destination (electricity use place) for continuing the supply of the power is specified from predetermined contract information, and the second power supply destination is specified. 10. The power supply to the power supply destinations other than the second power supply destination among the plurality of power supply destinations is interrupted. The power supply system according to Item 1. A power supply control device that controls the supply of power from a power storage unit that accumulates power fed through a low-voltage distribution line that is laid,
The power storage unit is provided as a common facility for a plurality of power supply destinations,
A power feeding unit that feeds power to the plurality of power supply destinations and a power storage power feeding unit that supplies stored power supplied by the power storage unit are connected via the laid low-voltage distribution line,
A control unit for controlling the stored power generated based on the power stored in the power storage unit to be supplied to any one of the plurality of power supply destinations;
A power supply control device comprising: A power supply method in a power supply system in which a power storage unit is provided as a shared facility for a plurality of power supply destinations,
A power supply unit that supplies power to the plurality of power supply destinations and a power storage power supply unit that supplies stored power supplied by the power storage unit are connected via a low-voltage distribution line that is laid,
The power supply unit supplies power to supply power to a plurality of power supply destinations and the power to charge the power storage unit via the laid low-voltage distribution line, and
A process in which the power storage unit stores electric power;
Supplying the stored power generated based on the power stored in the power storage unit to any one of the plurality of power supply destinations;
A power supply method comprising: A computer provided in the power supply system
In a power supply system in which a power storage unit is provided as a shared facility for a plurality of power supply destinations, a power supply unit that supplies power to the plurality of power supply destinations, and a power storage power supply unit that supplies stored power supplied by the power storage unit Are connected via a low-voltage distribution line laid,
The power feeding unit feeds the power supplied to the plurality of power supply destinations and the power for charging the power storage unit through the laid low-voltage distribution lines, and
The power storage unit stores electric power;
The power storage power supply unit supplies the stored power generated based on the power stored in the power storage unit to any one of the plurality of power supply destinations;
A program for running.

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