JP2012196122A - In-region power demand and supply control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-region power demand and supply control system which can perform power supply by controlling power generation and power storage processing in a user as well as utilizes a power generation facility and a power storage facility of the user sufficiently.SOLUTION: An in-region power demand and supply control system of the invention controlling a power demand amount of a power user in a region, and power by a reverse power flow includes: a reverse power flow user having a home power distributor which controls power supply in a house, power generation, and a reverse power flow, and a home gateway which detects generated power, storage power, and power demand in the house with a power sensor in the home power distributor, and controls the power supply; an electric power company performing commercial power supply to houses in the region, and making power generation request, power storage request, and power demand request according to a power supply state, of the reverse power flow user in the region; and a region management server controlling power supply by inquiring of the reverse power flow user in the region about the reverse power flow, possible storage power, and possible demand power, after receiving a control request from the electric power company.

Description

  TECHNICAL FIELD The present invention relates to a power control system in a region including a natural energy power plant, a consumer with a natural energy power generation facility and a power storage facility, and a general consumer such as a detached house or an apartment house. The present invention relates to a regional management server to be connected and managed and a regional power supply and demand control system for managing energy supply and demand equipment within a customer.

In recent years, due to interest in clean energy, power generation facilities using natural energy such as solar power generation have been provided in individual houses (customers).
However, in the case of power generation using natural energy, for example, in the case of photovoltaic power generation, there is a change in the amount of power generation due to the season and weather, so that the power of the own house cannot be self-supplied, or the generated power is accumulated and further Stable power generation may not be possible, such as when the amount of power generation is excessive.

For this reason, there is a system in which the arbitration server performs control for operating household appliances (hereinafter, household appliances) for each consumer in order to balance the power supply and demand between the power plant and the consumer having the power generation facility. (For example, refer to Patent Document 1).
In Patent Document 1, an arbitration server receives a supply request for the amount of power necessary for the operation of home appliances at each consumer from the consumer. The arbitration server then allows or rejects the supply request in consideration of the current total supply amount with respect to the supply request from the consumer.
Further, when the power demand increases and power corresponding to the supply request cannot be supplied to all the consumers, the arbitration server determines the urgency level according to the priority set in advance between the consumers or the type of home appliances. The home appliances with a low price are temporarily stopped, the operation time between the home appliances is shifted, or the capacity of the home appliances is changed.

In addition, the trading of power generated by consumers with natural energy is opened, and the power company purchases the power stored by the consumers through the management center that manages the amount of power stored in the consumers, There is a business model that promotes leveling (for example, see Patent Document 2).
In this patent document 2, in a consumer having a power generation facility using solar cells, in order to effectively use the power generated by the power generation facility without discarding when the power generation amount of the power generation facility exceeds the demand of the customer. Requires a configuration for storing surplus power in a storage battery.
However, regarding the buying and selling of power generated by current consumers, in the case of power generation equipment having a storage battery, it is not possible to distinguish between power stored by cheap night power and power generated by sunlight during the day. For this reason, selling power stored by nighttime power to a power company in the daytime will cause a margin, and the power company will incur losses, and will not buy power from customers with power generation facilities with storage batteries. This is a power purchase system.
In this patent document 2, the management center strictly manages the origin of the power stored in the consumer and notifies the power company so that the power supplied from the commercial power system and the power generated by the solar power generation system And the purchase price can be set separately from the sales price. Thereby, the incentive with respect to the consumer who installed the solar cell and the storage battery is given, and it becomes the structure which promotes the equalization of electric power load by spreading a storage battery.

In addition, it is necessary to control reverse power flow from a distributed power generator having a plurality of distribution systems connected to an electric power company, to which a large number of consumers are connected. That is, when a reverse power flow is made from each consumer, the voltage at the interconnection point tends to increase as the distance from the substation increases. Therefore, the farther the position of the interconnection point is from the substation, the higher the frequency of disconnection and interconnection processing of the grid interconnection device. As a result, opportunities for reverse power flow are reduced, resulting in unfairness among consumers within the same distribution system.
For this reason, in order for the electric power company to accept the reverse power flow fairly while restraining the burden on the power distribution system, the customers are grouped in consideration of the physical characteristics of the power network, and the power distribution system has a predetermined reverse power flow. Thus, there exists a structure which controls the reverse power flow electric power of each consumer in a group (for example, refer patent document 3).

Moreover, in addition to the introduction of solar cells, there is a configuration in which an in-vehicle battery is connected to a supply system of solar power generated by solar cells (hereinafter referred to as power generation), and the in-vehicle battery is also charged by the generation of solar cells. (For example, refer to Patent Document 4).
Accordingly, it is expected that effective use of natural energy can be expected by covering the in-vehicle battery with solar cells.
However, even in the configuration of Patent Document 4, schedule management for covering the instability of natural energy has been devised. That is, the user proposes a method of appropriately using commercial power in response to a desire to charge at as low a cost as possible within the scheduled time.

JP 2010-193562 A JP-A-2005-185016 JP 2010-200509 A JP 2010-268640 A

The system of Patent Document 1 attempts to stabilize the power distribution system by controlling the power usage on the demand side from the viewpoint of the power company.
It can be assumed that an effect of stabilizing the power distribution system can be obtained by successfully operating the arbitration server for the control of power usage on the demand side.
However, considering that a large amount of solar cells will be introduced on the demand side and that storage batteries will be introduced to use the energy without waste, the power generation capacity of consumers will be further utilized as a function as a power plant or power storage plant. There is a need to.
The system of Patent Literature 1 is not configured to fully utilize the power generation equipment and power storage equipment of the customer, and cannot fully utilize the power generated by the customer.

Moreover, since the system of patent document 2 opens and sells electric power, it is an indispensable element to carry out a fair transaction by accurately measuring each electric power source (electric power generation source).
However, considering the large-scale introduction of power generation facilities using natural energy in the future, the economic principle is to leave the generation and demand of electricity to nature (for example, weather conditions) or to sell power to a higher price. In operation, it is assumed that there is a problem that the stable supply of electric power is hindered.
Therefore, similarly to Patent Document 1, the system of Patent Document 2 is not configured to fully utilize the power generation facility and the power storage facility of the customer, and cannot fully utilize the power generated by the customer. .

Moreover, the system of patent document 3 is an idea made | formed in order to accept natural energy in a power distribution system.
However, as already mentioned, the amount of power generation will fluctuate greatly due to the nature.
For this reason, there is a limit in accepting power to the distribution system, and if this limit is exceeded, reverse power flow may be prohibited and energy may be discarded.
In order to more actively use natural energy, it is necessary to control the storage of electric power to the storage battery and the supply of electric power from the storage battery.
Therefore, similarly to Patent Document 1, the system of Patent Document 3 is not configured to fully utilize the power generation facility and the power storage facility of the customer, and cannot fully utilize the power generated by the customer. .

Further, the system of Patent Document 4 is an invention that tackles problems that will occur in the future with the spread of EV (Electric Vehicle).
However, from the user's point of view, it is a method that makes good use of the power of the power company only when necessary, but from the power distribution system, as described in Patent Document 1, the vehicle battery is charged. There is also a desire to control demand by charging the on-vehicle battery at a low cost in order to suppress fluctuations in load.
That is, it is assumed that there is a problem that devices that demand power scheduled with the same logic cannot supply stable power to the whole when the demand period is concentrated.
Therefore, similarly to Patent Document 1, the system of Patent Document 4 is not configured to fully utilize the power generation facility and the power storage facility of the customer, and cannot fully utilize the power generated by the customer. .

As mentioned above, in order to achieve both stable power supply in the distribution system and effective use of power generated by natural energy, operate a system that organically combines power and storage facilities in multiple customers It is necessary to do.
Furthermore, the introduction of power generation facilities using natural energy ahead is expected to progress further.
However, there are many types of power generation equipment, depending on the region and the form of the building. To handle all of these managements at the power plant, it is thought that the power distribution equipment will be large and the processing will be complicated. .
In addition, in order to configure an organic system, communication technology and power control technology are required, but the control level differs depending on the contents to be realized according to each variety, and the cost also differs.
As a result, in order to determine the control method of the power generation facility and the power storage facility, since it involves the whole social system, it is very difficult to determine the specifications.

  The present invention has been made in view of such circumstances, and the power generation facility and the power storage facility of the customer that can control the power generation and power storage processing in the customer and can stably supply power in the distribution system. An object of the present invention is to provide an in-region power supply and demand control system that has a configuration that fully utilizes power.

  The regional power demand management system of the present invention is a regional power demand management system that controls the amount of power demand and the amount of power supplied by reverse power flow in a consumer in the region, and generates power using natural energy. A power storage facility that stores power, a home power distributor that controls power supply, power generation, and reverse power flow in the home, and a power sensor in the home power distributor to generate power generated by the power generation facility, A power control device provided in a reverse power flow consumer having a stored power and a home gateway for detecting power demand in the home and controlling the power supply in the home, supply of commercial power to the houses in the region, and Requests of power generation requesting power generation according to the power supply status, power storage requests requesting power storage, and demand requests requesting demand from the reverse power flow consumers in the region A reverse power flow is provided to all reverse power flow consumers in the region in response to a request for control of the request signal from the power company and a server provided in the power company that outputs each request signal of the request. A regional management server that inquires about possible power, power that can be stored, and power that can be demanded, and the home gateway responds to the query and generates power, stored power, and demand power that is obtained by the power sensor. Based on the above, electric power capable of reverse flow, electric power that can be stored, and electric power that can be demanded are obtained and output as an answer to the regional management server, and the regional management server aggregates the answers from each of the reverse flow consumer Then, according to a preset selection rule, a processing control signal instructing power generation processing, power storage processing, and demand processing corresponding to the control request is selected. And outputs to the house.

  In the regional power demand management system of the present invention, the regional management server ranks the reverse power flow consumers according to the answer according to a preset ranking rule, and in order from the top of the rank, The power in the answer is added until the required power in the control request from the electric power company is obtained, and the reverse power demand to request the processing corresponding to the control request to the reverse power consumer up to the rank that becomes the required power. It is characterized by choosing as a house.

In the in-region power demand management system of the present invention, the ranking rule is: When the request from the power company is the power generation request, Aa. In the case of a commercial charge state where the generated power in the house is excessive and the power storage facility is charged with the commercial power, Ab. In the case of a self-charging state in which the generated power in the house is excessive and the power storage facility is charged with the generated power of the power generation facility, Ac. In the case of a commercial power receiving state where the generated power in the house is insufficient and the commercial power is being received, Ad. In the case where the generated power in the house is insufficient and in a commercial charging state, the order is Aa, Ab, Ac, Ad. In the same case, the higher the generated power corresponding to the requested power, the higher the rank B. When the request from the electric power company is the request for power storage, Ba. In the discharging state where the generated power in the house is insufficient and the power storage facility is being discharged, Bb. In the case where the generated power in the house is insufficient and is in a commercial power receiving state, Bc. In the case of a reverse power flow state where the generated power in the house is excessive and the reverse power flow is performed, Bd. In the case where the generated power in the house is excessive and the self-charging, the order is Ba, Bb, Bc, Bd. In the same case, the higher the stored power corresponding to the required power, the higher the rank And the definition
C. When the request from the electric power company is the demand request, Ca. When the generated power in the house is insufficient, the discharging state, and the state after accepting the request is the commercial charging, Cb. In the case where the generated power in the house is insufficient, is in the discharging state, and the state after accepting the request is the commercial power reception, Cc. When the generated power in the house is excessive, the power flow is in the reverse power flow state, and the state after accepting the request is the commercial charge, Cd. When the generated power in the house is excessive, in the reverse power flow state, and after accepting the request, the state is the order of Ca, Cb, Cc, Cd in the case of the self-charging, It is defined that the higher the power demand corresponding to the required power, the higher the rank.

  In the regional power demand management system according to the present invention, the in-house power distributor has a plurality of switches, and the home gateway has the power generation facility and the power storage facility in accordance with the conduction and non-conduction states of the switches. And a connection state with the power supply line of the power company, and each of the reverse power flow process, the power storage process and the demand process is controlled.

  In the regional power demand management system according to the present invention, the home gateway is a control in which control rules for the switch are defined for each state of the reverse power flow process, the power storage process, and the demand process of the switch in the residential power distributor. Based on the in-home storage unit storing the table, the remaining capacity, the generated power obtained from the power sensor, the stored power, the discharged power, the state of the power consumed in the home and the control from the regional management server, The control rule for each state is read from a control table, a duplexer control unit that controls a switch in the in-house power distributor based on the control rule, and a remaining capacity in the power storage facility is obtained from a power sensor A storage battery remaining capacity calculation unit that is obtained by integrating the storage power and discharge power of the power storage facility in time units And features.

  According to the present invention, since the regional management server manages a plurality of backflow consumers in a predetermined region, a power generation request, a power storage request and a demand are sent to a plurality of backflow consumers via the regional management server. Power generation and storage facilities that can make requests and control reverse flow consumers so that they can be seen as virtual general consumers and power plants and power storage facilities when viewed from the power company. In addition, it is possible to control an accurate supply and demand balance of power in a commercial low-voltage line without handling all the complicated situations (state transitions) that occur for each environment.

It is a block diagram which shows the structural example of the local electric power supply-and-demand control system by one Embodiment of this invention. It is a conceptual diagram which shows the relationship between the electric power company 3 and the reverse power consumer 1 explaining the technical idea of this invention. It is a conceptual diagram which shows the structural example of the residential power divider | distributor 12 in this embodiment. It is a block diagram which shows the structural example of the home gateway 14 in this embodiment. It is a block diagram which shows the structural example of the area management server 2 in this embodiment. It is a figure which shows the structural example of the control table 145 in this embodiment. It is a figure which shows state transitions, such as an electric power generation and electrical storage in the residential power divider | distributor 12, according to the numerical value of the generated electric power Pp. It is a figure which shows an example of the control sequence in the electric power company 3, the regional management server 2, and a dwelling unit (reverse power flow consumer 1) in a power generation request. It is a table which shows the ranking result of the reverse power consumer 1 which the total part 22 of the area management server 2 produces | generates. It is a figure which shows an example of the control sequence in the electric power company 3, the regional management server 2, and a dwelling unit (reverse power flow consumer 1) in an electrical storage request | requirement. It is a table which shows the ranking result of the reverse power consumer 1 which the total part 22 of the area management server 2 produces | generates. It is a figure which shows an example of the control sequence in the electric power company 3, the regional management server 2, and a dwelling unit (reverse power flow consumer 1) in a demand request. It is a table which shows the ranking result of the reverse power consumer 1 which the total part 22 of the area management server 2 produces | generates.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram showing a configuration example of a regional power supply and demand control system according to an embodiment of the present invention.
In FIG. 1, an intra-regional power supply and demand control system includes a reverse power consumer 1 (power control device), a regional management server 2, a server of an electric power company 3 (power adjustment server provided in the electric power company 3 to be described later) and a conventional electric power network. 4. Each reverse power consumer 1 is connected to the regional management server 2 via the wide area network 5 and transmits / receives various data to / from the regional management server 2.
The regional management server 2 is connected to the power adjustment server of the power company 3.
Conventional power grid 4 is the power (AC power) supplied by power company 3 to customers who do not have power generation facilities (AC power) generated by power plant 41 (AC power, hereinafter unless otherwise specified, The power is an AC power supply network.

The reverse power flow consumer 1 has a power control device including a solar battery 11, a home power distributor 12, a storage battery 13, and a home gateway 14 in a house.
The home gateway 14 detects the power generation state of the solar cell 11, controls the in-house power distributor 12, and performs various processes such as power storage processing for the storage battery 13, power reception processing from the power company 3, and reverse power flow processing to the power company 3. Is controlled (detailed later).
Upon receiving a power control request signal (power generation request, power storage request, and demand request request signal) from the power company 3, the regional management server 2 responds to these power control request signals to each reverse power flow consumer. Each of the power storage processing, power reception processing, and reverse power flow processing of 1 is controlled (detailed later).

Next, FIG. 2 is a conceptual diagram showing the relationship between the electric power company 3 and the reverse power consumer 1 for explaining the technical idea of the present invention.
Conventionally, as shown in FIG. 2 (a), when the generated power is surplus in the reverse flow consumer 1 (when the generated power exceeds the demand at home), the power company 3 (that is, the low voltage line of the power company 3). If the surplus power flows backward and the generated power is less than the demand, power is supplied from the power company 3.
On the other hand, according to the present embodiment, the power company 3 outputs the above-described power control request signal to the regional management server 2, and the regional management server 2 informs the reverse flow consumer 1 based on this request signal. On the other hand, power generation processing, power storage processing, and reverse power flow processing are controlled.
Thereby, as shown in FIG.2 (b), the electric power company 3 makes the reverse power flow consumer 1 grouped for every area in addition to the power station 41 which self has, a virtual power station, a virtual power station, and It can be controlled as a virtual consumer, and in response to a rapid change in power demand, the shortage and surplus of power can be eliminated within the region, and stable power supply can be performed.

Next, FIG. 3 is a conceptual diagram illustrating a configuration example of the in-home power distributor 12. As shown in FIG. 3, a communication interface 121, DC (direct current) / DC converters 122 and 123, DC / AC (alternating current) converters 124 and 125, a diode 126, power measuring devices (power sensors) m1, m2, and m3, switches SW1, SW2, SW3, SW4, and SW5 are provided. Here, for example, electronic switches are used as the switches SW1, SW2, and SW3, and switches SW4 and SW5 are, for example, electronic switches or switches that have a function of switching the direction of current flow by controlling voltage or phase. Moreover, you may use the mechanism components which cut | disconnect an electrical connection by turning on and off an electric wire physically.
The DC / DC converter 122 is a one-way converter that supplies electric power from the solar cell 11 only in the direction of the power meter m1, and converts the electric power generated by the solar cell 11 through a diode 126 into a preset voltage. Output. Here, the DC / DC converter 122 has an input terminal connected to the cathode of the diode 126 and an output terminal connected to the common terminal 3 of the switch SW1. The anode of the diode 126 is connected to the solar cell 11.

The power meter m1 measures the generated power Pp, which is the power output from the output terminal of the DC / DC converter 122, and outputs the generated power Pp to the home gateway 14 via the communication interface 121.
In the switch SW1, the terminal 1 is connected to the terminal 124a of the DC / DC converter 124, the common terminal 3 is connected to the output terminal of the DC / DC converter 122, and the terminal 2 is in an open state. The switch SW1 connects the output terminal of the DC / DC converter 122 and the terminal 124a of the DC / AC converter 124 in the on state (the common terminal 3 is connected to the terminal 1), while the off state (the common terminal). 3 is connected to terminal 2).

  The DC / DC converter 123 is a bidirectional converter that supplies power at a preset voltage in any direction of the storage battery 13 and the power measuring device m2, and supplies power under the control of the distributor control unit 141. To control the direction. In the DC / DC converter 123, an input / output terminal 123a is connected to the storage battery 13, and an input / output terminal 123b is connected to the common terminal 3 of the switch SW2. Further, the DC / DC converter 123 supplies power for storage to the storage battery 13 from the power meter m2 side in the storage state in which the storage battery 13 is stored, and in the discharge state in which the storage battery 13 is discharged, the storage battery 13. To supply power to the power meter m2.

The power meter m2 measures the stored power Ps, which is the power input to the DC / DC converter 123 in the storage state, while the discharge is the power output from the DC / DC converter 123 in the discharge state. The power Pd is measured. Here, the power meter m2 detects the state of charge and discharge based on the polarity of the current (the direction in which the current flows).
In the switch SW2, the common terminal 3 is connected to the terminal 123b of the DC / DC converter 123, the terminal 2 is open, and the terminal 1 is connected to the terminal 125a that is the input terminal of the DC / AC converter 125. The switch SW2 connects the terminal 123b of the DC / DC converter 123 and the input terminal 125a of the DC / AC converter 125 in the ON state (the common terminal 3 is connected to the terminal 1), while the OFF state ( The common terminal 3 is not connected to the terminal 2).

The DC / AC converter 124 converts the power of the DC voltage supplied from the terminal 124a into the power of the preset AC voltage and outputs it from the terminal 124b, and also converts the power of the AC voltage input from the terminal 124b. , A bidirectional converter that converts power into a preset DC voltage and outputs the power from the terminal 124a.
In the switch SW5, the common terminal 3 is connected to the terminal 124b of the DC / AC converter 124, the terminal 2 is open, and the terminal 1 is connected to an external commercial low-voltage line (power supply line from the power company). . When the switch SW5 is in the on state (the common terminal 3 is connected to the terminal 1), the switch 124b connects the terminal 124b of the DC / AC converter 124 and the commercial constant pressure line, and is in the off state (the common terminal 3 is connected to the terminal 2). In this case, the terminal 124b of the DC / AC converter 124 is not connected to the commercial constant pressure line.

  The DC / AC converter 125 has an input terminal 125a connected to the terminal 2 of the switch SW3 and an output terminal connected to the common terminal 3 of the switch SW4. The DC / AC converter 12 converts the power of a predetermined DC voltage input from the common terminal 3 of the switch SW3 to the input terminal 125a into the power of a preset AC voltage, and switches from the output terminal to the switch. Output to terminal 1 of SW4.

In the switch SW4, the common terminal 3 is connected to a home power supply line that supplies power to home devices, the terminal 2 is connected to the output terminal 125b of the DC / DC converter 125, and the terminal 1 is a terminal of the DC / AC converter 124. 124b. The switch SW4 supplies the power of the AC voltage output from the DC / AC converter 125 to the residential power supply line while the common terminal 3 and the terminal 2 are connected, while the common terminal 3 is the terminal. 1, the power of the AC voltage output from the common terminal 3 of the switch SW5 is supplied to the home power supply line.
The power meter m3 measures the stored power Ps, which is the power supplied from the output terminal of the DC / AC converter 125 to the residential power supply line in a state where the common terminal 3 and the terminal 2 are connected, In the discharge state, the discharge power Pd that is the power output from the DC / DC converter 123 is measured. Each of the power meters m1, m2, and m3 outputs the measured power to be measured to the home gateway 14 via the communication interface 121 as monitor data (Pp, Ps, Pd, Pc).

In the switch SW3, the common terminal 3 is connected to the output terminal of the DC / DC converter 122, the terminal 1 is open, and the terminal 2 is connected to the input terminal of the DC / AC converter 125. When the switch SW3 is in the on state (the common terminal 3 is connected to the terminal 2), the switch SW3 connects the input terminal of the DC / AC converter 125 and the output terminal of the DC / DC converter 122, and is in the off state (the common terminal 3 is In the case of connection to terminal 1, the input terminal of DC / AC converter 125 and the output terminal of DC / DC converter 122 are not connected. That is, the switch SW3 supplies the DC voltage power output from the DC / DC converter 122 to the input terminal of the DC / AC converter 125 in the ON state in which the common terminal 3 and the terminal 2 are connected, In the state where the common terminal 3 is connected to the terminal 1, the DC voltage power output from the DC / DC converter 122 is not supplied to the input terminal of the DC / AC converter 125.
The communication interface 121 supplies a control signal for switch control from the home gateway 14 to each of the switches SW1, SW2, SW3, SW4, and SW5, and outputs monitor data ( Pp, Ps, Pd, Pc) are output to the home gateway 14.
Further, each of the power measuring devices m1, m2, and m3 described above obtains each power from the voltage measured by the voltmeter inside the measuring device and the current measured by the ammeter inside the measuring device.

Next, FIG. 4 is a block diagram illustrating a configuration example of the home gateway 14. As shown in FIG. 4, the home gateway 14 includes a distributor control unit 141, a storage battery remaining capacity calculation unit 142, a weather forecast inquiry unit 143, and a home storage unit 144.
The distributor control unit 141 controls the home power distributor 12 according to the control table 145 stored in the home storage unit 144.
The storage battery remaining capacity calculation unit 142 calculates the remaining capacity SOC of the storage battery 13 based on the storage power Ps (W) and the discharge power Pd (W) in the monitor data supplied from the home power distributor 12 using the following formula (1). To do.
SOC = (Pint + (KcΣPs− (1 / Kd) ΣPd)) / Pmax (1)
In the equation for obtaining the SOC, the coefficient Kc is a charging efficiency coefficient in the storage battery 13 (0 <Kc <1). The charging efficiency coefficient Kc is a combination of loss in power conversion from AC to DC, voltage conversion in DC, loss due to internal resistance in the battery cell constituting the storage battery 13, and combination of these battery cells in series and parallel operation. The loss during charging of the storage battery 13 by the control circuit in the storage battery 13 is determined experimentally, and the electric energy given to the storage battery 13 determined by each loss is actually applied to the storage battery 13. It is a charging efficiency coefficient which shows the ratio of the electrical energy charged. Here, the control circuit in the storage battery 13 is a circuit that performs safety control, balance control, and high voltage control of individual battery cells, and is generally a cell management that is used in a storage battery composed of battery cells. An electronic circuit called a unit or battery management unit.
Kd is a discharge efficiency coefficient in the storage battery 13 (0 <Kd <1). Loss in conversion of electric power from direct current to alternating current, loss in voltage conversion in alternating current, loss due to internal resistance of battery cell constituting storage battery 13, and loss in discharging from storage battery 13 by control circuit in storage battery 13 Is obtained experimentally. Then, when supplying the electric energy stored in the storage battery 13 to the outside based on each experimentally determined loss, the energy discharged from the storage battery 13 is reduced by the above-mentioned loss and actually The discharge efficiency coefficient indicating the ratio supplied to is obtained. Therefore, when the power capacity Pd is supplied, substantially (1 / Kd) Pd is discharged from the storage battery 13 and consumed.

Here, Pint (Wh) is the accumulated initial power amount at the time when the storage battery is connected to the in-home power distributor 12. Pmax (Wh) indicates the rated capacity of the storage battery 13 or the electric energy of the storage battery 13 when the SOC is 100%.
That is, the storage battery remaining capacity calculation unit 142 calculates each of the stored power Ps and the discharged power Pd as an integrated value for each time unit, that is, for each measurement cycle (for example, 30 minutes or 1 hour cycle) by the above equation (1). The difference between the result obtained by multiplying the accumulated electricity amount ΣPd, which is the amount of electric power, by the coefficient Kc and the result obtained by dividing the accumulated amount of discharge ΣPd by the coefficient Kd is obtained, and this difference is added to the initial electric energy Pint. The result of division is obtained as the remaining capacity SOC.

The home storage unit 156 stores a control table 145, a condition table 146, and a power consumption history table 147.
Next, FIG. 6 is a diagram illustrating a configuration example of the control table 145. FIG. 6 describes the settings of the switches SW1 to SW5 according to the state, which are determined by a distributor control unit 141 (to be described later) with reference to the condition table 146 using monitor data or the like.
With reference to the condition table 146, the distributor control unit 141 refers to the state SO1 being self-charged, the state SO2 being commercial charged, the state SO3 being reverse flow, the state SO4 being forced reverse flow, and the forced commercial charge. Determining whether or not the state is any one of a certain SO5, a discharging state SU1, a commercial power receiving state SU2, a commercial charging state SU3, a forced reverse power flow state SU4, and a forced commercial charging SU5 I do.
The condition table 146 describes the conditions for each state shown in FIG. When Pp ≧ (Pc + Ps), which is an excessive power state, it is defined as each state of the state SOn (1 ≦ n ≦ 5). When the power shortage state Pp <(Pc + Ps), the state SOq (1 ≦ q ≦ 5) Each state is defined. FIG. 7 is a diagram illustrating state transitions such as power generation and power storage in the in-home power distributor 12 according to the numerical value of the generated power Pp. The distributor control unit 141 controls each switch SW when the following state transition is performed. In FIG. 7, solid arrows indicate transitions between states based on request control based on request signals from the regional management server 2, and broken arrows indicate transitions between states based on determination processing by the distributor controller 141 in the home. Is shown.

Further, the determination criteria defined in the condition table 146 for each state are listed below.
State SO1: State where SOC is less than 1 and stored power Ps is equal to or greater than a preset stored power threshold. That is, it is set when the storage battery 13 is in a chargeable state. Here, regarding the operation of the storage battery 13, the operation may be performed in consideration of the life of the storage battery 13, for example, the upper limit of the SOC is 0.9 instead of the upper limit. That is, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 in the case of an excessive power state, and connects each switch SW of the in-home power distributor 12 to a power shortage state (SU1 to SU1). From SU5) to the state SO1. In addition, in response to a demand request signal that is a request signal for requesting processing for performing the demand of the regional management server 2, in the case of the above state, the distributor control unit 141 controls each switch SW of the residential power distributor 12, The connection of each switch SW of the home power distributor 12 is shifted from the state SO3 to the state SO1.
State SO2: Set when the SOC is less than 1, the stored power Ps is less than or equal to a preset numerical value, and the current time is nighttime when the power rate is low (charging cost is low). That is, in response to a demand request signal that is a request signal for requesting demand from the regional management server 2, in the above state, the distributor control unit 141 controls each switch SW of the in-house power distributor 12 to distribute the in-house power distribution. The connection of each switch SW of the vessel 12 is shifted from the state SO3 to the state SO2.
State SO3: State in which electric power is sold to the electric power company 3. It is set when the generated power Pp of the solar cell 11 is Pp ≧ (Pc + Ps), the SOC is 1, and the reverse flow consumer 1 controls the reverse flow. That is, when the storage amount of storage battery 13 reaches Pmax, distributor control unit 141 controls each switch SW of in-home power distributor 12 to connect each switch SW in in-home power distributor 12 from state SO1. Transition to state SO3.
State SO4: State in which electric power is sold to the electric power company 3. It is set when the SOC is greater than or equal to the supply threshold value and a power generation request signal is received from the regional management server 2 to perform reverse power flow. That is, in response to a power generation request signal that is a request signal for requesting a process of generating power from the regional management server 2, in the above state, the distributor control unit 141 controls each switch SW of the residential power distributor 12. Then, the connection of each switch SW of the home power distributor 12 is shifted from the state SO1 or SO2 to the state SO4.
State SO5: This is set when the SOC that can be charged by the storage battery 13 is less than 1, and is set when a storage request signal that is a request signal for requesting processing for storing power is received from the regional management server 2. That is, in response to the power storage request of the regional management server 2, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 and shifts the connection of each switch SW of the in-house power distributor 12 from the state SO1 to SO5. Let In this state SO5, the connection state of each switch (SW1 to SW4) of the in-home power distributor 12 is the same as the state SO2 in which the storage battery 13 is charged from commercial power.
In addition, the states SO1, SO2, SO3, SO4, and SO5 were in the power excess state (Pp ≧ Pc + Ps), but when the power shortage state (Pp <Pc + Ps), the setting is shifted to the state SU1 in the power shortage state. The

State SU1: State where the SOC is not 0 and the stored power Ps is greater than or equal to a preset numerical value. That is, the storage battery 13 is in a chargeable state, but the generated power of the solar battery 11 is an insufficient value (Pp <Pc) to supply the residential power supply line, and Pp falls below a preset power generation threshold. Set if not. That is, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 when the power is insufficient, and connects each switch SW of the in-house power distributor 12 to an overpowered state (SO1 to SO1). Transition from state SO5 to state SU1. Further, when the stored power Ps of the storage battery 13 exceeds a preset value, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 and connects each switch SW of the in-home power distributor 12. Is transferred from the state SU2 to the state SU1.
State SU2: Set when the SOC is less than 1, the stored power Ps is less than or equal to a preset stored power threshold, and the current time is not nighttime when the power rate is low (charge cost is low). That is, in response to a demand request signal that is a request signal for requesting processing for performing the demand of the regional management server 2, in the case of the above state, the distributor control unit 141 controls each switch SW of the residential power distributor 12, The connection of each switch SW of the home power distributor 12 is shifted from the state SU1 to the state SU2. Further, when the stored power Ps of the storage battery 13 falls below a preset numerical value, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 to connect each switch SW of the in-home power distributor 12. Is transferred from the state SU1 to the state SU2. Further, when the stored power Ps of the storage battery 13 exceeds a preset value, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 and connects each switch SW of the in-home power distributor 12. From state SU3 to state SU2.
State SU3: Set when the SOC is less than 1, the stored power Ps is equal to or less than a preset stored power threshold, and the current time is nighttime when the power rate is low (charge cost is low). That is, a demand request signal that is a request signal for requesting the demand of the regional management server 2 is received. In the above state, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 to The connection of each of the 12 switches SW is shifted from the state SU1 to the state SU3. Further, when the distributor control unit 141 detects that the stored power Ps of the storage battery 13 has a margin with respect to the maximum stored power and is in the nighttime power time zone, the distributor control unit 141 switches each switch SW of the in-home power distributor 12. By controlling, the connection of each switch SW of the in-home power distributor 12 is shifted from the state SU2 to the state SU3.
State SU4: A state in which electric power is sold to the electric power company 3. It is set when the SOC is equal to or greater than the supply threshold and a power generation request signal, which is a request signal for requesting processing for performing reverse power flow, is received from the regional management server 2. That is, in response to a power generation request from the regional management server 2, the distributor control unit 141 controls each switch SW of the in-home power distributor 12 to change the connection of each switch SW of the in-house power distributor 12 from the state SU2 or SU3. Move to SU4.
State SU5: This is set when the SOC that can be charged by the storage battery 13 is less than 1, and is set when a storage request signal that is a request signal for requesting a process of storing power from the regional management server 2 is received. That is, the transition from the state SU1 to the state SU5 is performed only when the power storage request signal is supplied from the area management server 2 as described above. In this state SU5, the connection state of each switch (SW1 to SW4) of the in-home power distributor 12 is the same as the state SU3 in which the storage battery 13 is charged from commercial power. At this time, distributor control unit 141 controls each switch SW of in-home power distributor 12 to shift the connection of each switch SW in in-home power distributor 12 from state SU1 or SU2 to state SU5.
Further, the distributor control unit 141 makes a transition from the state SU1, SU2, SU3 to the state SO1 when the power is excessive in the states SU1, SU2, and SU3, and when the power is insufficient in the states SO1, SO3, Transition from state SO1, SO3 to state SU1.
In addition, each of the states SU1, SU2, SU3, SU4, and SU5 was in a power shortage state (Pp <Pc + Ps). The

As described above, the distributor control unit 141 searches for conditions corresponding to the monitor data, the inexpensive nighttime time zone, the storage power threshold, the supply threshold, and the power generation threshold, and the corresponding conditions are set. The read state (SOn, SOq) is read, switch control corresponding to this state is read from the control table, and each of the switches SW1 to SW5 is controlled.
The weather forecast inquiry unit 143 accesses a weather forecast company server that distributes weather forecast data at regular intervals, and acquires weather forecast data (weather, temperature, etc.) in units of cycles. There are types of weather such as “sunny”, “cloudy”, “rain”, and “cloud cover”.
The home storage unit 144 stores the control table 145 and the condition table 146 and the power consumption history table 147 already described.
The power consumption history table 147 stores the past power consumption in the month, day of the week, and time zone for each weather.

Further, when the inquiry information for controlling the power storage process, the power receiving process and the reverse power flow process is supplied from the regional management server 2, the distributor control unit 141 receives the current remaining capacity SOC, the generated power Pp in the specified time zone, and Based on the used power Pc, a suppliable power Pu that is suppliable power and a suppliable time Tu that is a suppliable time are calculated (details will be described later).
Further, the distributor control unit 141 responds to the inquiry information supplied from the regional management server 2 with its own identification information, the calculated suppliable power Pu and the suppliable time Tu, and the current state and the original state. The changed state when operating upon accepting the request is output to the regional management server 2.

  Each of the determination criteria in the condition table and the state of the control table described above is an example, and each part of the home gateway 14 performs normal operation. As described below, a request signal (power generation request) from the regional management server 2 is provided. The technical idea of this embodiment is that the home gateway 14 changes the state of the distributor control unit 141 in response to a request for power generation, power storage, and demand from the power company 3 by a signal, a power storage request signal, and a demand request signal. It is.

Next, FIG. 5 is a block diagram illustrating a configuration example of the area management server 2. In FIG. 5, the regional management server 2 includes an inquiry unit 21, a totaling unit 22, a response unit 23, and a control unit 24.
Upon receiving a power generation request, a power storage request, and a demand request signal (a power generation request signal, a power storage request signal, a demand request signal) from the electric power company 3, the inquiry unit 21 responds to the group of reverse power flow consumers 1 that it manages. Inquiry signal (hereinafter referred to as inquiry) information requesting an answer as to whether or not reverse power flow processing, power storage processing and power reception processing can be performed is output.
The totaling unit 22 obtains the identification information, the suppliable power Pu and the suppliable time Tu, the original state and the changed state from the answer signal (hereinafter referred to as answer) from each reverse power flow consumer 1 in response to the inquiry. It is extracted and determined whether or not the original state and the changed state correspond to the combination of the states set in advance (the combination of the original state and the changed state). The reverse power flow consumer 1 having a combination of states that matches the combination of states is extracted. A plurality of combinations of this state are separately provided for each of the power generation request, the power storage request, and the demand request.
Further, the counting unit 22 performs reverse power flow in which the combination of the states matches according to the ranking rule set in accordance with the magnitude relationship among the combination of the state, the remaining capacity SOC, the suppliable power Pu, and the suppliable time Tu. Ranking of customer 1 is performed. Here, the totaling unit 22 may delete the reverse power flow consumer 1 having a supplyable time Tu less than the supply time set in advance from the rank.

  From the ranking result of the totaling unit 22, the control unit 24 responds to a request signal for requesting a power generation request, a power storage request, and a demand request until the requested power is the highest reverse current consumer 1 in the rank. Are added in order, for example, in the power generation request, the suppliable power Pu is added. At this time, the control unit 24 is ranked if the power supply Pu that can be supplied from all the ranked reverse flow consumers 1 does not satisfy the required power requested by the power company 3 by the request signal. The result obtained by adding the suppliable power Pu of all the reverse power flow consumers 1 is defined as the suppliable total power. Here, the control unit 24 sets the shortest supplyable time Tu of the ranked reverse power flow consumer 1 as the total supplyable time.

The answering unit 23 outputs either the power that can be supplied by the control unit 24 or the total power that can be supplied and the total supplyable time to the power company 3 as a response.
By replying to the power company 3 the total power that can be supplied as described above, the power company 3 can recognize that there is a risk in the power supply from the reverse flow consumer 1. . At this time, the electric power company 3 does not output additional request signals (power generation request, power storage request, and demand request request signals) to the regional management server 2 that has made a full response.
Then, the electric power company 3 newly outputs a request signal (a power generation request, a power storage request, and a demand request signal) to the area management server 2 that manages the group of other reverse flow consumer 1.

Next, when the electric power company 3 outputs a request signal (power generation request, power storage request, and demand request request signal) to the regional management server 2, the operation of each unit of the regional management server 2 and the reverse power consumer 1 Will be described.
<Power generation request>
The operation of the local power supply and demand control system in the power generation request will be described with reference to FIGS. FIG. 8 is a diagram illustrating an example of a control sequence in the power company 3, the regional management server 2, and the dwelling unit (reverse power flow consumer 1) in the power generation request. FIG. 9 is a table showing the ranking results of the reverse flow consumer 1 generated by the totaling unit 22 of the area management server 2. In FIG. 9, the ranking order corresponds to the original state, the state after change, the remaining capacity SOC, the amount of power generation (suppliable power Pu), and the duration time during which power can be supplied (suppliable time Tu). Although not shown in the figure, the identification information of each of the reverse power flow consumers 1 ranked is also associated.

Step S11:
When the power supply server of the power company 3 runs out of power supply in the power grid, the power management server 2 requests the regional management server 2 to generate a reverse power flow for the reverse power consumer 1 managed by the regional management server 2. The requested power, which is necessary power, and the time for supplying the requested power are added to the power generation request signal shown and output to the regional management server 2.

Step S12:
When receiving the power generation request signal from the power adjustment server of the electric power company 3, the inquiry unit 21 outputs inquiry information for inquiring about the ability for reverse power flow processing to all of the reverse power flow customers 1 managed by the inquiry unit 21.

Step S13:
The distributor control unit 141 acquires the weather forecast data from the server of the weather forecast company, and uses the power consumption Pd per unit time in the month, day of the week and time zone in the weather represented by the weather forecast data from the power consumption history table 147. The generated power Pp is read out, and is assumed to be the predicted used power Pd and the predicted generated power Pp.
Then, the distributor control unit 141 uses the current remaining capacity SOC, the predicted used power Pd, and the predicted generated power Pp to calculate the suppliable power Pu and the suppliable time Tu based on the following equation (2). It is calculated every preset unit time (for example, 30 minutes or 1 hour). The length of the unit time is set based on the current weather state (state such as weather and outside temperature) indicated by the weather information and the accuracy of the record of the actual power usage in the past weather state.
Pu = SOC * Pmax + Kc * Pp- (1 / Kd) * Pd (2)
For example, when the unit time is 1 hour, the distributor control unit 141 calculates the integrated value ΣPu every hour, and can supply the time from when the calculation is performed to the time when ΣPu becomes 0. Let Tu be. Accordingly, the distributor control unit 141 detects that ΣPu is positive up to 3 times when ΣPu is negative when ΣPu is negative when ΣP is added four times and the sum of the suppliable power Pu calculated per unit time is four times. Then, 1 hour × 3 is calculated, and the supplyable time Tu is determined as 3 hours.
In addition, when the unit time is 30 minutes, the distributor control unit 141, when ΣPu becomes negative at the third time, ΣPu is positive until the second time at the time of the previous unit time calculation. Calculation is made and the supplyable time Tu is determined as 1 hour (60 minutes).
Then, the distributor control unit 141 outputs the current remaining capacity SOC and the calculated suppliable power Pu and suppliable time Tu to the regional management server 2 as an answer (capability answer).
At this time, the distributor control unit 141 adds its own identification information, the current state, and the state after the change according to the power generation request to the answer. Here, when the current state is the state SO1 to SO3, the distributor control unit 141 performs the reverse power flow process, so that the changed state is set to the state SO4 according to the rule (control rule) of the condition table 146. On the other hand, when the current state is the state SU1 to SU3, the distributor control unit 141 performs the reverse power flow process, so that the changed state is set to the state SU4 according to the rule of the condition table 146. In the present embodiment, it is assumed that a plurality of requests are not made to the same regional management server 2, and when requested, each reverse power consumer 1 is in any one of the states SO1 to SO3 in the normal operation state and the states SU1 to SU3. It is in the state.

Step S14:
The totaling unit 22 compares the identification information of all the reverse power flow consumers 1 under the management stored in the internal storage unit in advance with the identification information of the reverse power flow customer 1 that has transmitted the answer, When it is detected that an answer is received from the reverse power flow consumer 1, the following aggregation process is performed.
And the total part 22 is for every reverse power flow consumer 1, the combination of the original state and the state after a change, the original state previously set corresponding to a power generation request | requirement, and the state after a change Are compared, and the reverse power flow consumer 1 of the matching combination is extracted. Here, the combination of the original state set in response to the power generation request and the changed state is [SO2, SO4] as [original state, changed state] as shown in FIG. ], [SO1, SO4], [SU2, SU4], [SU3, SU4].

Therefore, the totaling unit 22 sets the combinations [SO2, SO4], [SO1, [SO1, SO4] in which the combination of the original state and the changed state [original state, changed state] of each reverse flow consumer 1 is set. It is determined whether or not any of [SO4], [SU2, SU4], [SU3, SU4] is matched.
The totaling unit 22 then selects a combination [original state, changed state] that matches any of the set combinations [SO2, SO4], [SO1, SO4], [SU2, SU4], [SU3, SU4]. The reverse flow consumer 1 of [state] is extracted, and the extracted reverse flow consumer 1 is ranked.
For example, as a ranking rule (control rule),
Aa. When the request signal of the power adjustment server of the electric power company 3 is the power generation request signal, the generated power in the home of the reverse power flow consumer 1 is excessive (Pp ≧ Pc + Ps), and the commercial charging state in which the power storage facility is charged with commercial power (SO2)
Ab. When the request signal of the power adjustment server of the electric power company 3 is a power generation request signal, the generated power in the home of the reverse flow consumer 1 is excessive, and the storage battery 13 is charged with the generated power of the power generation facility (SO1) )in the case of,
Ac. When the request signal of the power adjustment server of the electric power company 3 is a power generation request signal, the commercial power receiving state (SU2) in which the generated power in the home of the reverse flow consumer 1 is insufficient (Pp <Pc + Ps) and the commercial power is received. )in the case of,
Ad. When the request signal of the power adjustment server of the electric power company 3 is a power generation request signal, the generated power in the home of the reverse flow consumer 1 is insufficient and is in a commercial charge state (SU3).
The order is Aa, Ab, Ac, and Ad. In the same case, the higher the generated power corresponding to the requested power, the higher the rank is defined.

Here, the totaling unit 22 ranks the extracted reverse flow consumer 1 in accordance with the ranking rules set inside. For example, as a ranking rule, the combinations [original state, changed state] are ranked in the order of [SO2, SO4], [SO1, SO4], [SU2, SU4], [SU3, SU4]. To do. Further, when this combination is the same, the rule is that the rank is assigned in the order of the remaining capacity SOC.
Therefore, the totaling unit 22 ranks the reverse flow consumer 1 according to the above-described rules, adds the suppliable power Pu and the suppliable time Tu, respectively, and generates the ranking table shown in FIG. Write to the storage and store. Although not shown, the totaling unit 22 writes and stores the identification information of the backflow consumer 1 in a ranking table corresponding to the rank of the backflow consumer 1.
Next, in the ranking table, the control unit 24 determines the ranks in order from the reverse power flow consumer 1 of the highest rank according to the identification information until the value of the requested power supplied as the power generation request of the request signal is reached. The electric power Pu that can be supplied from the reverse flow consumer 1 is integrated.
At this time, when the addition of the suppliable power Pu exceeds the requested power, the control unit 24 selects the reverse power flow consumer 1 of the suppliable power Pu added until the requested power is exceeded as the power supply source. On the other hand, the control unit 24 selects all ranked reverse power flow consumers 1 as the power supply source if the requested power is not exceeded even if the power supply Pu that can be supplied from all the ranked reverse power flow consumers 1 is added. To do. Here, the control unit 24 sets the shortest supplyable time Tu of the ranked reverse power flow consumer 1 as the total supplyable time. At this time, the control unit 24 writes and stores the identification information of the reverse flow consumer 1 selected as the power supply source in the internal storage unit.
Then, the answering unit 23 outputs either the power that can be supplied or the total power that can be supplied and the total time that can be supplied to the power adjustment server of the power company 3 as a response.

Step S15:
The power adjustment server of the electric power company 3 receives, as a response to the power generation request signal requesting the power generation request, from the regional management server 2, either the power supply is possible or the total power that can be supplied, and the total power supply time. Check power and time.
Then, the power adjustment server of the power company 3 (described as the power company 3 in the present embodiment) is a power control device of each selected reverse power consumer 1 (described as the reverse power consumer 1 in the present embodiment). To the regional management server 2, an acknowledgment signal instructing to start reverse power flow is output.

Step S16:
When the approval signal is supplied from the power adjustment server of the power company 3, the regional management server 2 individually reverses each of the reverse power consumers 1 (identified by the identification information) selected as the power supply source in step S14. A change request signal instructing to perform power flow processing (forced reverse power flow) is output. That is, in the regional management server 2, the control unit 24 reads the identification information of the reverse flow consumer 1 stored in the internal storage unit selected as the power supply source, and the reverse flow consumer 1 indicated by the identification information. For each, a change request signal instructing to perform reverse power flow processing (forced reverse power flow) is output.

Step S17:
When a change request signal instructing to perform forced reverse power flow is supplied from the regional management server 2, the distributor control unit 141 receives switch control information corresponding to the changed state transmitted from the control table 145. Reading and control of each switch SW in the in-home power distributor 12 are performed.
For example, when the state transitions to the state SO4, the distributor control unit 141 makes the common terminal 3 conductive with the terminal 1 in the switch SW1 based on the switch setting of the state SO4 in the control table 145 shown in FIG. The common terminal 3 is electrically connected to the terminal 1 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW4, and the common terminal 3 is connected to the terminal in the switch SW5. 1 and the conductive state. At this time, the distributor control unit 141 controls the DC / AC converter 124 to supply the power input from the terminal 124a to the commercial low voltage line from the terminal 124b. Further, the distributor control unit 141 controls the DC / DC converter 123 so that the electric power from the storage battery 13 input from the terminal 123a is output from the terminal 123b.
As a result, the in-home power distributor 12 uses the DC / AC converter 124 to convert the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 to the commercial voltage line. Reverse flow. At this time, the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 are supplied to the residential power supply line via the DC / AC converter 125. Is done.

Further, for example, when the state transitions to the state SU4, the distributor control unit 141 causes the common terminal 3 to be in conduction with the terminal 1 in the switch SW1, based on the switch setting of the state SO4 of the control table 145 illustrated in FIG. In the switch SW2, the common terminal 3 is brought into conduction with the terminal 1, in the switch SW3, the common terminal 3 is brought into conduction with the terminal 2, in the switch SW4, the common terminal 3 is brought into conduction with the terminal 2, and in the switch SW5, the common terminal 3 is brought into conduction. Is connected to the terminal 1. At this time, the distributor control unit 141 controls the DC / AC converter 124 to supply the power input from the terminal 124a to the commercial low voltage line from the terminal 124b. Further, the distributor control unit 141 controls the DC / DC converter 123 so that the electric power from the storage battery 13 input from the terminal 123a is output from the terminal 123b.
As a result, the in-home power distributor 12 uses the DC / AC converter 124 to convert the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 to the commercial voltage line. Against the reverse current. At this time, the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 are supplied to the residential power supply line via the DC / AC converter 125. Is done.

Next, after the control of each switch SW of the in-home power distributor 12 is completed, the distributor control unit 141 outputs an acknowledgment signal indicating the completion to the area management server 2.
As described above, in response to the power generation request signal indicating the power generation request output from the power adjustment server of the power company 3, the regional management server 2 controls the reverse power flow process for each reverse power consumer 1, thereby Company 3 can use the group of reverse power consumers 1 as if it were a power plant (virtual power plant).
Further, in step S14 described above, when the power adjustment server of the power company 3 requests a request time (time for supplying the requested power) together with the requested power, the request may be made by shifting the time.

<Storage request>
The operation of the local power supply and demand control system in the power storage request will be described with reference to FIGS. 10 and 11. FIG. 10 is a diagram illustrating an example of a control sequence in the power adjustment server, the regional management server 2 and the dwelling unit (reverse power flow consumer 1) of the power company 3 in the power storage request. FIG. 11 is a table showing the ranking results of the reverse flow consumer 1 generated by the totaling unit 22 of the area management server 2. In FIG. 11, the ranking order corresponds to the original state, the changed state, the remaining capacity SOC, the power generation amount (chargeable power Pst), and the duration (chargeable time Tst). The identification information of the reverse flow consumer 1 is also associated.

Step S21:
When the power adjustment server of the power company 3 predicts that the power supply in the future (several hours or the next day) will be insufficient due to the weather conditions, etc., the power management server 2 manages the regional management server 2 The regional management server 2 adds a required power that is a required power and a time for supplying the required power to a power storage request signal indicating a power storage request for storing power to the reverse flow consumer 1 Output to.

Step S22:
When receiving the power storage request signal indicating the power storage request from the power adjustment server of the electric power company 3, the inquiry unit 21 sends inquiry information for inquiring about the ability for the power storage processing to all of the reverse power flow customers 1 managed by the inquiry unit 21. Output.

Step S23:
The distributor control unit 141 acquires the weather forecast data from the weather forecast company, and reads out the power consumption history table 147 from the power consumption history table 147 and the used power Pd and generated power Pp per unit time in the month, day of the week, and time zone , The expected used power Pd and the predicted generated power Pp.
Then, the distributor control unit 141 uses the current remaining capacity SOC, the predicted used power Pd, and the predicted generated power Pp to calculate the chargeable power Pst and the chargeable time Tst based on the following equation (3). , And is calculated every preset unit time (for example, 30 minutes or 1 hour). The length of the unit time is set based on the current weather state (state such as weather and outside temperature) indicated by the weather information and the accuracy of the record of the actual power usage in the past weather state.
Pst = (1 / Kc). (1-SOC) .Pmax-Pp + Pd (3)
In addition, for example, when the unit time is 1 hour, the distributor control unit 141 calculates the integrated value ΣPst every hour and stores the time from when the calculation is performed to the time when ΣPst becomes 0. Let Tst. Accordingly, the distributor control unit 141 detects that ΣPst is positive up to 3 times when the cumulative number of ΣPsts, that is, the addition value of the chargeable power Pst calculated per unit time is 4 and ΣPst becomes negative. Then, 1 hour × 3 is calculated, and the chargeable time Tst is obtained as 3 hours.
In addition, when the unit time is 30 minutes, the distributor control unit 141, when ΣPst becomes negative at the third time, ΣPst is positive until the second time at the time of the previous unit time calculation. Calculation is made to determine that the chargeable time Tst is 1 hour (60 minutes).
Then, distributor control unit 141 outputs the current remaining capacity SOC and the calculated chargeable power Pst and chargeable time Tst to region management server 2 as an answer (capability answer).
At this time, the distributor control unit 141 adds its own identification information, the current state, and the state after the change according to the power storage request to the answer. Here, when the current state is from state SU1 to SU3, distributor control unit 141 sets the state after change to state SU5 according to the rules of condition table 146 in order to perform power storage processing. On the other hand, distributor controller 141 performs the storage process when the current state is from state SO1 to state SO3, and therefore sets the changed state to state SO5 according to the rules of condition table 146. In the present embodiment, it is assumed that a plurality of requests are not made to the same regional management server 2, and when requested, each reverse power consumer 1 is in any one of the states SO1 to SO3 in the normal operation state and the states SU1 to SU3. It is in the state.

Step S24:
The totaling unit 22 compares the identification information of all the reverse power flow consumers 1 under the management stored in the internal storage unit in advance with the identification information of the reverse power flow customer 1 that has transmitted the answer, When it is detected that an answer is received from the reverse power flow consumer 1, the following aggregation process is performed.
And total part 22 is for every reverse power consumer 1, combination of the original state and a state after change, and the original state and the state after change which were previously set up corresponding to a power storage demand inside Are compared, and the reverse power flow consumer 1 of the matching combination is extracted. Here, the combination of the original state set in response to the power storage request and the changed state is [SU1, SU5 as [original state, changed state] as shown in FIG. ], [SU2, SU5], [SO3, SO5], [SO1, SO5].

Therefore, the totaling unit 22 sets combinations [SU1, SU5], [SU2, and combinations of the original state and the changed state [original state, changed state] of each reverse flow consumer 1 It is determined whether or not any of SU5], [SO3, SO5], and [SO1, SO5] is satisfied.
The totaling unit 22 then selects a combination [original state, changed state] that matches any of the set combinations [SU1, SU5], [SU2, SU5], [SO3, SO5], and [SO1, SO5]. The reverse flow consumer 1 of [state] is extracted, and the extracted reverse flow consumer 1 is ranked.
For example, as a ranking rule:
Ba. When the request signal from the power adjustment server of the electric power company 3 is a power storage request signal, the generated power in the home of the reverse power flow consumer 1 is insufficient and the power storage equipment is being discharged (SU1).
Bb. When the request signal from the power adjustment server of the electric power company 3 is a power storage request signal, the generated power in the home of the reverse flow consumer 1 is insufficient and is in a commercial power receiving state (SU2).
Bc. When the request signal from the power adjustment server of the electric power company 3 is the power storage request signal, in the reverse power flow state (SO3) where the generated power in the home of the reverse power flow consumer 1 is excessive and the reverse power flow is performed,
Bd. When the request signal from the power adjustment server of the electric power company 3 is the power storage request signal, the generated power in the home of the reverse flow consumer 1 is excessive and self-charging (SO1).
Ba. Bb. Bc. The order is Bd, and in the same case, the definition is such that the rank becomes higher when the stored power corresponding to the requested power is larger.

Here, the totaling unit 22 ranks the extracted reverse flow consumer 1 in accordance with the ranking rules set inside. For example, as a ranking rule, the combinations [original state, changed state] are ranked in the order of [SU1, SU5], [SU2, SU5], [SO3, SO5], [SO1, SO5]. To do. Further, when this combination is the same, it is a rule that ranks are assigned in order of decreasing remaining capacity SOC (because the amount of power to be stored is large).
Therefore, the totaling unit 22 ranks the reverse flow consumer 1 according to the rules described above, adds the accumulable power Pst and the accumulable time Tst, respectively, and generates a ranking table shown in FIG. Write to the storage and store. Although not shown, the totaling unit 22 writes and stores the identification information of the backflow consumer 1 in a ranking table corresponding to the rank of the backflow consumer 1.
Next, in the ranking table, the control unit 24 reverses the reverse power flow of the lower rank in order from the reverse power consumer 1 of the highest rank according to the identification information until the numerical value of the requested power supplied as the power storage request is reached. The electric power Pst that can be stored by the customer 1 is integrated.
At this time, when the addition of the chargeable power Pst exceeds the required power, the control unit 24 selects the reverse power flow consumer 1 of the chargeable power Pst added until the request power is exceeded as the power storage destination. On the other hand, the control unit 24 selects all ranked reverse power flow consumers 1 as power storage destinations when the requested power is not exceeded even if the power storage potential Pst of all the reverse power flow consumers 1 ranked is added. To do. Here, the control unit 24 sets the shortest time of the chargeable time Tst of the ranked reverse flow consumer 1 as the total chargeable time. At this time, the control part 24 writes and memorize | stores the identification information of the reverse power consumer 1 selected as an electric power storage destination in an internal memory | storage part.
Then, the answering unit 23 outputs either the power that can be supplied or the total power that can be stored and the total time that can be stored to the power company 3 as a response.

Step S25:
The electric power company 3 confirms the electric power and the time when either the electric power can be stored or the total electric power that can be stored and the total electric power that can be stored are input from the regional management server 2 as an answer to the electric storage request.
Then, the electric power company 3 outputs to the regional management server 2 an acknowledgment signal that instructs each selected reverse power flow consumer 1 to start power storage.

Step S26:
When the approval signal is supplied from the electric power company 3, the regional management server 2 individually stores the power storage process (forced) for each of the reverse power consumers 1 (identified by the identification information) selected as the power storage source in step S14. A change request signal instructing to perform (commercial power storage) is output. That is, in the regional management server 2, the control unit 24 reads the identification information of the reverse flow consumer 1 stored in the internal storage unit selected as the power storage destination, and the reverse flow consumer 1 indicated by the identification information. A change request signal for instructing to perform the storage process individually is output to each.

Step S27:
When the change request signal is supplied from the regional management server 2, the distributor control unit 141 reads the switch control information corresponding to the changed state transmitted by itself from the control table 145, and The switch SW is controlled.
For example, when the state transitions to the state SU5, the distributor control unit 141 makes the common terminal 3 conductive with the terminal 1 in the switch SW1 based on the switch setting of the state SU5 of the control table 145 shown in FIG. The common terminal 3 is electrically connected to the terminal 1 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW4, and the common terminal 3 is connected to the terminal in the switch SW5. 1 and the conductive state. At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Further, the distributor control unit 141 controls the DC / DC converter 123 to output the power input from the terminal 123b to the storage battery 13 from the terminal 123a.
Thereby, the in-home power distributor 12 charges the storage battery 13 with the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122 and the commercial power from the commercial low-voltage line. At this time, the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 and the power input from the commercial constant pressure line are supplied to the residential power supply line via the DC / AC converter 125. Supplied.

Further, for example, when the state transitions to the state SO5, the distributor control unit 141 causes the common terminal 3 to be in conduction with the terminal 1 in the switch SW1, based on the switch setting of the state SO5 of the control table 145 illustrated in FIG. In the switch SW2, the common terminal 3 is brought into conduction with the terminal 1, in the switch SW3, the common terminal 3 is brought into conduction with the terminal 2, in the switch SW4, the common terminal 3 is brought into conduction with the terminal 2, and in the switch SW5, the common terminal 3 is brought into conduction. Is connected to the terminal 1. At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Further, the distributor control unit 141 controls the DC / DC converter 123 to output the power input from the terminal 123b to the storage battery 13 from the terminal 123a.
As a result, the in-home power distributor 12 uses the DC / AC converter 124 to convert the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 to the commercial voltage line. Against the reverse current. At this time, the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 and the discharged power Pd from the storage battery 13 are supplied to the residential power supply line via the DC / AC converter 125. Is done.

Next, after the control of each switch SW of the in-home power distributor 12 is completed, the distributor control unit 141 outputs an acknowledgment signal indicating the completion to the area management server 2.
As described above, when the regional management server 2 controls the power storage process for each reverse power consumer 1 in accordance with the power storage request signal indicating the power storage request of the power company 3, the power company 3 The group of the house 1 can be used as if it is a power storage station (virtual power storage station).
Further, in step S14 described above, when the power company 3 requests a request time (a time for supplying the requested power) together with the requested power, the request may be made by shifting the time.

<Demand request>
The operation of the regional power supply and demand control system in the demand request will be described with reference to FIGS. FIG. 12 is a diagram illustrating an example of a control sequence in the electric power company 3, the regional management server 2, and the dwelling unit (reverse power flow consumer 1) in the demand request. FIG. 13 is a table showing the ranking result of the reverse power consumer 1 generated by the totaling unit 22 of the area management server 2. In FIG. 13, the ranking order corresponds to the original state, the changed state, the remaining capacity SOC, the power generation amount (demandable power Pdemand), and the duration (demandable time Tdemand). The identification information of the reverse flow consumer 1 is also associated.

Step S31:
The electric power company 3 demands (consumes) electric power to the reverse flow consumer 1 managed by the regional management server 2 with respect to the regional management server 2 when the supply power in the power network is surplus due to the weather condition or the like. It is necessary to let For this reason, the power company 3 adds to the demand request signal indicating the demand request, the requested power, which is necessary power, and the time for supplying the requested power, and outputs the request power to the regional management server 2.

Step S32:
When the inquiry unit 21 receives a demand request signal indicating a demand request from the electric power company 3, the inquiry unit 21 outputs inquiry information for inquiring about the capacity for demand processing to all of the reverse power flow customers 1 managed by the inquiry unit 21.

Step S33:
The distributor control unit 141 acquires the weather forecast data from the server of the weather forecast company, and uses the power consumption Pd per unit time in the month, day of the week and time zone in the weather represented by the weather forecast data from the power consumption history table 147. The generated power Pp is read out, and is assumed to be the predicted used power Pd and the predicted generated power Pp.
Then, the distributor control unit 141 calculates the demandable power Pdemand and the demandable time Tdemand based on the following equation (4) using the current remaining capacity SOC, the predicted use power Pd, and the predicted generated power Pp. , And is calculated every preset unit time (for example, 30 minutes or 1 hour). The length of the unit time is set based on the current weather state (state such as weather and outside temperature) indicated by the weather information and the accuracy of the record of the actual power usage in the past weather state.
Ps = (1 / Kc). (1-SOC) .Pmax-Pp + Pd-Pt (4)
For example, when the unit time is 1 hour, the distributor control unit 141 calculates the integrated value ΣPdemand every hour, and the time from when the calculation is performed until the time when ΣPs becomes 0 is the demandable time. Let Ts. Accordingly, the distributor control unit 141 detects that ΣPs is positive up to three times when the sum of ΣPdemand is integrated, that is, when the sum of demandable power Pdemand calculated per unit time is four and ΣPdemand is negative. Then, 1 hour × 3 is calculated, and the chargeable time Tdemand is determined as 3 hours.
In addition, when the unit time is 30 minutes, the distributor control unit 141, when ΣPdemand becomes negative at the third time, ΣPs is positive until the second time at the calculation of the previous unit time, so 30 minutes × 2 The demandable time Tdemand is calculated as 1 hour (60 minutes).
Pt in the above equation (4) indicates the amount of power used per unit time of the time-shiftable load. This time-shiftable load indicates a load when the operation time of the home appliance or the operation time of the water heater is changed to a designated time zone. That is, when the demand request is supplied, since the power supply is excessive, a load is added and the demandable power Pdemand is increased. For example, it is conceivable to add loads such as “operate the washing and drying machine in the standby state” and “accelerate the operation time of the electric water heater for warming the bath water”. In this embodiment, the load that increases the power consumption by shifting (shifting) the operation time zone in response to the demand request is set as the time shiftable load Pt in this embodiment.
Then, the distributor control unit 141 outputs the current remaining capacity SOC, the calculated demandable power Pdemand and the demandable time Tdemand to the regional management server 2 as an answer (capability answer).
At this time, the distributor control unit 141 adds the identification information, the current state, and the state after the change according to the demand request to the answer. Here, when the current state is the state SU1, the distributor control unit 141 performs the demand process, so that the changed state is set to the state SU3 or SU2 according to the rule of the condition table 146. Further, when the current state is the state SO3, the distributor control unit 141 performs the demand process, and therefore sets the changed state to the state SO2 or SO1 according to the rule of the condition table 146.
That is, when the remaining capacity SOC is less than 1, the distributor control unit 141 performs a state transition to change the original state SU1 to the changed state SU3 according to the rule of the condition table 146, and the remaining capacity SOC is 1. In this case, a state transition is performed in which the original state SU1 is changed to the changed state SU2. Further, the distributor control unit 141 changes the original state SO3 when the remaining capacity SOC is less than 1 and the charging cost using the commercial power source is low (night power band) according to the rule of the condition table 146. The state transition to the subsequent state SU2 is performed, and when the remaining capacity SOC is less than 1 and the charging cost using the commercial power source is not cheap, the state transition from the state SO3 to the state SO1 is performed.

Step S34:
The totaling unit 22 compares the identification information of all the reverse power flow consumers 1 under the management stored in the internal storage unit in advance with the identification information of the reverse power flow customer 1 that has transmitted the answer, When it is detected that an answer is received from the reverse power flow consumer 1, the following aggregation process is performed.
And the total part 22 is for every reverse power flow consumer 1, the combination of the original state and the state after a change, and the original state and the state after a change which were previously set corresponding to a demand request | requirement inside. Are compared, and the reverse power flow consumer 1 of the matching combination is extracted. Here, the combination of the original state and the changed state set corresponding to the demand request inside is [SU1, SU3 as [original state, changed state] as shown in FIG. ], [SU1, SU2], [SO3, SO2], [SO3, SO1].

Therefore, the totaling unit 22 sets the combinations [SU1, SU3], [SU1, the combinations of the original state and the changed state [original state, changed state] of each reverse flow consumer 1 It is determined whether or not any of [SU2], [SO3, SO2], and [SO3, SO1] is satisfied.
Then, the totaling unit 22 selects the combination [original state, changed state] that matches any of the set combinations [SU1, SU3], [SU1, SU2], [SO3, SO2], [SO3, SO1]. The reverse flow consumer 1 in the state] is extracted, and the extracted reverse flow consumer 1 is ranked.
For example, as a ranking rule:
Ca. When the request signal of the electric power company 3 is the demand request signal, the generated power in the home of the reverse flow consumer 1 is insufficient, is in the discharging state (SU1), and the state after accepting the request is the commercial charge (SU3 )in the case of,
Cb. When the request signal of the electric power company 3 is a demand request signal, the generated power in the home of the reverse flow consumer 1 is insufficient and is in a discharging state (SU1), and the state after accepting the request is commercial power reception (SU2) in the case of,
Cc. When the request signal of the electric power company 3 is a demand request signal, the generated power in the home of the reverse flow consumer 1 is excessive, the reverse flow state (SO3), and the state after accepting the request is the commercial charge (SO2 )in the case of,
Cd. When the request signal of the electric power company 3 is the demand request signal, the generated power in the home of the reverse flow consumer 1 is excessive, is in the reverse flow state (SO3), and the state after accepting the request is self-charging (SO1 )in the case of,
In the order of Ca, Cb, Cc, and Cd, the definition that the rank becomes higher when the demand power corresponding to the requested power is larger is the same.

Here, the totaling unit 22 ranks the extracted reverse flow consumer 1 in accordance with the ranking rules set inside. For example, as a ranking rule, the combinations [original state, changed state] are ranked in the order of [SU1, SU3], [SU1, SU2], [SO3, SO2], [SO3, SO1]. To do. Moreover, when this combination is the same, it is a rule that a rank is attached in order of decreasing remaining capacity SOC (because the amount of power to be demanded is large).
Therefore, the totaling unit 22 ranks the reverse flow consumer 1 according to the rules described above, adds the demandable power Pdemand and the demandable time Tdemand, respectively, and generates the ranking table shown in FIG. Write to the storage and store. Although not shown, the totaling unit 22 writes and stores the identification information of the backflow consumer 1 in a ranking table corresponding to the rank of the backflow consumer 1.
Next, the control unit 24 determines the reverse power flow of the lower rank in order from the reverse power flow consumer 1 of the highest rank according to the identification information until the numerical value of the requested power supplied as the demand request is reached in the ranking table. The demandable power Pdemand of the customer 1 is integrated.
At this time, when the addition of the demandable power Pdemand exceeds the requested power, the control unit 24 selects the reverse power flow consumer 1 of the demandable power Pdemand added until the demanded power is exceeded as the power demand destination. On the other hand, if the requested power is not exceeded even if the demandable power Pdemand of all the ranked reverse flow consumers 1 is added, the control unit 24 selects all the ranked reverse flow consumers 1 as power demand destinations. To do. Here, the control unit 24 sets the shortest time in the demandable time Tdemand of the ranked reverse power flow consumer 1 as the total demandable time. At this time, the control part 24 writes and memorize | stores the identification information of the reverse power flow consumer 1 selected as an electric power demand destination in an internal memory | storage part.
Then, the answering unit 23 outputs either the power that can be supplied or the total demandable power and the total demandable time to the power company 3 as a reply.

Step S35:
The electric power company 3 confirms the electric power and the time when the demand for electric power is available or the total demandable power and the total demandable time are input from the regional management server 2 as a response to the demand request.
Then, the electric power company 3 outputs an acknowledgment signal for instructing each reverse power flow consumer 1 to start demand to the regional management server 2.

Step S36:
When the consent signal is supplied from the power company 3, the regional management server 2 individually selects each of the reverse power flow consumers 1 (identified by the identification information) selected as the power demand destination (power demand destination) in step S14. Output a change request signal instructing to perform demand processing (power consumption). That is, in the regional management server 2, the control unit 24 reads the identification information of the reverse flow consumer 1 stored in the internal storage unit selected as the power demand destination, and the reverse flow consumer 1 indicated by the identification information. A change request signal for instructing to perform demand processing individually is output to each.

Step S37:
When the change request signal is supplied from the regional management server 2, the distributor control unit 141 reads the switch control information corresponding to the changed state transmitted by itself from the control table 145, and The switch SW is controlled.
For example, when the state transitions to the state SU3, the distributor control unit 141 causes the common terminal 3 to be electrically connected to the terminal 1 in the switch SW1 based on the switch setting of the state SU3 in the control table 145 illustrated in FIG. The common terminal 3 is electrically connected to the terminal 1 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW3, the common terminal 3 is electrically connected to the terminal 2 in the switch SW4, and the common terminal 3 is connected to the terminal in the switch SW5. 1 and the conductive state.
At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Moreover, the divider | distributor control part 141 controls the DC / DC converter 123 so that the electric power input from the terminal 123b may be output with respect to the storage battery 13 from the terminal 123a.
Thereby, the in-home power distributor 12 charges the storage battery 13 with the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122 and the commercial power from the commercial low-voltage line. At this time, the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 and the power input from the commercial constant pressure line are supplied to the residential power supply line via the DC / AC converter 125. Supplied.

Further, for example, when the state transitions to the state SU2, the distributor control unit 141 makes the common terminal 3 conductive with the terminal 2 in the switch SW1, based on the switch setting of the state SU2 of the control table 145 shown in FIG. In the switch SW2, the common terminal 3 is brought into conduction with the terminal 2, in the switch SW3, the common terminal 3 is brought into conduction with the terminal 1, in the switch SW4, the common terminal 3 is brought into conduction with the terminal 1, and in the switch SW5, the common terminal 3 is brought into conduction. Is connected to the terminal 1.
At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Further, the distributor control unit 141 controls the DC / DC converter 123 to output the power input from the terminal 123b to the storage battery 13 from the terminal 123a.
As a result, the in-home power distributor 12 does not charge the storage battery 13 with the generated power Pp from the solar battery 11 and does not supply it to the in-home power supply line. The residential power distributor 12 supplies commercial power from the commercial low-voltage line directly to the residential power supply line.

Further, for example, when the state transitions to the state SO2, the distributor control unit 141 causes the common terminal 3 to be electrically connected to the terminal 1 in the switch SW1, based on the switch setting of the state SO2 of the control table 145 illustrated in FIG. In the switch SW2, the common terminal 3 is brought into conduction with the terminal 1, in the switch SW3, the common terminal 3 is brought into conduction with the terminal 2, in the switch SW4, the common terminal 3 is brought into conduction with the terminal 2, and in the switch SW5, the common terminal 3 is brought into conduction. Is connected to the terminal 1.
At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Further, the distributor control unit 141 controls the DC / DC converter 123 to output the power input from the terminal 123b to the storage battery 13 from the terminal 123a.
As a result, the residential power distributor 12 charges the storage battery 13 with the commercial power supplied from the commercial constant pressure line without using the generated power Pp obtained from the solar battery 11 via the DC / DC converter 122. At this time, the residential power distributor 12 supplies the commercial power supplied from the commercial constant pressure line to the residential power supply line via the DC / AC converter 124 and the DC / DC converter 125.

Further, for example, when the state transitions to the state SO1, the distributor control unit 141 causes the common terminal 3 to be in conduction with the terminal 2 in the switch SW1, based on the switch setting of the state SO1 of the control table 145 illustrated in FIG. In the switch SW2, the common terminal 3 is brought into conduction with the terminal 1, in the switch SW3, the common terminal 3 is brought into conduction with the terminal 2, in the switch SW4, the common terminal 3 is brought into conduction with the terminal 2, and in the switch SW5, the common terminal 3 is brought into conduction. Is connected to the terminal 2.
At this time, the distributor control unit 141 controls the DC / AC converter 124 to output the AC power of the commercial low voltage line input from the terminal 124b as DC power from the terminal 124a. Further, the distributor control unit 141 controls the DC / DC converter 123 to output the power input from the terminal 123b to the storage battery 13 from the terminal 123a.
Thereby, the residential power distributor 12 charges the storage battery 13 with the generated power Pp obtained from the solar cell 11 via the DC / DC converter 122 without using the commercial power supplied from the commercial constant pressure line. At this time, the in-home power distributor 12 supplies the generated power Pp generated by the solar cell 11 to the in-home power supply line via the DC / AC converter 125.

Next, after the control of each switch SW of the in-home power distributor 12 is completed, the distributor control unit 141 outputs an acknowledgment signal indicating the completion to the area management server 2.
As described above, the regional management server 2 controls important processes for each reverse flow consumer 1 in accordance with the demand request signal indicating the demand request of the electric power company 3, so that the electric power company 3 has the reverse flow demand. It becomes possible to use the group of the house 1 as a consumer (virtual consumer).
Further, in step S14 described above, when the power company 3 requests a request time (a time for supplying the requested power) together with the requested power, the request may be made by shifting the time.

As described above, since the progress of introduction of natural energy differs depending on the region and the form of the building, that is, for each backflow consumer 1, there are many patterns. It is too complex and difficult for the power plant to handle all the controls for efficient use of natural energy to accommodate all these patterns.
In addition, in order to perform efficient use control of natural energy, there are a communication technique and a power control technique as a technique to be introduced into the entire conventional technique. However, the control level varies depending on the processing content to be realized, and the cost also varies. Therefore, in order to determine the method, it involves all the social system versions, and it becomes very difficult to determine a control method for efficient use of natural energy.

For this reason, in the present embodiment, the regional management server 2 is under its control of request signals from the electric power company 3 (power generation request signal for power generation request, power generation request signal for power storage request and power generation request signal for demand request). The monitoring control of the backflow consumer 1 which is a consumer having power generation and storage facilities (having the solar battery 11 and the storage battery 13) is collectively received.
Thereby, according to this embodiment, since the regional management server 2 manages a plurality of backflow consumers 1 in a predetermined region, a plurality of backflow consumers 1 are provided via the regional management server 2. The power flow request, the power storage request, and the demand request can be made, and when viewed from the electric power company 3, the reverse power flow consumer 1 is controlled so that it can be seen as a virtual general customer and the power plant and the power storage plant. An accurate supply and demand balance for commercial constant pressure lines can be achieved without handling all the power generation and storage facilities placed in the consumer 1 and the complicated situation (state transition) that occurs for each environment.

  Also, a program for realizing the functions of the regional management server 2 or the home gateway 14 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Thus, the power generation and storage of the reverse flow consumer in the own management may be controlled, or the home power distributor of the reverse flow consumer may be managed. Here, the “computer system” includes 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, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. 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.

  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 design and the like within a scope not departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Reverse power flow consumer 2 ... Area management server 3 ... Electric power company 4 ... Conventional power network 5 ... Wide area network 11 ... Solar cell 12 ... In-home power distributor 13 ... Storage battery 14 ... Home gateway 21 ... Inquiry part 22 ... Total part 23 ... Answer unit 24 ... Control unit 141 ... Distributor control unit 142 ... Storage battery remaining capacity calculation unit 143 ... Weather forecast inquiry unit 144 ... Home storage unit 145 ... Control table 146 ... Condition table 147 ... Power consumption history table SW1, SW2, SW3 SW4 ... switch

Claims (5)

It is a regional power demand management system that controls the amount of power demand and the amount of power supplied by reverse power flow in power consumers in the region,
Power generation equipment using natural energy, power storage equipment for storing power, home power distributor for controlling power supply, power generation and reverse power flow in the home, and power sensors in the home power distributor A power control device provided in a reverse power flow consumer having power, a stored power of the power storage facility and a home gateway that detects power demand in the house and controls power supply in the house;
Request commercial power supply to the residential area in the area and the reverse power flow consumer in the area to request power generation according to the power supply status, power storage request to demand power storage and demand A server provided in the electric power company that outputs each request signal of a demand request control request;
In response to a request for control of the request signal from the electric power company, regional management that inquires all the reverse power consumers in the region about the power that can be reverse power, the power that can be stored, and the power that can be demanded Server and
In response to the inquiry, the home gateway obtains the power that can be reversely flowed, the power that can be stored, and the power that can be demanded based on the generated power, the stored power, and the demand power obtained by the power sensor. Output as an answer to the server,
The regional management server aggregates the answers from each of the reverse power flow consumers, and according to a preset selection rule, a processing control signal for instructing power generation processing, power storage processing, and demand processing corresponding to the control request And outputting power to the selected reverse power flow consumer.   The regional management server ranks the reverse power flow consumer according to the answer according to a preset ranking rule, and becomes the requested power in the control request from the power company in order from the highest rank. The power in the answer is added, and the reverse power consumer up to the rank that becomes the requested power is selected as the reverse power consumer that requests each process corresponding to the control request. 1. The regional power supply and demand control system according to 1. The ranking rule is
A. When the request from the power company is the power generation request,
Aa. In the case of a commercial charge state in which the generated power in the house is excessive and the power storage facility is charged with the commercial power,
Ab. In the case of a self-charging state where the generated power in the house is excessive and charging the power storage facility with the generated power of the power generation facility,
Ac. In the case of a commercial power receiving state where the generated power in the house is insufficient and the commercial power is being received,
Ad. When the generated power in the house is insufficient and is in a commercial charge state,
Aa, Ab, Ac, Ad in this order, and in the same case, the higher the generated power corresponding to the required power, the higher the rank, the definition,
B. When the request from the electric power company is the storage request,
Ba. In the discharging state where the generated power in the house is insufficient and the power storage facility is being discharged,
Bb. When the generated power in the house is insufficient and is in a commercial power receiving state,
Bc. In the case of a reverse power flow state where the generated power in the house is excessive and the reverse power flow is performed,
Bd. When the generated power in the house is excessive and the self-charging,
In the order of Ba, Bb, Bc, Bd, and in the same case, the higher the stored power corresponding to the requested power, the higher the rank, the definition,
C. When the demand of the electric power company is the demand request,
Ca. When the generated power in the house is insufficient, the discharging state, and the state after accepting the request is the commercial charging,
Cb. When the generated power in the house is insufficient, the discharging state, and the state after accepting the request is the commercial power reception,
Cc. When the generated power in the house is excessive, the reverse power flow state, and the state after accepting the request is the commercial charging,
Cd. When the generated power in the house is excessive, the reverse power flow state, and the state after accepting the request is the self-charging,
In the order of Ca, Cb, Cc, Cd, in the case of the same, it is a definition that the higher the power demand corresponding to the required power, the higher the rank,
The local power supply and demand control system according to claim 2, wherein: The in-home power distributor has a plurality of switches,
The home gateway controls a connection state between the power generation facility, the power storage facility, and a power supply line of the power company according to the conduction and non-conduction states of the switch, and the reverse power flow processing, the power storage processing, and the demand The local power supply and demand control system according to any one of claims 1 to 3, wherein each of the processes is controlled. The home gateway is
A home storage unit in which a control table in which a control rule of the switch for each state of the reverse power flow processing, the power storage processing, and the demand processing of the switch in the home power distributor is defined;
Based on the remaining capacity, the generated power obtained from the power sensor, the stored power, the discharged power, the state of the power consumed in the home, and the control from the regional management server, the control rule for each state is determined from the control table. A duplexer control unit for reading and controlling a switch in the in-house power distributor based on the control rule;
The storage battery remaining capacity calculation part which calculates | requires the remaining capacity in the said electrical storage equipment by integration | accumulation of the time unit of the electrical storage electric power and discharge electric power with respect to the said electrical storage equipment obtained from an electric power sensor is characterized by these. The regional power supply and demand control system according to any one of the above.

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