JP2017017779A - Power supply system and power supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a reduction in electricity fee when performing low voltage batch power reception.SOLUTION: The power supply system (90) is used in a complex customer facility that performs a low pressure collective power receiving contract with electric power less than the electric power required for the high pressure batch receiving contract. The power supply system (90) includes a bulk receiver board (2) which receives power from a grid (80), an upper meter device (1) for measuring power consumption by a complex customer facility, a distribution board (4) for supplying the electric power received by the bulk power receiving board (2) to a plurality of customer facility in the complex customer facility, and a distributed type power supply (3) capable of supplying power to a plurality of customer facility.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply system and a power supply method.

  2. Description of the Related Art Conventionally, a power distribution system in an apartment house that makes a high-voltage collective power reception contract and distributes the received power to each house is known (for example, Patent Documents 1 and 2).

JP 2002-118961 A Japanese Patent No. 3896648

  However, the high voltage receiving / transforming device requires a certain cost. In addition, since a high-voltage collective power receiving contract cannot be concluded in the first place unless it is a power contract with a capacity of a reference value (for example, 50 kW) or more, the high-voltage collective power receiving contract can be concluded only for apartment houses of a certain scale or larger. Even in a housing complex where a high-voltage collective power reception contract cannot be concluded, a low-voltage collective power receipt contract can be concluded, but it is not always possible to reduce electricity charges.

  An object of the present invention made in view of such circumstances is to provide an electric power supply system and an electric power supply method capable of realizing a reduction in an electricity bill when performing low-voltage collective power reception.

In order to solve the above-described problem, a power supply system according to an embodiment of the present invention includes:
A power supply system in a complex customer facility that makes a low-voltage collective power receiving contract with less than the power required for a high-voltage collective power receiving contract,
A collective power receiving panel that receives power from the grid;
A host meter device for measuring power consumption by the complex consumer facility;
A distribution board for supplying power received by the collective power receiving board to a plurality of customer facilities in the composite customer facility;
A distributed power source capable of supplying power to the plurality of customer facilities;
Have

Moreover, in order to solve the said subject, the power supply method which concerns on one Embodiment of this invention is the following.
A power supply method in a complex customer facility that makes a low-voltage collective power reception contract with less than the power required for a high-voltage collective power reception contract,
A first step of receiving power from the grid;
A second step of measuring power consumption by the complex customer facility;
A third step of supplying the power received in the first step to a plurality of customer facilities in the composite customer facility;
A fourth step of supplying power from the distributed power source to the plurality of customer facilities;
Have

  According to the power supply system and the power control method according to an embodiment of the present invention, it is possible to realize a reduction in electricity bill when performing low-voltage collective power reception.

It is a functional block diagram of the electric power supply system which concerns on embodiment of this invention. It is a figure which shows the mode of electric power consumption when the high-order control apparatus of FIG. 1 controls a storage battery. It is a flowchart which shows operation | movement of the electric power supply system of FIG.

  FIG. 1 is a functional block diagram of a power supply system 90 according to an embodiment of the present invention. Control lines and information transmission lines are indicated by broken lines, and power lines are indicated by solid lines. The power supply system 90 is connected to the system 80. The power supply system 90 has at least a high-order meter device 1, a collective power receiving board 2, a distributed power source 3, and a distribution board 4, and further includes a low-order meter device 5, a low-order control device 6, a load 7, a high-order control device 8, and a server. At least one of the devices 9 may be included. It should be noted that each function of the power supply system 90 will be described, but is not intended to exclude other functions of the power supply system 90.

  As shown in FIG. 1, the upper meter device 1, the collective power receiving board 2, the distributed power source 3, the distribution board 4, the lower meter device 5, the lower control device 6, the load 7 and the upper control device 8 are provided in the complex customer facility. It is done. As an alternative, the collective power receiving board 2 may have the upper meter device 1 and the distribution board 4 inside. Further, the upper meter device 1 may be provided outside the complex customer facility. The complex customer facility is a housing complex in this embodiment, and has a plurality of customer facilities (for example, 6 units in total, 3 units on the first floor and 3 units on the second floor) and common parts (for example, corridors, stairs, elevator halls). Have. The lower control device 6 is provided in each of the customer facilities and the common part, and the load 7 is also provided in each of the customer facilities and the common part.

  The power supply system 90 is provided by, for example, a power company (also referred to as a new power company or an apartment house management company). Since the complex customer facility in this embodiment is relatively small as an apartment house, it does not consume the power necessary for a high-voltage collective power receiving contract. For this reason, the complex customer facility cannot make a high-voltage collective power reception contract. Therefore, the complex customer facility makes a low-voltage collective power receiving contract with an electric power company with power less than the power required for the high-voltage collective power receiving contract (for example, 50 kW).

  The complex customer facility will conclude a low-voltage power receiving contract with a power company and a power sales contract for surplus power from solar power generation. In addition, the complex customer facility signs a power contract with each resident of the customer facility. In this way, the complex customer facility receives power from the power company and supplies the received power to the customer facility.

  The host meter device 1 is a meter device with verification, and measures the amount of power consumed by the complex customer facility. The host meter device 1 outputs the measured power consumption amount to the host control device 8 for calculation of an electricity bill. The meter device with verification is verified by the measurement method and is within the verification validity period. A smart meter may be used as the upper meter device 1.

  The collective power receiving panel 2 is connected to the host meter device 1 and receives power supply from the system 80 by low voltage collective power reception. The collective power receiving board 2 supplies the supplied power to the distribution board 4.

  The distributed power source 3 can supply power to a plurality of customer facilities. The distributed power source 3 includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a solar power generation device, and a wind power generation device. For this reason, it becomes possible to reduce an electricity bill by combining various types of distributed power sources. The storage battery can output independently, for example, can supply power to at least one of the customer facility and the common part during a power failure. The power generation device can supply the generated power to at least one of a storage battery, a customer facility, and a shared part.

  The distribution board 4 branches the power received by the collective power receiving board 2 during the interconnection operation to a plurality of branches, and supplies it to at least one of the common part and the customer facility. Moreover, the distribution board 4 branches the electric power supplied from the distributed power supply 3 to a plurality of branches and distributes it to the customer facility.

  The lower-level meter device 5 is, for example, a certification electric meter (child meter) with verification, and is connected to each customer facility. The lower-level meter device 5 connected to each customer facility measures the power consumption of each load 7 of the customer facility. The lower-level meter device 5 is connected to the distribution board 4 and is provided by a business operator inside or outside the customer facility. The lower meter device 5 is also connected to a shared part. The lower-level meter device 5 connected to the common part measures the power consumption of the load 7 in the common part. The lower meter device 5 may be a smart meter. The lower meter device 5 notifies the upper control device 8 of the measured power consumption.

  The lower control device 6 is, for example, a HEMS (Home Energy Management System). The processing executed by the lower-level control device 6 is executed by a control unit including a processor such as a CPU (Central Processing Unit) that executes a program that defines a control procedure, and the program is stored in the storage unit of the lower-level control device 6 or external storage. Stored on media. The lower-level control device 6 is provided in each of the customer facilities and at least one of the shared portions, and can control the power consumption of the load 7 of at least one of the corresponding customer facilities and the shared portions. When the lower control device 6 is requested by the upper control device 8 to suppress the power consumption in at least one of the customer facility and the common part, the lower control device 6 can control the load 7 to suppress the power consumption.

  The load 7 is a power load that consumes power, and is, for example, various electric products such as air conditioners, microwave ovens, refrigerators, televisions, and routers used by customer facilities. The load 7 may be a machine such as an air conditioner or a lighting fixture, a lighting facility, or the like. Among the loads 7, those in the shared part are devices that consume electric power in the shared part, such as lighting equipment and emergency equipment (for example, a fire alarm).

  The host control device 8 is, for example, a HEMS. The processing executed by the host control device 8 is executed by a control unit including a processor such as a CPU that executes a program defining a control procedure, and the program is stored in a storage unit of the host control device 8 or an external storage medium. . The host control device 8 is provided in a complex customer facility. As an alternative example, the host control device 8 may be provided in at least one of the server devices 9 inside and outside the complex customer facility. The upper control device 8 acquires the electric energy measured by the lower meter device 5 periodically (for example, once per hour) by communication, and outputs it to the server device 9. The host control device 8 monitors the operation state of the distributed power supply 3 and outputs the acquired operation log (power generation status of the power generation device, charge / discharge status of the storage battery, error information, etc.) to the server device 9.

  When acquiring the demand response signal, the upper control device 8 requests the lower control device 6 to suppress the power consumption by the plurality of customer facilities. For example, when the host control device 8 acquires a demand response signal, the host control device 8 determines the power consumption reduction amount of each of the plurality of customer facilities according to the current power consumption amount of each of the plurality of customer facilities, and The lower control device 6 may be requested to carry out the reduction as determined. Thereby, the business operator who manages each customer facility or compound customer facility among a plurality of customer facilities can obtain an incentive. The host control device 8 may similarly suppress the power consumption in the shared part.

  More specifically, the incentive can be obtained from the sender of the demand response received by the host control device 8. As the sender of the demand response, for example, an electric power company (electric power company), an electric power distribution company (electric power aggregator), or the like is assumed. The incentive from the sender is first given to the operator who manages the complex customer facility. And a provider distributes the incentive from a transmitter according to the contribution degree to the demand response of the consumer of a consumer facility. The business incentive given to the consumer may be different from the incentive given by the sender.

  When the host controller 8 obtains an instruction to suppress the output of power to the grid 80, the host controller 8 charges the storage battery with the surplus power of the power generator. For example, the host controller 8 has obtained the instruction from a power provider (electric power company), a power distribution company (power aggregator), a power transmission / distribution company, a specific scale electric power company (PPS: Power Producer and Supplier), etc. When charging the surplus power of the power generator to the storage battery. When a device other than the host control device 8 (for example, an output control device or a power conditioner) acquires the instruction, the device other than the host control device 8 transfers the instruction to the host control device 8. For this reason, it is possible not only to respond to the output suppression instruction but also to continue the power generation by the power generation device and charge the storage battery with surplus power for future discharge.

  The server device 9 is used by a business operator that manages a complex customer facility. The server device 9 may be a cloud server. The server device 9 acquires information such as the amount of power consumption from the host control device 8, and provides meter reading data management support, billing data creation support, energy creation / storage energy management, customer facility (for residents) electricity use Provides a visualization service (Web service) etc. When the server device 9 acquires error information from the host control device 8, the server device 9 notifies the monitoring staff who is the user of the server device 9 that an error has occurred by voice, lamp, image, video, telephone, mail, or the like.

  Further, when the server device 9 obtains notification from the host control device 8 that the storage battery has changed to the self-sustained output mode, the server device 9 determines that the breaker of the collective power receiving panel 2 has been turned off and notifies the monitoring staff of the warning information. Generally, it is difficult for a resident of a customer facility to turn on the breaker of the low-voltage power receiving panel. Therefore, the monitoring person who acquired the warning information rushes to the complex customer facility and turns on the breaker. As an alternative example, the server device 9 may determine that the breaker of the collective power receiving panel 2 has been turned off when communication with the host control device 8 is interrupted.

  Hereinafter, a configuration for realizing a reduction in electricity charges when performing low-voltage collective power reception will be described.

  As a first configuration, the power supply system 90 not only performs low-voltage collective power reception but also includes a distributed power source 3. A plurality of customer facilities share the distributed power source 3 and can receive power from the distributed power source 3 during a time period when the electricity rate is high, thereby reducing the amount of power purchased from the grid 80. Thereby, reduction of an electricity bill is realizable.

  As a second configuration, the contract capacity in the low-voltage collective power receiving contract is smaller than the total value of the breaker capacities of the customer facilities. For example, it is assumed that the number of customer facilities in the complex customer facility is six and the breaker capacity of each unit is 40A. When the breaker capacity of the common part is 50A, the total value of the breaker capacity of the entire complex customer facility is 40 × 6 + 50 = 290 (A). However, since it is unlikely that all the households will consume the maximum capacity at the same time, for example, a complex customer facility concludes a low-voltage collective power reception contract with a contract capacity of 240A. Thereby, reduction of an electricity bill is realizable.

  As a third configuration, each of a plurality of customer facilities does not conclude a house contract, but a complex customer facility concludes a low-voltage collective power reception contract, and the plurality of customer facilities receive power received by the low-voltage collective power receipt contract. Receive supply. Depending on the electricity company's rate plan, the electricity price per unit will become cheaper as the contracted capacity increases. For this reason, reduction of an electricity bill is realizable.

  As a fourth configuration, the host control device 8 acquires the value (unit: kWh) of the purchased power amount from the host meter device 1 and outputs it to the server device 9. The server device 9 that has acquired the value refers to the time-series pattern of the purchased electric energy, and selects a (lowest) low-voltage collective power rate plan suitable for the pattern. For example, since the power supply system 90 can receive power supply from the distributed power source 3 in the daytime, the amount of power purchased from the grid 80 in the daytime is relatively small. Therefore, it is possible to reduce the electricity bill by changing the billing plan and lowering the electricity bill at night. Therefore, the host controller 8 determines a rate plan with a low nighttime electricity rate. The host control device 8 outputs the determined rate plan to the server device 9. For this reason, the business operator using the server device 9 can determine which rate plan should be adopted. That is, selection, change, and determination of a charge plan may be performed by the host control device 8, the server device 9, or a business operator. The selection, change, and determination of the charge plan may be performed by an electric power company, an electric power distribution company, an electric power transmission / distribution company, a specific scale electric power company, or the like.

  As a fifth configuration, when the distributed power source 3 includes a storage battery, the host control device 8 controls the storage battery by switching the first mode and the second mode using the first mode as the normal mode as follows.

  As a first mode, the storage battery is charged when the unit price of electricity is lower than a predetermined reference value, and discharged when the unit price of electricity is higher than a predetermined reference value. The predetermined reference value can be set arbitrarily. For example, the predetermined reference value can be set so that the time when the electricity unit price is lower than the predetermined reference value is nighttime, and the time when the electricity unit price is higher than the predetermined reference value is daytime. As an alternative example, two reference values (first reference value and second reference value) may be set as the predetermined reference value. More specifically, as the first mode, the storage battery charges the power from the system 80 when the unit price of electricity is lower than the first reference value (for example, at night), and the second reference value whose unit price is equal to or higher than the first reference value. Discharge at higher temperatures (eg daytime). When the distributed power source 3 further includes a solar power generation device, the storage battery may charge the storage battery with surplus power from the solar power generation device in the daytime. In the daytime when the surplus power of the solar power generation apparatus is large, the power supply system 90 may sell the surplus power.

  As the second mode, the storage battery discharges the charged power so that the power consumption of the complex customer facility does not exceed the contract power of the low-voltage collective power reception contract. That is, when the power consumption increases and falls within the predetermined power from the contract power of the low-voltage collective power receiving contract, the storage battery discharges the charged power. For this reason, it is unlikely that the breaker is turned off. In the case of a contract that allows power purchase over contract power, the power supply system 90 can reduce the power purchase over contract power.

  The state of power consumption when the host controller 8 controls the storage battery in the first mode without the power consumption falling within the predetermined power from the contract power of the low-voltage collective power receiving contract (that is, without switching to the second mode) As shown in FIG. As shown in FIG. 2, the host control device 8 purchases power from the system 80 at night or early morning (from 0:00 to 7:00) to charge the storage battery, and the power generator is used in the next time zone (from 7:00 to 16:00). The generated power from the (solar power generation device) and the discharged power from the storage battery cover the power consumed by a plurality of customer facilities. Even if it is covered, surplus power is sold. In the subsequent time zone (16:00 to 24:00), the amount of power consumption exceeds the amount of power generation, but the host controller 8 discharges the storage battery to suppress the amount of power purchased from the system 80.

  With at least the five configurations described above, the electricity bill charged to each of the plurality of customer facilities does not exceed the electricity bill charged when each of the plurality of customer facilities individually contracts each house.

  The power supply system 90 has the following configuration in addition to the configuration for realizing a reduction in the electricity bill.

  First, the host control device 8 acquires the value of the maximum power purchase (unit: kW) or the maximum current (unit: A) from the host meter device 1 by communication and outputs the value to the server device 9. The server device 9 can update the power contract with the power company with a contract capacity obtained by adding a predetermined value to the acquired value. Even if the power consumption or the current consumption exceeds the maximum power purchase power or the maximum current, if the excess is within the predetermined value, the breaker is not turned off. That is, power supply from the system 80 is not cut off.

  Secondly, a plurality of customer facilities share a distributed power source 3. For this reason, the installation cost of the distributed power supply 3 per house becomes cheaper than the cost when installing the distributed power supply 3 in each house. Therefore, the installation cost can be reduced.

  FIG. 3 is a flowchart showing the operation of the power supply system 90.

  The power supply system 90 receives power supply from the system 80 in the collective power receiving panel 2 (step S1). The power supply system 90 measures the power consumption of the complex customer facility in the upper meter device 1 (step S2). The power supply system 90 supplies the power received in step S1 from the distribution board 4 to each of a plurality of customer facilities (step S3). The power supply system 90 supplies power from the distributed power source 3 to a plurality of customer facilities (step S4). The power supply system 90 measures the power consumption amount of each of the plurality of customer facilities in the lower-level meter device 5 (step S5). Since the power supply system 90 can appropriately perform step S2, step S4, and step S5, the order of these steps can be changed. Further, the power supply system 90 can perform step S4 at an arbitrary time. The arbitrary point in time is when the unit price of electricity such as daytime is high, or when the power consumption may exceed the contracted power of the low-voltage collective power receiving contract.

  In addition, the power supply system 90 may not perform step S4 and step S5 depending on the situation. For example, when it is not necessary to supply power from the distributed power source 3 to a plurality of customer facilities, the power supply system 90 does not have to perform step S5. That is, the power supply system 90 may supply power from the distributed power source 3 to a plurality of customer facilities as necessary.

  According to the present embodiment, the power supply system 90 is a system in a complex customer facility that makes a low-voltage collective power reception contract with power less than that required for a high-voltage collective power reception contract. The power supply system 90 includes a collective power receiving panel 2 that receives power supply from the grid 80, a host meter device 1 that measures the amount of power consumed by the complex consumer facility, and the power received by the collective power receiving panel 2 in the complex consumer facility. A distribution board 4 that supplies power to a plurality of customer facilities, and a distributed power source 3 that can supply power to the plurality of customer facilities. In other words, the complex customer facility not only performs low-voltage collective power reception but also has a distributed power source 3. The customer facility shares the distributed power source 3 and can reduce the amount of power purchased by receiving power supply from the distributed power source 3 during a time period when the electricity rate is high. Thereby, reduction of an electricity bill is realizable.

  In addition, considering that it is unlikely that all units will consume the maximum capacity at the same time, multi-use customer facilities will receive a low-voltage collective power receiving contract with a contract capacity that is smaller than the sum of the breaker capacity of all units and the breaker capacity of the common area. Can be tied. Or even if the total value of the breaker capacity of all the houses and the breaker capacity of the common part is a value required for the high-voltage collective power receiving contract, the complex customer facility can cover the power by the low-voltage collective power receiving contract. Thereby, reduction of an electricity bill is realizable.

  In addition, depending on the electricity company's rate plan, the electricity rate per unit becomes cheaper as the contracted capacity increases. According to the present embodiment, each of the customer facilities does not conclude each house contract, but the complex customer facility concludes a low-voltage collective power reception contract. As a result, each of the customer facilities will be allocated electricity charges according to the amount of power used from the operator of the complex customer facility, and made a low-voltage collective power reception contract rather than paying the electricity charge in each house contract One can realize a reduction in electricity charges at each customer facility.

  According to the present embodiment, the distributed power source 3 includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a solar power generation device, and a wind power generation device. For this reason, in order to realize reduction of the electricity bill, a technique combining various types of distributed power sources becomes possible.

  In addition, according to the present embodiment, the power supply system 90 is provided in the subordinate control device 6 provided in each of the plurality of customer facilities and the complex customer facility, or in the complex customer facility and in the complex customer facility. And a host control device 8 provided in at least one of the other server devices 9. For this reason, control regarding power consumption is possible for each customer facility.

  Further, according to the present embodiment, when the host control device 8 acquires a demand response signal, the host control device 8 requests the lower control device 6 to suppress power consumption by a plurality of customer facilities. For this reason, it is possible to control the amount of power consumption for each of a plurality of customer facilities and obtain an incentive corresponding to the demand response.

  Further, according to the present embodiment, when the host control device 8 acquires an instruction to suppress the output of power to the grid 80, the surplus power of the power generation device is charged in the storage battery. For this reason, not only can it respond | correspond to an output suppression instruction | indication, but it can continue the electric power generation by an electric power generating apparatus, and can make a storage battery charge surplus electric power for future discharge.

  In addition, according to the present embodiment, the power supply system 90 further includes the lower-level meter device 5 that measures the power consumption amount of each of the plurality of customer facilities, and the lower-level meter device 5 performs higher-level control on the measured power consumption amount. The device 8 is notified. For this reason, the high-order control apparatus 8 can provide a service to each consumer facility according to each power consumption of a consumer facility.

  Further, according to the present embodiment, the host controller 8 selects the lowest price plan from among the plurality of charge plans of the low-voltage collective power reception contract based on the power consumption measured by the host meter device 1, and combines demand The server device 9 of the business operator that manages the house facility is notified. For this reason, a business operator etc. can judge the cheapest plan, and can implement | achieve reduction of an electricity bill.

  According to this embodiment, the storage battery is charged when the electricity unit price is lower than the predetermined reference value, and is discharged when the electricity unit price is higher than the predetermined reference value. For this reason, it is possible to reduce the amount of power purchased from the grid 80 when the unit price of electricity is high, thereby realizing a reduction in the electricity bill.

  Further, according to the present embodiment, the storage battery discharges the charged power so that the power consumption of the entire complex customer facility does not exceed the contract power of the low-voltage collective power reception contract, and receives the power at the entire complex customer facility. Reduce the amount of power. For this reason, it can reduce that the power supply system 90 purchases electric power more than contract electric power because the power consumption of the whole composite consumer facility exceeds contract electric power.

  Further, according to the present embodiment, the electricity charge charged to each of the plurality of customer facilities does not exceed the electricity charge charged when each of the plurality of customer facilities individually makes a contract for each house. For this reason, the satisfaction of each resident of the customer facility can be increased, and the demand for the power supply system 90 can be increased.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, functions included in each member, each part, each step, and the like can be rearranged so as not to be logically contradictory. Also, when the present invention is implemented as a method invention, it is possible to combine or divide a plurality of parts or steps into one.

  In the above description, the complex customer facility does not consume the power necessary for the high-voltage collective power receiving contract, but the present invention is not limited to this. In other words, even if the complex customer facility consumes the power required for the high-voltage collective power reception contract (for example, the sum of the power of each house contract is the power required for the high-voltage collective power receiving contract), 3, power can be covered by a low-voltage collective power receiving contract. As a result, since the complex customer facility does not have to make a high-voltage collective power receiving contract, it is not necessary to install a cubicle type high-voltage power receiving facility, and the initial investment or the maintenance cost can be reduced.

  In the above description, the host control device 8 requests the lower control device 6 to suppress the power consumption when the host control device 8 receives a demand response signal. However, the upper control device 8 may request only the lower control device 6 in the shared portion without requesting the lower control device 6 in the customer facility. Such processing can be performed, for example, when the power consumption to be suppressed is smaller than a predetermined reference value. In this case, since the host control device 8 does not need to inquire of the customer whether or not to respond to the demand response, it can easily respond to the demand response.

  Further, the host control device 8 may selectively request only the lower control devices 6 in some customer facilities. Which customer facility is requested is determined by, for example, the current power consumption in the customer facility. It may be determined according to. When the host control device 8 can directly control the equipment in each customer facility, the host control device 8 directly controls the equipment in the customer facility without going through the lower control device 6 according to the demand response. May be. When the host controller 8 directly controls the device, the incentive given to the customer may be increased.

  Moreover, when using a fuel cell as a power generator, air conditioning using exhaust heat, steam, hot water, cold water, or the like may be supplied to each customer facility. As described above, the business operator of the complex customer facility collectively provides air conditioning or the like using exhaust heat, thereby reducing the electricity bill, the gas fee, and the water bill in each of the customer facility. As the fuel cell, a solid oxide fuel cell, a polymer electrolyte fuel cell, a phosphoric acid fuel cell, a biofuel cell, or the like can be used.

  In the above description, as shown in FIG. 1, the lower meter device 5 is connected to the shared portion and the lower control device 6 is provided in the shared portion, but it is not always necessary to provide them. When the lower meter device 5 is not connected to the shared portion and the lower control device 6 is not provided to the shared portion, the data of the lower meter device 5 connected to each of the customer facilities is obtained from the data of the higher meter device 1. By subtracting all the totals, it is possible to calculate the power consumption of the shared portion. The host control device 8 or the server device 9 can calculate the power consumption of the shared portion.

  In the above description, the host control device 8 selects the charge plan for the low-voltage collective power receiving contract based on the power consumption measured by the host meter device 1, but selects and determines based on the power consumption (kW). May be. Further, the storage battery is controlled based on the power consumption (kWh) so as not to exceed the contract amount of the low-voltage collective power reception contract, but may be controlled based on the power consumption (kW).

  In addition, when the control units of the upper control device 8 and the lower control device 6 according to the present invention are configured by a computer, a program describing the processing contents for realizing each function is stored in an internal or external storage unit of the computer. It can be realized by reading and executing this program by the central processing unit (CPU) of the computer. In addition, such a program can be distributed by selling, transferring, or lending a portable recording medium such as a DVD or a CD-ROM, and such a program is stored in a storage unit of a server on a network, for example. And the program can be distributed by transferring the program from the server to another computer via the network. In addition, a computer that executes such a program can temporarily store, for example, a program recorded on a portable recording medium or a program transferred from a server in its own storage unit. As another embodiment of the program, the computer may directly read the program from a portable recording medium and execute processing according to the program, and each time the program is transferred from the server to the computer. In addition, the processing according to the received program may be executed sequentially.

DESCRIPTION OF SYMBOLS 1 High-order meter apparatus 2 Collective power receiving board 3 Distributed power supply 4 Distribution board 5 Low-order meter apparatus 6 Low-order control apparatus 7 Load 8 High-order control apparatus 9 Server apparatus 80 System 90 Power supply system

Claims (11)

A power supply system in a complex customer facility that makes a low-voltage collective power receiving contract with less than the power required for a high-voltage collective power receiving contract,
A collective power receiving panel that receives power from the grid;
A host meter device for measuring power consumption by the complex consumer facility;
A distribution board for supplying power received by the collective power receiving board to a plurality of customer facilities in the composite customer facility;
A distributed power source capable of supplying power to the plurality of customer facilities;
Having a power supply system. The power supply system according to claim 1,
The distributed power source includes a storage battery and at least one of a fuel cell, a solar power generation device, and a power generation device including at least one of a wind power generation device. The power supply system according to claim 2,
A lower control device provided in each of the plurality of customer facilities;
A host controller provided in the complex customer facility, or provided in at least one server device inside the complex customer facility and outside the complex customer facility;
And a power supply system. The power supply system according to claim 3, wherein
When the host controller acquires a demand response signal, the host controller requests the host controller to suppress power consumption by the plurality of customer facilities. The power supply system according to claim 3 or 4,
The distributed power source includes the storage battery and the power generation device,
When the host controller acquires an instruction to suppress output of power to the grid, the power generation system causes the storage battery to charge surplus power to the storage battery. The power supply system according to any one of claims 3 to 5,
A lower meter device for measuring the power consumption of each of the plurality of customer facilities,
The low-order meter device notifies the high-order control device of the measured power consumption amount. The power supply system according to any one of claims 3 to 6,
The host controller selects a lowest price plan from a plurality of price plans of the low-voltage collective power reception contract based on the power consumption measured by the host meter device, and manages the complex consumer facility Power supply system that notifies the server device of the person. The power supply system according to any one of claims 2 to 7,
The storage battery is charged when a unit price of electricity is lower than a predetermined reference value, and is discharged when the unit price of electricity is higher than the predetermined reference value. The power supply system according to any one of claims 2 to 8,
The power storage system, wherein the storage battery discharges charged power so that power consumption of the complex customer facility does not exceed contract power of the low-voltage collective power reception contract. In the electric power supply system according to any one of claims 1 to 9,
The electric power supply system in which the electricity bill charged to each of the plurality of consumer facilities does not exceed the electricity bill charged when each of the plurality of consumer facilities individually makes a contract for each house. A power supply method in a complex customer facility that makes a low-voltage collective power reception contract with less than the power required for a high-voltage collective power reception contract,
A first step of receiving power from the grid;
A second step of measuring power consumption by the complex customer facility;
A third step of supplying the power received in the first step to a plurality of customer facilities in the composite customer facility;
A fourth step of supplying power from the distributed power source to the plurality of customer facilities;
A power supply method.

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