JP7113060B2 - Power supply system and power supply method - Google Patents

Description

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

2. Description of the Related Art Conventionally, there has been known a power distribution system in an apartment complex in which a high-voltage bulk power receiving contract is concluded and the received power is distributed to each house (for example, Patent Documents 1 and 2).

JP-A-2002-118961 Japanese Patent No. 3869648

However, high-voltage power receiving and transforming equipment requires a certain amount of cost. In addition, since a high-voltage bulk power supply contract cannot be concluded unless the power contract is for a capacity of a reference value (for example, 50 kW) or more, a high-voltage bulk power supply contract can only be concluded for collective housing of a certain size or larger. Although it is possible to conclude a low-voltage bulk power receiving contract even in collective housing that cannot conclude a high-voltage bulk power receiving contract, it is not always possible to realize a reduction in electricity charges.

SUMMARY OF THE INVENTION An object of the present invention, which has been made in view of such circumstances, is to provide a power supply system and a power supply method that can realize a reduction in electricity charges when performing low-voltage batch power reception.

In order to solve the above problems, a power supply system according to one embodiment of the present invention includes:
A business that manages a collective housing that receives low-voltage bulk power from the grid based on a low-voltage bulk power receiving contract that is less than the power required for the high-voltage bulk power receiving contract, and is different from a power company that concludes the low-voltage bulk power receiving contract. A power supply system in a single apartment building having a plurality of dwelling units and a common area where electricity charges are distributed from the person according to the amount of power used,
a high-level meter device that is directly connected to the system without passing through a cubicle-type high-voltage power receiving facility and measures the amount of power purchased from the system in the housing complex;
a first breaker connected to the system side ;
a low-voltage collective power receiving panel that receives power from the system via the host meter device without passing through the cubicle-type high-voltage power receiving equipment;
a plurality of second breakers connected respectively to the plurality of dwelling units and the common area ;
a branch point that supplies the power received by the low-voltage collective power receiving board to each of the plurality of dwelling units and the common area via the second breaker;
a plurality of subordinate meter devices connected between the branch point and the plurality of dwelling units for measuring power consumption of the plurality of dwelling units;
A distributed power supply including 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, between the upper meter device and the plurality of lower meter devices a distributed power source that is connected and capable of supplying power to the plurality of dwelling units and the common area;
has
The capacity of the first breaker is smaller than the total capacity of the second breakers.

Moreover, in order to solve the above problems, a power supply method according to an embodiment of the present invention includes:
A business that manages a collective housing that receives low-voltage bulk power from the grid based on a low-voltage bulk power receiving contract that is less than the power required for the high-voltage bulk power receiving contract, and is different from a power company that concludes the low-voltage bulk power receiving contract. A power supply method in a single collective housing having a plurality of dwelling units and a common area in which electricity charges are distributed according to the amount of power used by a person,
a first step of measuring the power consumption in an upper-level meter device that is directly connected to the system without passing through a cubicle-type high-voltage power receiving equipment and measures the power consumption purchased from the system in the collective housing;
a second step of receiving power supply from the system via a first breaker that is connected to the system side and cuts off power greater than the contracted capacity of the low-voltage bulk power receiving contract, without passing through the cubicle-type high-voltage power receiving equipment; ,
a third step of supplying the electric power received in the second step to each of the plurality of dwelling units and the common area via a plurality of second breakers connected to each of the plurality of dwelling units and the common area; ,
a fourth step of measuring the power consumption of the plurality of dwelling units in the plurality of subordinate meter devices for measuring the power consumption of the plurality of dwelling units;
from a distributed power supply including 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, via between the upper meter device and the plurality of lower meter devices and a fifth step of supplying power to the plurality of dwelling units and the common area,
The capacity of the first breaker is smaller than the total capacity of the second breakers.

According to the power supply system and the power control method according to one embodiment of the present invention, it is possible to reduce electricity charges when performing low-voltage batch power reception.

1 is a functional block diagram of a power supply system according to an embodiment of the invention; FIG. FIG. 2 is a diagram showing how power is consumed when the host controller of FIG. 1 controls a storage battery; 2 is a flow chart showing the operation of the power supply system of FIG. 1;

FIG. 1 is a functional block diagram of a power supply system 90 according to an embodiment of the invention. Control lines and information transmission lines are indicated by dashed lines, and power lines are indicated by solid lines. Power supply system 90 is connected to grid 80 . The power supply system 90 has at least a host meter device 1, a collective power receiving board 2, a distributed power source 3, and a distribution board 4, and further comprises a host meter device 5, a host controller 6, a load 7, a host controller 8, and a server. At least one of the devices 9 may be included. It should be noted that while each function of power supply system 90 is described, it is not intended to exclude other functions that power supply system 90 may have.

As shown in FIG. 1, a high-order meter device 1, a collective power receiving board 2, a distributed power supply 3, a distribution board 4, a low-order meter device 5, a low-order control device 6, a load 7 and a high-order control device 8 are installed in a complex consumer facility. be done. As an alternative example, collective power receiving board 2 may have host meter device 1 and distribution board 4 inside. Further, the high-level meter device 1 may be provided outside the complex consumer facility. In this embodiment, the complex consumer facility is an apartment complex that includes a plurality of consumer facilities (for example, 3 units on the first floor and 3 units on the second floor, for a total of 6 units) and common areas (such as corridors, stairs, and elevator halls). have. Subordinate controllers 6 are provided in each of the customer facilities and in common areas, and loads 7 are also provided in each of the customer facilities and in common areas.

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

The complex consumer facility concludes a low-voltage bulk power receiving contract with an electric power company, and also concludes a power selling contract for surplus power generated by photovoltaic power generation. Also, the complex consumer facility concludes an electric power contract with each resident of the consumer facility. In this manner, the complex consumer facility receives power from the electric power company and supplies the received power to the consumer facility.

The upper-level meter device 1 is a meter device with certification, and measures power consumption by a complex consumer facility. The host meter device 1 outputs the measured power consumption to the host control device 8 for purposes such as calculation of electricity bills. Certified meter devices are certified according to the Measurement Law and are within the validity period of the certification. A smart meter may also be used as the host meter device 1 .

The collective power receiving board 2 is connected to the host meter device 1 and receives power from the system 80 by low voltage collective power receiving. 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 consumer 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. Therefore, it is possible to combine various types of distributed power sources to reduce electricity charges. The storage battery is capable of independent output, and can supply electric power to at least one of consumer facilities and common areas during a power outage, for example. The power generation device can supply generated power to at least one of the storage battery, the consumer facility, and the common area.

The power distribution board 4 branches the power received by the collective power receiving board 2 during interconnected operation to a plurality of branch trunks, and supplies the branch power to at least one of common parts and consumer facilities. Also, the distribution board 4 branches the power supplied from the distributed power source 3 to a plurality of branch trunks and distributes the branched power to consumer facilities.

The subordinate meter device 5 is, for example, a certification electric meter (child meter) with certification, and is connected to each of the customer facilities. A subordinate meter device 5 connected to each of the customer facilities measures the power consumption of each load 7 of the customer facilities. The subordinate meter device 5 is connected to the distribution board 4 and provided by the operator inside or outside the customer's facility. In addition, the subordinate meter device 5 is also connected to a common portion. A low-order meter device 5 connected to the shared portion measures the power consumption of the load 7 of the shared portion. The subordinate meter device 5 may be a smart meter. The low-order meter device 5 notifies the high-order control device 8 of the measured power consumption.

The subordinate control device 6 is, for example, HEMS (Home Energy Management System). The processing executed by the lower 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 the control procedure, and the program is stored in the storage unit of the lower control device 6 or an external storage. Stored on media. The subordinate control device 6 is provided in each customer facility and at least one of the common area, and can control the power consumption of the corresponding load 7 of at least one of the customer facility and the common area. When receiving a request from the upper control device 8 to reduce the power consumption in at least one of the consumer facility and the common area, the lower control device 6 can control the load 7 to reduce the power consumption.

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

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

When the host controller 8 acquires the demand response signal, the host controller 8 requests the lower controller 6 to suppress power consumption by the plurality of consumer facilities. For example, when the host controller 8 acquires a demand response signal, it determines the power consumption reduction amount of each of the plurality of consumer facilities according to the current power consumption of each of the plurality of consumer facilities. Subordinate controller 6 may be requested to implement the reduction as determined. As a result, business operators managing individual customer facilities or multiple customer facilities among a plurality of customer facilities can obtain incentives. The host control device 8 may similarly suppress the power consumption in the shared portion.

More specifically, the incentive can be obtained from the sender of the demand response received by the host controller 8 . The sender of the demand response is assumed to be, for example, an electric power company (electric power company), an electric power distributor (electric power aggregator), or the like. Incentives from senders are given first to operators managing complex customer facilities. Then, the business distributes the incentives from the sender according to the degree of contribution to the demand response of the consumers in the consumer facilities. Incentives provided by businesses to consumers may differ from incentives provided by senders.

When the host controller 8 receives an instruction to suppress the power output to the system 80, the host controller 8 causes the storage battery to be charged with the surplus power of the power generator. For example, the host controller 8 obtains the instruction from an electric power company (power company), power distribution company (power aggregator), power transmission/distribution company, power producer and supplier (PPS), etc. At this time, the storage battery is charged with the surplus power of the power generation device. When a device other than the host controller 8 (for example, an output control device, a power conditioner) acquires the instruction, the device other than the host controller 8 transfers the instruction to the host controller 8 . Therefore, it is possible not only to respond to the output suppression instruction, but also to continue 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 who manages complex consumer facilities. The server device 9 may be a cloud server. The server device 9 acquires information such as power consumption from the host control device 8, and provides meter reading data management support, fee billing data creation support, energy creation/storage facility management, and electricity usage for consumer facilities (for residents). Quantity visualization service (Web service), etc. will be provided. When the server device 9 acquires the error information from the host controller 8, the server device 9 notifies the observer, who is the user of the server device 9, that an error has occurred by voice, lamp, image, video, telephone, e-mail, or the like.

Further, when the server device 9 acquires the notification that the storage battery has changed to the self-sustaining output mode from the host control device 8, it determines that the breaker of the collective power receiving panel 2 has been turned off, and notifies the observer of warning information. In general, it is difficult for a resident of a consumer facility to turn on the breaker of the low-voltage collective power receiving board. Therefore, the monitor who has obtained the warning information rushes to the complex consumer facility and turns on the breaker. As an alternative example, the server device 9 may determine that the breaker of the collective power receiving board 2 has been turned off when communication with the host control device 8 is cut off.

A configuration for realizing a reduction in electricity charges when performing low-voltage batch power reception will be described below.

As a first configuration, the power supply system 90 not only performs low-voltage bulk power reception but also has distributed power sources 3 . A plurality of consumer facilities can share the distributed power source 3 and receive power from the distributed power source 3 during times when electricity rates are high, thereby reducing the amount of power purchased from the system 80 . This makes it possible to reduce the electricity bill.

As a second configuration, the contract capacity in the low-voltage bulk power receiving contract is smaller than the total value of the respective breaker capacities of the customer facilities. For example, it is assumed that the number of customer facilities in a complex customer facility is 6 and the breaker capacity of each house is 40A. Assuming that the breaker capacity of the shared portion is 50A, the total value of the breaker capacity of the entire complex consumer facility is 40×6+50=290 (A). However, since it is unlikely that all households will consume the maximum capacity at the same time, for example, a complex consumer facility concludes a low-voltage bulk power receiving contract with a contract capacity of 240A. This makes it possible to reduce the electricity bill.

As a third configuration, multiple consumer facilities do not each conclude a contract for each house, but a complex consumer facility concludes a low-voltage bulk power receiving contract, and multiple consumer facilities receive power under the low-voltage bulk power receiving contract. receive supply. Depending on the rate plan of the electric power company, the electricity rate per household decreases as the contract capacity increases. Therefore, it is possible to realize a reduction in electricity charges.

As a fourth configuration, the host controller 8 acquires the value of the purchased power amount (unit: kWh) 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 amount of power purchased, and selects the (cheapest) low-voltage bulk power reception rate plan that is suitable for the pattern. For example, since the power supply system 90 can receive power from the distributed power source 3 during the daytime, the amount of power purchased from the system 80 during the daytime is relatively small. Therefore, it is possible to reduce the electricity bill by changing the tariff plan and lowering the nighttime electricity bill. Therefore, the host controller 8 determines a price plan with a low nighttime electricity price. The upper control device 8 outputs the determined price plan to the server device 9 . Therefore, the business operator using the server device 9 can determine which rate plan should be adopted. Namely, the selection, change and determination of the charge plan may be performed by the host controller 8, the server device 9 or the business operator. The selection, change, and determination of rate plans may be performed by an electric power company, an electric power distribution company, an electric power transmission/distribution company, or a specified-scale electric power company.

As a fifth configuration, when the distributed power supply 3 includes a storage battery, the host controller 8 controls the storage battery by switching between the first mode and the second mode with the first mode as the normal mode as follows.

In the 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 the predetermined reference value. The predetermined reference value can be set arbitrarily. For example, the predetermined reference value can be set so that nighttime is when the unit price of electricity is lower than the predetermined reference value, and daytime is when the unit price of electricity is higher than the predetermined reference value. Alternatively, two reference values (a first reference value and a second reference value) may be set as predetermined reference values. More specifically, in the first mode, the storage battery is charged with power from the system 80 when the electricity unit price is lower than the first reference value (for example, at night), and when the electricity unit price is equal to or higher than the first reference value, the second reference value. Discharge at higher times (e.g. daytime). When the distributed power supply 3 further includes a photovoltaic power generation device, the storage battery may be charged with surplus power of the photovoltaic power generation device during the daytime. The power supply system 90 may sell the surplus power during the daytime when there is a lot of surplus power from the photovoltaic power generation device.

As a second mode, the storage battery discharges the charged power so that the power consumption of the complex consumer facility does not exceed the contracted power of the low-voltage bulk power receiving contract. That is, when the power consumption increases and becomes within a predetermined power from the contracted power of the low-voltage bulk power receiving contract, the storage battery discharges the charged power. Therefore, it is unlikely that the breaker will be turned off. In the case of a contract that allows purchase of power exceeding the contracted power, it is possible to reduce the power supply system 90 from purchasing power exceeding the contracted 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 bulk power receiving contract (that is, without the need to switch to the second mode). Shown in FIG. As shown in FIG. 2, the host controller 8 purchases power from the system 80 at night or early in the morning (0:00 to 7:00) to charge the storage battery, and in the next time period (7:00 to 16:00), the power generator Electric power generated from the (solar power generation device) and discharged electric power from the storage battery cover power consumption by a plurality of consumer facilities. The surplus power that remains even after the supply is covered is sold. In the subsequent time period (16:00 to 24:00), the power consumption exceeds the power generation, but the host controller 8 discharges the storage battery to suppress the power purchase from the system 80 .

According to at least the above five configurations, the electricity bill charged to each of the plurality of consumer facilities does not exceed the electricity bill billed when each of the plurality of consumer facilities individually contracts for each house.

The power supply system 90 has the following configuration in addition to the configuration for achieving reduction in electricity charges.

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

Secondly, multiple consumer facilities share the distributed power source 3 . Therefore, the cost of installing the distributed power source 3 per household is lower than the cost of installing the distributed power source 3 in each household. Therefore, installation costs can be reduced.

FIG. 3 is a flow chart showing the operation of the power supply system 90. As shown in FIG.

The power supply system 90 receives power supply from the system 80 at the collective power receiving board 2 (step S1). The power supply system 90 measures the power consumption of the complex consumer facility in the host 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 the plurality of consumer facilities (step S3). The power supply system 90 supplies power from the distributed power source 3 to a plurality of consumer facilities (step S4). The power supply system 90 measures the power consumption of each of the plurality of consumer facilities in the subordinate meter device 5 (step S5). Since the power supply system 90 can appropriately perform steps S2, S4 and S5, the order of these steps can be changed. Also, the power supply system 90 can perform step S4 at any time. The arbitrary point in time is, for example, when the unit price of electricity is high, such as during the daytime, or when there is a possibility that the power consumption will exceed the contracted power of the low-voltage bulk power receiving contract.

Power supply system 90 may not perform steps S4 and S5 depending on the situation. For example, when power supply from distributed power supply 3 to a plurality of consumer facilities is unnecessary, power supply system 90 does not need to perform step S5. That is, the power supply system 90 may supply power from the distributed power source 3 to a plurality of consumer facilities as needed.

According to the present embodiment, the power supply system 90 is a system in a complex consumer facility that concludes a low-voltage bulk power receiving contract with power less than that required for a high-voltage bulk power receiving contract. A power supply system 90 includes a collective power receiving board 2 that receives power from a grid 80, a host meter device 1 that measures the amount of power consumed by the complex consumer facility, and a system that supplies the power received by the collective power receiving board 2 to the complex consumer facility. It has a distribution board 4 that supplies electric power to a plurality of customer facilities inside, and a distributed power supply 3 capable of supplying electric power to a plurality of customer facilities. That is, the complex consumer facility not only receives low-voltage collective power but also has distributed power sources 3 . The customer facilities share the distributed power source 3 and receive power from the distributed power source 3 during times when the electricity rate is high, thereby reducing the amount of purchased power. This makes it possible to reduce the electricity bill.

In addition, considering that it is unlikely that all units will consume the maximum capacity at the same time, complex consumer facilities should conclude a low-voltage bulk power supply contract with a contract capacity that is smaller than the sum of the breaker capacity of all units and the breaker capacity of common areas. can tie. Alternatively, even if the total value of the breaker capacity of all households and the breaker capacity of common areas is the required value for the high voltage bulk power receiving contract, the complex consumer facility can cover power with the low voltage bulk power receiving contract. This makes it possible to reduce the electricity bill.

Also, depending on the rate plan of the power company, the electricity rate per household decreases as the contracted capacity increases. According to this embodiment, each customer facility does not conclude a contract for each house, but a complex customer facility concludes a low-voltage collective power receiving contract. As a result, each customer facility will be allocated electricity charges according to the amount of electricity used by the operator of the complex customer facility, and a low-voltage bulk power supply contract will be made rather than paying the electricity charges with each household contract. This makes it possible to reduce the electricity charges at each consumer's facility.

Further, according to this 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. Therefore, in order to reduce electricity charges, it is possible to combine various types of distributed power sources.

Further, according to the present embodiment, the power supply system 90 includes the low-level controllers 6 provided in each of a plurality of consumer facilities, and the power supply system 90 provided in the complex customer facility, or in the complex customer facility and in the complex customer facility. and an upper control device 8 provided in at least one of the external server devices 9 . Therefore, it is possible to control power consumption for each consumer facility.

Further, according to the present embodiment, when the host controller 8 acquires a demand response signal, the host controller 8 requests the lower controller 6 to suppress power consumption by a plurality of consumer facilities. Therefore, power consumption can be controlled for each of a plurality of consumer facilities, and incentives can be obtained in response to 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, it causes the storage battery to be charged with the surplus power of the power generation device. Therefore, it is possible not only to respond to an output suppression instruction, but also to continue power generation by the power generation device and charge the storage battery with surplus power for future discharge.

Further, according to the present embodiment, the power supply system 90 further includes a subordinate meter device 5 that measures the power consumption of each of a plurality of consumer facilities, and the subordinate meter device 5 controls the measured power consumption. Notify the device 8. Therefore, the host controller 8 can provide services to each of the customer facilities according to the power consumption of each of the customer facilities.

Further, according to the present embodiment, the host controller 8 selects the cheapest rate plan among a plurality of rate plans of the low-voltage bulk power receiving contract based on the power consumption measured by the host meter device 1, and The information is sent to the server device 9 of the business operator that manages the home facility. As a result, business operators can determine the cheapest plan, thereby realizing a reduction in electricity bills.

Further, according to this embodiment, the storage battery is charged when the unit price of electricity is lower than the predetermined reference value, and discharged when the unit price of electricity is higher than the predetermined reference value. Therefore, it is possible to reduce the amount of power purchased from the system 80 when the unit price of electricity is high, thereby realizing a reduction in electricity charges.

Further, according to this embodiment, the storage battery discharges the charged power so that the power consumption of the entire complex consumer facility does not exceed the contracted power of the low-voltage bulk power receiving contract, and the power is received by the entire complex consumer facility. Reduce power consumption. Therefore, it is possible to prevent the power supply system 90 from purchasing more power than the contracted power due to the power consumption of the entire complex consumer facility exceeding the contracted power.

Further, according to the present embodiment, the electricity bill charged to each of the plurality of consumer facilities does not exceed the electricity bill billed when each of the plurality of consumer facilities individually contracts for each house. Therefore, it is possible to increase the satisfaction level of each resident of the consumer facility and increase the demand for the power supply system 90 .

Although the present invention has been described with reference to the drawings and examples, it should be noted that various variations and modifications will be readily apparent to those skilled in the art based on this disclosure. Therefore, please note that these variations and modifications are included in the scope of the present invention. For example, the functions included in each member, each part, each step, etc. can be rearranged so as not to be logically inconsistent. Also, when implementing the present invention as a method invention, a plurality of parts, steps, etc. can be combined into one or divided.

In the above description, the case where the complex consumer facility does not consume the power required for the high voltage bulk power receiving contract is described, but the present invention is not limited to this. In other words, even if the complex consumer facility consumes the power required for the high voltage bulk power receiving contract (for example, when the sum of the power for each household contract is the power required for the high voltage bulk power receiving contract), the distributed power supply 3, electricity can be covered by a low-voltage lump-sum contract. As a result, the complex consumer facility does not need to enter into a high-voltage bulk power receiving contract, thereby eliminating the need to install a cubicle-type high-voltage power receiving facility, thereby reducing initial investment or maintenance costs.

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

Also, the host controller 8 may selectively request only the lower controllers 6 in some of the customer facilities. should be decided accordingly. When the host controller 8 can directly control the equipment in each customer facility, the host controller 8 directly controls the equipment in the customer facility without going through the lower controller 6 according to the demand response. may The incentive given to the consumer may be increased when the host controller 8 directly controls the equipment.

Further, when a fuel cell is used as a power generation device, air conditioning, steam, hot water, cold water, etc. using exhaust heat may be supplied to each of the consumer facilities. In this way, by collectively providing air-conditioning and the like using exhaust heat by the operator of the complex consumer facility, it is possible to reduce the electricity, gas, and water charges in each of the customer facilities. 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.

Further, in the above description, as shown in FIG. 1, the subordinate meter device 5 is connected to the shared portion and the subordinate control device 6 is provided in the shared portion, but they do not necessarily have to be provided. When the subordinate meter device 5 is not connected to the shared portion and the subordinate control device 6 is not provided in the shared portion, the data of the subordinate meter device 5 connected to each of the customer facilities is obtained from the data of the superior meter device 1. By subtracting all the sums, the power consumption of the common areas can be calculated. The calculation of the power consumption of the shared portion can be performed by the host controller 8 or the server device 9 .

In the above description, the host controller 8 selects a rate plan for the low-voltage bulk power receiving contract based on the power consumption measured by the host meter device 1, but the selection is made based on the power consumption (kW). may In addition, the storage battery is controlled based on the power consumption (kWh) so as not to exceed the contract amount of the low-voltage bulk power receiving contract, but may be controlled based on the power consumption (kW).

Further, 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 the 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 programs can be distributed by selling, assigning, or lending portable recording media such as DVDs or CD-ROMs. , and can be distributed by transferring the program from a server to another computer via a network. Also, 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. Also, as another embodiment of this program, the computer may read the program directly from a portable recording medium and execute processing according to the program, and furthermore, each time the program is transferred to this computer from the server In addition, it is also possible to sequentially execute processing according to the received program.

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

Claims (18)

A business that manages a collective housing that receives low-voltage bulk power from the grid based on a low-voltage bulk power receiving contract that is less than the power required for the high-voltage bulk power receiving contract, and is different from a power company that concludes the low-voltage bulk power receiving contract. A power supply system in a single apartment building having a plurality of dwelling units and a common area where electricity charges are distributed from the person according to the amount of power used,
a high-level meter device that is directly connected to the system without passing through a cubicle-type high-voltage power receiving facility and measures the amount of power purchased from the system in the housing complex;
a first breaker connected to the system side ;
a low-voltage collective power receiving panel that receives power from the system via the host meter device without passing through the cubicle-type high-voltage power receiving equipment;
a plurality of second breakers connected respectively to the plurality of dwelling units and the common area ;
a branch point that supplies the power received by the low-voltage collective power receiving board to each of the plurality of dwelling units and the common area via the second breaker;
a plurality of subordinate meter devices connected between the branch point and the plurality of dwelling units for measuring power consumption of the plurality of dwelling units;
A distributed power supply including 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, between the upper meter device and the plurality of lower meter devices a distributed power source that is connected and capable of supplying power to the plurality of dwelling units and the common area;
has
The power supply system, wherein the capacity of the first breaker is smaller than the sum of the capacities of the second breakers. In the power supply system according to claim 1,
The power supply system, wherein the distributed power source is not connected between the branch point and the load of each dwelling unit. In the power supply system according to claim 1 or 2,
a subordinate control device provided in each of the plurality of dwelling units;
A power supply system comprising: a host controller installed in the collective housing, or installed in at least one of server devices inside and outside the collective housing. In the power supply system according to claim 3,
The lower-level meter device notifies the higher-level control device of the measured power consumption,
The power supply system, wherein the host controller notifies a server device that provides a meter reading data management support service of power consumption. In the power supply system according to claim 3 or 4,
A power supply system in which both the low-order control device and the high-order control device are HEMS. In the power supply system according to any one of claims 3 to 5,
The power supply system, wherein the upper control device requests the lower control device to reduce the power consumption by the plurality of dwelling units and the common area when receiving a demand response signal. In the power supply system according to any one of claims 3 to 6,
The distributed power supply includes the storage battery and the power generation device,
A power supply system according to claim 1, wherein, when the host control device acquires an instruction to suppress power output to the system, the power generation device causes the storage battery to be charged with surplus power. In the power supply system according to any one of claims 3 to 7,
The host controller selects the cheapest rate plan from among a plurality of rate plans of the low-voltage bulk power receiving contract based on the power consumption measured by the host meter device, A power supply system that notifies the server device. In the power supply system according to any one of claims 3 to 8,
The power supply system, wherein the host control device requests devices in the housing complex to reduce power consumption by the plurality of dwelling units and the common area when a demand response signal is acquired. In the power supply system according to any one of claims 3 to 9,
The power supply system, wherein the distributed power source includes at least a storage battery, and the host controller charges the storage battery with surplus power of another distributed power source different from the storage battery when the host controller acquires a demand response signal. The power supply system according to any one of claims 1 to 10 , further comprising a distribution board having the branch point,
The power supply system, wherein the power distribution board can supply the power received by the low-voltage collective power receiving board to all the dwelling units of the collective housing. In the power supply system according to any one of claims 1 to 11,
The power supply system, wherein the low-voltage collective power receiving board has the branch point inside. In the power supply system according to any one of claims 1 to 12,
The power supply system, wherein 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 the predetermined reference value. In the power supply system according to any one of claims 1 to 13,
The power supply system, wherein the storage battery discharges the charged power so that the power consumption of the collective housing does not exceed the contracted power of the low-voltage bulk power receiving contract. In the power supply system according to any one of claims 1 to 14,
The power supply system, wherein the electricity bill charged to each of the plurality of dwelling units does not exceed the electricity bill billed when each of the plurality of dwelling units individually contracts for each unit. In the power supply system according to any one of claims 1 to 15,
The power supply system, wherein the first breaker cuts off power greater than the contracted capacity of the low-voltage bulk power receiving contract. In the power supply system according to any one of claims 1 to 16,
A power supply system in which the distributed power source supplies power to at least the common area during a power outage. A business that manages a collective housing that receives low-voltage bulk power from the grid based on a low-voltage bulk power receiving contract that is less than the power required for the high-voltage bulk power receiving contract, and is different from a power company that concludes the low-voltage bulk power receiving contract. A power supply method in a single collective housing having a plurality of dwelling units and a common area in which electricity charges are distributed according to the amount of power used by a person,
a first step of measuring the power consumption in an upper-level meter device that is directly connected to the system without passing through a cubicle-type high-voltage power receiving equipment and measures the power consumption purchased from the system in the collective housing;
A second step of receiving power supply from the system via a first breaker that is connected to the system side and cuts off power that is larger than the contracted capacity of the low-voltage bulk power receiving contract, without passing through the cubicle-type high-voltage power receiving equipment. When,
a third step of supplying the electric power received in the second step to each of the plurality of dwelling units and the common area via a plurality of second breakers connected to each of the plurality of dwelling units and the common area; ,
a fourth step of measuring the power consumption of the plurality of dwelling units in the plurality of subordinate meter devices for measuring the power consumption of the plurality of dwelling units;
from a distributed power supply including 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 via between the upper meter device and the plurality of lower meter devices and a fifth step of supplying power to the plurality of dwelling units and the common area,
The power supply method, wherein the capacity of the first breaker is smaller than the sum of the capacities of the second breakers.

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