JP2021036767A - Power supply system and power supply method - Google Patents

Abstract

To realize a reduction in electricity bill in performing low-voltage batch power reception.SOLUTION: A power supply system 90 is a power supply system 90 in one apartment house that performs low-voltage batch power reception from a system 80, the apartment house having a plurality of dwelling units and a shared part to which an electricity bill is to be distributed according to the usage of electric power from a business entity different from an electric power company that concludes a low-voltage batch power reception contract. The power supply system 90 has a high-order meter device 1, a low-voltage batch power reception board 2 that has a first breaker connected to the system 80, a distribution switchboard 4 that has a plurality of second breakers respectively connected to the plurality of dwelling units and the shared part, a plurality of low-order meter devices 5 that measure the power consumption of the plurality of dwelling units, and a dispersion type power source 3 that is connected between the high-order meter device 1 and the plurality of low-order meter devices 5. The capacity of the first breaker is smaller than the total value of the capacities of the second breakers.SELECTED DRAWING: Figure 1

Description

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

Conventionally, there is known a power distribution system in an apartment house in which a high-voltage collective power reception contract is concluded and the received power is distributed to each house (for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2002-118961 Japanese Patent No. 3869648

However, the high-voltage power receiving / transforming device has a certain cost. In addition, since a high-voltage collective power reception contract cannot be concluded unless the power contract has a capacity of a standard value (for example, 50 kW) or more, a high-voltage collective power reception contract can only be concluded for an apartment house of a certain size or larger. It is possible to conclude a low-voltage collective power reception contract even in an apartment house of a scale that cannot conclude a high-voltage collective power reception contract, but it is not always possible to realize a reduction in electricity charges.

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

In order to solve the above problems, the power supply system according to the embodiment of the present invention is
A business that manages the collective housing that receives low-voltage collective power from the grid based on the low-voltage collective power reception contract of less than the power required for the high-voltage collective power reception contract, and is different from the electric power company that concludes the low-voltage collective power reception contract. It is a power supply system in a single apartment building with multiple dwelling units and common areas, where electricity charges will be distributed according to the amount of power used by the person.
A high-end meter device that is directly connected to the system without going through a cubicle-type high-voltage power receiving facility and measures the amount of power purchased from the system in the apartment complex.
A low-voltage collective power receiving board having a first breaker connected to the system side and receiving power from the system via the host meter device without going through the cubicle-type high-voltage power receiving equipment.
It has a plurality of second breakers connected to each of the plurality of dwelling units and the common portion, and the electric power received by the low-voltage collective power receiving board is transmitted to the plurality of dwelling units and the common portion via the second breaker. The distribution board to supply to each and
A plurality of lower meter devices for measuring the power consumption of the plurality of dwelling units, and
A distributed power source that includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a photovoltaic power generation device, and a wind power generation device, and is between the upper meter device and the plurality of lower meter devices. A distributed power source that is connected and can supply power to the plurality of dwelling units and the common area via the distribution board.
Have,
The capacity of the first breaker is smaller than the total capacity of each of the second breakers.

Further, in order to solve the above problems, the power supply method according to the embodiment of the present invention is
A business that manages the collective housing that receives low-voltage collective power from the grid based on the low-voltage collective power reception contract of less than the power required for the high-voltage collective power reception contract, and is different from the electric power company that concludes the low-voltage collective power reception contract. This is a method of supplying electricity to a single apartment building that has multiple dwelling units and common areas, where electricity charges will be distributed by the person according to the amount of electricity used.
The first step of measuring the power consumption in a high-level meter device that is directly connected to the system without going through a cubicle type high-voltage power receiving facility and measures the power consumption purchased from the system in the apartment house.
A second step of having a first breaker connected to the grid side to cut off power larger than the contracted capacity of the low-voltage collective power receiving contract, and receiving power from the grid without going through the cubicle-type high-voltage power receiving equipment. When,
Each of the plurality of dwelling units and the common portion has a plurality of second breakers connected to the plurality of dwelling units and the common portion, and the electric power received in the second step is transmitted to the plurality of dwelling units and the common portion via the second breaker. 3rd step to supply to
In the plurality of lower meter devices for measuring the power consumption of the plurality of dwelling units, the fourth step of measuring the power consumption of the plurality of dwelling units and
From a distributed power source that includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a photovoltaic power generation device, and a wind power generation device, via between the upper meter device and the plurality of lower meter devices. Including the fifth step of supplying electric power to the plurality of dwelling units and the common area.
The capacity of the first breaker is smaller than the total capacity of each of the second breakers.

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

It is a functional block diagram of the power supply system which concerns on embodiment of this invention. It is a figure which shows the state of the power consumption when the upper control device of FIG. 1 controls a storage battery. It is a flowchart which shows the operation of the power supply system of FIG.

FIG. 1 is a functional block diagram of the power supply system 90 according to the 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 an upper meter device 1, a collective power receiving board 2, a distributed power source 3, and a distribution board 4, and further includes a lower meter device 5, a lower control device 6, a load 7, a higher control device 8, and a server. At least one of the devices 9 may be included. Each function of the power supply system 90 will be described, but it should be noted that it 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 consumer facility. Be done. As an alternative example, the collective power receiving board 2 may have the upper meter device 1 and the distribution board 4 inside. Further, the host meter device 1 may be provided outside the complex consumer facility. The complex consumer facility is an apartment house in this embodiment, and has a plurality of consumer facilities (for example, 3 units on the 1st floor and 3 units on the 2nd floor for a total of 6 units) and common areas (for example, corridors, stairs, elevator halls). Have. The lower control device 6 is provided in each of the consumer facilities and the common area, and the load 7 is also provided in each of the consumer facilities and the common area.

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

The complex consumer facility will conclude a low-voltage collective power reception contract with the electric power company and also conclude a power sale contract for surplus power from solar power generation. In addition, the complex consumer facility concludes an electric power contract with each resident of the consumer facility. In this way, the complex consumer facility receives electric power from the electric power company and supplies the received electric power to the consumer facility.

The upper meter device 1 is a meter device with certification, and measures the power consumption of the complex consumer facility. The upper meter device 1 outputs the measured power consumption to the upper control device 8 for calculation of electricity charges and the like. The meter device with certification is one that has been certified by the measurement method and is within the validity period of the certification. Further, a smart meter may be used as the host meter device 1.

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

The distributed power source 3 can supply electric 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 photovoltaic power generation device, and a wind power generation device. Therefore, it is possible to reduce electricity charges by combining various types of distributed power sources. The storage battery can output independently, and can supply electric power to at least one of the consumer facility and the common area in the event of a power failure, for example. The power generator can supply the generated power to at least one of the storage battery, the consumer facility and the common area.

The distribution board 4 branches the electric power received by the collective power receiving board 2 into a plurality of branch trunks during the interconnection operation, and supplies the electric power to at least one of the common area and the consumer facility. Further, the distribution board 4 branches the electric power supplied from the distributed power source 3 into a plurality of branch trunks and distributes the electric power to the consumer facilities.

The lower meter device 5 is, for example, a certification electric meter (child meter) with certification, and is connected to each of the consumer facilities. The lower meter device 5 connected to each of the consumer facilities measures the power consumption of each load 7 of the consumer facility. The lower meter device 5 is connected to the distribution board 4 and is provided by the business operator inside or outside the customer facility. The lower meter device 5 is also connected to the common area. The lower meter device 5 connected to the common area measures the power consumption of the load 7 in the common area. 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 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 external storage. Stored in the medium. The lower control device 6 is provided in each of the consumer facilities and at least one of the common areas, and can control the power consumption of the load 7 of at least one of the corresponding consumer facilities and the common areas. 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 consumer facility and the common area, the lower control device 6 can control the load 7 to suppress the power consumption.

The load 7 is a power load that consumes electric power, and is, for example, various electric products such as an air conditioner, a microwave oven, a refrigerator, a television, and a router used by a consumer facility. The load 7 may be a machine such as an air conditioner or a lighting fixture, a lighting equipment, or the like. Of the loads 7, those in the common area are devices that consume power in the common area, such as lighting equipment and emergency equipment (for example, fire alarms).

The upper control device 8 is, for example, HEMS. The process executed by the upper 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 the storage unit of the upper control device 8 or an external storage medium. .. The upper control device 8 is provided in the complex consumer facility. As an alternative example, the upper control device 8 may be provided in at least one server device 9 inside the complex consumer facility and outside the complex consumer facility. The upper control device 8 periodically (for example, once an hour) acquires the amount of electric power measured by the lower meter device 5 and outputs it to the server device 9. Further, the host control device 8 monitors the operating state of the distributed power source 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 the upper control device 8 acquires the demand response signal, the upper control device 8 requests the lower control device 6 to suppress the power consumption by the plurality of consumer facilities. For example, when the host control device 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. The subordinate controller 6 may be requested to carry out the reduction as determined. As a result, the business operator who manages each of the plurality of consumer facilities or the complex consumer facility can obtain an incentive. The upper control device 8 may similarly suppress the power consumption in the common area.

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 distribution company (electric power aggregator), or the like. The incentive from the sender is first given to the operator who manages the complex consumer facility. Then, the business operator distributes incentives from the sender according to the degree of contribution of the consumer of the consumer facility to the demand response. The incentive of the business operator given to the consumer may be different from the incentive given by the sender.

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

The server device 9 is used by a business operator that manages a complex consumer facility. 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 to support meter reading data management, charge billing data creation support, energy creation / energy storage facility management, and electricity use for consumer facilities (for residents). Provide a quantity visualization service (Web service) and the like. When the server device 9 acquires the error information from the host control device 8, it notifies the observer 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 receives the notification from the host control device 8 that the storage battery has changed to the self-sustaining output mode, it determines that the breaker of the collective power receiving board 2 has been turned off, and notifies the observer of the warning information. In general, it is difficult for a resident of a consumer facility to turn on the breaker of a low-voltage collective power receiving panel. Therefore, the observer who 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 is turned off when the communication with the host control device 8 is cut off.

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

As a first configuration, the power supply system 90 not only performs low-voltage batch power reception, but also has a distributed power source 3. A plurality of consumer facilities share the distributed power source 3, and the amount of power purchased from the system 80 can be reduced by receiving power from the distributed power source 3 during a time when the electricity rate is high. As a result, it is possible to reduce the electricity bill.

As a second configuration, the contracted capacity in the low-voltage collective power receiving contract is smaller than the total value of the breaker capacities of the consumer facilities. For example, assume that the number of consumer facilities in a complex consumer facility is 6 and the breaker capacity of each unit is 40A. Assuming that the breaker capacity of the common area is 50 A, 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 the units will consume the maximum capacity at the same time, for example, a multi-purpose consumer facility concludes a low-voltage collective power receiving contract with a contract capacity of 240A. As a result, it is possible to reduce the electricity bill.

As a third configuration, instead of each of the plurality of consumer facilities concluding a contract for each house, the complex consumer facility concludes a low-voltage collective power receiving contract, and the plurality of consumer facilities receive power received by the low-voltage collective power receiving contract. Receive supply. Depending on the rate plan of the electric power company, the electricity rate per unit decreases as the contracted capacity increases. Therefore, it is possible to reduce the electricity charge.

As a fourth configuration, the upper control device 8 acquires a value (unit: kWh) of the amount of power purchased from the upper meter device 1 and outputs the value (unit: kWh) 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 batch power reception 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 system 80 in the daytime is relatively small. Therefore, it is possible to reduce the electricity rate by changing the rate plan and lowering the electricity rate at night. Therefore, the upper control device 8 determines a rate plan in which the electricity rate at night is low. The host control device 8 outputs the determined rate plan to the server device 9. Therefore, the business operator using the server device 9 can determine which rate plan should be adopted. That is, the selection, change, and determination of the rate plan may be performed by the upper control device 8, the server device 9, or the business operator. A power company, a power distribution company, a power transmission and distribution company, a specific-scale electric power company, or the like may select, change, and determine a rate plan.

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 between the first mode and the second mode with the first mode as the normal mode as follows.

As the first mode, 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. The predetermined reference value can be set arbitrarily. For example, the predetermined reference value can be set so that the nighttime is when the electricity unit price is lower than the predetermined reference value and the daytime is when the electricity unit price is higher than the predetermined reference value. As an alternative example, two reference values (first reference value and second reference value) may be set as predetermined reference values. More specifically, as the first mode, the storage battery charges the electric power from the system 80 when the electricity unit price is lower than the first reference value (for example, at night), and the electricity unit price is the second reference value equal to or higher than the first reference value. Discharge at higher times (eg daytime). When the distributed power source 3 further includes a photovoltaic power generation device, the storage battery may charge the storage battery with surplus power of the photovoltaic power generation device in the daytime. In the daytime when the surplus power of the photovoltaic power generation device 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 consumer facility does not exceed the contract power of the low-voltage collective power receiving contract. That is, when the power consumption increases and falls within the predetermined power from the contracted power of the low-voltage batch 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 can purchase more than the contracted power, it is possible to reduce the power supply system 90 from purchasing more than 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 batch power reception contract (that is, without switching to the second mode). It is shown in FIG. As shown in FIG. 2, the host control device 8 purchases electricity from the system 80 at night or in the early morning (0:00 to 7:00) to charge the storage battery, and the power generation device in the next time zone (7:00 to 16:00). The power generated by the (photovoltaic power generation device) and the discharged power from the storage battery cover the power consumption of multiple consumer facilities. Surplus electricity is sold even if it is covered. In the subsequent time zone (16:00 to 24:00), the power consumption exceeds the power generation amount, but the upper control device 8 discharges the storage battery to suppress the power purchase power amount from the system 80.

With at least the above five configurations, the electricity charges charged to each of the plurality of consumer facilities do not exceed the electricity charges charged when each of the plurality of consumer facilities individually makes a contract for each house.

The power supply system 90 has the following configuration as well as a configuration for realizing reduction of electricity charges.

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

Second, the plurality of consumer facilities share the distributed power source 3. Therefore, the installation cost of the distributed power source 3 per unit is lower than the cost when the distributed power source 3 is installed 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 from the system 80 in 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 electric power supply system 90 supplies electric 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 lower 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. Further, the power supply system 90 can perform step S4 at any time. The arbitrary time point is when the unit price of electricity is high, such as in the daytime, or when the power consumption may exceed the contracted power of the low-voltage collective power receiving contract.

Further, the power supply system 90 does not have to perform steps S4 and S5 depending on the situation. For example, when it is not necessary to supply electric power from the distributed power source 3 to the plurality of consumer facilities, the electric power supply system 90 does not have to perform step S5. That is, the electric power supply system 90 may supply electric 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 makes a low-voltage batch power reception contract with less power than the power required for the high-voltage batch power reception contract. The power supply system 90 includes a collective power receiving board 2 that receives power from the system 80, a high-level meter device 1 that measures the amount of power consumed by the combined consumer facility, and a combined consumer facility that receives the power received by the collective power receiving board 2. It has a distribution board 4 that supplies power to a plurality of customer facilities, and a distributed power source 3 that can supply power to a plurality of customer facilities. That is, the complex consumer facility not only receives low-voltage collective power, but also has a distributed power source 3. Consumer facilities share the distributed power source 3, and the amount of power purchased can be suppressed by receiving power from the distributed power source 3 during times when electricity charges are high. As a result, it is 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, the complex consumer facility will make a low-voltage collective power reception contract with a contract capacity smaller than the total value of the breaker capacity of all units and the breaker capacity of common areas. Can be tied. Alternatively, the complex consumer facility can supply power by the low-voltage collective power reception contract even if the total value of the breaker capacity of all the units and the breaker capacity of the common area is a value required for the high-voltage collective power reception contract. As a result, it is possible to reduce the electricity bill.

In addition, depending on the rate plan of the electric power company, the electricity rate per unit decreases as the contracted capacity increases. According to this embodiment, each of the consumer facilities does not conclude a contract for each house, but the complex consumer facility concludes a low-voltage collective power receiving contract. As a result, each consumer facility will be assigned electricity charges according to the amount of electricity used by the operator of the complex consumer facility, and instead of paying the electricity charges in each household contract, a low-voltage collective power reception contract was made. It is possible to realize a reduction in electricity charges at each consumer facility.

Further, 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 photovoltaic 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 is provided in the lower control device 6 provided in each of the plurality of consumer facilities and the complex consumer facility, or in the complex consumer facility and in the complex consumer facility. It further has an upper control device 8 provided on at least one of the outer server devices 9. Therefore, it is possible to control the power consumption for each consumer facility.

Further, according to the present embodiment, when the upper control device 8 acquires the demand response signal, the upper control device 8 requests the lower control device 6 to suppress the power consumption by the plurality of consumer facilities. Therefore, it is possible to control the amount of power consumption for each of a plurality of consumer 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 system 80, the storage battery is charged with the surplus power of the power generation device. Therefore, not only can it respond to the output suppression instruction, but it is also possible 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 lower meter device 5 for measuring the power consumption of each of the plurality of consumer facilities, and the lower meter device 5 controls the measured power consumption higher. Notify device 8. Therefore, the host control device 8 can provide a service to each of the consumer facilities according to the power consumption of each of the consumer facilities.

Further, according to the present embodiment, the upper control device 8 selects the cheapest rate plan among the plurality of rate plans of the low-voltage collective power receiving contract based on the power consumption measured by the upper meter device 1, and the combined demand. Notify the server device 9 of the business operator that manages the house facility. Therefore, the business operator or the like can determine the cheapest plan, and thus can realize the reduction of the electricity charge.

Further, according to the present embodiment, the storage battery is charged when the electricity unit price is lower than the predetermined reference value, and discharged when the electricity unit price is higher than the predetermined reference value. Therefore, the amount of power purchased from the system 80 when the unit price of electricity is high can be reduced, and thus the electricity charge can be reduced.

Further, according to the present embodiment, the storage battery discharges the charged electric power and receives the electric power in the entire complex consumer facility so that the power consumption of the entire complex consumer facility does not exceed the contracted power of the low-voltage collective power receiving contract. Reduce the amount of electricity. Therefore, it is possible to reduce the power supply system 90 from purchasing more than the contracted power because the power consumption of the entire complex consumer facility exceeds the contracted power.

Further, according to the present embodiment, the electricity charges charged to each of the plurality of consumer facilities do not exceed the electricity charges charged when each of the plurality of consumer facilities individually makes a contract for each house. Therefore, the satisfaction level of each resident of the consumer facility can be increased, and the demand for the power supply system 90 can be increased.

Although the present invention has been described with reference to the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are within 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. Further, when the present invention is implemented as an invention of a method, it is possible to combine or divide a plurality of parts, steps, and the like into one.

The above description is for a case where the complex consumer facility does not consume the power required for the high-voltage collective power reception contract, but the present invention is not limited to this. That is, even if the complex consumer facility consumes the power required for the high-voltage batch power reception contract (for example, the sum of the power of each household contract is the power required for the high-voltage batch power reception contract), the distributed power source By having 3, it is possible to cover the electric power with a low-voltage collective power receiving contract. As a result, the complex consumer facility does not have to make a high-voltage collective power receiving contract, so that it is not necessary to install a cubicle-type high-voltage power receiving facility, and the initial investment or maintenance cost can be reduced.

Further, the above description is a case where the upper control device 8 requests the lower control device 6 to suppress the power consumption when the upper control device 8 receives the demand response signal. However, the upper control device 8 may not request the lower control device 6 in the consumer facility, but may request the suppression only from the lower control device 6 in the common area. Such processing can be performed, for example, when the amount of power consumption to be suppressed is smaller than a predetermined reference value. In this case, since it is not necessary for the host control device 8 to inquire of the consumer whether or not to respond to the demand response, it is possible to easily respond to the demand response.

Further, the upper control device 8 may selectively request only the lower control device 6 in some consumer facilities, and which consumer facility is requested is, for example, the current power consumption in the consumer facility. It may be decided according to. When the upper control device 8 can directly control the equipment in each consumer facility, the upper control device 8 directly controls the equipment in the customer facility according to the demand response without going through the lower control device 6. You may. When the host control device 8 directly controls the device, the incentive given to the consumer may be increased.

When a fuel cell is used as the 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, it is possible to reduce the electricity charges, gas charges, and water charges in each of the customer facilities by collectively providing the air conditioning and the like using the exhaust heat by the business operator of the complex consumer 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.

Further, in the above description, as shown in FIG. 1, the lower meter device 5 is connected to the common area and the lower control device 6 is provided in the common area, but it is not always necessary to provide them. When the lower meter device 5 is not connected to the common area and the lower control device 6 is not provided in the common area, the data of the lower meter device 5 connected to each of the consumer facilities is obtained from the data of the upper meter device 1. By subtracting the total of all, the power consumption of the common area can be calculated. The upper control device 8 or the server device 9 can calculate the power consumption of the common area.

In the above description, the upper control device 8 selects the rate plan of the low-voltage collective power receiving contract based on the electric energy measured by the upper meter device 1, but selects and determines based on the power consumption (kW). You may. 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 receiving contract, but may be controlled based on the power consumption (kWh).

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. This can be realized by reading and executing this program by the central processing unit (CPU) of the computer. Further, such a program can be distributed by selling, transferring, renting, etc. a portable recording medium such as a DVD or a CD-ROM, and such a program can be distributed, for example, in a storage unit of a server on a network. The program can be distributed by storing it in the computer and transferring the program from the server to another computer via the network. Further, 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. Further, as another embodiment of this program, a computer may read the program directly from a portable recording medium and execute processing according to the program, and further, every time the program is transferred from the server to the computer. In addition, processing may be sequentially executed according to the received program.

1 Upper meter device 2 Collective power receiving board 3 Distributed power supply 4 Distribution board 5 Lower meter device 6 Lower control device 7 Load 8 Upper control device 9 Server device 80 system 90 Power supply system

Claims (18)

A business that manages the collective housing that receives low-voltage collective power from the grid based on the low-voltage collective power reception contract of less than the power required for the high-voltage collective power reception contract, and is different from the electric power company that concludes the low-voltage collective power reception contract. It is a power supply system in a single apartment building with multiple dwelling units and common areas, where electricity charges will be distributed according to the amount of power used by the person.
A high-end meter device that is directly connected to the system without going through a cubicle-type high-voltage power receiving facility and measures the amount of power purchased from the system in the apartment complex.
A low-voltage collective power receiving board having a first breaker connected to the system side and receiving power from the system via the host meter device without going through the cubicle-type high-voltage power receiving equipment.
It has a plurality of second breakers connected to each of the plurality of dwelling units and the common portion, and the electric power received by the low-voltage collective power receiving board is transmitted to the plurality of dwelling units and the common portion via the second breaker. The distribution board to supply to each and
A plurality of lower meter devices for measuring the power consumption of the plurality of dwelling units, and
A distributed power source that includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a photovoltaic power generation device, and a wind power generation device, and is between the upper meter device and the plurality of lower meter devices. A distributed power source that is connected and can supply power to the plurality of dwelling units and the common area via the distribution board.
Have,
A power supply system in which the capacity of the first breaker is smaller than the total capacity of each of the second breakers. In the power supply system according to claim 1,
The distributed power source is a power supply system in which the distribution board and the load of each dwelling unit are not connected. In the power supply system according to claim 1 or 2.
The lower control device provided in the plurality of dwelling units and
A power supply system having a higher-level control device provided in the apartment house or in at least one server device inside the apartment house and outside the apartment house. In the power supply system according to claim 3,
The lower meter device notifies the upper control device of the measured power consumption, and the lower meter device notifies the upper control device.
The upper control device is a power supply system that notifies a server device that provides a meter reading data management support service of the amount of power consumption. In the power supply system according to claim 3 or 4.
The lower control device and the upper control device are both HEMS power supply systems. In the power supply system according to any one of claims 3 to 5,
A power supply system that requires the lower control device to suppress power consumption by the plurality of dwelling units and the common portion when the upper control device acquires a demand response signal. In the power supply system according to any one of claims 3 to 6.
The distributed power source includes the storage battery and the power generation device.
A power supply system in which, when the host control device obtains an instruction to suppress the output of power to the system, the power generation device charges the storage battery with surplus power. In the power supply system according to any one of claims 3 to 7.
The upper control device selects the cheapest rate plan from the plurality of rate plans of the low-voltage collective power receiving contract based on the power consumption measured by the upper meter device, and manages the apartment house. A power supply system that notifies server equipment. In the power supply system according to any one of claims 3 to 8.
The higher-level control device is a power supply system that requests equipment in the housing complex to suppress 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 distributed power source includes at least a storage battery, and when the host control device acquires a demand response signal, the power supply system charges the storage battery with surplus power of another distributed power source different from the storage battery. In the power supply system according to any one of claims 1 to 10.
The distribution board is a power supply system capable of supplying the electric power received by the low-voltage collective power receiving board to all the dwelling units of the apartment house. In the power supply system according to any one of claims 1 to 11.
The low-voltage batch power receiving board is a power supply system having the distribution board inside. In the power supply system according to any one of claims 1 to 12,
The storage battery is a power supply system that charges when the unit price of electricity is lower than a predetermined reference value and discharges 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 storage battery is a power supply system that discharges charged power so that the power consumption of the housing complex does not exceed the contract power of the low-voltage collective power receiving contract. In the power supply system according to any one of claims 1 to 14.
An electricity supply system in which the electricity charges charged to each of the plurality of dwelling units do not exceed the electricity charges charged when each of the plurality of dwelling units individually makes a contract for each unit. In the power supply system according to any one of claims 1 to 15.
The first breaker is a power supply system that cuts off power larger than the contracted capacity of the low-voltage collective power receiving contract. In the power supply system according to any one of claims 1 to 16.
The distributed power source is a power supply system that supplies power to at least the common area in the event of a power failure. A business that manages the collective housing that receives low-voltage collective power from the grid based on the low-voltage collective power reception contract of less than the power required for the high-voltage collective power reception contract, and is different from the electric power company that concludes the low-voltage collective power reception contract. This is a method of supplying electricity to a single apartment building that has multiple dwelling units and common areas, where electricity charges will be distributed by the person according to the amount of electricity used.
The first step of measuring the power consumption in a high-level meter device that is directly connected to the system without going through a cubicle type high-voltage power receiving facility and measures the power consumption purchased from the system in the apartment house.
A second step of having a first breaker connected to the grid side to cut off power larger than the contracted capacity of the low-voltage collective power receiving contract, and receiving power from the grid without going through the cubicle-type high-voltage power receiving equipment. When,
Each of the plurality of dwelling units and the common portion has a plurality of second breakers connected to the plurality of dwelling units and the common portion, and the electric power received in the second step is transmitted to the plurality of dwelling units and the common portion via the second breaker. 3rd step to supply to
In the plurality of lower meter devices for measuring the power consumption of the plurality of dwelling units, the fourth step of measuring the power consumption of the plurality of dwelling units and
From a distributed power source that includes at least one of a storage battery and a power generation device including at least one of a fuel cell, a photovoltaic power generation device, and a wind power generation device, via between the upper meter device and the plurality of lower meter devices. Including the fifth step of supplying electric power to the plurality of dwelling units and the common area.
A power supply method in which the capacity of the first breaker is smaller than the total value of the capacities of the second breakers.

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