JP2016144370A - Measurement device, program, method and power management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system for selecting a power company in accordance with a time zone.SOLUTION: The power supply system comprises a power amount measurement device 4 including: a power amount measurement part 41 for measuring a power amount of power that is transmitted via a power lead-in line; and a counter distribution part 42 for correspondently storing, based on selection information of a power supply source to be received in predetermined timing, the measured power amount and identification information of a power supply source that is identified based on selection information, in a storage part. The power supply system also comprises a power management device HEMS 9 (Home Energy Management System) including a power company selection part 91 for selecting a power supply source indicating lowest rates in a time zone of a present time by referring to a plurality of rate sheets 92a and 92b indicating rates per unit power amount for each time zone of a plurality of power supply sources, and transmitting identification information of the selected power supply source to a distribution part that distributes a consumed power amount to the selected power supply source on the basis of the identification information.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a measurement device, a program, a method, and a power management device.

  In order to contribute to the protection and improvement of the environment related to electric power generation, the use of electric power by natural energy such as sunlight and wind power is recommended. Moreover, nuclear power generation, thermal power generation, etc., which can stably meet demand, are continuously important power sources.

  On the other hand, a power consumer such as a manufacturer tends to select an inexpensive power source from various power sources including power from natural energy. In order to acquire the amount of power consumed by the natural energy that was actually used, the amount of power used by the power source used when manufacturing the product was stored in a database, and the natural energy was referenced by referring to the database. A technique for acquiring the amount of electric power by means of is known.

JP 2006-311675 A

  In Japan, power-related deregulation, that is, liberalization of electricity, is being promoted in Japan for the purpose of revitalizing the electricity market. This deregulation of electric power is performed in stages, but includes the liberalization of the electric power retail business. In the future, it is expected that a usage form for selecting an electric power company in a time zone will be desired by small consumers such as ordinary households and shops.

  However, with the above-described technology, it is not possible to obtain charge information to be paid to each of the selected businesses in accordance with the usage amount by selecting the power company in the power supply facility of the small consumer.

  Therefore, in one aspect, an object of the present invention is to measure the amount of power that can select a power company in a time zone.

  According to an aspect, the measurement unit that measures the amount of power transmitted through the service line, the power amount measured based on the selection information of the power supply source that is received at a predetermined timing, and the selection There is provided a measuring device having a distribution unit that associates identification information of a power supply source specified based on the information and stores the identification information in a storage unit.

  In addition, as a means for solving the above problems, a measurement program and a measurement method can be used.

  Moreover, according to another aspect, the lowest charge in the current time zone is indicated by referring to a plurality of charge schedules showing the charges per unit power amount for each time zone of a plurality of power supply sources. A selection unit configured to select the power supply source and transmit the identification information of the selected power supply source to a distribution unit that distributes the amount of power consumed by the selected power supply source based on the identification information; A power management apparatus is provided.

  It is possible to measure the amount of electric power that can select an electric power company in a time zone.

It is a figure which shows the example of an electric power supply system. It is a figure which shows the 1st function structural example which concerns on a present Example. It is a figure showing the hardware constitutions of the electric energy measuring device in the 1st example of functional composition. It is a figure which shows the hardware constitutions of HEMS. It is a figure which shows the example of data of a fee table. It is a figure which shows the example of data of a correspondence table. It is a figure which shows the hardware constitutions of DR aggregator. It is a figure which shows a process sequence. It is a flowchart for demonstrating the selection process of the cheapest electric power company. It is a flowchart figure for demonstrating a counter distribution process. It is a figure which shows the 2nd function structural example which concerns on a present Example. It is a figure showing the hardware constitutions of the electric energy measuring device in the 2nd example of functional composition.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A power supply system 1000 for small consumers such as ordinary households and shops will be described with reference to FIG. FIG. 1 is a diagram illustrating an example of a power supply system.

  In FIG. 1, a power supply system 1000 includes a plurality of power plants 2, a power amount measuring device 4, a distribution board 5, a DR (Demand Response) aggregator 7, and a HEMS (Home Energy Management System) 9. .

  The plurality of power plants 2 are power plants by a plurality of electric power companies A, B,. Each power plant 2 supplies electric power to the customer's house 10 of each small consumer through the system 3. The system 3 includes a substation, a power pole, a transformer, and the like that constitute a power transmission and distribution network.

  The power amount measuring device 4 is a device that receives power supplied from the grid 3 and measures the power consumed at the customer's home 10 and corresponds to a smart meter. The electric energy measuring device 4 measures the electric energy digitally and transmits a measured value to the system of the electric power company using an internal communication function. In addition, since the electric energy measuring device 4 measures the electric energy in real time, the electric energy can be visualized by showing the current electric energy measured on the display panel or the like. Further, the power amount measuring device 4 may be provided with a remote disconnect function, a function of cooperation with the HEMS 9 and the like.

  The distribution board 5 safely supplies power to home wiring such as outlets and switches in the customer home 10.

  The DR aggregator 7 directly notifies the demand response (DR) notified from each electric power company A, B, etc. on the power supply side to each consumer, such as a general household or a store. Since it is not rational, it is located between each electric power company A, B, etc. and each small consumer, and is a device that collectively receives demand responses for consumers and redistributes to small consumers. . The DR aggregator 7 is installed in a dedicated business operator and communicates with the HEMS 9 of the customer's house 10 via the communication network 8. The communication network 8 is the Internet or the like.

  The demand response (DR) is to control power consumption from the power supply side to the customer side in order to stably supply power. There are “fee type” typified by electricity charges by time of day and “incentive type” that pays consideration for power saving. Charge types include CPP (Critical Peak Pricing) and RTP (Real-Time-Pricing).

  CPP means “emergency peak type charging”, and a power charge for each time zone is presented from the supply side. When electric power tightness is expected, the demand for electric power is suppressed by presenting an extremely high charge (for example, about three times) compared to a normal peak time zone.

  RTP stands for “real-time charge”, and it calculates and notifies the price by subdividing the time zone based on the previous day price in the wholesale power market and the previous day forecast value in the real-time market. Leveling is performed by suppressing the difference between the peak and bottom.

  The HEMS 9 corresponds to a residential energy (mainly electric power) management system. The HEMS 9 is an in-home device that makes it possible to visualize the amount of power used, control equipment for power saving, control a solar power generation system, a storage battery, and the like.

  Hereinafter, in the present embodiment, a case where a small consumer contracts with electric power companies A and B will be described, but the present embodiment can be applied even when contracted with two or more electric power companies.

  FIG. 2 is a diagram illustrating a first functional configuration example according to the present embodiment. In FIG. 2, the electric energy measuring device 4 includes an electric energy measuring unit 41, a counter allocating unit 42, a counter 43, and a communication unit 44. The HEMS 9 includes an electric power company selection unit 91, a charge table 92, and a correspondence table 93.

  The configuration of the HEMS 9 will be described. The electric power company selection unit 91 refers to the charge table 92, selects the electric power company with the lowest electric charge in the time zone including the current time, and selects the selection information 95 for specifying the counter 43 dedicated to the selected electric power company. This is notified to the counter distribution unit 42 of the quantity measuring device 4. The selection information 95 may indicate the slot number of the counter distribution unit 42 connected to the dedicated counter 43 in each power company.

  Each charge table 92 is table data indicating a charge per unit power amount for each time zone from each power company received from the DR aggregator 7. For example, the charge table 92a of the power company A, the charge table 92b of the power company B, and the like.

  The correspondence table 93 is table data in which the selection information 95 for specifying the counter 43 to be switched by the counter distribution unit 42 of the power amount measuring device 4 is associated with the contracted power company name.

  The configuration of the electric energy measuring device 4 will be described. The power amount measuring unit 41 is a power amount sensor or the like that measures power consumption. The counter distribution unit 42 selects one of the plurality of counters 43 based on the selection information 95 notified from the power company selection unit 91 of the HEMS 9 and sets a counter value.

  The counter 43 is installed for each of the electric power companies A and B. Here, the counters of electric power companies A and B are indicated by counters 43a and 43b, respectively. The counter value set in each counter 43 is notified to the electric power company by the communication unit 44 at predetermined intervals.

  When the predetermined interval notified to the electric power company is the same as the time zone indicating the fee structure, the counter value may indicate the amount of power consumed in the time zone. When the predetermined interval is longer than the time zone, the counter value may be set to information that can identify the selected time zone or the time zone and the consumed electric energy.

  The communication unit 44 is installed for each of the electric power companies A and B. Here, the communication units of the electric power companies A and B are indicated by communication units 44a and 44b. The communication unit 44 is installed in the power amount measuring device 4 by each electric power company with which the customer's house 10 has contracted, reads out values from the electric power company dedicated counter 43 at predetermined intervals, and transmits them to the electric power company. The counter 43 may be reset every time the value of the counter 43 is read.

  FIG. 3 is a diagram illustrating a hardware configuration of the electric energy measuring device in the first functional configuration example. In FIG. 3, the power amount measuring unit 41 and the counter allocating unit 42 of the power amount measuring device 4 show a configuration example realized by one computer device 1, but are not limited to this configuration example.

  The computer apparatus 1 includes an electric energy measuring unit 41, a CPU 42a, a memory 42b, a flash memory 42c, a short-range wireless communication unit 42d, and a plurality of slots 42e.

  The CPU 42a controls the computer device 1 according to a program stored in the memory 42b. The processing performed by the CPU 42a includes processing for selecting the slot 42e based on the selection information 95 designated by the HEMS 9 and storing the power amount measured by the power amount measuring unit 41 in the counter 43.

  The memory 42b stores a program executed by the CPU 42a, data necessary for processing by the CPU 42a, and the like.

  The flash memory 42c stores data related to various processes. Examples of data to be stored are selection information 95 for specifying the slot 42e instructed by the HEMS 9, the value of the electric energy measured by the electric energy measuring unit 41, and the like.

  The near field communication unit 42d performs near field communication such as HEMS9, WiFi (registered trademark), ZigBee (registered trademark), and Bluetooth (registered trademark).

  The counters 43 of each electric power company are connected to the plurality of slots 42e. The association between the electric power company and the counter 43 is managed by the HEMS 9. Of the plurality of slots 42e, in this example, the counter 43a of the power company A is connected to the slot # 1, and the counter 43b of the power company B is connected to the slot # 2.

  The power amount measurement unit 41 and the counter distribution unit 42 may be separate devices. In this case, the power amount measuring unit 41 may be provided with a short-range wireless communication unit, and the power amount measuring unit 41 and the counter allocating unit 42 may be able to communicate with each other.

  Each communication unit 44 is a device provided by each power company. In this example, the communication unit 44a communicates exclusively with the power company A, and the communication unit 44b communicates exclusively with the power company B.

  Each communication unit 44 includes a CPU 44a, a memory 44b, a flash memory 44c, an interface 44d, and a wireless LAN unit 44e, which are connected to each other via a bus.

  The CPU 44a controls the computer device 1 according to a program stored in the memory 44b. The processing performed by the CPU 44a includes a counter value by acquiring a counter value from the counter 43 via the interface 44d and communicating with a predetermined power company via the wireless LAN unit 44e. Includes the process of sending information.

  The memory 44b stores or temporarily stores programs executed by the CPU 42a, data necessary for processing by the CPU 44a, data obtained by processing by the CPU 44a, and the like.

  The flash memory 44c stores data related to various processes. Examples of data to be stored include a counter value read from the counter 43.

  The wireless LAN unit 44e transmits charging information based on the counter value to a predetermined electric power company by short-range wireless communication such as WiFi (registered trademark).

  FIG. 4 is a diagram illustrating a hardware configuration of the HEMS. In FIG. 4, the HEMS 9 is a computer device, and includes a CPU 9a, a memory 9b, a hard disk 9c, a short-range wireless communication unit 9d, and a network card 9e.

  The CPU 9a controls the HEMS 9 according to a program stored in the memory 9b. The process performed by the CPU 9a includes a process of selecting the cheapest electric power company at the current time and causing the short-range wireless communication unit 9d to transmit to the counter distribution unit 42.

  The memory 9b stores a program executed by the CPU 9a, data necessary for processing by the CPU 9a, and the like.

  The hard disk 9c stores programs and data related to various processes. For example, the charge table 9 provided by each electric power company and the correspondence table 93 in which the selection information 95 and the electric power company name are associated are stored in the hard disk 9c. The near field communication unit 9d performs near field communication such as WiFi (registered trademark), ZigBee (registered trademark), and Bluetooth (registered trademark) with the counter distribution unit 42, and is selected under the control of the CPU 9a. The counter distribution unit 42 is notified of the selection information 95 specifying the counter of the power company that has performed.

  The network card 9 e has a communication function and receives the charge table 92 from the DR aggregator 7 via the communication network 8. Under the control of the CPU 9a, the price table 92 of each power company is received from the DR aggregator 7 via the network card 9e, and the received price table 92 of each power company is stored in the hard disk 9c.

  FIG. 5 is a diagram showing an example of data in the fee table. In FIG. 5, a charge table 92 is a table that associates charges to be charged for each time zone, and has items such as a time zone (from), a time zone (to), and a power rate (yen / kWh).

  The time zone (from) indicates the disclosure time of the time zone. The time zone (to) indicates the end time of the time zone. The electric power charge (yen / kWh) indicates the amount charged when an electric power company is designated in the time zone specified by the time zone (from) and the time zone (to).

  In the charge table 92a of the electric power company A, the charge from the time zone 0:00 to 0:30 indicated by the time zone (from) and the time zone (to) is “23.2” yen / kWh. It is shown. The same applies to the charge table 92b of the electric power company B.

  FIG. 6 is a diagram illustrating an example of data in the correspondence table. In FIG. 6, a correspondence table 93 is a table in which selection information 95 for specifying the counter 43 of the power amount measuring device 4 is associated with a power company name, and includes items such as selection information and a power company name.

  The selection information is information for specifying the counter 43, and may indicate a slot number of the counter distribution unit 42, for example. The power company name is information for identifying the power company with which the customer's house 10 has a contract, and may be a company name or the like.

  In this example, the selection information “# 1” indicates that slot # 1 in the slot 42e of the counter distribution unit 42 corresponds to the counter 43a of “ABC power company”. Further, the selection information “# 2” indicates that slot # 2 of the slots 42e of the counter distribution unit 42 corresponds to the counter 43b of “EFG electric power company”.

  FIG. 7 is a diagram illustrating a hardware configuration of the DR aggregator. In FIG. 7, the DR aggregator 7 is a computer device, and includes a CPU 7a, a memory 7b, a hard disk 7c, and a network card 7d.

  The CPU 7a controls the DR aggregator 7 according to a program stored in the memory 7b. The processing performed by the CPU 7a includes the charge table 92 of each electric power company stored in advance in the hard disk 7c and the name of the electric power company (electric power company name) contracted for each customer's house 10 for distributing the necessary charge table 92. Referring to the distribution table shown, for each customer's home 10, the contracted power company fee table 92 is transmitted to the HEMS 9 of the customer's home 10 via the network card 7 d by the day before the fee table 92 is applied. Processing to include.

  The memory 7b stores a program executed by the CPU 7a, data necessary for processing by the CPU 7a, and the like.

  The hard disk 7c stores programs and data related to various processes. Each fee table 92 of a plurality of electric power companies including electric power companies A and B and a distribution table referred to in the distribution of the fee table 92 are stored in the hard disk 7c.

  The network card 7d has a communication function and distributes the charge table 92 to the HEMS 9 of each customer's house 10 through the communication network 8 under the control of the CPU 7a.

  Next, a processing sequence in the present embodiment will be described. FIG. 8 is a diagram showing a processing sequence. In FIG. 8, each electric power company 81 performs a demand response including a charge table 92 indicating a charge for each time zone to each DR aggregator 7 (step S <b> 10).

  Each DR aggregator 7 transmits, to each HEMS 9, a demand response including a charge table 92 of the electric company 81 with which the customer's house 10 is contracted by the day before the day on which the charge table 92 is applied (step S11). ).

  At the boundary time of each time zone, the HEMS 9 refers to the charge table 92 applied on the day, identifies the lowest price electric power company, refers to the correspondence table 93, and selects the selection information 95 corresponding to the identified electric power company. To get. Then, the HEMS 9 notifies the counter distribution unit 42 of the selection information 95 by notification of the cheapest electric power company (step S12).

  Next, the cheapest electric power company selection process performed by the HEMS 9 will be described. FIG. 9 is a flowchart for explaining the process of selecting the cheapest electric power company. In FIG. 9, the HEMS 9 determines whether or not the current time is a time zone boundary (step S21). If it is not the time zone boundary, the HEMS 9 repeats step S21 at a predetermined interval.

  In the case of a time zone boundary, the HEMS 9 refers to the tariff table 92 of a plurality of contracted electric power companies, and specifies the electric power company with the lowest electric charge in the time zone starting from the current time (step S22). Then, the HEMS 9 refers to the correspondence table 93 and transmits selection information 95 corresponding to the identified electric power company to the counter distribution unit 42 of the electric energy measuring device 4 (step S23).

  Next, the counter distribution process by the counter distribution unit 42 will be described. FIG. 10 is a flowchart for explaining the counter distribution processing. In FIG. 10, when receiving the selection information 95 from the HEMS 9 (Step S51), the counter distribution unit 42 stores the selection information 95 in the flash memory 42c and specifies the counter 43 (Step S52).

  The counter allocating unit 42 acquires the power amount from the power amount measuring unit 41 and stores it in the flash memory 42c as the power amount when the counter is selected (step S53). And the counter distribution part 42 memorize | stores the difference of the electric energy at the time of the predetermined electric energy in the counter 43 selected at the predetermined interval (step S54).

  In the first functional configuration example described above, each power company has a dedicated counter 43 between the communication unit 44 and the counter distribution unit 42 of each power company. May be configured as a dedicated measuring instrument 45 dedicated to each electric power company.

  FIG. 11 is a diagram illustrating a second functional configuration example according to the present embodiment. In FIG. 11, the electric energy measuring device 4 includes an electric energy measuring unit 41, a counter allocating unit 42, and a dedicated measuring instrument 45. The HEMS 9 includes an electric power company selection unit 91, a charge table 92, and a correspondence table 93. Except for the dedicated measuring instrument 45, it is the same as the first functional configuration example shown in FIG.

  The dedicated measuring instrument 45 is a measuring instrument dedicated to the electric power company installed by each electric power company, and includes a communication unit 44 that communicates exclusively with the electric power company and a counter 43 that counts the amount of power used. The communication unit 44 and the counter 43 are the same as those in the first functional configuration example in FIG.

  The counter distribution unit 42 selects and communicates with the dedicated measuring device 45 based on the selection information 95 received from the power company selection unit 91 of the HEMS 9 and notifies the amount of power while being selected.

  FIG. 12 is a diagram illustrating a hardware configuration of the power amount measurement device in the second functional configuration example. 12 is different from the hardware configuration of FIG. 3 in that the counter distribution unit 42 and the dedicated measuring instrument 45 of each electric power company are connected by wireless communication.

  The counter distribution unit 42 has an inter-unit interface 42f that performs wireless communication with the dedicated measuring instrument 45 of each electric power company instead of the slot 42e. In this example, the dedicated measuring instrument 44a of the electric power company A is performed via the inter-unit interface # 1, and the dedicated measuring instrument 44b of the electric power company B is performed via the inter-unit interface # 2.

  Therefore, the selection information 95 identifies one of the inter-unit interfaces 42f in this configuration.

  Each dedicated measuring instrument 45 has an inter-unit interface 44 f for communicating with the counter distribution unit 42 instead of the interface 44 d connected to the counter 43. Based on the information on the amount of power received from the counter allocator 42 via the inter-unit interface 44f, the information is stored in the counter 43 in the flash memory 44c. Information on the amount of power stored in the counter 4 of the flash memory 44c is transmitted to each power company by the wireless LAN unit 44e.

  Specifically, the flash memory 44c of the dedicated measuring instrument 44a of the electric power company A includes a counter 43a, and the information on the amount of power transmitted from the inter-unit interface # 1 of the counter distribution unit 42 is transmitted via the inter-unit interface 44f. Are received and stored in the counter 43a of the flash memory 44c.

  As described above, in the present embodiment, when contracts are made with a plurality of power companies, the charges for each time zone are compared, and the power company presenting the lowest price for each time zone is selected. Therefore, it can be set as the cheapest utilization form with respect to the whole power consumption.

  The present invention is not limited to the specifically disclosed embodiments, and can be principally modified and changed without departing from the scope of the claims.

The following additional notes are further disclosed with respect to the embodiment including the above examples.
(Appendix 1)
A measurement unit that measures the amount of power transmitted through the service line;
Distribution that stores the measured power amount and identification information of the power supply source specified based on the selection information in the storage unit in association with each other based on the selection information of the power supply source received at a predetermined timing And
A measuring apparatus comprising:
(Appendix 2)
The measuring apparatus according to appendix 1, wherein the measuring apparatus includes a plurality of storage units corresponding to a plurality of power supply sources.
(Appendix 3)
The measuring apparatus according to claim 2, further comprising a communication unit that is dedicated to each of the plurality of power supply sources and that transmits the power amount stored in the storage unit to the power supply source.
(Appendix 4)
In the measuring device that measures power consumption,
Measure the amount of power transmitted through the service line,
A process of associating the measured power amount with the identification information of the power supply source specified based on the selection information and storing it in the storage unit based on the selection information of the power supply source received at a predetermined timing A measurement program characterized by being executed.
(Appendix 5)
A measuring device that measures power consumption
Measure the amount of power transmitted through the service line,
A process of associating the measured power amount with the identification information of the power supply source specified based on the selection information and storing it in the storage unit based on the selection information of the power supply source received at a predetermined timing A measuring method characterized by performing.
(Appendix 6)
With reference to a plurality of tariffs showing the charges per unit power amount for each time zone of the plurality of power suppliers, the power supplier showing the lowest rate in the current time zone is selected and selected A power management apparatus comprising: a selection unit that transmits the identification information of the power supply source to a distribution unit that distributes the amount of power consumed by the selected power supply source based on the identification information.
(Appendix 7)
A power management device that manages power
With reference to a plurality of tariffs showing a charge per unit power amount for each time zone of a plurality of power suppliers, select the power supplier showing the lowest price in the current time zone,
A power management method for performing processing for transmitting the selected identification information of the power supply source to a distribution unit that distributes the amount of power consumed by the selected power supply source based on the identification information.

2 Power plants, 3 systems, 4 Energy measuring devices, 5 Distribution boards, 6 Home wiring, 7 DR aggregators, 8 Communication networks, 9 HEMS
10 Consumer homes,
41 Energy measurement unit,
42 Counter distribution part,
42a CPU, 42b memory 42c flash memory 42d short-range wireless communication unit 42e slot, 42g bus 42f unit interface 43 counter,
44 communication unit,
44a CPU, 44b memory 44c flash memory, 44d interface 44e wireless LAN unit 44f unit interface 91 power company selection unit,
92 Price List, 93 Correspondence List 95 Selection Information

Claims (6)

A measurement unit that measures the amount of power transmitted through the service line;
Distribution that stores the measured power amount and identification information of the power supply source specified based on the selection information in the storage unit in association with each other based on the selection information of the power supply source received at a predetermined timing And
A measuring apparatus comprising: The measuring apparatus according to claim 1, further comprising a plurality of storage units corresponding to a plurality of power supply sources. The measuring apparatus according to claim 2, further comprising a communication unit that is dedicated to each of the plurality of power supply sources and that transmits the power amount stored in the storage unit to the power supply source. In the measuring device that measures power consumption,
Measure the amount of power transmitted through the service line,
A process of storing the measured power amount in a storage unit associated with the identification information of the power supply source specified based on the selection information based on the selection information of the power supply source received at a predetermined timing. A measurement program characterized by being executed. A measuring device that measures power consumption
Measure the amount of power transmitted through the service line,
A process of associating the measured power amount with the identification information of the power supply source specified based on the selection information and storing it in the storage unit based on the selection information of the power supply source received at a predetermined timing A measuring method characterized by performing. With reference to a plurality of tariffs showing the charges per unit power amount for each time zone of the plurality of power suppliers, the power supplier showing the lowest rate in the current time zone is selected and selected A power management apparatus comprising: a selection unit that transmits the identification information of the power supply source to a distribution unit that distributes the amount of power consumed by the selected power supply source based on the identification information.

Images