WO2015033819A1 - 蓄電装置の放電開始時刻決定システム及び蓄電装置の放電開始時刻の決定方法 - Google Patents
蓄電装置の放電開始時刻決定システム及び蓄電装置の放電開始時刻の決定方法 Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
- G06Q10/06315—Needs-based resource requirements planning or analysis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/12—The local stationary network supplying a household or a building
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/12—The local stationary network supplying a household or a building
- H02J2310/14—The load or loads being home appliances
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/62—The condition being non-electrical, e.g. temperature
- H02J2310/64—The condition being economic, e.g. tariff based load management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
Definitions
- the present invention relates to a power storage device discharge start time determination system and a method for determining a power storage device discharge start time for effectively using a power storage device in a building including a solar power generation device and a power storage device. .
- Charge / discharge control of a power storage device is known for the purpose of reducing power charges and leveling a power load for a house equipped with a solar power generation device and a power storage device (Patent Documents 1-4, etc.) reference).
- the storage battery charging / discharging device of Patent Document 1 includes an arithmetic unit that calculates an optimal charging / discharging schedule of a storage location based on constraints, and an extracting unit that extracts a similar charging / discharging schedule from past charging / discharging patterns. And. And it is the structure which can provide a choice to a resident by displaying a several charging / discharging schedule calculated by the calculating part and the extraction part on a display part.
- Patent Document 2 discloses a system that can reduce the peak power demand using a small storage battery.
- this patent document 2 is set as the structure which reduces a peak power demand by using together the electric power generation by a solar power generation device, and the discharge of a storage battery in the daytime time zone when a peak power demand generate
- Patent Documents 3 and 4 a plurality of simulations in which the discharge start time of the power storage device is changed using past measurement data, and a control pattern that is optimal when evaluated in a relatively long period are described.
- a power control system that selects from calculation results is disclosed.
- Patent Document 2 can reduce peak power demand with a small capacity storage battery, but is a system that can be effectively used when a large capacity storage battery is installed. Absent.
- an object of the present invention is to provide a discharge start time determination system for a power storage device and a method for determining the discharge start time of a power storage device that can lead to effective use of the power storage device with a small calculation load. Yes.
- a storage device discharge start time determination system is a storage device discharge start time determination system in a building including a solar power generation device and a power storage device, and the solar power generation device Predicting means for predicting the amount of power generated and the power consumption of the building, a medium price range from the first time to the second time, a high price range from the second time to the third time, The power price is different from the low price range from the third time to the first time of the next day, and the power price storage means storing these switching times, and the power generation amount from the power consumption in the high price range
- a first comparison unit that compares the required amount at a high price obtained by subtracting the value and a dischargeable capacity of the power storage device, and the first comparison unit calculates the required price at a high price to be equal to or greater than the dischargeable capacity.
- Discharge the second time A discharge start time determining means that sets a start time and any time from the first time to before the second time when the required amount at the high price is less than the dischargeable capacity
- the method for determining the discharge start time of the power storage device includes the middle price range from the first time to the second time, the high price range from the second time to the third time, and the next day after the third time.
- the method for determining the discharge start time of a power storage device in a building including a solar power generation device and a power storage device when the power price is different from the low price range before the first time of the solar power generation A prediction step for predicting the power generation amount of the device and the power consumption amount of the building is compared with the required amount at the high price obtained by subtracting the power generation amount from the power consumption amount of the high price range and the dischargeable capacity of the power storage device
- the second time is set as the discharge start time when the required amount at the high price is calculated to be greater than or equal to the dischargeable capacity in the first comparison step, and the required amount at the high price is the discharge start time.
- the power storage device discharge start time determination system and the power storage device discharge start time determination method of the present invention configured as described above are the high-price required amount and the power storage device in the time zone when the power price calculated by the subtraction process is high. Compared with the dischargeable capacity, the discharge start time is advanced when there is a remainder in the dischargeable capacity.
- FIG. 1 is an explanatory diagram for explaining the flow of processing of the discharge start time determination system for the storage battery 2 as the power storage device of the present embodiment.
- FIG. 2 is an explanatory diagram illustrating a charge system in which three or more different power prices are set, which is a precondition for applying the present discharge start time determination system.
- FIG. 3 is an explanatory diagram schematically illustrating the configuration of the entire system to which the present discharge start time determination system is connected.
- Houses H1,..., HX as buildings controlled by this system are power grids for receiving power supply from power grids such as power plants of power companies and cogeneration facilities installed in each region. Connected to the power grid.
- these houses H1,... are provided with a solar cell panel 1 as a solar power generation device and a power storage location 2 as a power storage device for temporarily storing electric power. Further, these houses H1,... Are connected to an external communication network N such as the Internet. Then, transmission / reception of data such as measurement values and calculation processing results, transmission / reception of control signals, and the like are performed with an external management server 5 also connected to the communication network N.
- FIG. 4 is a block diagram showing details of the entire system schematically shown in FIG. This whole system has a configuration arranged in the house H1 as the house side and a configuration arranged in the management server 5 as the server side.
- the house H1 to be processed mainly includes a solar cell panel 1, a storage battery 2, a measuring means 3 for measuring the power generation amount of the solar cell panel 1 and the power consumption of the house H1, and a display monitor 4 as a display device. In preparation.
- the solar cell panel 1 installed in the house H1 is a device that generates sunlight by directly converting sunlight as solar energy into electric power using a solar cell.
- the solar cell panel 1 is a device that can supply electric power only during a time period in which sunlight can be received. Moreover, the DC power generated by the solar cell panel 1 is normally used after being converted into AC power by a power conditioner (not shown). Specifications such as the power generation capacity of the solar battery panel 1 installed in the house H1 are stored in a later-described house information database 51 on the management server 5 side.
- the storage battery 2 is also connected to the power conditioner in the same manner as the solar battery panel 1, and charging control and discharging control are performed.
- the storage battery 2 is charged with electric power having a low electric power price such as night electric power supplied from the grid power network.
- Specifications such as the storage capacity and rated output of the storage location 2 are also stored in the residence information database 51 on the management server 5 side.
- an air conditioner such as an air conditioner
- an illumination device such as a lighting stand or a ceiling light
- a home appliance such as a refrigerator or a television
- power load devices that are operated by electric power.
- electric vehicles and plug-in hybrid cars become power load devices when they are charged for running. Moreover, when it discharges for the electric power load apparatus of the house H1 similarly to the electrical storage place 2, it becomes an electrical storage apparatus.
- the measuring means 3 measures the amount of power actually generated by the solar cell panel 1 installed in the house H1. Moreover, the power consumption consumed by the power load device installed in the house H1 is also measured. This power consumption can be measured together with a distribution board or can be measured for each power load device.
- Measurement by the measuring means 3 can be performed at arbitrary intervals such as seconds, minutes, or hours.
- the measured values measured by the measuring means 3 are stored in a measured value database 52 (described later) on the management server 5 side for each measurement or every time it is aggregated in an arbitrary period such as a time unit or a day unit.
- the display monitor 4 displays the measured value measured by the measuring unit 3, the determination result by the discharge start time determining unit 63 described later on the management server 5 side, and the like.
- the display monitor 4 may be a dedicated terminal monitor or a screen of a general-purpose device such as a personal computer.
- the management server 5 connected to the house H1 via the external communication network N has a communication unit 71 as a communication unit, a control unit 6 that performs various controls, and various databases (51, 51) as a storage unit. 52, 53).
- the communication unit 71 sends specifications, measurement values, processing requests, and the like of various facilities transmitted from the house H1 to the control unit 6 of the management server 5, and data stored in various databases (51, 52, 53), It has the function of flowing the arithmetic processing result performed by the control part 6, an update program, etc. toward the house H1.
- a house information database 51 a measured value database 52, and a power price database 53 as storage means for reading and writing data through the control unit 6.
- the residence code (identification number) of each house H1,..., HX, the address associated with the residence code, the year of construction, the heat insulation performance, the floor plan, the electrical wiring, the member used, the solar cell Information such as the specifications of the panel 1 (power generation capacity (output)) and the specifications of the storage battery 2 (storage capacity, rated output) are stored.
- the measurement value database 52 stores measurement value data measured by each house H1,..., HX and received by the management server 5 via the communication unit 71. This measurement value can be identified in which house H1,..., HX by being stored in the measurement value database 52 in association with the house code.
- the data stored in the measurement value database 52 can store the data sent from the house H1 as it is, but can also store the result of calculation processing such as integration by the control unit 6. .
- the power price database 53 as the power price storage means stores information on the power price (the power purchase price as seen from the resident side) that changes depending on the time of the day set by the power company that supplies the grid power.
- the precondition that the discharge start time determination system of the present embodiment can be applied is that a contract is made for a charge system in which three or more different power prices are set in one day.
- electricity prices There are three types of electricity prices: the middle price range in the evening from 17:00 to 23:00 and the low price range in the evening from 23:00 (third time) to the next day before 7:00 (first time). Is set.
- the power price database 53 stores the time when the power price switches and the power price in each time zone.
- the power price database 53 also stores a purchase price (a power selling price as viewed from the resident side) at which a power company or the like purchases the power generated by the solar cell panel 1.
- the control unit 6 is provided with a predicting means 61, a comparing means 62 having a first comparing means 621 and a second comparing means 622, and a discharge start time determining means 63.
- the structure provided in this control part 6 becomes a main structure of the discharge start time determination system of the storage battery 2 of this Embodiment.
- the prediction means 61 is a means for predicting the power generation amount of the solar cell panel 1 and the power consumption amount of the house H1 on the day on which it is desired to determine the optimal discharge start time of the storage battery 2. For example, the power generation amount and power consumption on the next day can be predicted on the previous day. In addition, when the discharge start time to be applied in an arbitrary period (1 week, 10 days, 1 month, etc.) is determined by the previous day, an average value corresponding to the arbitrary period can be predicted.
- the prediction by the prediction means 61 is performed based on the measurement values measured by the measurement means 3 and accumulated in the measurement value database 52. A detailed prediction method will be described later.
- FIG. 1 is a diagram for explaining the details of the comparison means 62.
- the dischargeable capacity X of the storage battery 2 can be calculated based on the value stored in the residence information database 51. Usually, in order to extend the life of the storage battery 2, the entire storage capacity is not discharged. Therefore, the dischargeable capacity X shown in FIG. 1 is a capacity that is set to be able to discharge 100%.
- the curves of the photovoltaic power generation amount and the power consumption amount shown in the graph on the left side of FIG. 1 indicate the power generation amount and the power consumption amount predicted by the prediction means 61.
- the amount of power required to be supplied from the grid power network or the storage battery 2 in each time zone indicated by the areas A, B, and C is calculated.
- the power consumption exceeds the amount of power generation, it is necessary to receive power supply from the grid power network or the storage battery 2, so that the power amount becomes the necessary amount (A, B, C) in each time zone.
- This required amount (A, B, C) can be calculated by subtracting the amount of photovoltaic power generation from the amount of power consumption and integrating during the time period. If the amount of photovoltaic power generation is greater than or equal to the power consumption at all times during the time period, the required amount is zero.
- the morning requirement A indicates the amount of power that needs to be supplied in the morning time zone (medium price range) from 7 o'clock to 10 o'clock, when the electricity price is higher than at night.
- the daytime required amount B indicates the amount of power that needs to be supplied in the daytime period (high price range) from 10:00 to 17:00 when the power price is highest during the day.
- the evening required amount C indicates the amount of electricity that needs to be supplied in the evening time zone (medium price range) from 17:00 to before 23:00 when the electricity price is lower than in the daytime.
- the calculation so far corresponds to step S1 of the flowchart shown on the right side of FIG.
- the first comparison means 621 compares the dischargeable capacity X with the daytime and evening required amounts (B, C) (step S2). In other words, the first comparison means 621 discharges the sum of the daytime requirement amount B in the daytime period when the power price is the highest and the evening requirement amount C in the following evening time period as the high price hourly requirement amount (B + C). Compare with possible capacity X.
- the second comparison means 622 determines the high price required amount from the dischargeable capacity X.
- a surplus discharge amount Y obtained by subtracting (B + C) is calculated (step S3).
- step S4 the morning required amount A in the morning time zone is compared with the marginal discharge amount Y as the required amount at the middle price. As a result of this comparison, if it is determined that only the required amount (A) at the middle price can be supplied with the surplus discharge amount Y (A ⁇ Y), any of the middle price range from 7:00 to before 10:00 Is determined as the discharge start time (step S6). In this step S6, 8-9 o'clock is determined as the discharge start time.
- step S11 the measurement means 3 of the house H1 measures the power generation amount of the solar panel 1 and the power consumption of the house H1, which is the power consumption of all the power load devices installed in the house H1.
- the measurement value is accumulated at least over a period (for example, one month) to be compared. That is, in step S11, the measured value measured in the house H1 in N-1 month (previous month) is stored in the measured value database 52.
- step S12 it is determined whether or not there are measurement values for the past year of the house H1.
- the measured value of N month of the previous year is As it is, it is used as a predicted value of the power generation amount and the power consumption amount for this month (N month) of this year (step S14).
- step S15 when the house H1 is newly built or when the measuring means 3 is just installed, measured values for the past year are not accumulated. Therefore, comparison with other residences is performed in step S15.
- the management server 5 is connected to many houses H2,..., HX in addition to the house H1 to be processed. And since the measurement means 3, ... are installed in these houses H2, ..., HX respectively, those measurement values are stored in the measurement value database 52.
- step S16 From the measured values measured in the previous month (N-1 month) in the houses H2,..., HX, the same as the measured value in the previous month (N-1 month) of the house H1 to be processed or A house where a similar measurement value is measured is extracted as a similar house (step S16).
- step S15 to S17 The processing from step S15 to S17 described above is the same or similar when the measured value of the previous month (N-1 month) is compared with the measured value of N-1 month one year ago in step S13. It is also performed when it is determined that it cannot be said.
- the processing in the above steps is the prediction by the prediction means 61. Then, the optimum discharge start time is determined using the predicted power generation amount and power consumption amount of the house H1 in the current month of January (step S18).
- FIG. 6 illustrates the predicted power generation amount and power consumption prediction value of the solar cell panel 1 predicted by the prediction means 61. That is, in the second column from the left of the table in FIG. 6, the average value of the power consumption of the house H1 in the current month N (current month) is shown as a predicted value for each hour. Moreover, the average value of the electric power generation amount of the N month (this month) of the solar cell panel 1 is shown for every time as a predicted value in the column next to it.
- the determination result calculated in this way is output as the optimum discharge start time as shown in step S19 of FIG. That is, the determination result by the discharge start time determining unit 63 is sent from the control unit 6 to the display monitor 4 of the house H1 via the communication unit 71 and displayed as shown in FIG.
- FIG. 7 is a diagram showing an example of the display result of the display monitor 4. Here, the current discharge start time (8:00 am) of the storage battery 2 and the state (good) of the storage battery 2 are shown, and the discharge start time at which the power rate is the cheapest is “10 am” It is displayed.
- the resident who sees the display on the display monitor 4 can change the discharge start time of the storage battery 2 to 10:00 am if he wants to reduce the power charge as much as possible.
- the system for determining the discharge start time of the storage battery 2 of the present embodiment configured as described above has a high-price required amount (B + C) in a time zone where the power price calculated by the subtraction process is high and the dischargeable capacity X of the storage battery 2. And the discharge start time is advanced when there is a remainder in the dischargeable capacity X.
- the storage battery 2 is charged at a time when the power price is low (low price range) and the charged power is discharged at a time when the power price is high (high price range) or an intermediate time zone (medium price range). By using it, the electricity charge of the house H1 can be reduced.
- the optimal discharge start time may change.
- the optimal discharge start time may change when the season, family structure, electricity price system, etc. change. For this reason, the electric charge of the house H1 can be reduced by reviewing the optimal discharge start time from time to time or periodically. And the determination result by the discharge start time determination system of the storage battery 2 of this Embodiment becomes a suitable determination material of a resident.
- the prediction accuracy is improved by performing the prediction based on the measurement values of the same or similar other houses H2, ..., HX. Can be increased.
- the user can easily discharge more appropriately. This can lead to optimal discharge.
- the charge system in which three different power prices exist in the day has been described as an example, but the present invention is not limited to this.
- the power price and the switching time described in the above embodiment are examples, and the time when the power price changes and the number of time zones where the price is different are the management policy of the company that supplies the grid power, such as the power company, It changes depending on the policy.
- the said embodiment demonstrated the case where the determination result of the discharge start time transmitted via the communication part 71 of the management server 5 was displayed on the display monitor 4, it is not limited to this, Electronic It can also be displayed on the screen of a mobile phone or computer via email. The resident can also know the determination result by browsing a predetermined Web page.
- the prediction unit 61 that performs prediction based on the measurement value measured by the measurement unit 3 of the house H1 has been described.
- the prediction unit 61 is not limited to this, and is obtained from existing statistical data. The average value obtained can also be used as the predicted value.
- the said embodiment demonstrated only the display result of the determination by the discharge start time determination means 63 on the display monitor 4, and demonstrated the case where the setting change of the storage battery 2 performed by a resident, it is not limited to this. .
- optimal discharge control can be automatically performed by outputting the determination result of the discharge start time to the control device of the storage battery 2.
Abstract
Description
[関連出願への相互参照]
本出願は、2013年9月6日に日本国特許庁に出願された特願2013-185387に基づいて優先権を主張し、その全ての開示は完全に本明細書で参照により組み込まれる。
Claims (7)
- 太陽光発電装置及び蓄電装置を備えた建物における蓄電装置の放電開始時刻決定システムであって、
前記太陽光発電装置の発電量及び前記建物の電力消費量を予測する予測手段と、
第1時刻以降第2時刻の前までの中価格帯と、第2時刻以降第3時刻の前までの高価格帯と、第3時刻以降翌日の第1時刻の前までの低価格帯と電力価格が異なっており、これらの切り替わり時刻が記憶された電力価格記憶手段と、
前記高価格帯の前記電力消費量から前記発電量を減算した高価格時必要量と前記蓄電装置の放電可能容量とを比較する第1比較手段と、
前記第1比較手段によって前記高価格時必要量が前記放電可能容量以上と算定された場合に前記第2時刻を放電開始時刻とし、前記高価格時必要量が前記放電可能容量未満と算定された場合に前記第1時刻以降前記第2時刻の前までのいずれかの時刻を放電開始時刻とする放電開始時刻決定手段とを備えたことを特徴とする蓄電装置の放電開始時刻決定システム。 - 前記第1比較手段によって前記高価格時必要量が前記放電可能容量未満と算定された場合に、前記放電可能容量から前記高価格時必要量を減算した余裕放電量と前記中価格帯の前記電力消費量から前記発電量を減算した中価格時必要量とを比較する第2比較手段を備え、
前記放電開始時刻決定手段では、前記第2比較手段によって前記中価格時必要量が前記余裕放電量未満と算定された場合に前記第1時刻を放電開始時刻とし、前記中価格時必要量が前記余裕放電量以上と算定された場合に前記第1時刻より遅い前記第2時刻の前までのいずれかの時刻を放電開始時刻とすることを特徴とする請求項1に記載の蓄電装置の放電開始時刻決定システム。 - 前記太陽光発電装置の発電量及び前記建物の電力消費量を計測する計測手段を備え、
前記予測手段による予測は、前記計測手段による計測値に基づいて行われることを特徴とする請求項1又は2に記載の蓄電装置の放電開始時刻決定システム。 - 前記予測手段による予測は、比較対象とする期間の前記計測手段による計測値と同一又は類似する計測値が得られた別の建物における計測値に基づいて行われることを特徴とする請求項3に記載の蓄電装置の放電開始時刻決定システム。
- 前記放電開始時刻決定手段による判定結果が、表示装置又は印刷装置に出力されることを特徴とする請求項1乃至4のいずれか1項に記載の蓄電装置の放電開始時刻決定システム。
- 前記放電開始時刻決定手段による判定結果が、前記蓄電装置の制御をおこなう制御装置に出力されることを特徴とする請求項1乃至5のいずれか1項に記載の蓄電装置の放電開始時刻決定システム。
- 第1時刻以降第2時刻の前までの中価格帯と、第2時刻以降第3時刻の前までの高価格帯と、第3時刻以降翌日の第1時刻の前までの低価格帯と電力価格が異なっている場合に、太陽光発電装置及び蓄電装置を備えた建物における蓄電装置の放電開始時刻の決定方法であって、
前記太陽光発電装置の発電量及び前記建物の電力消費量を予測する予測ステップと、
前記高価格帯の前記電力消費量から前記発電量を減算した高価格時必要量と前記蓄電装置の放電可能容量とを比較する第1比較ステップと、
前記第1比較ステップにおいて前記高価格時必要量が前記放電可能容量以上と算定された場合に前記第2時刻を放電開始時刻とし、前記高価格時必要量が前記放電可能容量未満と算定された場合に前記第1時刻以降前記第2時刻の前までのいずれかの時刻を放電開始時刻とする放電開始時刻決定ステップとを備えたことを特徴とする蓄電装置の放電開始時刻の決定方法。
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EP14841771.0A EP3043446A4 (en) | 2013-09-06 | 2014-08-26 | Discharge start time determination system for electricity storage device and discharge start time determination method for electricity storage device |
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CN105938579A (zh) * | 2016-04-14 | 2016-09-14 | 南京南瑞继保电气有限公司 | 一种基于峰谷分时电价的钢铁企业富余煤气优化调度方法 |
JP6680606B2 (ja) * | 2016-04-22 | 2020-04-15 | 積水化学工業株式会社 | 電力制御システムおよび電力制御方法 |
FR3060889B1 (fr) * | 2016-12-21 | 2020-12-04 | Commissariat Energie Atomique | Procede et dispositif de charge d'une batterie |
KR101956791B1 (ko) * | 2018-11-29 | 2019-03-14 | 주식회사 주빅스 | 전기요금 누진제를 고려한 주택용 태양광 발전 제어장치 |
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