WO2014136353A1 - エネルギーマネジメントシステムおよびエネルギーマネジメント方法 - Google Patents
エネルギーマネジメントシステムおよびエネルギーマネジメント方法 Download PDFInfo
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- WO2014136353A1 WO2014136353A1 PCT/JP2013/083707 JP2013083707W WO2014136353A1 WO 2014136353 A1 WO2014136353 A1 WO 2014136353A1 JP 2013083707 W JP2013083707 W JP 2013083707W WO 2014136353 A1 WO2014136353 A1 WO 2014136353A1
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- storage battery
- power
- demand
- index value
- energy management
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00018—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using phone lines
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Definitions
- the present invention relates to a technique for controlling charge / discharge of a storage battery.
- Demand response is an electricity rate signal indicating that a peak hour rate (CPP: Critical Peak Pricing) higher than usual is collected as an electricity rate during times when power supply and demand are expected to be tight, and to request power saving Demand response signals, such as power saving commands, are notified to consumers, and by changing the temperature setting of the air conditioner and the brightness of the lighting equipment to the consumers, the power consumption of the electrical equipment is reduced and the tight supply and demand of power is avoided.
- CPP Critical Peak Pricing
- lithium ion storage batteries represented by lithium ion storage batteries
- large-capacity storage batteries have begun to spread to homes and the like.
- lithium ion batteries are applied to electric vehicles, further cost reduction by mass production will be realized in the future with the popularization of electric vehicles, and as a result, lithium batteries will be more widely used in homes. It is expected.
- Large-capacity storage batteries in homes are generally used to store the power generated by power plants such as solar power generators, used as auxiliary power supplies during commercial power outages, Used to save money.
- the storage battery is controlled to be charged with electric power generated by a power generation facility such as commercial power or a solar power generation device and discharged at another time.
- a power generation facility such as commercial power or a solar power generation device
- storage batteries can be charged during commercial power transmission and discharged during a power outage, or can be charged during times when the electricity rate is low in the hourly rate system and discharged during times when the electricity rate is high. It is controlled (see Patent Document 1).
- the above-mentioned technology for controlling charging / discharging of a large-capacity storage battery is applied to demand response, charging the storage battery during a time when the demand for commercial power is small, and discharging the storage battery during a time when the demand for commercial power is large
- the demand for commercial power can be apparently reduced, so that it is possible to suppress the tight supply and demand of power without changing the preset temperature of the air conditioner or the brightness of the lighting equipment. Therefore, since comfort is not impaired, it is possible to reduce the demand response not being used or the demand response being canceled halfway, and the power system can be stably operated.
- FIG. 13 is a diagram showing electricity charges by time period in consideration of peak time period charges.
- the electricity rate is set so as to increase in the time zone in which the demand for commercial power increases, and the electricity rate in the time zone from 12:00 to 22:00 is the highest peak time zone fee. .
- FIG. 14 is a diagram illustrating a simulation result of calculating a change in demand for commercial power when charging / discharging of a storage battery installed in each of a plurality of consumers is controlled according to a demand response signal.
- each storage battery is charged at a time when the electricity rate from midnight to dawn is low, and discharged at a time when the electricity rate is high from day to night. .
- the electricity rate is set to be higher in the time zone when the demand for commercial power is higher, the storage battery is charged in the time zone when the demand for commercial power is small, and the time when the demand for commercial power is large In the band, the storage battery is discharged. Therefore, the demand for commercial power is leveled, and it becomes possible to suppress the tight supply and demand of power.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide an energy management system and an energy management method capable of improving the supply and demand balance of electric power.
- the energy management system receives a control signal indicating a storage battery connected to a power line that transmits external power, and a suppression time zone for suppressing consumption of the external power by a load connected to the power line, and And a controller that acquires an index value correlated with the demand for the external power and adjusts a charge / discharge amount charged / discharged by the storage battery based on the control signal and the index value.
- the energy management system method receives a control signal indicating a suppression time zone for suppressing consumption of the external power by a load connected to a power line transmitting external power, and is correlated with the demand for the external power.
- FIG. 1 is a diagram showing a demand response system according to the first embodiment of the present invention.
- the demand response system includes a demand response signal transmission system 11 and an energy management system 21.
- the demand response signal transmission system 11 and the energy management system 21 are communicably connected to each other via a public communication network 31 (thick line).
- the energy management system 21 is used by a consumer who is generated at the power plant 41 and supplied with electric power. Moreover, the consumer has the consumer apparatus 43 connected to the power line 42 (broken line) which transmits the electric power generated in the power plant 41 as external power.
- the consumer device 43 is a load that consumes power transmitted through the power line 42, and is, for example, an electrical device such as an air conditioner, a heat pump water heater, and a refrigerator. Although only one consumer device 43 is shown in FIG. 1, there may actually be a plurality of customer devices 43.
- the demand response signal transmission system 11 transmits a demand response signal, which is a control signal indicating a suppression time zone for suppressing consumption of external power by the consumer device 43, to the energy management system 21 via the public communication network 31.
- the suppression time zone is, for example, a time zone in which the occurrence of tight power supply and demand is expected. In addition, the suppression time zone may change every day or every season.
- the energy management system 21 includes a thermometer 51, a storage battery 52, a watt-hour meter 53, and a storage battery controller 54.
- the thermometer 51 is a measuring device that measures the temperature as an index value correlated with the power demand that is the demand for external power.
- the thermometer 51 shall be installed outdoors and shall measure the outdoor temperature which is the outdoor temperature.
- FIG. 2 is a diagram for explaining the correlation between power demand and outside air temperature.
- a demand curve 61 (thin line) representing fluctuations in power demand and an air temperature curve 62 (thick line) representing changes in outside air temperature are shown.
- the demand curve 61 is the electricity demand in September 2010 that is actually provided by TEPCO (http://www.tepco.co.jp/forecast/html/images/juyo-2010.csv
- the temperature curve 62 is based on the actual temperature in September 2010 in Tokyo (http://www.data.jma.go.jp/obd/stats/ It is created based on etrn / index.php).
- the storage battery 52 is connected to the power line 42 and charges / discharges the power line 42.
- the charge / discharge amount that the storage battery 52 charges and discharges is adjusted by the storage battery controller 54 as described later.
- the storage battery 52 is, for example, a lithium ion battery.
- the watt-hour meter 53 measures the amount of power that is the value of the power transmitted through the power line 42.
- the watt-hour meter 53 includes a watt-hour meter 53-1 that measures the amount of power input / output to / from the consumer, a watt-hour meter 53-2 that measures the charge / discharge amount of the storage battery 52, And a watt hour meter 53-3 for measuring the amount of power supplied to the consumer device 43.
- the storage battery controller 54 is a control unit that controls the energy management system 21.
- the storage battery controller 54 receives a demand response signal from the demand response signal transmission system 11 via the public communication network 31. In addition, the storage battery controller 54 acquires the outside air temperature that is an index value from the thermometer 51.
- the storage battery controller 54 adjusts the charge / discharge amount of the storage battery 52 based on the demand response signal and the outside air temperature. Specifically, the storage battery controller 54 charges the storage battery 52 in a time zone other than the suppression time zone indicated by the demand response signal, and discharges the storage battery with a discharge amount corresponding to the outside air temperature in the suppression time zone. At this time, in the suppression time zone, the storage battery controller 54 increases the discharge amount based on the outside air temperature as the power demand expected according to the outside air temperature is higher. The storage battery controller 54 may adjust not only the charge / discharge amount of the storage battery 52 based on the demand response signal and the outside air temperature, but also the charge / discharge amount of the storage battery 52 according to an instruction from the consumer.
- the demand response signal transmission system 11 transmits a demand response signal to each of the energy management systems 21 provided in each consumer.
- the demand response signal transmission system 11 transmits, as a demand response signal, an electricity bill signal indicating a suppression time zone and an electricity bill to the energy management system 21 via the public communication network 31.
- the demand response signal transmission system 11 shall transmit an electricity bill signal regularly (for example, every day).
- FIG. 4 is a diagram showing an example of an electricity bill signal.
- the electricity bill signal indicates the electricity bill for each time zone.
- the electricity charge (Low) in the time zone from 0:00 to 8:00 the electricity charge (Middle) in the time zone from 8:00 to 12:00 and from 22:00 to 24:00, and from 12:00 to 22:00 Electricity charges (High) in the time period up to are increasing in order.
- the suppression time zone is the time zone with the highest electricity rate (from 12:00 to 22:00), and the electricity rate signal indicates the time zone with the highest electricity rate as the suppression time zone.
- the way of indicating the suppression time zone by the electricity rate signal is not particularly limited.
- the electricity rate signal indicates a suppression time zone using a number such as “zero yen” that is not used for the electricity rate.
- the electricity rate signal indicates a suppression time zone using a character string other than a numeric string indicating the electricity rate.
- the storage battery controller 54 of the energy management system 21 receives the electricity charge signal from the energy management system 21, the storage battery controller 54 acquires the outside air temperature from the thermometer 51, and calculates the charge / discharge amount of the storage battery 52 based on the electricity charge signal and the outside air temperature. adjust.
- the storage battery controller 54 charges the storage battery 52 in a time zone other than the suppression time zone indicated by the electricity rate signal, and discharges the storage battery with a discharge amount corresponding to the outside air temperature in the suppression time zone.
- the storage battery controller 54 uses the following formula (1) to charge / discharge the storage battery 52. the P1, adjusted to be proportional to the difference between the outside air temperature T out and the reference temperature T0.
- the proportionality coefficient ⁇ is a positive value parameter. Further, the storage battery 52 is charged when the charge / discharge amount P1 is positive, and the storage battery 52 is discharged when the charge / discharge amount P1 is negative.
- FIG. 5 is a diagram for explaining the effect of the present embodiment.
- the change in the outside air temperature is represented by the air temperature curve 62 shown in FIG. 2.
- the air temperature curve 62 (thin line) and the storage battery controller 54 charge / discharge the storage battery 52 using the equation (1).
- a demand curve 63 (thick line) representing a change in power demand when the amount is adjusted is shown.
- variation of the demand for electric power in case the storage battery controller 54 is not adjusting the charging / discharging amount of the storage battery 52 shall be represented by the demand curve 61 shown in FIG.
- the outside air temperature differs for each consumer, but here it is assumed that the outside air temperature indicated by the temperature curve 62 has been measured for all the consumers.
- the storage battery 52 is actually controlled for each consumer, it is assumed here that the same control is performed on all the storage batteries 52. In this case, the maximum charge / discharge amount is 4800 kW and the total capacity is 14400 kWh.
- the peak of the power demand is reduced by an appropriate amount, and accordingly, the storage battery 52 is charged at night when the electricity bill is cheap.
- the bottom of power demand has increased by a moderate amount, and power demand has been leveled overall.
- the reference temperature T0 is a value in the room temperature range that people feel comfortable (approximately around 25 ° C.), and the proportionality coefficient ⁇ is the ratio of the amount of discharge that is actually desired to be discharged to the maximum output of the storage battery (that is, the power demand). How much you want to decrease). For this reason, although the reference temperature T0 and the proportionality coefficient ⁇ may be determined in advance, the above ratio may change depending on the situation, so the past demand curve, the past temperature curve, and the predicted temperature of the next day It is desirable to be determined based on the demand curve of the next day predicted from the above. Moreover, the reference temperature T0 and the proportionality coefficient ⁇ may be determined by the storage battery controller 54 or may be determined by the demand response signal transmission system 11.
- the demand response signal transmission system makes the electricity rate signal further indicating the determined reference temperature T0 and the proportional coefficient ⁇ to the storage location controller 54, and the storage battery controller 54 calculates the reference temperature T0 and the proportionality factor ⁇ from the electricity rate signal. get.
- the summer was taken as an example, but in the winter, the peak of the outside temperature and the peak of power demand have a different correlation from the summer (the lower the outside temperature, the higher the power demand). It will be.
- the storage battery controller 54 adjusts the charge / discharge amount of the storage battery 52 using an expression in which the sign before the proportionality coefficient in the expression (1) is changed to positive.
- the storage battery controller 54 has acquired the outside temperature actually measured by the thermometer 51 as an index value, the outside temperature may be acquired by another method.
- the electricity rate signal that is a demand response signal may further indicate the outside temperature in the suppression time zone, and the storage battery controller 54 may acquire the outside temperature from the received electricity rate signal.
- the outside temperature indicated by the electricity rate signal is, for example, a predicted temperature in a region where a customer exists.
- FIG. 6 is a diagram showing an example of an electricity bill signal indicating the temperature.
- the electricity bill in the suppression time zone changes according to the outside air temperature
- the electricity bill signal indicates the outside air temperature using the electricity bill.
- the storage battery controller 54 holds a table indicating the relationship between the electricity rate and the outside temperature, formula information indicating a formula for converting the electricity rate to the outside temperature, and the like.
- the outside air temperature is acquired by converting the electricity rate indicated by the electricity rate signal in the suppression time zone into the outside temperature. It should be noted that the electricity bill may change according to the outside air temperature even in a time zone other than the suppression time zone.
- the charge / discharge amount of the storage battery 52 is adjusted based on the demand response signal indicating the suppression time zone and the outside air temperature that is an index value correlated with the power demand. It is possible to suppress a sudden increase in the charge / discharge amount at the start time of the suppression time zone while lowering the power demand in the suppression time zone. For this reason, it becomes possible to improve the supply and demand balance of external power.
- the storage battery 52 is charged in a time zone other than the suppression time zone, and the storage battery 52 is discharged with a discharge amount based on the outside air temperature in the suppression time zone. For this reason, the amount of charge / discharge suddenly increases at the start time of the suppression time zone while arousing power demand in times other than the suppression time zone where power demand is low and reducing the power demand in the suppression time zone Can be suppressed. For this reason, it is possible to further improve the supply and demand balance of external power.
- the amount of discharge increases as the power demand expected according to the outside air temperature increases in the suppression time zone, so that it is possible to further improve the supply and demand balance of external power.
- the outside temperature is acquired from the thermometer 51 or the demand response signal.
- the outside temperature is acquired from the thermometer 51, it is possible to acquire a highly accurate index value.
- the outside temperature is acquired from the demand response signal, it is not necessary to provide the thermometer 51. Reduction can be achieved.
- the outside air temperature is used as an index value for adjusting the charge / discharge amount of the storage battery 52.
- the index value is not limited to the outside air temperature as long as the index value has a correlation with the power demand. Other values may be used.
- the index value may be different depending on the time and the time zone. For example, the amount of solar radiation may be used as an index value during the daytime in winter. In addition, as long as quantification is possible, the index value may be a person's propensity to use power.
- the power consumption consumed by a predetermined electrical device is used as the index value.
- the predetermined electrical device is not particularly limited as long as the amount of power consumption correlates with the demand power, but in the present embodiment, it is assumed to be an air conditioner.
- the air conditioner includes a heat source, and controls the output heat amount of the heat source so that the indoor temperature becomes a set value. For example, in summer, the air conditioner consumes electric power because it drives the heat source and sends cool air into the room when the room temperature is higher than a set value. At this time, the higher the outdoor temperature, the more the heat diffuses from the outdoor to the indoor and the indoor temperature rises. Therefore, in order to set the indoor temperature to the set value, the higher the outdoor temperature, You have to increase your ability. Therefore, the higher the outdoor temperature, the higher the power consumption of the air conditioner. Therefore, there is a positive correlation between the outdoor temperature and the power consumption of the air conditioner. For this reason, there is a positive correlation between the power demand and the power consumption of the air conditioner, and the power consumption of the air conditioner can be used as an index value.
- the above heat balance model can be expressed by the following differential equation (2).
- the model of this heat balance is “Miyanaga et al.,” Practical application of residential indoor thermal environment design tool, Part 1: Simultaneous calculation method of multiple room air conditioning load and thermal comfort index, ”Central Research Institute of Electric Power, Central Research Institute of Electric Power. Report R06016, p. 3 (http://criepi. Cincinnati.or.jp/jp/kenkikaku/report/detail/R06016.html) ”.
- Equation 2 C D is the sensible heat capacity of indoor air
- A is the area of the building
- R is the thermal resistance of the building
- T r is the room temperature in the building
- T out is the outdoor temperature
- Q is the heat source of the air conditioner. Represents the amount of output heat.
- the time response of the output heat quantity Q is obtained from Expression (2) by calculating the output heat quantity Q such that the room temperature Tr becomes a set value by using a method such as PID (Proportional Integral Derivative Controller) control.
- PID Proportional Integral Derivative Controller
- the air conditioner is a heat exchange type air conditioner
- the value obtained by dividing the exchange heat quantity, which is the output heat quantity Q of the heat source, by the COP (Coefficient Of Performance) value, which is a coefficient of performance, is obtained as the power consumption PAC of the air conditioner. .
- FIG. 7 is a diagram showing the relationship between the power consumption of the air conditioner and the outdoor temperature in the heat balance model.
- the air conditioner uses electric power to generate cold air, so the power consumption of the air conditioner increases. Therefore, the higher the outdoor temperature, the higher the power consumption of the air conditioner.
- FIG. 8 is a diagram showing the energy management system of the present embodiment.
- the air conditioner 81 is installed in the consumer as the consumer equipment 43 in FIG. 1, and the energy management system has no thermometer 51 and the amount of electric power compared to the energy management system 21 shown in FIG.
- the total 53 differs in that it has a watt-hour meter 53-4 which is a measuring device for measuring the power consumption of the air conditioner 81 as an index value.
- the storage battery controller 54 receives the electricity rate signal and acquires the power consumption of the air conditioner from the watt hour meter 53-4. Then, the storage battery controller 54 adjusts the charge / discharge amount of the storage battery 52 based on the electricity rate signal and the power consumption amount.
- the storage battery controller 54 receives the electricity charge signal shown in FIG. 4 and, based on the electricity charge signal, the storage battery 52 is fully charged in the time zone from 0:00 to 8:00 when the electricity charge is the lowest. Then, the storage battery 52 is charged, and the discharge amount of the storage battery 52 is adjusted to a value obtained by multiplying the power consumption amount of the air conditioner 81 by the proportional coefficient ⁇ in the time zone from 12:00 to 22:00 which is the suppression time zone.
- FIG. 9 is a diagram showing fluctuations in the charge / discharge power amount of the storage battery 52 when the proportionality coefficient ⁇ is 1.
- the change in the outside air temperature is represented by the air temperature curve 62 in FIG. 2, and the air temperature curve 62 (thick line) and the charge / discharge power curve 65 (thin line) representing the fluctuation of the charge / discharge power amount of the storage battery 52. ) And is shown.
- the higher the power demand the higher the discharge amount of the storage battery 52.
- 10 to 12 show that there are 2400 consumers, the same air conditioner 81 is installed in each customer, and the storage battery 52 installed in each customer assuming that the outside air temperature of each customer is the same. It is a figure which shows the fluctuation
- Demand curves 67 to 69 representing fluctuations in power demand in the case are shown.
- the maximum output which is the total value of the maximum charge / discharge amount of each storage battery 52
- the total capacity which is the total value of the capacity of each storage battery 52
- the demand curve 67 in FIG. 10 shows the fluctuation in power demand when the proportionality coefficient ⁇ is 10/24
- the demand curve 68 in FIG. 11 shows the fluctuation in power demand when the proportionality coefficient ⁇ is 30/24
- FIG. The demand curve 69 represents the fluctuation of the power demand when the proportionality coefficient ⁇ is 50/24.
- each consumer has the same air conditioner 81 and the storage battery controller 54 has performed the same operation at the same outdoor temperature.
- the storage battery controller 54 has acquired the power consumption actually measured by the watt hour meter 53-4 as an index value, the power consumption may be acquired by another method.
- the electricity charge signal further indicates the amount of power consumption in the suppression time zone, and the storage battery controller 54 acquires the amount of power consumption from the received electricity charge signal.
- the electricity rate signal indicates the amount of electricity consumed using the electricity rate as in the electricity rate signal shown in FIG.
- the power consumption amount is acquired from the electricity rate signal using a table indicating the relationship between the electricity rate and the power consumption amount.
- the power consumption amount indicated by the electricity rate signal is, for example, the measurement of the power consumption amount of the air conditioner 81 of one or more consumers represented by the demand response signal transmission system 11 among the consumers having the air conditioner 81.
- the value can be obtained and obtained as a value obtained by multiplying the measured value or the average value of the measured values by ⁇ .
- the electricity bill indicated by the electricity bill signal does not take into account the electricity bill for the power sold to the power company in the restricted time zone. For this reason, after the end of the restraint time period, it may be separately liquidated so that the amount of power purchased by the power company is fairly distributed to each consumer.
- the present embodiment based on the electricity rate signal indicating the suppression time zone and the power consumption of the electrical device as an index value correlated with the power demand. Since the charge / discharge amount of the storage battery 52 is adjusted, it is possible to suppress a sudden increase in the charge / discharge amount at the start time of the suppression time zone while lowering the power demand in the suppression time zone. For this reason, it becomes possible to improve the supply and demand balance of external power.
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- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
Description
21 エネルギーマネジメントシステム
31 公衆通信網
41 発電所
42 電力線
43 需要家機器
51 気温計
52 蓄電池
53-1~53-4 電力量計
54 蓄電池コントローラ
61、63、66~69 需要曲線
62 気温曲線
64 消費電力量曲線
65 充放電電力曲線
81 空調機
Claims (9)
- 外部電力を伝送する電力線に接続された蓄電池と、
前記電力線に接続された負荷による前記外部電力の消費量を抑制する抑制時間帯を示す制御信号を受信し、また、前記外部電力の需要と相関のある指標値を取得し、前記制御信号および前記指標値に基づいて、前記蓄電池にて充放電される充放電量を調整する制御部と、を有するエネルギーマネジメントシステム。 - 前記制御部は、前記抑制時間帯以外の時間帯に、前記蓄電池を充電させ、前記抑制時間帯に、前記蓄電池を、前記指標値に基づいた放電量で放電させる、請求項1に記載のエネルギーマネジメントシステム。
- 前記制御部は、前記抑制時間帯には、前記指標値に基づいて、前記需要が高くなるほど前記放電量を高くする、請求項2に記載のエネルギーマネジメントシステム。
- 前記制御部は、前記指標値として、外気温または所定の電気機器にて消費される消費電力量を取得する、請求項1ないし3のいずれかに記載のエネルギーマネジメントシステム。
- 前記所定の電気機器は、空調機である、請求項4に記載のエネルギーマネジメントシステム。
- 前記指標値を計測する計測装置をさらに有し、
前記制御部は、前記計測装置から前記指標値を取得する、請求項1ないし5のいずれか1項に記載のエネルギーマネジメントシステム。 - 前記制御信号は、前記抑制時間帯における前記指標値をさらに示し、
前記制御部は、前記制御信号から前記指標値を取得する、請求項1ないし5のいずれか1項に記載のエネルギーマネジメントシステム。 - 前記制御信号は、前記指標値に応じて変化する電気料金を用いて前記指標値を示す、請求項7に記載のエネルギーマネジメントシステム。
- 外部電力を伝送する電力線に接続された負荷による前記外部電力の消費量を抑制する抑制時間帯を示す制御信号を受信し、
前記外部電力の需要と相関のある指標値を取得し、
前記制御信号および前記指標値に基づいて、前記電力線に接続された蓄電池にて充放電される充放電量を調整する、エネルギーマネジメント方法。
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