WO2013038482A1 - ピークカット制御装置 - Google Patents
ピークカット制御装置 Download PDFInfo
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- WO2013038482A1 WO2013038482A1 PCT/JP2011/070779 JP2011070779W WO2013038482A1 WO 2013038482 A1 WO2013038482 A1 WO 2013038482A1 JP 2011070779 W JP2011070779 W JP 2011070779W WO 2013038482 A1 WO2013038482 A1 WO 2013038482A1
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- Prior art keywords
- power
- amount
- peak cut
- storage battery
- cut amount
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Definitions
- the present invention relates to a peak cut control device, and more particularly to a peak cut control device in a natural energy power generation system with a storage battery.
- Solar power generation and wind power generation have the advantage of using clean natural energy, but it is difficult to ensure a stable power generation amount depending on natural conditions such as solar radiation and wind conditions.
- the unstable power cannot be directly transmitted to the power network.
- a technology is used in which a storage battery is provided in addition to the power generation apparatus, and a part of the generated output that varies depending on natural conditions is charged and discharged to the storage battery to stabilize the output and transmit power to the power network.
- the difference between the power demand prediction and the purchased power prescribed value is calculated for each time zone, and when the demand prediction is larger than the purchased power prescribed value, the difference is set as the peak power. Then, the peak power in each time zone is integrated to calculate the total peak power. On the other hand, it is determined whether the total amount of peak power is larger than the latest charge power measured by the charger / discharger. If so, the amount of power required for peak cut is calculated before the peak power is generated. Make a plan to charge the storage battery with electricity to ensure Thereby, in the time slot
- the peak cut position is assumed based on the power consumption pattern obtained in advance, and the rated power output of the power generator is assumed based on this. Then, the cost of using the power generation system is calculated through predetermined calculations using the maximum power and peak cut position, power price data, power generation system price data, usage period data, equipment maintenance and repair cost data, etc. Seeking reduction effects and profit effects.
- the assumed rated power output value is changed several times so that the cost reduction effect and profit effect are maximized within the assumed peak cut position range. Furthermore, the assumed peak cut position is changed several times, the rated power generation output and the rated battery capacity suitable for it are obtained, and the peak cut position where the cost reduction effect and the profit effect are maximized is determined. In this way, it is possible to select the most appropriate power generation system for the load used by the power consumer and the load supplied by the power supplier.
- the demand for electric power is predicted in advance to obtain the peak cut amount.
- the difference between the demand prediction and the purchased power prescribed value is calculated. Based on this, the peak cut amount is obtained.
- the peak cut amount that maximizes the cost reduction effect and the profit effect is obtained based on the power consumption pattern of the demand prediction.
- peak cut may not be sufficiently performed only by charging / discharging the storage battery. . Since the amount of peak cut is not calculated in consideration of the vacant capacity and the amount of electricity stored in the storage battery, the available capacity cannot be stored enough in the storage battery due to insufficient free capacity, or the amount of electricity stored is insufficient. This is because the battery may not be sufficiently discharged.
- the generator must be controlled to adjust the amount of generated power.
- a rotating machine such as a wind power generator
- the present invention has been made to solve such a problem, and it is possible to perform peak cut control of electric power by utilizing a storage battery to the maximum extent without depending on a rotating machine of a wind power generator as much as possible.
- the purpose is to do so.
- a difference power between a planned power generation amount determined based on the provisional peak cut amount and a demand prediction power amount predicted power demand every predetermined time is obtained, and the obtained difference power and Comparing the chargeable / dischargeable power per unit time of the storage battery every predetermined time and simulating the increase / decrease of the charge / discharge of the storage battery and the temporary peak cut amount, thereby obtaining the peak cut amount per predetermined time sequentially I am doing so.
- the peak cut amount is obtained in consideration of the chargeable power or dischargeable power per unit time of the storage battery, the peak cut amount that makes the best use of the capacity of the storage battery is obtained. Can be sought. Therefore, during actual operation after simulation, the power generated by the storage battery can be controlled by charging and discharging the storage battery as much as possible by using the capacity of the storage battery to the maximum, and charging and discharging the storage battery. Power peak cut control can be performed without relying on a rotating machine.
- FIG. 1 is a diagram illustrating a configuration example of a storage battery-equipped natural energy power generation system including a peak cut control device according to the present embodiment.
- the storage battery-equipped natural energy power generation system according to this embodiment is a system including a natural energy power generation apparatus and a storage battery that charges and discharges part of the power generated by the natural energy power generation apparatus.
- a wind power generation system is used as an example of a natural energy power generation system.
- the wind power generation system 100 of the present embodiment includes a wind power generation device 101 (corresponding to a natural energy power generation device), a windmill control device 102, a charge / discharge control device 103, an inverter 104, a storage battery 105, and a power generation amount meter. 106, a charge amount meter 107, a peak cut control device 108, and an online control device 109.
- the wind power generation system 100 of the present embodiment is linked to the power company system 201 via the power supply control device 200. Further, the wind power generation system 100 of the present embodiment is connected to the demand prediction system 300.
- the wind power generator 101 is driven by wind power and generates electric power for supplying power to the system 201.
- the wind power generator 101 has a configuration in which a tower portion is built on a pedestal and a propeller type windmill is provided on the top of the tower portion.
- a blade which is a blade (blade) portion of a propeller type windmill, is attached to a rotating shaft via a hub, and is configured to receive wind and rotate together with the rotating shaft.
- a generator is connected to the rotating shaft, and the electric power generated by the generator is configured to be output to the outside of the wind power generator 101 via the power cable.
- the windmill control device 102 controls the rotation of a windmill (rotary machine) included in the wind turbine generator 101.
- the windmill control device 102 controls the amount of power generated by the wind turbine generator 101 by controlling the rotation of the windmill.
- the electric power generated by the wind power generator 101 is supplied to the storage battery 105 via the charge / discharge control device 103 and the inverter 104 or is transmitted to the system 201 via the power supply control device 200.
- the storage battery 105 stores part of the power generated by the wind power generator 101 by charging and discharging.
- the charge / discharge control device 103 controls charge / discharge of the storage battery 105. Basically, when the amount of power generated by the wind turbine generator 101 exceeds the amount of power demanded by the demand prediction system 300, the charge / discharge control device 103 controls the surplus power to be charged in the storage battery 105. Conversely, when the amount of power generated by the wind turbine generator 101 is less than the amount of power demand, control is performed so that the storage battery 105 is discharged in order to compensate for the shortage.
- the inverter 104 performs conversion of the orthogonal flow of power. Specifically, the inverter 104 converts AC power supplied from the charge / discharge control device 103 during charging into DC power and supplies it to the storage battery 105. Further, the inverter 104 converts the DC power supplied from the storage battery 105 during discharging into AC power and supplies the AC power to the charge / discharge control device 103.
- the power supply control device 200 controls the power supplied to the system 201 using the power generated by the wind power generator 101 and the power discharged from the storage battery 105 by the control of the charge / discharge control device 103.
- the power supply control device 200 performs control so that electric power obtained by combining the power generation amount of the wind power generation device 101 and the discharge amount from the storage battery 105 is supplied to the system 201.
- fluctuations in the output power of the wind turbine generator 101 viewed from the grid 201 can be suppressed, and the power supplied to the grid 201 can be uniformly smoothed.
- Demand forecasting system 300 predicts power demand every predetermined time. At the time of executing the simulation for obtaining the peak cut amount, the demand prediction system 300 predicts the power demand for the next day, for example, every predetermined time (for example, 1 minute), and peaks the demand forecast power amount for one day obtained by the prediction.
- the cut control device 108 is supplied.
- the demand prediction system 300 predicts the power demand of the day every predetermined time (for example, 1 second). Then, the demand predicted power obtained by the prediction is sequentially supplied to the online control device 109.
- the power demand can be predicted by applying a known method. The detailed explanation is omitted here.
- the power generation amount meter 106 sequentially detects the amount of power actually generated by the wind power generation device 101 and notifies the online control device 109 of the detected power generation amount.
- the charge amount meter 107 sequentially detects the charge power amount (storage amount) of the storage battery 105 and notifies the online control device 109 of the detected charge power amount.
- the peak cut control device 108 obtains a peak cut amount according to information on power demand and the storage battery 105 (details will be described later) by simulation. In other words, the peak cut control device 108 executes a simulation using information on the next-day demand predicted power amount and the storage battery 105 obtained by the demand prediction system 300, so that the next-day power demand (predicted value) and the storage battery 105 An appropriate peak cut amount according to the state or the like is obtained.
- the online control device 109 On the next day after the simulation by the peak cut control device 108 is performed, the online control device 109 actually operates the wind power generation system 100 and executes the online control, and the peak cut amount obtained on the previous day and the demand prediction.
- the peak cut is executed by controlling charging / discharging of the storage battery 105 using the demand predicted power amount of the day obtained by the system 300.
- the online control device 109 sets the peak cut amount obtained by the simulation of the previous day by the peak cut control device 108 as the planned power generation amount for the day.
- the charge / discharge control is performed so that the surplus power is charged in the storage battery 105.
- the device 103 is controlled.
- the charge / discharge control device 103 is controlled so as to discharge from the storage battery 105 in order to compensate for the insufficient power.
- the amount of charged power (charged amount) of the storage battery 105 is detected by the charge amount meter 107 and the detected amount of charged power is notified to the online control device 109.
- the online control device 109 determines that the charging power amount of the storage battery 105 cannot be charged or discharged as described above because the charging power amount is excessive or insufficient based on the charging power amount of the storage battery 105 notified from the charging amount meter 107. In this case, the amount of power generated by the wind turbine generator 101 is controlled through the windmill controller 102.
- FIG. 2 is a diagram illustrating a functional configuration example of the peak cut control device 108 according to the present embodiment.
- the peak cut control device 108 according to the present embodiment includes, as its functional configuration, a data reading unit 11, a planned power generation amount calculation unit 12, a differential power calculation unit 13, a peak cut amount calculation unit 14, and a peak cut.
- a quantity storage unit 15 is provided.
- the data reading unit 11 reads, from the demand prediction system 300, demand forecast data representing the demand forecast power amount for one day in which the power demand of the next day is forecast every predetermined time (for example, one minute).
- the planned power generation amount calculation unit 12 is based on the demand prediction data read by the data reading unit 11 and the temporary peak cut amount TPC temporarily set by the peak cut amount calculation unit 14, and then the planned power generation amount in the wind turbine generator 101.
- the demand prediction electric energy FLP uses what the data reading part 11 read from the demand prediction system 300 as demand prediction data.
- the peak cut amount calculation unit 14 compares the difference power DP obtained by the difference power calculation unit 13 with the chargeable power PCP or the dischargeable power PDP of the storage battery 105 every predetermined time to charge / discharge the storage battery 105 and By simulating the increase and decrease of the temporary peak cut amount TPC, the peak cut amount PC is obtained every predetermined time. Then, the peak cut amount calculation unit 14 records the obtained peak cut amount PC for each predetermined time in the peak cut amount storage unit 15.
- the rechargeable power PCP indicates power per unit time (instantaneous value) that can be charged to the storage battery 105. This is a concept that is different from the charged electric energy (electric storage amount) RC of the storage battery 105.
- the charged power amount RC indicates the amount of power that is actually stored in the storage battery 105. For example, when the total capacity of the storage battery 105 is 20,000 kWh (for example, 2,000 kW of power per unit time is rated to be able to be discharged for 10 hours) The quantity RC will be 10,000 kWh.
- the chargeable power PCP In contrast, a value of 2,000 kW is the chargeable power PCP. Even if the total capacity of the storage battery 105 is the same 20,000 kWh, the chargeable power PCP is different if the rating is different. For example, if the rating is such that 1,000 kW of power per unit time can be discharged for 20 hours, the chargeable power PCP is 1,000 kW. The same applies to the dischargeable power PDP. That is, the dischargeable power PDP indicates the power (instantaneous value) per unit time that can be discharged from the storage battery 105.
- the peak cut amount calculation unit 14 charges the charging power by charging the storage battery 105 so that the temporary peak cut amount TPC is maximized within a range where the difference power DP obtained by the difference power calculation unit 13 is smaller than the chargeable power PCP.
- the increase in the amount RC and the increase in the temporary peak cut amount TPC are simulated. Further, the peak cut amount calculation unit 14 reduces the charge power amount RC due to the discharge of the storage battery 105 and the temporary peak so that the temporary peak cut amount TPC is minimized within a range where the differential power DP is smaller than the dischargeable power PDP. A reduction in the cut amount TPC is simulated.
- the peak cut amount calculation unit 14 determines the temporary peak cut amount TPC finally obtained by such a simulation as the peak cut amount PC.
- the peak cut amount calculation unit 14 obtains a peak cut amount PC for a predetermined time for one day by repeatedly performing the above-described simulation a plurality of times in a unit in which one day is divided every predetermined time.
- the charge limit CLMh refers to a state where the storage battery 105 has reached the end of charge (a state where the charge energy RC is 100%).
- the discharge limit DLMh refers to a state in which the storage battery 105 has been discharged (a state in which the amount of charge RC is 0%). It should be noted that a margin of about ⁇ 15% is allowed, and the state where the charging power amount RC is 85% may be the charging limit CLMh, and the state where the charging power amount RC is 15% may be the discharging limit DLMh.
- the peak cut amount calculation unit 14 determines that the differential power DP is smaller than the chargeable power PCP and the charge power RC of the storage battery 105 exceeds the charge limit CLMh.
- the increase in the charge power amount RC and the increase in the temporary peak cut amount TPC due to the charging of the storage battery 105 are simulated so that the temporary peak cut amount TPC becomes the maximum within the range.
- the peak cut amount calculation unit 14 minimizes the temporary peak cut amount TPC within a range where the differential power DP is smaller than the dischargeable power PDP and the charge power amount RC of the storage battery 105 does not exceed the discharge limit DLMh.
- the reduction of the charging power amount RC and the temporary peak cut amount TPC due to the discharge of the storage battery 105 are simulated.
- FIG. 3 is a flowchart showing an operation example of simulation performed by the peak cut control device 108 of the present embodiment.
- the flowchart shown in FIG. 3 starts when an operation for instructing the start of the simulation is performed by the user.
- the data reading unit 11 of the peak cut control device 108 reads demand forecast data representing the demand forecast power amount for the next day from the demand forecast system 300 (step S1). At this time, the peak cut control device 108 initializes the value of the lead time t representing the value (minute unit) of the predetermined time when performing the simulation for one day to “1”.
- the peak cut amount calculation unit 14 determines whether or not the differential power DP obtained by the differential power calculation unit 13 is smaller than the chargeable power PCP of the storage battery 105 (step S5).
- the peak cut amount calculation unit 14 determines whether or not the charge power amount RCt at the lead time t calculated as described above exceeds the charge limit CLMh of the storage battery 105, that is, the value of the charge power amount RCt is equal to the charge limit CLMh. It is determined whether or not the value is larger than (step S7). When the charge power amount RCt exceeds the charge limit CLMh, the charge cut power PCP condition is satisfied, but the actual capacity of the storage battery 105 is insufficient and charging is not possible. Increases the value of the temporary peak cut amount TPC by the predetermined power amount Pstep (step S8), and returns to the process of step S2.
- the peak cut amount calculation unit 14 increases the value of the temporary peak cut amount TPC by the predetermined power amount Pstep (step S8), and returns to the process of step S2.
- step S7 when the peak cut amount calculation unit 14 determines in step S7 that the charge power amount RCt at the lead time t does not exceed the charge limit CLMh of the storage battery 105, the peak cut amount calculation unit 14 The provisional peak cut amount TPC is determined as the peak cut amount PC at the lead time t, and is recorded in the peak cut amount storage unit 15 (step S9). Thereafter, the process proceeds to step S15.
- the peak cut amount calculation unit 14 makes the differential power DP smaller than the chargeable power PCP and charges the storage battery 105 at a certain lead time t.
- the increase in the charge power amount RCt and the increase in the temporary peak cut amount TPC due to the charging of the storage battery 105 are simulated so that the temporary peak cut amount TPC becomes the maximum within the range where the power amount RCt does not exceed the charge limit CLMh.
- the peak cut amount calculation unit 14 determines whether or not the differential power DP obtained by the differential power calculation unit 13 is smaller than the dischargeable power PDP of the storage battery 105 (step S10).
- the peak cut amount calculation unit 14 determines whether or not the charge power amount RCt at the lead time t calculated as described above exceeds the discharge limit DLMh of the storage battery 105, that is, the value of the charge power amount RCt is equal to the discharge limit DLMh. It is determined whether or not the value is smaller than (step S12). If the discharge limit DLMh is exceeded, it means that even if the condition of the dischargeable power PDP is satisfied, the remaining charge of the storage battery 105 is actually insufficient and cannot be discharged. The value of the amount TPC is decreased by a predetermined power amount Pstep (step S13), and the process returns to step S2.
- the peak cut amount calculation unit 14 decreases the value of the temporary peak cut amount TPC by the predetermined power amount Pstep (step S13), and returns to the process of step S2.
- step S12 when the peak cut amount calculation unit 14 determines in step S12 that the charge power amount RCt at the lead time t does not exceed the discharge limit DLMh of the storage battery 105, the peak cut amount calculation unit 14 The provisional peak cut amount TPC is determined as the peak cut amount PC at the lead time t and is recorded in the peak cut amount storage unit 15 (step S14). Thereafter, the process proceeds to step S15.
- the peak cut amount calculation unit 14 determines that the differential power DP becomes smaller than the dischargeable power PDP at a certain lead time t and the storage battery 105 is charged.
- the decrease in the charge power amount RCt and the decrease in the temporary peak cut amount TPC due to the discharge of the storage battery 105 are simulated so that the temporary peak cut amount TPC is minimized within a range where the electric energy RCt does not exceed the discharge limit DLMh.
- t 1440
- the peak cut control device 108 obtains a peak cut amount PC every predetermined time (every lead time t) for one day by executing the simulation as described above for each lead time t, and a peak cut amount storage unit Record in 15.
- FIG. 4 is a diagram illustrating an example of the peak cut amount PC for one day obtained by the peak cut control device 108.
- FIG. 5 is a flowchart showing an operation example of online control performed by the online control device 109 according to the present embodiment. The flowchart shown in FIG. 5 starts when an operation for instructing the start of online control is performed by the user.
- the online control device 109 reads the peak cut amount PC obtained on the previous day by the peak cut control device 108 from the peak cut amount storage unit 15, and receives demand prediction data representing the demand prediction power amount on the demand prediction system. Read from 300 (step S21).
- the online control device 109 sets the peak cut amount PC read from the peak cut amount storage unit 15 as the planned power generation amount SGenP on the day, and controls the wind turbine control device 102 according to the planned power generation amount SGenP. Further, the online control device 109 sets the planned power generation amount SGenP set as described above as the actual power generation amount AGenP by the wind power generation device 101, assuming that the wind power generation device 101 generates power as planned (step S22).
- the planned power generation amount SGenP is set as the actual power generation amount AGenP
- the power generation amount detected by the power generation amount meter 106 may be set as the actual power generation amount AGenP.
- the online control device 109 determines whether or not the differential power ADP obtained in step S23 is a positive value (step S24). If the differential power ADP is a positive value, it means that the actual power generation amount AGenP is surplus, and therefore the storage battery 105 is charged in steps S25 to S29. First, the online control device 109 determines whether or not the differential power ADP is smaller than the chargeable power PCP of the storage battery 105 (step S25).
- the online control device 109 controls the charge / discharge control device 103 to charge the storage battery 105 with the differential power ADP (step S26).
- “t / 3600” is multiplied in order to convert the unit of differential power ADP from [kW] to [kWh]. Unlike the simulation, “t / 3600” is multiplied because the online control is performed precisely (with high time resolution) in seconds instead of minutes.
- the online control device 109 determines whether or not the charging power amount RC of the storage battery 105 after charging exceeds the charging limit CLMh of the storage battery 105, that is, the value of the charging power amount RC is larger than the value of the charging limit CLMh. Is determined (step S27). Note that the charge amount RC of the storage battery 105 is detected by the charge amount meter 107. Here, when the charging power amount RC of the storage battery 105 does not exceed the charging limit CLMh, there is no particular problem regarding the charging of the storage battery 105, so the process returns to step S21 and continues online control.
- step S25 when it determines with the difference electric power ADP not being smaller than the rechargeable electric power PCP of the storage battery 105 in the said step S25, it means that the difference electric power ADP cannot be charged to the storage battery 105. Further, even when it is determined in step S27 that the charging power amount RC exceeds the charging limit CLMh, the difference power ADP cannot be charged to the storage battery 105 any more. Therefore, in these cases, the online control device 109 decreases the value of the planned power generation amount SGenP by the predetermined power amount Pstep (step S28), and returns to the process of step S21.
- the peak cut amount PC is obtained by simulation so that the differential power DP is smaller than the chargeable power PCP and the maximum amount of charge power RC of the storage battery 105 does not exceed the charge limit CLMh.
- the peak cut amount PC is used as the planned power generation amount SGenP on that day. Therefore, in most cases, the process does not proceed to step S28.
- the differential power ADP does not become smaller than the chargeable power PCP of the storage battery 105, or the storage battery It can be suppressed that the charge electric energy RC 105 exceeds the charge limit CLMh.
- peak cut can be realized by charging the storage battery 105 without controlling the wind turbine of the wind power generator 101 to adjust the power generation amount.
- step S24 If it is determined in step S24 that the differential power ADP is not a positive value, it means that the actual power generation amount AGenP is insufficient. Therefore, the storage battery 105 is discharged in steps S29 to S31. First, the online control device 109 determines whether or not the differential power ADP is smaller than the dischargeable power PDP of the storage battery 105 (step S29).
- the online control device 109 controls the charge / discharge control device 103 to discharge the differential power ADP from the storage battery 105 (step S30).
- the online control device 109 determines whether or not the charge energy RC of the storage battery 105 after discharging exceeds the discharge limit DLMh of the storage battery 105, that is, the value of the charge energy RC is smaller than the value of the discharge limit DLMh. It is determined whether or not (step S31). If the amount of charge RC does not exceed the discharge limit DLMh, there is no particular problem with respect to the discharge from the storage battery 105, so the process returns to step S21 and continues online control.
- step S29 when it determines with the difference electric power ADP not being smaller than the dischargeable electric power PDP of the storage battery 105 in the said step S29, it means that the difference electric power ADP cannot be discharged from the storage battery 105. Further, even when it is determined in step S31 that the charge power amount RC exceeds the discharge limit DLMh, the difference power ADP cannot be discharged from the storage battery 105 any more. Therefore, in these cases, the online control device 109 increases the value of the planned power generation amount SGenP by the predetermined power amount Pstep (step S32), and returns to the process of step S21.
- the peak cut amount PC is obtained by simulation so that the differential power DP is smaller than the dischargeable power PDP and the charge power amount RC of the storage battery 105 is minimum within a range not exceeding the discharge limit DLMh.
- the peak cut amount PC is used as the planned power generation amount SGenP on that day. Therefore, in most cases, the process does not proceed to step S28.
- the differential power ADP does not become smaller than the dischargeable power PDP of the storage battery 105 or the storage battery. It can be suppressed that the charge electric energy RC 105 exceeds the discharge limit DLMh. Accordingly, peak cut can be realized by discharging the storage battery 105 without adjusting the amount of power generation by controlling the wind turbine of the wind power generator 101.
- the difference power DP between the planned power generation amount SGenP determined based on the temporary peak cut amount TPC and the demand predicted power amount predicted for the power demand every predetermined time is obtained. Then, the obtained differential power DP and the chargeable power PCP or dischargeable power PDP per unit time of the storage battery 105 are compared every predetermined time, and the charge / discharge of the storage battery 105 and the increase / decrease of the temporary peak cut amount TPC are increased.
- the peak cut amount PC for each predetermined time is obtained by simulating.
- the peak cut amount PC is obtained in consideration of the rechargeable power PCP or the dischargeable power PDP per unit time of the storage battery 105. Therefore, the rechargeable power PCP or discharge of the storage battery 105 is obtained.
- the peak cut amount PC using the possible power PDP to the maximum can be obtained. Therefore, at the time of actual online control after simulation, the charge / discharge capacity per unit time of the storage battery 105 is utilized to the maximum, and the power that is excessive or insufficient with respect to the actual demand is controlled by the charge / discharge of the storage battery 105. Therefore, peak cut control of electric power can be performed without depending on the rotating machine of the wind power generator 101 as much as possible.
- the charge energy RC of the storage battery 105 and the charge limit CLMh or discharge limit DLMh of the storage battery 105 are compared at predetermined intervals to simulate the increase / decrease in charge / discharge of the storage battery 105 and the temporary peak cut amount TPC. By doing so, the peak cut amount PC every predetermined time is obtained.
- the peak cut amount PC using the capacity of the storage battery 105 to the maximum can be obtained. Therefore, at the time of the actual online control after the simulation, the capacity of the storage battery 105 can be utilized to the maximum, and the power that becomes excessive or insufficient with respect to the actual demand can be controlled by charging / discharging the storage battery 105. Power peak cut control can be performed without relying on the rotating machine of the power generation apparatus 101.
- the difference power DP and the chargeable power PCP or dischargeable power PDP per unit time of the storage battery 105 are compared, and the charge power amount RC of the storage battery 105 and the charge limit CLMh or discharge limit DLMh are compared.
- An example of performing both of these and simulating has been described. Although only one of the former comparison and the latter comparison may be performed, in order to perform power peak cut control using the storage battery 105 to the maximum without depending on the rotating machine of the wind power generation apparatus 101. Preferably performs both comparisons.
- the peak cut amount PC for the next day is obtained by simulation, but the present invention is not limited to this.
- the peak cut amount PC for one week of the next week may be obtained.
- the planned power generation amount SGenP is obtained by subtracting the temporary peak cut amount TPC from the maximum power consumption MaxP specified from the demand predicted power amount data during the execution of the simulation.
- the method for obtaining the planned power generation amount SGenP is not limited to this.
- the planned power generation amount SGenP may be obtained by a known method using a power generation prediction system that predicts the power generation amount from the wind conditions on the next day.
- the chargeable power PCP and the dischargeable power PDP are fixed values
- the present invention is not limited to this.
- the chargeable power PCP may be changed according to the amount of charge power of the storage battery 105. Specifically, when the storage battery 105 has been charged to near the end of charging, the chargeable power PCP is set smaller than the rating. Further, when the storage battery 105 is discharged to near the end of discharge, the dischargeable power PDP is set smaller than the rating.
- the chargeable power PCP when the chargeable power PCP is 2,000 kW at the rated value, the chargeable power PCP is set to 2,000 kW as rated when the charge power amount is less than 90%. On the other hand, when the charge power amount becomes 90% or more and less than 95%, the chargeable power PCP is lowered to, for example, 1,000 kW. Furthermore, when the amount of charge power is 95% or more and less than 100%, the chargeable power PCP is reduced to, for example, 500 kW, and the chargeable power PCP is set to 0 kW when the storage battery 105 is fully charged.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims (4)
- 自然エネルギー発電装置と上記自然エネルギー発電装置で発電した電力の一部を充放電する蓄電池とを備えた蓄電池併設型の自然エネルギー発電システムにおけるピークカット制御装置であって、
仮ピークカット量に基づき定まる上記自然エネルギー発電装置における計画発電量と、所定時間毎の電力需要を予測した需要予測電力量との差分電力を求める差分電力演算部と、
上記差分電力演算部により求められた差分電力と、上記蓄電池の単位時間当たりの充電可能電力または放電可能電力とを上記所定時間毎に比較して、上記蓄電池への上記差分電力の充放電および上記仮ピークカット量の増減をシミュレートすることにより、上記所定時間毎にピークカット量を求めるピークカット量演算部とを備えたことを特徴とするピークカット制御装置。 - 上記ピークカット量演算部は、上記差分電力が上記充電可能電力より小さくなる範囲内で上記仮ピークカット量が最大となるように上記蓄電池の充電による充電電力量の増加および上記仮ピークカット量の増加をシミュレートするとともに、上記差分電力が上記放電可能電力より小さくなる範囲内で上記仮ピークカット量が最小となるように上記蓄電池の放電による上記充電電力量の減少および上記仮ピークカット量の減少をシミュレートすることにより、上記所定時間毎にピークカット量を求めることを特徴とする請求項1に記載のピークカット制御装置。
- 上記ピークカット量演算部は、上記シミュレートに代えて、上記蓄電池の充電電力量が充電限界を超えない範囲内で上記仮ピークカット量が最大となるように上記蓄電池への上記差分電力の充電による上記充電電力量の増加および上記仮ピークカット量の増加をシミュレートするとともに、上記蓄電池の充電電力量が放電限界を超えない範囲内で上記仮ピークカット量が最小となるように上記蓄電池からの上記差分電力の放電による上記充電電力量の減少および上記仮ピークカット量の減少をシミュレートすることにより、上記所定時間毎にピークカット量を求めることを特徴とする請求項1に記載のピークカット制御装置。
- 上記ピークカット量演算部は、上記シミュレートに代えて、上記差分電力が上記充電可能電力より小さくなり、かつ、上記蓄電池の充電電力量が充電限界を超えない範囲内で上記仮ピークカット量が最大となるように上記蓄電池への上記差分電力の充電による上記充電電力量の増加および上記仮ピークカット量の増加をシミュレートするとともに、上記差分電力が上記放電可能電力より小さくなり、かつ、上記蓄電池の充電電力量が放電限界を超えない範囲内で上記仮ピークカット量が最小となるように上記蓄電池からの上記差分電力の放電による上記充電電力量の減少および上記仮ピークカット量の減少をシミュレートすることにより、上記所定時間毎にピークカット量を求めることを特徴とする請求項1に記載のピークカット制御装置。
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JP2013533365A JP5793572B2 (ja) | 2011-09-13 | 2011-09-13 | ピークカット制御装置 |
MYPI2014000713A MY173475A (en) | 2011-09-13 | 2011-09-13 | Peak-cut control device |
KR1020147003031A KR101797632B1 (ko) | 2011-09-13 | 2011-09-13 | 피크컷 제어 장치 |
ES11872424T ES2845222T3 (es) | 2011-09-13 | 2011-09-13 | Dispositivo de control de corte de pico |
PCT/JP2011/070779 WO2013038482A1 (ja) | 2011-09-13 | 2011-09-13 | ピークカット制御装置 |
CA2847503A CA2847503A1 (en) | 2011-09-13 | 2011-09-13 | Peak-cut control device |
EP11872424.4A EP2757650B1 (en) | 2011-09-13 | 2011-09-13 | Peak-cut control device |
AU2011377128A AU2011377128B2 (en) | 2011-09-13 | 2011-09-13 | Peak-cut control device |
CN201180073106.9A CN103828169B (zh) | 2011-09-13 | 2011-09-13 | 削峰控制装置 |
US14/206,975 US9627910B2 (en) | 2011-09-13 | 2014-03-12 | Peak-cut control device |
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JP6730075B2 (ja) * | 2016-04-26 | 2020-07-29 | 株式会社東芝 | 監視制御装置 |
CN105846461B (zh) | 2016-04-28 | 2022-01-28 | 中国电力科学研究院 | 一种大规模储能电站自适应动态规划的控制方法和系统 |
CN108215872A (zh) * | 2017-12-01 | 2018-06-29 | 国网北京市电力公司 | 电动汽车的充电方法、装置、存储介质和处理器 |
JP6994693B2 (ja) * | 2018-08-28 | 2022-02-04 | パナソニックIpマネジメント株式会社 | 電力制御装置及び電力システム |
EP3624292B1 (en) * | 2018-09-11 | 2021-06-23 | Bayerische Motoren Werke Aktiengesellschaft | Method and control device for operating a stationary, electric energy storage that is provided for an electric consumption unit, like, e.g., a household |
KR102185494B1 (ko) * | 2018-10-08 | 2020-12-02 | 주식회사 시너젠 | 피크컷 제어 방법 및 이를 실행하는 장치 |
CN111913110B (zh) * | 2019-05-10 | 2023-03-14 | 维谛技术有限公司 | 一种市电电池配置评估方法和系统 |
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AU2011377128A1 (en) | 2014-04-17 |
US20140191577A1 (en) | 2014-07-10 |
CN103828169B (zh) | 2017-03-29 |
JPWO2013038482A1 (ja) | 2015-03-23 |
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CN103828169A (zh) | 2014-05-28 |
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