Demand-supply adjustment control device, demand-supply adjustment control method, integrated demand-supply adjustment method, and program

Abstract

To provide a controller that calculates load distribution to a generator with high operating efficiency in response to a provision request for electricity from a supply / demand adjustment market and determines whether or not to submit a bid.SOLUTION: A supply / demand adjustment controller comprises: an acquisition part that acquires a first power required for a power plant having multiple generators and a second power requested from a supply / demand adjustment market; a load distribution part that distributes the total load that is the sum of the first power and the second power to the generators in the descending order of operating efficiency so that the distribution to the generator is as close as possible to a rating load; and a bidding determination part that determines whether or not to bid in response to a request from the supply / demand adjustment market based on whether it is possible to supply the total load.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a supply-demand adjustment control device, a supply-demand adjustment control method, an overall supply-demand adjustment method, and a program.

Background Art

[0002] In a power plant having a plurality of generators, it is required to efficiently operate the plurality of generators according to the load required from a central power supply command center or a supply-demand adjustment market. For example, Patent Document 1 discloses an operation schedule calculation device that ranks the power generation efficiency for each load band representing the output range of a generator and plans to preferentially operate the generator with high power generation efficiency according to the magnitude of the required load.

[0003] Generally, a generator is designed to have the maximum efficiency at its rated output. Even when operating in various load bands, the load band close to the rated value is superior in the economy of operation (referred to as operation efficiency). Therefore, it is preferable for the generator to operate at a load as close to the rated value as possible. Regarding this point, in the technology of Patent Document 1, for example, when two power generation facilities are operating at the rated load and the required load decreases, the control is to adjust the output by reducing the loads of both to operate at a partial load. In this case, the operation efficiency of both generators decreases.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a power plant bids in response to demands from the supply-demand adjustment market, it is preferable to operate the generators by performing load distribution considering the overall operating efficiency of the entire power plant. Further, it is desirable to determine the feasibility of the bid after performing such load distribution.

[0006] The present disclosure provides a supply-demand adjustment control device, a supply-demand adjustment control method, an overall supply-demand adjustment method, and a program that can solve the above problems.

Means for Solving the Problems

[0007] The supply-demand adjustment control device of the present disclosure includes an acquisition unit that acquires a first power required for a power plant having a plurality of generators and a second power required from the supply-demand adjustment market, and combines the first power and the second power. A load distribution unit that distributes the total load to the generators in order from the one with the highest operating efficiency among the plurality of generators so that the load distributed to each generator is as close as possible to the rated load; A bid determination unit that determines whether it is possible to bid in response to the demand from the supply-demand adjustment market based on whether the total load can be supplied; and when the bid determination unit determines that it is possible to bid in response to the demand, an assistance information output unit that outputs information requesting a final confirmation of the feasibility of the bid, and an output unit that transmits information indicating that a bid is made to the supply-demand adjustment market. Based on a database in which the bidding results by load band and time period for past demands from the supply-demand adjustment market are recorded, when power is demanded from the supply-demand adjustment market in the same load band and time period as the load band and time period in which the power plant could bid in the past, it is determined that a bid can be made for the demand. The information requesting the final confirmation includes the magnitude of the load distributed to each of the plurality of generators by the load distribution unit. When there is an input indicating approval of the output final confirmation, the output unit transmits information indicating that a bid is made to the supply-demand adjustment market.

[0008] The supply-demand adjustment method of the present disclosure includes steps of obtaining a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market, and adding the first power and the second power to obtain a total load. Then, the total load is distributed to the generators among the plurality of generators in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load. Based on whether the total load can be supplied, it is determined whether it is possible to bid in response to the request from the supply-demand adjustment market. When it is determined in the determining step that it is possible to bid in response to the request, information requesting a final confirmation of the bidability is output, and information indicating that a bid is made to the supply-demand adjustment market is transmitted. In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time period for past demands from the supply-demand adjustment market are recorded, when power is demanded from the supply-demand adjustment market in the same load band and time period as the load band and time period in which the power plant could bid in the past, it is determined that a bid can be made for the demand. The information requesting the final confirmation includes the magnitude of the load distributed to each of the plurality of generators in the step of distributing the total load. When there is an input indicating approval of the output final confirmation, in the outputting step, information indicating that a bid is made to the supply-demand adjustment market is transmitted.

[0009] The overall supply-demand adjustment method of the present disclosure includes steps of obtaining a first power required for a plurality of power plants and a second power required from a supply-demand adjustment market, and adding the first power and the second power to obtain a total load. Then, the total load is distributed to the generators provided in the plurality of power plants in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load. Based on whether the total load can be supplied, it is determined whether it is possible to bid in response to the request from the supply-demand adjustment market. When it is determined in the determining step that it is possible to bid in response to the request, information requesting a final confirmation of the bidability is output, and information indicating that a bid is made to the supply-demand adjustment market is transmitted. In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time period for past demands from the supply-demand adjustment market are recorded, when power is demanded from the supply-demand adjustment market in the same load band and time period as the load band and time period in which the power plant could bid in the past, it is determined that a bid can be made for the demand. The information requesting the final confirmation includes the magnitude of the load distributed to each of the generators provided in the plurality of power plants in the step of distributing the total load. When there is an input indicating approval of the output final confirmation, in the outputting step, information indicating that a bid is made to the supply-demand adjustment market is transmitted.

[0010] The program of the present disclosure causes a computer to perform steps of: obtaining a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market; distributing the total load obtained by summing the first power and the second power to the generators among the plurality of generators in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load; determining whether it is possible to bid in response to the request from the supply-demand adjustment market based on whether it is possible to supply the total load; when it is determined in the determining step that it is possible to bid in response to the request, outputting information requesting a final confirmation of the bidability; and transmitting information indicating an intention to bid in the supply-demand adjustment market. In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time period for past demands from the supply-demand adjustment market are recorded, when power is demanded from the supply-demand adjustment market in the same load band and time period as the load band and time period in which the power plant could bid in the past, it is determined that a bid can be made for the demand. The information requesting the final confirmation includes the magnitudes of the loads distributed to the respective generators among the plurality of generators in the step of distributing the total load. When there is an input indicating approval of the output final confirmation, the outputting step causes a process of transmitting information indicating an intention to bid in the supply-demand adjustment market to be executed.

[0011] The program of the present disclosure causes a computer to perform steps of: obtaining a first power required for a plurality of power plants and a second power required from a supply-demand adjustment market; distributing the total load obtained by summing the first power and the second power to the generators provided in the plurality of power plants in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load; determining whether it is possible to bid in response to the request from the supply-demand adjustment market based on whether it is possible to supply the total load; when it is determined in the determining step that it is possible to bid in response to the request, outputting information requesting a final confirmation of the bidability; and transmitting information indicating an intention to bid in the supply-demand adjustment market. In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time period for past demands from the supply-demand adjustment market are recorded, when power is demanded from the supply-demand adjustment market in the same load band and time period as the load band and time period in which the power plant could bid in the past, it is determined that a bid can be made for the demand. The information requesting the final confirmation includes the magnitudes of the loads distributed to the respective generators provided in the plurality of power plants in the step of distributing the total load. When there is an input indicating approval of the output final confirmation, the outputting step causes a process of transmitting information indicating an intention to bid in the supply-demand adjustment market to be executed.

Advantages of the Invention

[0012] According to the supply-demand adjustment control device, supply-demand adjustment control method, and program of the present disclosure, it is possible to calculate the load distribution to a generator considering the operation efficiency and determine the admissibility of a bid in response to a power supply request from the supply-demand adjustment market.

Brief Description of the Drawings

[0013]

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Mode for Carrying Out the Invention

[0014] <Embodiment> Hereinafter, the power supply system of the present disclosure will be described with reference to FIGS. 1 to 17. (Configuration) FIG. 1 is a block diagram showing an example of a power supply system according to an embodiment. The power supply system 100 includes a power grid 1, a central power supply command center 2, a supply-demand adjustment market 3, and power plants 4. The power plants 4 include a supply-demand adjustment control device 10, AVQR equipment 20, load control devices 30-1 to 30-n, and generators 40-1 to 40-n. The central power supply command center 2 commands the power plants 4 regarding the power that the power plants 4 should supply to the power grid 1. At the power plants 4, in response to this command, the generators 40-1 to 40-n are operated to supply the specified power and generate electricity. In the supply-demand adjustment market 3, demands for power (regulation power) corresponding to fluctuations in power supply and demand, etc. are presented. In response to this, the power plants 4 can respond to the demands of the supply-demand adjustment market 3 and, if it is determined that there is a possibility of winning the bid, bid in the supply-demand adjustment market 3; otherwise, they do not bid. For example, there are five types of products in the supply-demand adjustment market 3, and the bid-eligibility for the tertiary regulation power (1) and (2) is determined. The supply-demand adjustment control device 10 of the power plants 4 determines the bid-eligibility and the allocation of loads to the generators 40-1 to 40-n when supplying the regulation power. If the bid is won, the power plants 4 operate the generators 40-1 to 40-n so as to supply the total power required by the central power supply command center 2 and the supply-demand adjustment market 3. The load control device 30-1 operates the generator 40-1 with the load allocated by the supply-demand adjustment control device 10. Similarly, each of the load control devices 30-2 to 30-n operates the generators 40-2 to 40-n with the loads allocated by the supply-demand adjustment control device 10 to the generators 40-2 to 40-n. The generators 40-1 to 40-n have a configuration in which, for example, a generator is connected to the rotor of a gas turbine or a steam turbine. Hereinafter, the generator 40-1 may be described as the No. 1 machine, the generator 40-2 as the No. 2 machine, the generator 40-3 as the No. 3 machine, ···, and the generator 40-n as the No. n machine.

[0015] The AVQR (Automatic Voltage & Q Regulator) equipment 20 monitors the voltage fluctuations of the power system 1 and has a bus voltage regulation function to control and maintain the voltage at a constant level, an inter-series balance function that distributes the reactive power sharing of generators 40-1 to 40-n according to the generated reactive power (Q) with respect to the active power (P), and a V-Q control series discrimination function that determines V control and Q control based on the operating states of each generator 40-1 to 40-n. For example, when small-scale distributed power sources such as solar power generation are introduced into the distribution system, voltage control of the distribution system close to the consumers is essential. Assuming that the voltage of the distribution system becomes unstable due to sudden weather changes or substation troubles, at the power plant 4, the AVQR equipment 20 is provided, and the AVQR equipment 20 controls the excitation device to maintain the voltage of the power system 1 at the set value with respect to the supplied power. Also, when the AVQR equipment 20 is required to supply the reactive power necessary to transmit the required power, it calculates the leading-side reactive power distribution and the lagging-side reactive power distribution of generators 1 to n, and through the load control devices 30-1 to 30-n, controls the generators 40-1 to 40-n to supply the required reactive power.

[0016] The supply-demand adjustment control device 10 is composed of one or more computers. The supply-demand adjustment control device 10 includes an input / output unit 11, a load distribution calculation unit 12, an operation schedule calculation unit 13, a support information output unit 14, and a storage unit 15.

[0017] The input / output unit 11 acquires the command information of the supplied power from the central power supply command post 2 and the command information of the adjustment power (EDC signal, LFC signal) from the supply-demand adjustment market 3. Also, when the input / output unit 11 bids in the supply-demand adjustment market 3, it transmits information indicating the intention to bid to the supply-demand adjustment market 3.

[0018] The load distribution calculation unit 12 calculates the load to be assigned to the generators 40-1 to 40-n based on the power demanded from the central power supply command post 2 and the supply-demand adjustment market 3. The load distribution calculation unit 12 calculates the load distribution so that the generators 40-1 etc. are operated at the rated load as much as possible in order to improve the operation efficiency. Also, the load distribution calculation unit 12 determines whether to bid for the regulation power presented by the supply-demand adjustment market 3.

[0019] The operation schedule calculation unit 13 calculates the operation schedules of the generators 40-1 to 40-n based on the load distribution calculated by the load distribution calculation unit 12. There is no particular limitation on the method for calculating the operation schedules of the generators 40-1 to 40-n, and known methods can be applied (for example, Patent Document 2).

[0020] The support information output unit 14 presents to the operator the determination result of whether to bid by the load distribution calculation unit 12 and, when it is determined that bidding is possible, support information for making the final decision on whether to bid.

[0021] The storage unit 15 stores various information such as setting information and processing data. Also, the storage unit 15 stores an operation efficiency DB (DB is an abbreviation for database) 151, an in-site power DB 152, a bidding performance DB 153, etc. Hereinafter, the function of the load distribution calculation unit 12 will be described together with examples of the data contents registered in the databases and data tables stored in the storage unit 15.

[0022] An example of the operation efficiency DB151 is shown in Fig. 2A. As shown in the figure, the operation efficiency DB151 has items such as "rank (operation efficiency)", "operability", "constraint conditions", and "rating" for each generator. The "generator ID" registers the name and identification information of the generator, and the "rating" registers the magnitude of the rated load. In the "rank (operation efficiency)", the order and operation efficiency of the operation efficiencies of generators 40-1 to 40-n are set. The value within the parentheses is the operation efficiency. The operation efficiency may be a value obtained, for example, by calculating the output load of the gas turbine with respect to the fuel input amount to the gas turbine. For example, even for generators of the same type, the operation efficiency may differ depending on the repair status of the moving blades, stationary blades, diaphragms, etc. The load distribution calculation unit 12 calculates the load distribution to generators 40-1 to 40-n so as to preferentially select and operate the generator with a high operation efficiency. In the "operability", it is set whether generators 40-1 to 40-n can operate. For example, generator 40-1 (unit 1) is under repair and cannot operate. In this case, although the order of the operation efficiencies set in the operation efficiency DB151 is unit 3, unit 1, unit 2, since unit 1 cannot operate, substantially, the order is unit 3, unit 2, ···. Note that the content of the operation efficiency DB151 is updated, for example, once a day according to the states of generators 40-1 to 40-n. However, for example, if a trouble or the like occurs in generator 40-1 during the morning of a certain day, the setting content of generator 40-1 in the operation efficiency DB151 may be updated in the afternoon of that day (for example, the "operability" of unit 1 is updated to "not available").

[0023] Here, assume that the rated loads of Units 1 to 3 are 200 (MW), and the content of the operation efficiency DB151 is as illustrated in FIG. 2A. Also, assume that a supply command of 100 (MW) is transmitted from the Central Power Supply Command Post 2. In this case, the load distribution calculation unit 12 determines to allocate 100 (MW) to the most efficient Unit 3 (the partial load factor of Unit 3 is 50%), and not to allocate any load to the other generators 40-2 to 40-n. Next, assume that an adjustment power of 150 (MW) is requested from the supply-demand adjustment market 3, and it is determined to bid in response to this request. In this case, the load distribution calculation unit 12 determines to operate Unit 3, the most efficient one, at its most efficient rated load, and allocate the remainder to Unit 2, the next most efficient one. As a result, 200 (MW) is allocated to Unit 3 and 50 (MW) is allocated to Unit 2 (Unit 3 is at rated load, and the partial load factor of Unit 2 is 25%).

[0024] Note that depending on the power plant, there may be an operation in which equal quantity control (operation of evenly allocating the load to a plurality of generators) is performed. For example, if a supply command of 300 (MW) is transmitted from the Central Power Supply Command Post 2, Units 2 and 3 are each allocated 150 (MW) for operation. In this situation, assume that an adjustment power of 50 (MW) is requested from the supply-demand adjustment market 3. At this time, if it is assumed that even a power plant performing equal quantity operation does not have to evenly allocate the power requested from the supply-demand adjustment market 3, the load distribution calculation unit 12 may allocate 50 (MW) from the supply-demand adjustment market 3 to Unit 3 for operation at rated load, and allocate 150 (MW) to Unit 2 instead of allocating 25 (MW) to each of Units 2 and 3. Even in the case of evenly allocating the power requested from the supply-demand adjustment market 3, the load distribution calculation unit 12 distributes the load so that each generator operates at a load as close to the rating as possible.

[0025] Another example of the operation efficiency DB151 is shown in FIG. 2B. In the "restriction conditions" of the operation efficiency DB151, the restriction conditions regarding each generator 40-1 to 40-n are registered. For example, in the example of FIG. 2B, in the "restriction conditions" of the No. 1 generator, it is set that it cannot operate in a load band of 130 (MW) due to some circumstances such as being a load prohibition band designed for gas turbine combustion burner switching. In such a case, the load distribution calculation unit 12 determines the allocation of the load so as to satisfy the restriction conditions. For example, assume that the required load until 9:00 am is 130 (MW) from the central power supply command center 2, and at 9:00 am, it is set to supply a total of 200 (MW) of 100 (MW) from the central power supply command center 2 and 100 (MW) from the supply and demand adjustment market 3. In this case, the load distribution calculation unit 12 allocates 130 (MW) to the No. 2 generator considering the restriction conditions of the No. 1 generator before 9:00 am, and for the 200 (MW) required at 9:00 am, it calculates a load distribution such that it is allocated to the No. 1 generator with good operation efficiency instead of the No. 2 generator that has been operating until then. The operation schedule calculation unit 13 calculates an operation schedule as exemplified in FIG. 3 based on the load distribution calculated by the load distribution calculation unit 12.

[0026] Note that for the load distribution (whether to continue operation at the minimum load or stop) of Unit 2, which reduces the load instead of Unit 1 after 9:00, the load distribution calculation unit 12 may predict and calculate the power demand in the time period after 9:00. For example, if the situation described in FIGS. 2B and 3 is at 9:00 in the morning on a day expected to be a sunny day in summer, there may be a possibility that an additional power request is presented from the supply-demand adjustment market 3 due to the demand for air conditioning or the like in the time period after 9:00. In such a case, the load distribution calculation unit 12 may assign the minimum load to Unit 2. Also, even in summer on a sunny day, if it is 9:00 at night and it can be determined that there is no expectation of an increase in power demand in the future, the load distribution calculation unit 12 may determine to stop Unit 2 (not distribute the load). For example, the load distribution calculation unit 12 determines whether to stop Unit 2 based on a data table or the like in which information associating the subsequent time period, the predicted weather value, the predicted temperature value, the past time period, the weather, the temperature, and the actual record of the power request from the supply-demand adjustment market 3 is registered, and determines whether to continue or stop the operation (whether to assign the minimum load or not assign the load). An example of the data table is shown in FIG. 4. The data table illustrated in FIG. 4 is stored in the storage unit 15. Also, the bidding performance DB 153 described later may be used for this purpose.

[0027] Further, the load distribution calculation unit 12 may consider the ambient temperature characteristics when allocating loads to the generators 40-1 to 40-n. Generally, in power generation by gas turbines, the output decreases as the ambient temperature rises. Then, during the daytime on a day when the ambient temperature rises, even if the generator 40-1 or the like is operated at the rated load, it may not be possible to obtain the desired output. This is shown in Fig. 5A. The graph 51 in Fig. 5A shows the change in the ambient temperature on a certain day, and the graph 52 shows the change in the output when the generator 40-n is operated at the rated load. For example, in the storage unit 15, a data table exemplified in Fig. 5B that defines the relationship between the ambient temperature and the outputs of the generators 40-1 to 40-n is stored, and the load distribution calculation unit 12 uses this data table and the predicted value of the temperature during the operation time period (for example, it may be the actual value of the temperature in the same time period on the previous day, or it may be the forecast value provided by the Japan Meteorological Agency or the like.) to predict the output of the generator 40-1 or the like to which the load is allocated. Then, as exemplified in Fig. 5A, for example, if it can be predicted that the output will decrease from 10 to 15 o'clock, the load distribution calculation unit 12 may allocate the load corresponding to the predicted insufficient output to the backup generator 40-n. Alternatively, when the backup generator 40-n cannot be prepared, the load distribution calculation unit 12 may determine not to place a bid while being wary of the penalty when the required power supply cannot be supplied.

[0028] An example of the in-facility power DB152 is shown in FIG. 6. As shown in the figure, the in-facility power DB152 has items such as "facility ID", "power consumption", "time zone", and "operating conditions". In the "facility ID", the name and identification information of the facilities that consume power in the power plant 4 are registered. In the "power consumption", the power consumed by the facility is registered. In the "time zone", the time zone during which the facility operates is registered. In the "operating conditions", the conditions under which the facility operates are registered. For example, the air conditioner A consumes X1 (kW) and is set to operate from 9:00 to 20:00 when the temperature is 28 °C or higher. The facility B consumes X2 (kW) and is set to operate from 16:00 to 22:00 from November to March. The load distribution calculation unit 12 refers to the in-facility power DB152, selects the facilities that operate during the time zone when the load is allocated, totals the power consumption of the selected facilities, and subtracts the total power consumption from the total load generated by the generators 40-1, etc. that have been allocated the load. The value after subtraction becomes the actual power that can be supplied to the power grid 1.

[0029] An example of the bid result DB 153 is shown in FIG. 7. As shown in the figure, the bid result DB 153 has items such as "company ID", "power plant ID", "load band", "date", "time zone", and "bid result". In the "company ID" and "power plant ID", the names and identification information of other power plants connected to the power grid 1 are registered. In the "load band", the past load bands for which the power plant bid in response to the demand from the supply-demand adjustment market 3 are registered. In the "date" and "time zone", the date and time zone of the bid are registered respectively. In the "bid result", whether the bid was successful or not (marked with "〇" for successful bid and "×" for unsuccessful bid) is registered. When a request for supplying adjustment power is presented from the supply-demand adjustment market 3, the load distribution calculation unit 12 refers to the bid results of its own and other power plants recorded in the bid result DB 153 to determine whether to bid. For example, if power plant A has won the bid more than a predetermined number of times in the past in a load band of X1 (MW), the load distribution calculation unit 12 determines that power plant A is strong in this load band. When the supply-demand adjustment market 3 requests X1 (MW), it is determined that the possibility of winning against power plant A is low, and no bid is made. Also, when the seasons and time zones in which power plant A has won the bid in the load band of X1 (MW) are limited (for example, in the morning or evening in summer), the load distribution calculation unit 12 determines that power plant A may not have the capacity to supply X1 (MW) outside the seasons and time zones in which it has a winning bid record, and may determine that it is possible to bid. Also, if the conditions are the same as when the self-power plant won the bid in the past, the load distribution calculation unit 12 may determine that it is possible to bid. When the load distribution calculation unit 12 determines that the power that is requested to be supplied can be supplied by the operation of the generators 40-1 to 40-n and there is a possibility of winning the bid based on the bid result DB 153, it determines to bid for the adjustment power presented by the supply-demand adjustment market 3. Also, when the bid result of the supply-demand adjustment market 3 is known, the input / output unit 11 may add a record of the bid result to the bid result DB 153. As a result, the information of the bid results is accumulated in the bid result DB 153, and the load distribution calculation unit 12 can accurately predict the possibility of winning the bid.

[0030] (Operation) Next, the operation of the supply-demand adjustment control device 10 will be described with reference to FIG. 8. FIG. 8 is a flowchart showing an example of the bid necessity determination process according to the embodiment. As a premise, it is assumed that, for example, the allocation of loads to generators 40-1 to 40-n in response to the power supply request from the central power supply control station 2 transmitted once a day has been completed. The load distribution calculation unit 12 distributes the load so that generators with good operating efficiency can operate at loads as close to their ratings as possible.

[0031] First, the input / output unit 11 acquires the regulation power generation request from the supply / demand adjustment market 3 (step S1). Next, the load distribution calculation unit 12 determines whether the sum of the power requested from the central power supply control station 2 and the regulation power requested from the supply / demand adjustment market 3 is within the output range of the power plant 4 (step S2). If it is within the output range (step S2; Yes), the process proceeds to step S4.

[0032] If it is not within the output range (step S2; No), the load distribution calculation unit 12 determines whether it is possible to handle it by overload operation (step S3). Depending on the power plant, for example, operation exceeding the approved output by 5% may be permitted, and in cases such as operation conditions with low atmospheric temperature in winter, output improvement may be expected by overload operation. Fig. 5B shows an example of the relationship between the atmospheric temperature and the output (maximum output) when overload operation is performed, and the relationship between the atmospheric temperature and the output (rated output) during normal operation without overload operation. Graph 52-A in Fig. 5B shows the output during normal operation, and graph 52-B shows the output during overload operation. As shown in the figure, below a certain atmospheric temperature, an output exceeding the rated output can be obtained by overload operation. The load distribution calculation unit 12 determines whether it is within the range of output that can be handled by overload operation. For example, as shown in Fig. 8B, the load distribution calculation unit 12 calculates how much overload is possible while having a margin within the maximum output based on the power factor curves of generators 40-1 to 40-n. Also, the load distribution calculation unit 12 determines whether the calculated overload can be output considering the atmospheric temperature characteristics (graph 52-B) of the output during overload operation shown in Fig. 5B. Details of the calculation method for the maximum value of the load that can output power exceeding the rated load with a predetermined margin based on the power factor curve are well-known and will not be described here. If the overload operation is not permitted, or if the required power cannot be supplied even by performing the overload operation, or if it can be determined that the overload (e.g., 5%) obtained by calculation cannot be output due to operation conditions such as atmospheric temperature, the load distribution calculation unit 12 determines that it is impossible to handle it by overload operation. If the load distribution calculation unit 12 determines that the overload operation is permitted and the required power can be supplied by the overload operation, it determines that it is possible to handle it by overload operation. If it is determined that it is impossible to handle it by overload operation (step S3; No), the load distribution calculation unit 12 decides not to bid for the current adjustment power supply request. In this case, the support information output unit 14 outputs information notifying that bidding is not possible (step S13). For example, the support information output unit 14 outputs the screen illustrated in Fig. 9A to the display device monitored by the operator.On this screen, words such as "Received an MW supply request but did not bid because it exceeded the output range." are displayed. If it is determined that countermeasures can be taken by overloading operation (step S3; Yes), proceed to step S4.

[0033] In step S4, the load distribution calculation unit 12 determines whether there is a reactive power request (step S4). It determines whether the request from the supply-demand adjustment market 3 includes reactive power. If there is no reactive power request (step S4; No), proceed to step S6. If there is a reactive power request (step S4; Yes), the load distribution calculation unit 12 determines whether it can respond to the reactive power request (step S5). The load distribution calculation unit 12 inquires whether the AVQR facility 20 can supply the requested reactive power. The AVQR facility 20 determines whether it is possible to make adjustments to supply the requested reactive power and responds with the determination result to the load distribution calculation unit 12. The AVQR facility 20 has a function of calculating the sharing distribution of reactive power for supplying the requested reactive power. With this function, the AVQR facility 20 calculates the distribution of reactive power to the generators 40-1 to 40-n. As a result, if the reactive power assigned to each generator is within the range defined at the power plant 4, it is determined that adjustment is possible; otherwise, it is determined that adjustment is impossible. When the load distribution calculation unit 12 receives a response of adjustable from the AVQR facility 20, it determines that it can respond to the reactive power request. When it receives a response of non-adjustable, it determines that it cannot respond. If it is determined that it cannot respond to the reactive power request (step S5; No), the load distribution calculation unit 12 decides not to bid for the current supply request for adjustment power. In this case, the support information output unit 14 outputs information notifying that bidding is not possible (step S13). For example, the support information output unit 14 outputs the screen illustrated in FIG. 9A to the display device monitored by the operator. On this screen, words such as "Received an MW supply request but did not bid because reactive power cannot be adjusted." are displayed. If it is determined that it can respond to the reactive power request (step S5; Yes), proceed to step S6.

[0034] Next, the load distribution calculation unit 12 analyzes the output characteristics (step S6). For example, based on the atmospheric temperature, the load distribution calculation unit 12 predicts the outputs of the generators 40-1 to 40-n during the time period when the supply-demand adjustment market 3 requests regulation power. Also, the load distribution calculation unit 12 refers to the operation efficiency DB151 to obtain information such as the operability of each generator 40-1 to 40-n, the load bands where operation is not possible, and the magnitudes of the rated loads.

[0035] Next, the load distribution calculation unit 12 analyzes the in-plant power (step S7). The load distribution calculation unit 12 refers to the in-plant power DB152 to total the power consumed by the facilities in the power plant 4 during the time period when the supply-demand adjustment market 3 requests regulation power.

[0036] Next, the load distribution calculation unit 12 determines whether the load corresponding to the regulation power generation request obtained in step S1 can be output based on the analysis results of steps S6 and S7 (step S8). The load distribution calculation unit 12 calculates the total load of the generators 40-1 to 40-n that can be output during the time period when the supply-demand adjustment market 3 requests regulation power analyzed in step S6, and subtracts the total power consumed by the facilities in the power plant 4 analyzed in step S7 from the result. If the value of the subtracted result is equal to or greater than the regulation power requested by the supply-demand adjustment market 3, the load distribution calculation unit 12 determines that output is possible; otherwise, it determines that output is not possible. Note that if it is possible to request output suppression of the facilities in the power plant 4 in order to bid in the supply-demand adjustment market 3, it may have an output suppression function. In that case, the power consumption value in the in-plant power DB152 shall be rewritten to the suppressed value.

[0037] When it is determined that the load corresponding to the regulation power generation demand from the regulation market 3 cannot be output (step S8; No), the load distribution calculation unit 12 determines not to bid for the current supply request of the regulation power. In this case, the support information output unit 14 outputs information notifying that bidding is impossible (step S13). For example, the support information output unit 14 outputs the screen illustrated in FIG. 9A to the display device monitored by the operator. A statement such as "Although a MW supply request was received, it was determined that output was impossible, so no bid was made." is displayed on this screen. When it is determined that the response to the reactive power demand is possible (step S8; Yes), the process proceeds to step S9.

[0038] Next, the load distribution calculation unit 12 analyzes the bidding results of itself and others (step S9). For example, the load distribution calculation unit 12 determines whether it is possible to bid based on the time zone when the regulation market 3 requests regulation power and the magnitude of the regulation power (load band) based on the bidding result DB 153. For example, if the current bidding conditions are within a range where the season, time zone, and load band when winning the bid in the past match or can be regarded as matching, the load distribution calculation unit 12 determines that bidding is possible. Alternatively, if two of the season, time zone, and load band match or are within a range where they can be regarded as matching, or if the load bands match even though the seasons and time zones are different, the load distribution calculation unit 12 may determine that bidding is possible. When it is determined that bidding is possible (step S10; Yes), the process proceeds to step S11.

[0039] When it is determined that it is impossible to submit a bid (step S10; No), the load distribution calculation unit 12 decides not to submit a bid for the current adjustment power supply request. In this case, the support information output unit 14 outputs information notifying that bidding is impossible (step S13). For example, the support information output unit 14 outputs the screen illustrated in FIG. 9A to the display device monitored by the operator. On this screen, words such as "Although an MW supply request has been received, it has been determined that the probability of winning the bid is low, so no bid has been submitted." are displayed. Note that the display and non-display of the screen illustrated in FIG. 9A may be switched by setting. For example, if the operator feels that it is obstructive during operation monitoring, the screen can be set not to be displayed. Also, although it has been decided to display this screen when the determination in steps S3, S5, S8, and S10 is No, the display and non-display may be switched according to the situation. For example, it may be set to display only the screen of FIG. 9A when the determination in step S10 is No, and to be non-displayed when the determination in steps S3, S5, and S8 is No.

[0040] Also, although the load distribution calculation unit 12 makes the determination in step S10, the load distribution calculation unit 12 may refer to the bidding result DB 153, analyze the possibility of winning the bid, present the result to the operator, and allow the operator to determine whether to submit a bid. For example, the support information output unit 14 may display a screen on which "Yes" and "No" can be selected together with a message such as "In this load band, another power plant A has won the bid 10 times in the past, and the winning bid record of this power plant is 0 times. Do you want to submit a bid this time?" based on the result analyzed by the load distribution calculation unit 12. In this case, when the operator selects "Yes", the process proceeds to step S11.

[0041] Next, the load distribution calculation unit 12 performs load distribution calculation (step S11). The load distribution calculation unit 12 refers to the operation efficiency DB 151 to obtain information such as the rated load, operability, and operation efficiency of each generator 40-1, etc., and calculates the load distribution so that as many generators 40-1, etc. as possible operate at a load close to the rated load at which the maximum efficiency is achieved, with respect to the required load obtained by summing the electric power requested from the central power supply command post 2 and the regulating power requested from the supply-demand adjustment market 3. Specifically, for the load distribution adjustment, after giving priority to the unit with a high partial load factor to achieve rated operation, a partial load operation corresponding to the remaining load amount output is assigned. Also, the load distribution calculation unit 12 performs load distribution so that generators 40-1, etc. with high operation efficiency are given priority to reach the rated load. For example, currently, units 1 to 3 with a rated load of 200 (MW) are all operating at a partial load of 100 (MW), and it is assumed that unit 1 has the highest operation efficiency and unit 2 has the second highest operation efficiency. In the case of adding and distributing the newly requested 200 (MW) from the supply-demand adjustment market 3 in this situation, the load distribution calculation unit 12 sums the original load of 300 (MW) and the newly requested load of 200 (MW), and out of the total of 500 (MW) obtained, assigns 200 (MW) so that unit 1 with the highest operation efficiency reaches the rated load, then assigns 200 (MW) so that unit 2 with high operation efficiency reaches the rated load, and assigns the remaining 100 (MW) to unit 3. In this way, by distributing the total load so that the load assigned to each generator is as close as possible to the rated load in order from the generators with high operation efficiency among the plurality of generators, the operation efficiency of each generator can be maximized, and as a result, the operation efficiency of the entire power plant 4 can be maximized. The load distribution calculation unit 12 records the load distribution in the case of successful bidding in the storage unit 15.

[0042] In the next step S12, the support information output unit 14 outputs bid confirmation information (step S12) and determines whether to finally place a bid based on the operator's judgment. If it is determined that bidding is possible or impossible, the support information output unit 14 outputs bid confirmation information (step S12). First, the support information output unit 14 displays the screen illustrated in FIG. 9B. If "No" is selected on this screen, the bid is not executed. If "Yes" is selected, the support information output unit 14 displays the screen illustrated in FIG. 10A. The load distribution calculated in step S11 is displayed in FIG. 10A. If "Yes" is selected on the screen of FIG. 10A, the support information output unit 14 displays the confirmation screen illustrated in FIG. 10B. If "No" is selected on this confirmation screen, the bid is not executed. If "Yes" is selected, the bid is executed. The input / output unit 11 transmits information indicating that a bid is to be placed in the supply-demand adjustment market 3.

[0043] If "Change" is selected on the screen of FIG. 10A, the support information output unit 14 displays the change screen illustrated in FIG. 11A or FIG. 12. The change screen of FIG. 11A will be described. On the change screen of FIG. 11A, the operator can set the load assigned to each unit. For example, the operator sets 200 (MW) for unit 1, 100 (MW) for unit 2, and 200 (MW) for unit 3 and selects "Confirm". If "Confirm" is selected on the screen of FIG. 11A, the support information output unit 14 displays the confirmation screen illustrated in FIG. 11B. If "Return" is selected on the screen of FIG. 11A, the support information output unit 14 displays the confirmation screen of FIG. 10B.

[0044] On the confirmation screen illustrated in FIG. 11B, the load distribution before the change and the load distribution set by the operator are displayed, and further, the average value of the operating efficiencies of units 1 to 3 is displayed as the total efficiency. If "OK" is selected on the screen of FIG. 11B, the bid is executed. If "Return" is selected, the confirmation screen of FIG. 11A is displayed.

[0045] Next, the confirmation screen in Fig. 12 will be described. In the change screen of Fig. 12, the load distribution calculated in step S11 ("standard setting" in Fig. 12) and the load distribution recalculated by the load distribution calculation unit 12 ("recommended setting" in Fig. 12) are displayed. The recommended setting is the load distribution calculated by the load distribution calculation unit 12 with reference to the content of the latest operation efficiency DB151 again after the operator selects "change" on the screen of Fig. 10A. The operation efficiency DB151 is updated once a day. For example, if something happens that prevents the No. 1 unit from operating at the rated load in the morning of that day, the content will not be immediately reflected in the operation efficiency DB151. In such a case, when the operator checks that 200 (MW) is assigned to the No. 1 unit on the screen of Fig. 10A, for example, the operator sets the fact that the No. 1 unit cannot operate at the rated load (200 (MW)) in the "restriction conditions" of the operation efficiency DB151 and updates the operation efficiency DB151. Then, the operator selects "change" on the screen of Fig. 10A. Then, for example, the load distribution illustrated in the "recommended setting" of Fig. 12 is calculated, and the confirmation screen illustrated in Fig. 12 is displayed. When "adopt" is selected on the screen of Fig. 12, the bidding is executed. When "return" is selected, the confirmation screen illustrated in Fig. 10A is displayed.

[0046] When "no" is selected on the screen of Fig. 10A, the support information output unit 14 displays the confirmation screen illustrated in Fig. 13. On the screen of Fig. 13, confirmation of withdrawing the supply request (not bidding) is required. When "yes" is selected on the screen of Fig. 13, the bidding is not executed. When "no" is selected on the screen of Fig. 13, the support information output unit 14 displays the confirmation screen illustrated in Fig. 10A.

[0047] Also, when the determination in step S4 is Yes, the support information output unit 14 displays the screen illustrated in FIG. 14A. When "No" is selected on the screen of FIG. 14A, the bidding is not executed. When "Yes" is selected on the screen of FIG. 14A, the support information output unit 14 displays the screen illustrated in FIG. 14B. The rated reactive power and the lagging reactive power in FIG. 14B are calculated by the AVQR equipment 20. This calculation itself is a known one and is executed by the AVQR equipment of a general power plant, so the calculation method will not be described. When "No" is selected on the screen of FIG. 14B, the bidding is not executed. For example, when the change of reactive power is not permitted, the operator selects "No". When "Yes" is selected on the screen of FIG. 14B, the support information output unit 14 displays the screen illustrated in FIG. 14C. On the screen of FIG. 14C, the distribution of reactive power to units 1 to 3 is displayed. This distribution is calculated by the AVQR equipment 20 according to a known calculation method. When "No" is selected on the screen of FIG. 14C, the bidding is not executed. When "Yes" is selected on the screen of FIG. 14C, the bidding is executed. Alternatively, when something other than reactive power is required, the screen illustrated in FIG. 9B is displayed, and the processes described with reference to FIGS. 9B to 13 are executed. When "Change" is selected on the screen of FIG. 14C, a screen for the operator to set the reactive power distributed to each unit is displayed. When "Yes" is selected after setting the distribution of reactive power on this screen, the bidding is executed. Generally, it is rare to try to bid in response to the demand from the supply-demand adjustment market 3 until the reactive power is adjusted. However, for example, when the capacitor function does not work due to a trouble in the substation, there may be a possibility of considering bidding. According to the present embodiment, since the possibility of adjusting the reactive power and the allocation of the reactive power to each unit are automatically calculated and the results are presented, the operator can determine whether to bid in response to the demand for reactive power only by checking the results.

[0048] Also, when the determination in step S3 is Yes, the support information output unit 14 displays the screen illustrated in FIG. 15A. If "No" is selected on the screen of FIG. 15A, the bidding is not executed. If "Yes" is selected on the screen of FIG. 15A, the support information output unit 14 displays the screen illustrated in FIG. 15B. If "No" is selected on the screen of FIG. 15B, the bidding is not executed. For example, even if it is calculated in the calculation of step S3 that overload output is possible, if an increase in the atmospheric temperature is predicted and it is expected that the required load cannot be generated considering the accompanying output decrease, the operator selects "No". If "Yes" is selected on the screen of FIG. 15B, the support information output unit 14 displays the screen illustrated in FIG. 15C. The target output and the lagging reactive power on the screen of FIG. 15C are calculated by the AVQR facility 20 by a known calculation method. If "No" is selected on the screen of FIG. 15C, the bidding is not executed. If "Yes" is selected on the screen of FIG. 15C, the support information output unit 14 displays the screen illustrated in FIG. 14C. The subsequent processing is as described with reference to FIG. 14C. According to the present embodiment, since the feasibility of overload operation and the allocation to each unit are automatically calculated and the results are presented, the operator can determine whether to perform overload operation and bid only by checking the results.

[0049] (Effect) As described above, according to the present embodiment, when there is a supply request for regulation power from the supply-demand adjustment market 3, the load distribution of each generator 40-1 to 40-n that optimizes the operation efficiency of the entire power plant 4 is calculated, and based on the load distribution result, it is possible to determine the feasibility of bidding. Further, when determining the feasibility of bidding, the available power is calculated considering the operability of each generator, the operating constraints, the atmospheric temperature characteristics, furthermore, the feasibility of overload operation and reactive power adjustment, and the power consumed within the power plant 4, and the feasibility of bidding can be determined from the calculation results. Also, based on the past bidding results, it is possible to determine the feasibility of bidding while expecting the possibility of winning the bid.

[0050] In FIG. 1, it was decided to perform load distribution and bid-eligibility judgment for the supply request from the supply-demand adjustment market 3 within one power plant. However, as schematically shown in FIG. 16, a higher-level control device 50 having the same functions as the supply-demand adjustment control devices 10a to 10c is provided above a plurality of power plants 4a to 4c. For a supply request for one adjustment power from the supply-demand adjustment market 3, the load distribution of the generators owned by each power plant is optimized in cooperation among the plurality of power plants 4a to 4c, the bid-eligibility is judged, and the plurality of power plants 4a to 4c are controlled to supply the requested adjustment power in cooperation. For example, the higher-level control device 50 distributes the total load obtained by adding the power supply request from the central power supply command center 2 and the adjustment power generation request from the supply-demand adjustment market 3 to the generators among the plurality of generators provided in the power plants 4a to 4c in order from the one with higher operation efficiency so that the load distributed to each generator can be as close as possible to the rated load.

[0051] FIG. 17 is a diagram showing an example of the hardware configuration of the supply-demand adjustment control device. The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905. The above-described supply-demand adjustment control devices 10, 10a to 10c, and the higher-level control device 50 are implemented in the computer 900. And each of the above-described functions is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads the program from the auxiliary storage device 903 and expands it in the main storage device 902, and executes the above processing according to the program. Also, the CPU 901 secures a storage area in the main storage device 902 according to the program. Also, the CPU 901 secures a storage area in the auxiliary storage device 903 for storing data during processing according to the program. Also, the CPU 901 uses the information input from the input / output interface 904 and the communication interface 905, expands it in the main storage device 902, executes the above processing according to the program, and outputs it.

[0052] Note that a program for realizing all or part of the functions of the supply-demand adjustment control devices 10, 10a to 10c and the host control device 50 may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed to perform processing by each functional unit. The "computer system" referred to here shall include hardware such as an OS and peripheral devices. Also, the "computer system" shall include a homepage providing environment (or display environment) if the WWW system is being used. Further, the "computer-readable recording medium" refers to a portable medium such as a CD, DVD, USB, etc., and a storage device such as a hard disk built into a computer system. Also, when this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may expand the program in the main storage device 902 and execute the above processing. Also, the above program may be for realizing a part of the functions described above, and may further be such that it can be realized in combination with a program already recorded in the computer system for the functions described above.

[0053] As described above, some embodiments according to the present disclosure have been described, but all of these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

[0054] <Supplementary Note> The supply-demand adjustment control device, supply-demand adjustment control method, and program described in the embodiment can be understood as follows, for example.

[0055] (1) The supply-demand adjustment control device according to the first aspect includes an acquisition unit that acquires a first power required for a power plant having a plurality of generators and a second power required from the supply-demand adjustment market, and a total load obtained by summing the first power and the second power. A load distribution unit that distributes the total load to the plurality of generators in order from the one with the highest operating efficiency so that the distribution of the load to the generator becomes a load as close as possible to the rated load, and based on whether the supply of the total load is possible, A bidding determination unit that determines whether to bid in response to a request from the supply-demand adjustment market. Thereby, it is possible to calculate the load distribution to the generator considering the operating efficiency and determine whether to bid in response to a power supply request from the supply-demand adjustment market.

[0056] (2) The supply-demand adjustment control device according to the second aspect is the supply-demand adjustment control device of (1), and the bidding determination unit determines whether to bid in response to the request based on whether the reactive power included in the request can be supplied. Thereby, it is possible to cope even when reactive power is requested.

[0057] (3) The supply-demand adjustment control device according to the third aspect is the supply-demand adjustment control device of (1) to (2), and when the total load exceeds the upper limit of the load that the power plant can output, the bidding determination unit determines whether the total load can be supplied by operating the generator at an overload. Thereby, it is possible to determine whether to perform an overload operation to respond to a request from the supply-demand adjustment market 3.

[0058] (4) The supply-demand adjustment control device according to the fourth aspect is the supply-demand adjustment control device of (1) to (3), and the bidding determination unit determines whether the total load can be supplied based on the ambient temperature characteristics of the generator. Thereby, it is possible to avoid a situation where a desired load cannot be supplied due to an increase in the ambient temperature.

[0059] (5) The supply-demand adjustment control device according to the fifth aspect is the supply-demand adjustment control device of (1) to (4), wherein the bidding determination unit subtracts the power required in the power plant from the total power output by the plurality of generators to determine whether the entire load can be supplied. Thereby, it is possible to determine whether or not to bid in consideration of the power used in the power plant.

[0060] (6) The supply-demand adjustment control device according to the sixth aspect is the supply-demand adjustment control device of (1) to (5), wherein the bidding determination unit determines whether or not to bid on the request based on the bidding results for past requests from the supply-demand adjustment market. Thereby, it is possible to avoid bidding when there is no prospect of winning the bid.

[0061] (7) The supply-demand adjustment control device according to the seventh aspect is the supply-demand adjustment control device of (6), wherein the bidding determination unit determines not to bid on the request if there is a record of another power plant winning the bid for the load band included in the request based on the bidding results for past requests from the supply-demand adjustment market, and determines to bid on the request if there is no record of winning the bid. For the load bands that other power plants are good at, it is possible to avoid bidding with no prospect.

[0062] (8) The supply-demand adjustment control device according to the eighth aspect is the supply-demand adjustment control device of (1) to (7), and further includes a support information output unit that outputs information requesting a final confirmation of the acceptability of the bid when the bidding determination unit determines to bid on the request. Thereby, the operator can make a final determination on the bid.

[0063] (9) The supply-demand adjustment control device according to the ninth aspect is the supply-demand adjustment control device of (8), wherein the support information output unit outputs a user interface (FIG. 11A) capable of changing the load distributed by the load distribution unit. Thereby, the operator can set the final load distribution.

[0064] (10) The supply-demand adjustment method according to the tenth aspect includes: a step of obtaining a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market; and adding the first power and the second power. The total load is distributed to the plurality of generators in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load. A step of determining whether to bid in response to a request from the supply-demand adjustment market based on whether the total load can be supplied.

[0065] (11) The overall supply-demand adjustment method according to the eleventh aspect includes: a step of obtaining a first power required for a plurality of power plants and a second power required from a supply-demand adjustment market; and adding the first power and the second power. The total load is distributed to the generators provided in the plurality of power plants in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load. A step of determining whether to bid in response to a request from the supply-demand adjustment market based on whether the total load can be supplied.

[0066] (12) The program according to the twelfth aspect causes a computer to perform: a step of obtaining a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market; and adding the first power and the second power. The total load is distributed to the plurality of generators in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load. A step of determining whether to bid in response to a request from the supply-demand adjustment market based on whether the total load can be supplied.

[0067] (13) The program according to the 13th aspect causes a computer to execute steps of: acquiring a first power required for a plurality of power plants and a second power required from a supply-demand adjustment market; distributing the total load obtained by adding the first power and the second power to generators provided in the plurality of power plants in order from the one with the highest operation efficiency so that the load distributed to each generator is as close as possible to the rated load; and determining whether to bid in response to the request from the supply-demand adjustment market based on whether it is possible to supply the total load.

Explanation of Signs

[0068] 100 ··· Power supply system 1 ··· Power grid 2 ··· Central power supply command center 3 ··· Supply-demand adjustment market 4, 4a, 4b, 4c ··· Power plants 10, 10a, 10b, 10c ··· Supply-demand adjustment control devices 11 ··· Input / output unit 12 ··· Load distribution calculation unit 13 ··· Operation schedule calculation unit 14 ··· Support information output unit 15 ··· Storage unit 151 ··· Operation efficiency DB 152 ··· In-plant power DB 153 ··· Bidding performance DB 20 ··· AVQR equipment 30-1 to 30-n ··· Load control devices 40-1 to 40-n ··· Generators 50 ··· Higher-level control device 900 ··· Computer 901 ··· CPU 902 ··· Main memory device 903 ··· Auxiliary storage device 904 ··· Input / output interface 905 ··· Communication interface

Claims

1. An acquisition unit that acquires a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market; A load distribution unit that distributes the total load obtained by adding the first power and the second power to the generators in order from those with high operating efficiency among the plurality of generators so that the load distributed to each generator is as close as possible to the rated load; A bidding determination unit that determines whether it is possible to bid in response to a request from the supply-demand adjustment market based on whether it is possible to supply the total load; An assistance information output unit that outputs information requesting a final confirmation of the acceptability of the bid when the bidding determination unit determines that it is possible to bid in response to the request; An output unit that transmits information indicating that a bid is made to the supply-demand adjustment market; Comprising; The bidding determination unit further determines that it is possible to bid in response to the request based on a database in which bidding results by load band and time band for past requests from the supply-demand adjustment market are recorded, in the same load band and time band as the load band and time band in which the power plant could bid in the past when power is requested from the supply-demand adjustment market; The information requesting the final confirmation includes the magnitudes of the loads distributed to each of the plurality of generators by the load distribution unit, and when there is an input indicating approval of the output final confirmation, the output unit transmits information indicating that a bid is made to the supply-demand adjustment market. Supply-demand adjustment control device.

2. The bidding determination unit Determines whether it is possible to bid in response to the request based on whether it is possible to supply the reactive power included in the request. The supply-demand adjustment control device according to claim 1.

3. The bidding determination unit When the total load exceeds the upper limit of the load that the power plant can output, determines whether it is possible to supply the total load by operating the generator under overload. The supply-demand adjustment control device according to claim 1 or claim 2.

4. The bidding determination unit Determines whether it is possible to supply the total load based on the ambient temperature characteristics of the plurality of generators. The supply-demand adjustment control device according to claim 1 or claim 2.

5. The bidding determination unit Subtracts the power required in the power plant from the total power output by the plurality of generators to determine whether it is possible to supply the total load. The supply-demand adjustment control device according to claim 1 or claim 2.

6. The bidding determination unit Based on the database in which the bidding results by load band and time band for past demands from the demand-supply adjustment market are recorded, if there are a predetermined number or more of records of other power plants winning bids for the load bands included in the demand, it is determined that it is impossible to bid for the demand. If there are no records of other power plants winning bids for the load bands and time bands included in the demand, it is determined that it is possible to bid for the demand. The demand-supply adjustment control device according to claim 1 or claim 2.

7. When there is an input requesting a change to the final confirmation, the support information output unit outputs a user interface capable of changing the load distributed by the load distribution unit. When, through the user interface, the changed load is input for each of the plurality of generators, the support information output unit outputs information requesting the final confirmation including the changed load. When there is an input approving the final confirmation, the output unit transmits information indicating that a bid is to be made to the demand-supply adjustment market. The demand-supply adjustment control device according to claim 1 or claim 2.

8. When there is an input requesting a change to the final confirmation, the support information output unit outputs information requesting the final confirmation including the load distribution recalculated by the load distribution unit based on the latest operating efficiency of the plurality of generators. When there is an input approving the final confirmation, the output unit transmits information indicating that a bid is to be made to the demand-supply adjustment market. The demand-supply adjustment control device according to claim 1 or claim 2.

9. As a result of distributing the total load, for the generator to which no load is distributed, based on a data table in which information associating the time band when no load is distributed, the predicted value of the weather in the time band, the predicted value of the temperature in the time band, the past time band, the weather in the time band, the temperature in the time band, and the record of the power demand from the demand-supply adjustment market in the time band is registered, the power demanded from the demand-supply adjustment market in the time band is predicted. If it is predicted that there is no prospect of an increase in power demand, no load is assigned to the generator to which no load is distributed. If it is predicted that the power demand will increase, the minimum load is assigned to the generator to which no load is distributed. The demand-supply adjustment control device according to claim 1 or claim 2.

10. The step of obtaining the first power required for a power plant having a plurality of generators and the second power required from the demand-supply adjustment market The step of distributing the total load obtained by summing the first power and the second power to the generators among the plurality of generators in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load; The step of determining whether it is possible to bid in response to a request from the supply-demand adjustment market based on whether the total load can be supplied; The step of outputting information requesting a final confirmation of the feasibility of the bid when it is determined in the determining step that it is possible to bid in response to the request; The step of transmitting information indicating that a bid is made to the supply-demand adjustment market; comprising; In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time band for past requests from the supply-demand adjustment market are recorded, in the same load band and time band as the load band and time band in which the power plant could bid in the past, when power is requested from the supply-demand adjustment market, it is determined that it is possible to bid in response to the request; The information requesting the final confirmation includes the magnitudes of the loads distributed to each of the plurality of generators in the step of distributing the total load, and when there is an input indicating approval of the output final confirmation, in the outputting step, information indicating that a bid is made to the supply-demand adjustment market is transmitted. Supply-demand adjustment method.

11. The step of obtaining the first power required for a plurality of power plants and the second power required from the supply-demand adjustment market; The step of distributing the total load obtained by summing the first power and the second power to the generators provided in the plurality of power plants in order from the one with the highest operating efficiency so that the load distributed to each generator is as close as possible to the rated load; The step of determining whether it is possible to bid in response to a request from the supply-demand adjustment market based on whether the total load can be supplied; The step of outputting information requesting a final confirmation of the feasibility of the bid when it is determined in the determining step that it is possible to bid in response to the request; The step of transmitting information indicating that a bid is made to the supply-demand adjustment market; comprising; In the step of determining whether the bid is possible, further, based on a database in which the bidding results by load band and time band for past requests from the supply-demand adjustment market are recorded, in the same load band and time band as the load band and time band in which the plurality of power plants could bid in the past, when power is requested from the supply-demand adjustment market, it is determined that it is possible to bid in response to the request; The information that requests the final confirmation includes the magnitude of the load distributed to each of the generators included in the plurality of power plants in the step of distributing the total load. When there is an input for approving the output final confirmation, in the step of outputting, information indicating that a bid is made to the supply-demand adjustment market is transmitted. Overall supply-demand adjustment method.

12. In a computer, a step of obtaining a first power required for a power plant having a plurality of generators and a second power required from a supply-demand adjustment market; a step of distributing the total load obtained by adding the first power and the second power to the generators in order from the one with the highest operation efficiency among the plurality of generators so that the load distributed to each generator is as close as possible to the rated load; a step of determining whether it is possible to bid for the request from the supply-demand adjustment market based on whether it is possible to supply the total load; a step of outputting information requesting a final confirmation of the acceptability of the bid when it is determined in the step of determining that it is possible to bid for the request; a step of transmitting information indicating that a bid is made to the supply-demand adjustment market; and having In the step of determining whether the bid is possible, further, based on a database in which the bidding performance by load band and time band for past requests from the supply-demand adjustment market is recorded, when power is requested from the supply-demand adjustment market in the same load band and time band as the load band and time band in which the power plant could bid in the past, it is determined that it is possible to bid for the request. The information that requests the final confirmation includes the magnitude of the load distributed to each of the generators included in the plurality of power plants in the step of distributing the total load. When there is an input for approving the output final confirmation, in the step of outputting, a process of transmitting information indicating that a bid is made to the supply-demand adjustment market. A program for causing execution.

13. In a computer, a step of obtaining a first power required for a plurality of power plants and a second power required from a supply-demand adjustment market; a step of distributing the total load obtained by adding the first power and the second power to the generators included in the plurality of power plants in order from the one with the highest operation efficiency so that the load distributed to each generator is as close as possible to the rated load; a step of determining whether it is possible to bid for the request from the supply-demand adjustment market based on whether it is possible to supply the total load; When it is determined in the determining step that a bid can be placed in response to the request, a step of outputting information requesting a final confirmation of the bidability; A step of transmitting information indicating that a bid is to be placed in the supply-demand adjustment market; and has In the step of determining whether or not a bid can be placed, further, based on a database in which bid results by load band and time band for past requests from the supply-demand adjustment market are recorded, when power is requested from the supply-demand adjustment market in the same load band and time band as the load band and time band in which the plurality of power plants could place bids in the past, it is determined that a bid can be placed in response to the request; The information requesting the final confirmation includes the magnitude of the load distributed to each of the generators provided in the plurality of power plants in the step of distributing the total load, and when there is an input indicating approval of the output final confirmation, in the outputting step, a process of transmitting information indicating that a bid is to be placed in the supply-demand adjustment market; A program for causing execution.

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