Fuel cell power generation control system and method

Abstract

The invention discloses a fuel cell power generation control system and method, and relates to the technical field of electric power, and the system comprises a profit calculation module which calculates the power generation state profit and the hot standby state profit under each time-of-use electricity price; the time period determination module determines a first time period when the power generation state income is greater than the hot standby state income, and determines a second time period when the power generation state income is less than the hot standby state income; the lift-up control module determines a lift-up income curve from the second time period to the first time period, and controls the fuel cell to improve the power generation power according to the lift-up income curve; the load reduction control module determines a load reduction income curve from the first time period to the second time period, and controls the fuel cell to reduce the power generation power according to the load reduction income curve; and the target power generation module determines the generated power corresponding to the ending moment of the up-loading income curve as the target power, and generates power from the ending moment of the up-loading income curve to the starting moment of the down-loading income curve at the target power, so that the power generation efficiency can be improved, and the fuel waste can be reduced.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a fuel cell power generation control system and method. Background Art

[0002] A fuel cell is an electrochemical device that can directly convert chemical energy stored in fuel and oxidant into electrical energy. Since the 1940s, four generations of fuel cells have been developed. Solid oxide fuel cells (SOFC) are the third generation of fuel cells, which have the advantages of high power generation efficiency, strong fuel adaptability, and high-temperature waste heat recovery.

[0003] At present, the power generation mode of fuel cells is to continuously generate electricity at a target power. Generating electricity at a target power during the low electricity consumption period will cause redundancy and waste fuel. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to provide a fuel cell power generation control system and method to improve the power generation efficiency of the fuel cell and reduce fuel waste.

[0005] To achieve the above-mentioned purpose, one aspect of an embodiment of the present application provides a fuel cell power generation control system, the system comprising:

[0006] The revenue calculation module is used to calculate the revenue of the power generation state and the revenue of the hot standby state under each time-of-use electricity price;

[0007] a time period determination module, configured to determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period;

[0008] A load increase control module, used to determine a load increase benefit curve from the second period to the first period, and control the fuel cell to increase power generation according to the load increase benefit curve;

[0009] a load reduction control module, configured to determine a load reduction benefit curve from the first period to the second period, and control the fuel cell to reduce power generation according to the load reduction benefit curve;

[0010] The target power generation module is used to determine the power generation corresponding to the end time of the load-up maximum benefit curve as the target power, and control the fuel cell to generate electricity at the target power from the end time of the load-up maximum benefit curve to the start time of the load-down maximum benefit curve.

[0011] In some embodiments, the power generation state revenue is equal to the power sales revenue minus the gas cost in the power generation state;

[0012] The hot standby state benefit is equal to zero minus the gas cost in the hot standby state.

[0013] In some embodiments, the revenue in the power generation state is equal to the revenue from electricity sales plus the revenue from heat sales in the power generation state minus the gas cost in the power generation state;

[0014] The thermal standby state revenue is equal to the heat sales revenue in the thermal standby state minus the gas cost in the thermal standby state.

[0015] In some embodiments, the load control module includes:

[0016] a load-raising benefit calculation unit, configured to use the start time of the first period as a reference point for the load-raising end time, and to obtain the load-raising benefit curve using a linear function according to the reference point for the load-raising end time and the maximum load-raising speed allowed by the system;

[0017] A loading time determining unit, used to determine the loading time according to the loading yield curve;

[0018] A load-up start time determination unit, used to determine the load-up start time of the load-up time;

[0019] The load-up power generation unit is used to control the fuel cell to start power generation at the load-up start time.

[0020] In some embodiments, the load increase revenue calculation unit includes:

[0021] A load-up benefit calculation subunit, configured to calculate a benefit curve corresponding to the load-up end time in each candidate time period according to the linear function;

[0022] The load-up time determination unit comprises:

[0023] The load-up time determination subunit is configured to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load-up time.

[0024] In some embodiments, the load-up start time determination unit is further configured to determine a time before the load-up start time as an advance power generation time, and a time after the load-up start time as a delay power generation time;

[0025] The system further comprises:

[0026] A load increase benefit comparison module is used to calculate the load increase power generation benefits of the load increase power generation starting from the advance power generation time, the load increase start time and the delayed power generation time respectively; wherein the duration of the load increase power generation is the load increase time;

[0027] The load-increasing power generation unit is further used to control the fuel cell to start power generation when the power generation start time corresponding to the maximum load-increasing power generation benefit is determined.

[0028] In some embodiments, the load reduction control module includes:

[0029] a load shedding benefit calculation unit, configured to use the start time of the second period as a reference point for the load shedding end time, and to obtain the load shedding benefit curve using a linear function according to the reference point for the load shedding end time and the maximum load increase speed allowed by the system;

[0030] a load shedding time determining unit, configured to determine the load shedding time according to the load shedding yield curve;

[0031] A load shedding start time determination unit, used to determine the load shedding start time of the load shedding time;

[0032] The load reduction power generation unit is used to control the fuel cell to reduce the power generation power at the start of the load reduction until the load reduction power is reached.

[0033] In some embodiments, the load shedding benefit calculation unit includes:

[0034] A load shedding benefit calculation subunit, configured to calculate a benefit curve corresponding to the load shedding end time in each candidate time period according to the linear function;

[0035] The load shedding time determining unit comprises:

[0036] The load shedding time determining subunit is used to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load shedding time.

[0037] In some embodiments, the load shedding start time determining unit is further configured to determine a time before the load shedding start time as an advanced load shedding time, and a time after the load shedding start time as a delayed load shedding time;

[0038] The system further comprises:

[0039] A load shedding benefit comparison module is used to respectively calculate the load shedding power generation state benefits of starting the load shedding power generation from the advance load shedding moment, the load shedding start moment, and the delayed load shedding moment; wherein the duration of the load shedding power generation is the load shedding time;

[0040] The load reduction power generation unit is further used to control the fuel cell to reduce the power generation power when determining the load reduction start time corresponding to the maximum load reduction power generation state benefit, until the load reduction power is reached.

[0041] In some embodiments, the system further comprises:

[0042] A load increase control unit, configured to, after determining the load increase benefit curve, set the interval of 0.5 hours before and after the load increase benefit curve as a load increase area, and perform load increase power generation in the load increase area;

[0043] The load reduction control unit is used to, after determining the load reduction benefit curve, set the interval of 0.5 hours before and after the load reduction benefit curve as a load reduction area, and perform load reduction power generation in the load reduction area.

[0044] In some embodiments, the system further comprises: a total revenue calculation module, configured to calculate the total revenue of the fuel cell;

[0045] The total revenue calculation module includes:

[0046] A power benefit calculation unit, used to obtain a total power curve and a time-of-use electricity price curve within 24 hours, and calculate the power benefit according to the total power curve and the time-of-use electricity price curve;

[0047] The power gain is calculated as:

[0048]

[0049] Wherein, Pr is the power benefit, Ge is the total power curve, and P is the time-of-use electricity price curve;

[0050] A fuel cost calculation unit, used to calculate the fuel gas cost of the fuel cell within the 24 hours;

[0051] The calculation formula of the gas cost is:

[0052]

[0053] Wherein, Fc is the gas cost, Pf is the gas price, Yb is the coefficient of converting the standard gas flow into the working gas flow, and Fu is the gas consumption vector curve;

[0054] a net income calculation unit, configured to calculate the net income of the fuel cell within the 24 hours according to the power income and the fuel cost;

[0055] The net income is calculated as follows:

[0056]

[0057] Wherein, Tr is the net income, C1 is the fixed cost of the fuel cell, and C2 is the maintenance cost per unit power generation of the fuel cell.

[0058] To achieve the above object, another aspect of the embodiment of the present application provides a fuel cell power generation control method, the method comprising the following steps:

[0059] Calculate the power generation state revenue and hot standby state revenue under each time-of-use electricity price;

[0060] Determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period;

[0061] determining a load increase benefit curve from the second period to the first period, and controlling the fuel cell to increase power generation according to the load increase benefit curve;

[0062] Determining a load reduction benefit curve from the first period to the second period, and controlling the fuel cell to reduce power generation according to the load reduction benefit curve;

[0063] The generated power corresponding to the end time of the load-up benefit curve is determined as the target power, and the fuel cell is controlled to generate power at the target power from the end time of the load-up benefit curve to the start time of the load-down benefit curve.

[0064] To achieve the above objective, another aspect of an embodiment of the present application provides an electronic device, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the above method when executing the computer program.

[0065] To achieve the above objective, another aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0066] The embodiments of the present application include at least the following beneficial effects:

[0067] The present application includes a revenue calculation module, which is used to calculate the revenue of the power generation state and the thermal standby state under each time-of-use electricity price; a time period determination module, which is used to determine the time period in which the revenue of the power generation state is greater than the revenue of the thermal standby state as the first time period, and determine the time period in which the revenue of the power generation state is less than the revenue of the thermal standby state as the second time period; a load increase control module, which is used to determine the load increase revenue curve from the second time period to the first time period, and control the fuel cell to increase the power generation power according to the load increase revenue curve; a load reduction control module, which is used to determine the load reduction revenue curve from the first time period to the second time period, and control the fuel cell to reduce the power generation power according to the load reduction revenue curve; a target power generation module, which is used to determine the power generation power corresponding to the end time of the load increase revenue curve as the target power, and control the fuel cell to generate power at the target power from the end time of the load increase revenue curve to the start time of the load reduction revenue curve. By determining the revenue curve of the power generation state revenue and the thermal standby state revenue through the time-of-use electricity price, and then increasing and decreasing the load according to the corresponding revenue curve, the power generation during the peak period of electricity consumption can be increased and the power generation during the trough period of electricity consumption can be reduced, thereby improving the power generation efficiency of the fuel cell and reducing the waste of fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0069] Figure 1 A schematic diagram of the structure of a fuel cell power generation control system provided in an embodiment of the present application;

[0070] Figure 2 An example diagram of real-time electricity price and power curve provided in an embodiment of the present application;

[0071] Figure 3 A working flow chart of a fuel cell power generation control system provided in an embodiment of the present application;

[0072] Figure 4 A schematic diagram of a flow chart of a fuel cell power generation control method provided in an embodiment of the present application;

[0073] Figure 5 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0075] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0076] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0078] Before describing the embodiments of the present application in detail, the relevant technologies, some nouns and terms involved in the embodiments of the present application are first described. The relevant technologies, nouns and terms involved in the embodiments of the present application are subject to the following explanations:

[0079] Solid oxide fuel cells need to be heated to generate electricity at relatively high temperatures, usually in the range of 800-1000°C. They should not be cooled when not generating electricity, but should be kept stable within a certain temperature range (i.e., heat preservation) so that they can generate electricity at any time. If they are cooled when not generating electricity, then when electricity generation is required, the temperature of the fuel cell cannot be raised to the power generation temperature in a short time. Therefore, the temperature of the fuel cell needs to be maintained when not generating electricity.

[0080] The power generation state benefit refers to the benefit obtained when the fuel cell works in the power generation state, and the hot standby state benefit refers to the benefit obtained when the fuel cell works in the heat preservation state.

[0081] Load increase refers to the process of the fuel cell from the insulation state to the target power state, and load reduction refers to the process from the target power state to the insulation state.

[0082] Reference Figure 1 , the embodiment of the present application provides a fuel cell power generation control system, the system comprising:

[0083] The revenue calculation module is used to calculate the revenue of the power generation state and the revenue of the hot standby state under each time-of-use electricity price;

[0084] a time period determination module, configured to determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period;

[0085] A load increase control module, used to determine a load increase benefit curve from the second period to the first period, and control the fuel cell to increase power generation according to the load increase benefit curve;

[0086] a load reduction control module, configured to determine a load reduction benefit curve from the first period to the second period, and control the fuel cell to reduce power generation according to the load reduction benefit curve;

[0087] The target power generation module is used to determine the power generation corresponding to the end time of the load-up benefit curve as the target power, and control the fuel cell to generate power at the target power from the end time of the load-up benefit curve to the start time of the load-down benefit curve.

[0088] Specifically, the load-up benefit curve and the load-down benefit curve are respectively the benefit curve corresponding to the fuel cell load-up process and the benefit curve corresponding to the load-down process; the end time of the load-up benefit curve is the load-up end time t1, and the start time of the load-down benefit curve is the load-down start time t2; the load-up start time is the time when the load is increased from the non-power generation state, and the load-down start time is the time when the load is reduced from the target power.

[0089] It is understandable that electricity demand has peak and trough periods, and electricity prices vary over time, so the power generation status revenue will vary over time. The revenue calculation module can calculate the power generation status revenue and hot standby status revenue under each time-of-use electricity price.

[0090] In this embodiment, the fuel cell is controlled with a set time period as a cycle. One cycle may be one day, one week or one month. The specific duration may be freely set according to actual conditions.

[0091] For example, this embodiment is described with one day (24 hours) as a cycle: the revenue calculation module traverses the revenue of the power generation state and the thermal standby state for 24 hours, and the time period determination module determines the first time period when the revenue of the power generation state is greater than the revenue of the thermal standby state and the second time period when the revenue of the power generation state is less than the revenue of the thermal standby state. Then, the load increase revenue curve from the second time period to the first time period is determined by the load increase control module, and the load reduction revenue curve from the first time period to the second time period is determined by the load reduction control module, so as to obtain the optimal time for the fuel cell to increase and reduce the load, improve the power generation efficiency and reduce fuel waste.

[0092] Among them, after the power generation of the fuel cell is increased to the target power, the target power generation module controls the fuel cell to generate power at the target power until the load reduction start time t2 is reached, and then the load reduction control module gradually reduces the power generation power of the fuel cell to the insulation state.

[0093] Furthermore, the load control module includes:

[0094] a load-raising benefit calculation unit, configured to use the start time of the first period as a reference point for the load-raising end time, and to obtain the load-raising benefit curve using a linear function according to the reference point for the load-raising end time and the maximum load-raising speed allowed by the system;

[0095] A loading time determining unit, used to determine the loading time according to the loading yield curve;

[0096] A load-up start time determination unit, used to determine the load-up start time of the load-up time;

[0097] The load-up power generation unit is used to control the fuel cell to start power generation at the load-up start time.

[0098] Furthermore, the load-up revenue calculation unit includes:

[0099] A load-up benefit calculation subunit, configured to calculate a benefit curve corresponding to the load-up end time in each candidate time period according to the linear function;

[0100] The load-up time determination unit includes:

[0101] The load-up time determination subunit is configured to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load-up time.

[0102] The load increase control module of this embodiment can compare the power generation state profit and the hot standby state profit under each time-of-use electricity price, obtain the load increase profit curve, and generate electricity according to the load increase profit curve.

[0103] Specifically, since the fuel cell cannot reach the specified power (target power) instantaneously, and the time-of-use electricity price changes at any time, the load-up time will affect the power generation state benefit. For example, the power generation state benefit at 6 o'clock and 7 o'clock is less than the hot standby state benefit, and the power generation state benefit at 8 o'clock is greater than the hot standby state benefit. At this time, 8 o'clock is selected as the time point of the target power. If the power generation state benefit at 7 o'clock is the highest at 50% of the target power, the load-up time can be selected as 2 hours; if the hot standby state benefit is the highest at 7 o'clock, the load-up time can be selected as 1 hour.

[0104] Specifically, when the second period is converted to the first period, the maximum load-raising benefit curve is obtained, wherein the start time of the first first period in the traversal process is used as the time point of the target power (the load-raising end time t1), and then the time for changing from the insulation state to the target power state is determined through the power generation interval, that is, the load-raising time: first determine the linear function, and then determine the load-raising time (1h, 2h, 3h, 4h), so as to obtain different power generation intervals.

[0105] The linear function may be a direct proportional function or a piecewise function. In the present embodiment, a direct proportional function may be selected.

[0106] To make this embodiment clearer, an example is given. For example, when the time point of the target power is determined (the load end time t1) and the linear function is a proportional function, candidate time periods of 1h, 2h, 3h, and 4h are selected, and the benefits obtained by the fuel cell in the four candidate time periods are respectively integrated and calculated, and the candidate time period corresponding to the maximum benefit is selected as the load time for the fuel cell to transition from the insulation state to the target power state.

[0107] Furthermore, the load-up start time determination unit is further used to determine the time before the load-up start time as the advance power generation time, and determine the time after the load-up start time as the delay power generation time;

[0108] The system further comprises:

[0109] A load increase benefit comparison module is used to calculate the load increase power generation benefits of the load increase power generation starting from the advance power generation time, the load increase start time and the delayed power generation time respectively; wherein the duration of the load increase power generation is the load increase time;

[0110] The load-increasing power generation unit is further used to control the fuel cell to start power generation when the power generation start time corresponding to the maximum load-increasing power generation benefit is determined.

[0111] Specifically, this embodiment can obtain the corresponding benefits of the power generation interval determined according to the load increase time under early power generation, on-time power generation and delayed power generation as the load increase power generation benefit.

[0112] It should be noted that the loading time in this embodiment can be determined according to the loading maximum profit curve, or the profit curve corresponding to each candidate time period can be calculated by the loading profit calculation subunit, and then selected from the above-mentioned candidate time periods according to the calculated profit curve.

[0113] Exemplarily, since the size of the power generation state benefit and the thermal standby state benefit may change alternately many times within a certain period of time, this embodiment can calculate the benefit curve of the period from the time point when the first power generation state benefit is greater than the thermal standby state benefit. For example, if the duration of the period is one hour, this embodiment can determine the time point when the first power generation state benefit is greater than the thermal standby state benefit within the one hour, and calculate the benefit curve of the one hour from this time point. However, considering that there may be errors in calculating the benefit curve of the period from the time point when the first power generation state benefit is greater than the thermal standby state benefit, by judging the load increase time, that is, by calculating the benefits of early power generation, on-time power generation, and delayed power generation in the power generation interval, and starting power generation at the load increase start time with the maximum benefit, the error can be further reduced and the accuracy of the maximum benefit curve can be improved.

[0114] Specifically, according to the calculated optimal load-up time T1 and the first moment when the target power is reached (the end of load-up time) t1, and taking the moment when the target power is reached as the benchmark, the start time of the load-up for on-time power generation is t1-T1; the start time of the load-up for early power generation is t1-T1-1; the start time of the load-up for delayed power generation is t1-T1+1; the benefits of the three types of power generation are calculated, and the power generation mode with the greatest benefit is selected for power generation.

[0115] Furthermore, in a fuel cell, the revenue in the power generation state is equal to the revenue from electricity sales minus the gas cost in the power generation state; the revenue in the hot standby state is equal to zero minus the gas cost in the hot standby state. The revenue from electricity sales is the current electricity price*power generation, that is, the revenue in the power generation state is: the current electricity price*power generation-gas consumed in the power generation state*gas price; the revenue in the hot standby state is: gas consumed in the hot standby state*gas price. The power generation is the amount of electricity generated at the target power per unit time.

[0116] This embodiment can also be used in a fuel cell system with a waste heat recovery device. In a system with waste heat recovery, the revenue in the power generation state is equal to the revenue from electricity sales plus the revenue from heat sales in the power generation state minus the gas cost in the power generation state; the revenue in the hot standby state is equal to the revenue from heat sales in the hot standby state minus the gas cost in the hot standby state. The revenue from electricity sales is the revenue obtained from power generation at this electricity price. The revenue from heat sales in the power generation state refers to the revenue obtained by the fuel cell recovering heat through the waste heat recovery device in the power generation state, and the revenue from heat sales in the hot standby state refers to the revenue obtained by the fuel cell recovering heat through the waste heat recovery device in the hot standby state.

[0117] Among them, the income from electricity sales is the current electricity price * power generation, and the power generation is the amount of electricity generated at the target power per unit time. The income from heat sales in the power generation state is the heat price * the amount of heat generated in the power generation state, and the income from heat sales in the hot standby state is the heat price * the amount of heat generated in the hot standby state, where the heat price is the current heating price in the city. It should be noted that due to the different power generation powers in the power generation state and the hot standby state, the heat generated will also be different, and the amount of gas consumed will also be different. Therefore, the income from electricity sales, heat sales, and gas costs are also different in the two states.

[0118] Furthermore, the load reduction control module includes:

[0119] a load shedding benefit calculation unit, configured to use the start time of the second period as a reference point for the load shedding end time, and to obtain the load shedding benefit curve using a linear function according to the reference point for the load shedding end time and the maximum load increase speed allowed by the system;

[0120] a load shedding time determining unit, configured to determine the load shedding time according to the load shedding yield curve;

[0121] A load shedding start time determination unit, used to determine the load shedding start time of the load shedding time;

[0122] The load reduction power generation unit is used to control the fuel cell to reduce the power generation power at the start of the load reduction until the load reduction power is reached.

[0123] It should be noted that the load reduction power is the power when the fuel cell enters the insulation state. The power in the insulation state is 0. At this time, the fuel cell does not generate electricity, but the fuel cell still needs to consume gas for insulation.

[0124] Furthermore, the load shedding benefit calculation unit includes:

[0125] A load shedding benefit calculation subunit, configured to calculate a benefit curve corresponding to the load shedding end time in each candidate time period according to the linear function;

[0126] Furthermore, the load shedding time determining unit includes:

[0127] The load shedding time determining subunit is used to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load shedding time.

[0128] The difference from the above-mentioned embodiment of the load increase control module is that the embodiment of the load reduction control module is to reduce the power generation power from the target power until the heat preservation state is reached, while the embodiment of the load increase control module is to increase the power generation power from the heat preservation state until the target power is reached; this embodiment can determine the time period (second period) when the benefit of the hot standby state is greater than the benefit of the power generation state, and the load reduction time when the benefit of the hot standby state is greater than the benefit of the power generation state. The specific implementation of this embodiment can refer to the above-mentioned embodiment of the load increase control module.

[0129] Furthermore, the load shedding start time determination unit is further configured to determine a time before the load shedding start time as an advanced load shedding time, and a time after the load shedding start time as a delayed load shedding time;

[0130] The system further comprises:

[0131] A load shedding benefit comparison module is used to respectively calculate the load shedding power generation state benefits of starting the load shedding power generation from the advance load shedding moment, the load shedding start moment, and the delayed load shedding moment; wherein the duration of the load shedding power generation is the load shedding time;

[0132] The load reduction power generation unit is further used to control the fuel cell to reduce the power generation power when determining the load reduction start time corresponding to the maximum load reduction power generation state benefit, until the load reduction power is reached.

[0133] It should be noted that the load shedding time of this embodiment can be determined according to the load shedding maximum benefit curve, or can be obtained by screening from the above-mentioned candidate time periods according to the benefit curves corresponding to the candidate time periods in the load shedding benefit calculation subunit.

[0134] Similarly, considering that there may be errors in determining the end time of load shedding based on the time point when the first non-generation power is greater than the generation power, the benefits of early load shedding, on-time load shedding and delayed load shedding in the generation interval corresponding to the load shedding time are calculated as the load shedding power generation state benefit, and the load shedding power generation state benefit is started at the load shedding start time when the load shedding power generation state benefit is the largest, which can further reduce the error and improve the accuracy of the maximum benefit curve.

[0135] Exemplarily, if the optimal load reduction time T2 and the load reduction start time t2 from the target power are determined, based on the obtained load reduction start time t2, the end time of on-time load reduction is t2+T2; the end time of early load reduction is t2+T2-1; and the end time of delayed load reduction is t2+T2+1.

[0136] Furthermore, the system of the embodiment of the present application also includes:

[0137] A load increase control unit, configured to, after determining the load increase benefit curve, set the interval of 0.5 hours before and after the load increase benefit curve as a load increase area, and perform load increase power generation in the load increase area;

[0138] The load reduction control unit is used to, after determining the load reduction benefit curve, set the interval of 0.5 hours before and after the load reduction benefit curve as a load reduction area, and perform load reduction power generation in the load reduction area.

[0139] It is taken into consideration that there may be some changes in demand during the actual system operation. For example, during the process of load increase or load decrease, the current power needs to be temporarily maintained for a period of time, and then the load increase or load decrease power generation will begin after a period of time. Therefore, after the load increase profit curve or the load decrease profit curve is determined, changes will be made according to demand within the load increase area or the load decrease area. Coordinating with changes in demand may reduce some power generation revenue.

[0140] The system of the embodiment of the present application can achieve relatively high benefits by setting the interval of 0.5 hours while coordinating with the changes in demand.

[0141] Furthermore, the system of the embodiment of the present application also includes:

[0142] The total revenue calculation module is used to calculate the total revenue of the fuel cell.

[0143] It can be understood that the total revenue calculation module of this embodiment can calculate the total revenue of power generation of the fuel cell after being controlled by the power generation control system.

[0144] Furthermore, the total revenue calculation module includes:

[0145] A power benefit calculation unit, used to obtain a total power curve and a time-of-use electricity price curve within 24 hours, and calculate the power benefit according to the total power curve and the time-of-use electricity price curve;

[0146] The power gain is calculated as:

[0147]

[0148] Wherein, Pr is the power benefit, Ge is the total power curve, and P is the time-of-use electricity price curve;

[0149] A fuel cost calculation unit, used to calculate the fuel gas cost of the fuel cell within the 24 hours;

[0150] The calculation formula of the gas cost is:

[0151]

[0152] Wherein, Fc is the gas cost, Pf is the gas price, Yb is the coefficient of converting the standard gas flow into the working gas flow, and Fu is the gas consumption vector curve;

[0153] a net income calculation unit, configured to calculate the net income of the fuel cell within the 24 hours according to the power income and the fuel cost;

[0154] The net income is calculated as follows:

[0155]

[0156] Wherein, Tr is the net income, C1 is the fixed cost of the fuel cell, and C2 is the maintenance cost per unit power generation of the fuel cell.

[0157] Specifically, after the fuel cell reaches the target power, it generates electricity at the target power for a period of time, and then reduces the load, that is, after the load-up power curve and the load-down power curve are determined, it generates electricity at the target power state between the load-up power curve and the load-down power curve. At this time, the trapezoidal area integrated by the load-up power curve, the target power straight line and the load-down power curve is calculated (example figure as shown in Figure 2 As shown), the trapezoidal area is the total power generation power. Figure 2 In the figure, t1 is the time point of the target power (the end time of load increase); t2 is the time point of starting to reduce the generated power (the start time of load reduction).

[0158] The calculation formula for calculating total revenue includes:

[0159] 1. Calculate the total power generation revenue (i.e. power revenue):

[0160] Among them, Pr is the power revenue, Ge is the calculated total power curve, that is, the curve after the integration of the load-up power curve, the target power straight line and the load-down power curve; P is the time-of-use electricity price curve.

[0161] 2. Calculate the total gas consumption (actual gas consumption cost):

[0162] Among them, Fc is the gas cost, Pf is the gas price, Yb is the coefficient for converting the standard gas flow into the operating natural gas flow; Fu is the gas consumption vector curve, that is, the fuel consumed in real time. The greater the power, the more fuel is consumed.

[0163] 3. Calculate the net income:

[0164] Among them, C1 is the fixed cost of the fuel cell, and C2 is the maintenance cost of the fuel cell per unit power generation.

[0165] The current profit of the fuel cell when operating according to the total power curve can be obtained according to the net profit Tr.

[0166] The embodiment of the present application traverses each time-of-use electricity price, calculates the power generation state profit and the thermal standby state profit under each time-of-use electricity price, and obtains the maximum load increase profit curve when the first power generation state profit is greater than the thermal standby state profit of the time-of-use electricity price. Similarly, the maximum load reduction profit curve is obtained when the first thermal standby state profit is greater than the power generation state profit of the time-of-use electricity price after the load is increased. In this way, the fuel cell can generate electricity (load increase) when the time-of-use electricity price is high and keep warm (load reduction) when the time-of-use electricity price is low, thereby further reducing the power generation cost of the fuel cell and improving the power generation efficiency.

[0167] Next, the solution of the embodiment of the present application will be described in detail and explained in conjunction with specific application examples:

[0168] Reference Figure 3 , this embodiment provides a work flow chart of a fuel cell power generation control system, the work flow of the system includes:

[0169] Specifically, the fuel cost calculation unit calculates the fuel cell's gas cost within 24 hours and initializes the gas consumption vector curve.

[0170] The profit calculation module compares the profit of power generation state and non-power generation (insulation) at each time point under the time-sharing electricity price to decide whether to generate electricity; the profit calculation of power generation state under the time-sharing electricity price is as follows: the current electricity price * power generation - gas consumed for target power generation * gas price; the profit of hot standby state under the time-sharing electricity price (insulation loss): gas consumption in the insulation state * gas price. When the profit of power generation state is greater than the insulation loss, power generation is selected.

[0171] The time period determination module determines the first moment when the benefit of the power generation state is greater than the benefit of the hot standby state as the load-up end time t1. The load-up benefit calculation subunit obtains the benefits of different candidate time periods based on the load-up end time t1, and selects the candidate time period with the maximum benefit as the load-up time for transitioning from the insulation state to the target power state; the candidate time periods T1 are selected to be 1h, 2h, 3h, and 4h, respectively, and the benefits of power generation in the four candidate time periods T1 are respectively calculated by integration, and the candidate time period corresponding to the maximum benefit is selected as the load-up time for the fuel cell to transition from the insulation state to the target power state.

[0172] According to the load-raising time T1 calculated by the load-raising benefit calculation subunit, taking the load-raising end time t1 of the time period determination module as the benchmark, the load-raising start time for on-time power generation is t1-T1; the load-raising start time for early power generation is t1-T1-1; the load-raising start time for delayed power generation is t1-T1+1; the load-raising benefit comparison module calculates the benefits of the three types of power generation, and the load-raising power generation unit selects the power generation mode with the largest benefit to generate electricity.

[0173] Specifically, the revenue calculation module compares the revenue of the power generation state and the revenue of no power generation (insulation) at each time point under the time-sharing electricity price to decide whether not to generate electricity; the revenue calculation of the power generation state under the time-sharing electricity price is: the current electricity price * the power generation power - the gas consumed for target power generation * the gas price; the revenue of the hot standby state under the time-sharing electricity price (insulation loss): the gas consumed in the insulation state * the gas price. When the revenue of the power generation state is less than the insulation loss, no power generation will be generated, and the time of no power generation is t2.

[0174] The time period determination module determines the moment when the first hot standby state benefit is greater than the power generation state benefit as the load reduction end time, and the load reduction benefit calculation subunit obtains the load reduction benefits of different candidate time periods based on the load reduction end time. The load reduction time determination subunit selects the candidate time period with the maximum load reduction benefit as the load reduction time for switching from the target power state to the insulation state; the candidate time periods T2 are selected as 1h, 2h, 3h, and 4h respectively, and the load reduction start time t2 is determined by the load reduction start time determination unit, and the benefits corresponding to the four candidate time periods T2 are respectively integrated and calculated, and the load reduction time determination subunit selects the candidate time period corresponding to the maximum benefit as the load reduction time for the fuel cell to switch from the target power state to the insulation state.

[0175] According to the load shedding time T2 calculated by the load shedding time determination subunit, taking the load shedding start time t2 calculated by the load shedding start time determination unit as the benchmark, the end time of on-time load shedding is t2+T2; the end time of early load shedding is t2+T2-1; the end time of delayed load shedding is t2+T2+1; the load shedding benefit comparison module calculates the benefits of the three types of load shedding, and the load shedding power generation unit selects the load shedding mode with the greatest benefit to carry out load shedding and heat preservation.

[0176] Compared with the existing power generation control system that continuously generates power at the target, resulting in redundant power generation and waste of fuel, the fuel cell power generation control system of this embodiment can obtain the maximum benefit based on hourly optimization. When the time-of-use electricity prices are known, the power generation state benefit and the hot standby state benefit of each time period are calculated by traversing to control whether the fuel cell generates power in this time period, and then the power generation curve can be obtained. According to the power generation curve, when the target power generation is reached, the optimal rise time (load increase time) is determined, and then the optimal load increase start time is calculated. After the load increase module is calculated, the load reduction module calculates the optimal load reduction start time by the corresponding calculation method, and then the power generation power curve of the fuel cell can be obtained. The power generation control system controls the power generation of the fuel cell according to the power generation power curve, which can obtain the maximum benefit and improve the power generation cost and efficiency of the fuel cell power generation control system.

[0177] Reference Figure 4 The embodiment of the present application also provides a fuel cell power generation control method, which includes S400 to S430 (the step numbers are only used to distinguish different steps, and the embodiment of the present application does not limit the execution order of each step):

[0178] S400: Calculating the power generation state profit and the hot standby state profit under each time-of-use electricity price;

[0179] S410: Determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period;

[0180] S420: determining a load increase benefit curve from the second period to the first period, and controlling the fuel cell to increase power generation according to the load increase benefit curve;

[0181] S430: determining a load reduction benefit curve from the first period to the second period, and controlling the fuel cell to reduce power generation according to the load reduction benefit curve;

[0182] S440: Determine the generated power corresponding to the end time of the load-up maximum benefit curve as the target power, and control the fuel cell to generate power at the target power from the end time of the load-up maximum benefit curve to the start time of the load-down maximum benefit curve.

[0183] It can be understood that the contents of the above system embodiments are all applicable to the present method embodiments, the functions specifically implemented by the present method embodiments are the same as those of the above system embodiments, and the beneficial effects achieved are also the same as those achieved by the above system embodiments.

[0184] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above fuel cell power generation control method when executing the computer program. The electronic device can be any smart terminal including a tablet computer, a car computer, etc.

[0185] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0186] See also Figure 5 , Figure 5 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0187] The processor 501 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0188] The memory 502 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 502 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 502, and the processor 501 calls and executes the fuel cell power generation control method of the embodiment of this application;

[0189] Input / output interface 503, used to implement information input and output;

[0190] Communication interface 504, used to realize communication interaction between the device and other devices, which can be realized by wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0191] A bus 505 that transmits information between the various components of the device (e.g., the processor 501, the memory 502, the input / output interface 503, and the communication interface 504);

[0192] The processor 501 , the memory 502 , the input / output interface 503 and the communication interface 504 are connected to each other in communication within the device via the bus 505 .

[0193] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned fuel cell power generation control method is implemented.

[0194] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0195] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0196] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0197] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0198] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0199] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0200] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0201] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0202] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0203] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0204] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0205] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0206] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A fuel cell power generation control system, characterized in that: The system comprises: The revenue calculation module is used to calculate the revenue of the power generation state and the revenue of the hot standby state under each time-of-use electricity price; a time period determination module, configured to determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period; A load increase control module, used to determine a load increase benefit curve from the second period to the first period, and control the fuel cell to increase power generation according to the load increase benefit curve; a load reduction control module, configured to determine a load reduction benefit curve from the first period to the second period, and control the fuel cell to reduce power generation according to the load reduction benefit curve; The target power generation module is used to determine the power generation corresponding to the end time of the load-up benefit curve as the target power, and control the fuel cell to generate power at the target power from the end time of the load-up benefit curve to the start time of the load-down benefit curve.

2. A fuel cell power generation control system according to claim 1, characterized in that: The power generation income is equal to the electricity sales income minus the gas cost in the power generation state; The hot standby state benefit is equal to zero minus the gas cost in the hot standby state.

3. A fuel cell power generation control system according to claim 2, characterized in that: The revenue in the power generation state is equal to the revenue from electricity sales plus the revenue from heat sales in the power generation state minus the gas cost in the power generation state; The thermal standby state revenue is equal to the heat sales revenue in the thermal standby state minus the gas cost in the thermal standby state.

4. A fuel cell power generation control system according to claim 1, characterized in that: The load control module comprises: a load-raising benefit calculation unit, configured to use the start time of the first period as a reference point for the load-raising end time, and to obtain the load-raising benefit curve using a linear function according to the reference point for the load-raising end time and the maximum load-raising speed allowed by the system; A loading time determining unit, used to determine the loading time according to the loading yield curve; A load-up start time determination unit, used to determine the load-up start time of the load-up time; The load-up power generation unit is used to control the fuel cell to start power generation at the load-up start time.

5. A fuel cell power generation control system according to claim 4, characterized in that: The load increase revenue calculation unit includes: A load-up benefit calculation subunit, configured to calculate a benefit curve corresponding to the load-up end time in each candidate time period according to the linear function; The load-up time determination unit comprises: The load-up time determination subunit is configured to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load-up time.

6. A fuel cell power generation control system according to claim 4, characterized in that: The load-up start time determination unit is further used to determine the time before the load-up start time as the advance power generation time, and determine the time after the load-up start time as the delay power generation time; The system further comprises: A load increase benefit comparison module is used to calculate the load increase power generation benefits of the load increase power generation starting from the advance power generation time, the load increase start time and the delayed power generation time respectively; wherein the duration of the load increase power generation is the load increase time; The load-increasing power generation unit is further used to control the fuel cell to start power generation when the power generation start time corresponding to the maximum load-increasing power generation benefit is determined.

7. A fuel cell power generation control system according to claim 1, characterized in that: The load reduction control module comprises: a load shedding benefit calculation unit, configured to use the start time of the second period as a reference point for the load shedding end time, and to obtain the load shedding benefit curve using a linear function according to the reference point for the load shedding end time and the maximum load increase speed allowed by the system; a load shedding time determining unit, configured to determine the load shedding time according to the load shedding yield curve; A load shedding start time determination unit, used to determine the load shedding start time of the load shedding time; The load reduction power generation unit is used to control the fuel cell to reduce the power generation power at the start of the load reduction until the load reduction power is reached.

8. A fuel cell power generation control system according to claim 7, characterized in that: The load shedding benefit calculation unit includes: A load shedding benefit calculation subunit, configured to calculate a benefit curve corresponding to the load shedding end time in each candidate time period according to the linear function; The load shedding time determining unit comprises: The load shedding time determining subunit is used to determine the candidate time period corresponding to the revenue curve for obtaining the maximum revenue as the load shedding time.

9. A fuel cell power generation control system according to claim 7, characterized in that: The load shedding start time determination unit is further configured to determine a time before the load shedding start time as an advanced load shedding time, and a time after the load shedding start time as a delayed load shedding time; The system further comprises: A load shedding benefit comparison module is used to respectively calculate the load shedding power generation state benefits of starting the load shedding power generation from the advance load shedding moment, the load shedding start moment, and the delayed load shedding moment; wherein the duration of the load shedding power generation is the load shedding time; The load reduction power generation unit is further used to control the fuel cell to reduce the power generation power when determining the load reduction start time corresponding to the maximum load reduction power generation state benefit, until the load reduction power is reached.

10. A fuel cell power generation control system according to claim 1, characterized in that: The system further comprises: A load increase control unit, configured to, after determining the load increase benefit curve, set the interval of 0.5 hours before and after the load increase benefit curve as a load increase area, and perform load increase power generation in the load increase area; The load reduction control unit is used to, after determining the load reduction benefit curve, set the interval of 0.5 hours before and after the load reduction benefit curve as a load reduction area, and perform load reduction power generation in the load reduction area.

11. A fuel cell power generation control system according to any one of claims 1 to 10, characterized in that: The system further comprises: a total revenue calculation module, configured to calculate the total revenue of the fuel cell; The total revenue calculation module includes: A power benefit calculation unit, used to obtain a total power curve and a time-of-use electricity price curve within 24 hours, and calculate the power benefit according to the total power curve and the time-of-use electricity price curve; The power gain is calculated as: Wherein, Pr is the power benefit, Ge is the total power curve, and P is the time-of-use electricity price curve; A fuel cost calculation unit, used to calculate the fuel gas cost of the fuel cell within the 24 hours; The calculation formula of the gas cost is: Wherein, Fc is the gas cost, Pf is the gas price, Yb is the coefficient of converting the standard gas flow into the working gas flow, and Fu is the gas consumption vector curve; a net income calculation unit, configured to calculate the net income of the fuel cell within the 24 hours according to the power income and the fuel cost; The net income is calculated as follows: Wherein, Tr is the net income, C1 is the fixed cost of the fuel cell, and C2 is the maintenance cost per unit power generation of the fuel cell.

12. A fuel cell power generation control method, characterized in that: The method comprises the following steps: Calculate the power generation state revenue and hot standby state revenue under each time-of-use electricity price; Determine a time period in which the power generation state benefit is greater than the thermal standby state benefit as a first time period, and determine a time period in which the power generation state benefit is less than the thermal standby state benefit as a second time period; determining a load increase benefit curve from the second period to the first period, and controlling the fuel cell to increase power generation according to the load increase benefit curve; Determining a load reduction benefit curve from the first period to the second period, and controlling the fuel cell to reduce power generation according to the load reduction benefit curve; The generated power corresponding to the end time of the load-up benefit curve is determined as the target power, and the fuel cell is controlled to generate power at the target power from the end time of the load-up benefit curve to the start time of the load-down benefit curve.

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