A method and system for predicting the income of a combined fire and storage system participating in a frequency modulation market

Abstract

The present invention discloses a method and system for predicting the benefits of a combined thermal energy storage system participating in the frequency regulation market, which belongs to the field of frequency regulation benefits of thermal power plants, and aims to solve the problem that there is no accurate method for predicting the benefits of a combined thermal energy storage system participating in the frequency regulation market based on all-scenario operation simulation in the prior art. The present invention uses the single-day actual response data of independent thermal power to AGC instructions to reversely infer the average standard regulation rate of the AGC power generation units in the area on that day; simulates the setting of electrochemical energy storage equipment with specified power and capacity, and forms a combined thermal energy storage system with thermal power, and simulates a variety of actual operating conditions to participate in the AGC frequency regulation response of the day; calculates the frequency regulation performance index and frequency regulation mileage of the combined thermal energy storage system participating in the single-day AGC response, and calculates the single-day frequency regulation mileage benefits. The algorithm flow of the present invention is concise and the calculation accuracy is high, which provides a certain reference value for the construction of electrochemical energy storage in thermal power plants and the participation of combined thermal energy storage systems in the auxiliary service market.

Description

Technical Field

[0001] The present invention belongs to the field of frequency regulation revenue of thermal power plants, and relates to a method and system for predicting revenue of a thermal power plant combined system participating in a frequency regulation market. Background Art

[0002] With the gradual advancement of electricity market reform, provinces are gradually carrying out pilot projects and construction of ancillary service markets.

[0003] At present, all existing thermal power plants are participants in the frequency regulation market. However, due to the characteristics of thermal power, the frequency regulation performance indicators are generally low, which makes it impossible for many actual frequency regulation mileages to be included in the subsidy scope and obtain considerable benefits. Therefore, building a certain capacity of electrochemical energy storage in a thermal power plant to form a thermal power-electrochemical energy storage combined system (hereinafter referred to as the thermal storage combined system) is an important way to increase the frequency regulation benefits of thermal power plants.

[0004] There have been some studies on the supporting operation and control methods of the combined thermal energy storage system, but there are relatively few studies on how to simulate the actual frequency regulation situation of the combined thermal energy storage system in detail to accurately obtain the increase in the frequency regulation revenue of the thermal power plant before and after the construction of energy storage, and then determine the optimal capacity of energy storage. The main reason is that there is currently no accurate profit calculation method for the combined thermal energy storage system participating in the frequency regulation market based on the operation simulation of all situations. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that there is no accurate profit prediction method for a combined fire-storage system participating in the frequency regulation market based on all-scenario operation simulation in the prior art, and to provide a profit prediction method and system for a combined fire-storage system participating in the frequency regulation market.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention proposes a method for predicting the income of a combined fire and storage system participating in a frequency modulation market, comprising the following steps:

[0008] Obtain the AGC command response record of the combined thermal energy storage system (without energy storage) participating in the auxiliary service and the revenue of the combined thermal energy storage system (without energy storage) on that day;

[0009] According to the auxiliary service AGC command response record, the average standard regulation rate of the AGC power generation unit in the area on that day is obtained;

[0010] Select scenarios for the combined thermal and energy storage system (including energy storage) and calculate frequency regulation performance indicators based on the scenarios and average standard regulation rates;

[0011] Calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day based on the frequency regulation performance index;

[0012] Based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the income of the combined fire-storage system (without energy storage), the incremental frequency regulation mileage income of the combined fire-storage system (including energy storage) on that day is obtained to realize the income forecast of the frequency regulation market.

[0013] Preferably, the AGC instruction response record of the combined fire and energy storage system (without energy storage) participating in the auxiliary service on that day includes the following parameters: output of the combined fire and energy storage system (without energy storage) at the beginning of period t ; Output of the combined thermal energy storage system (without energy storage) at the end of period t ; AGC command value during period t ; Rate index of the combined thermal energy storage system (without energy storage) responding to the AGC command on that day ; Time delay index of the combined thermal energy storage system (without energy storage) responding to the AGC control command on that day ; Accuracy index of the fire-storage combined system (without energy storage) responding to AGC control instructions .

[0014] Preferably, the average standard regulation rate of the AGC power generation unit in the region on that day is calculated as follows:

[0015] Regulation rate of the combined fire and energy storage system (without energy storage) at each time period of the day ;in, for The length of the session;

[0016] Adjustment rate of the combined fire and energy storage system (without energy storage) at each time period of the day Weighted to get the comprehensive regulation rate of the day ;

[0017] The average standard regulation rate of the AGC power generation unit in the region on that day The calculation is as follows:

[0018]

[0019] in, It is the rate indicator of the combined fire-storage system (without energy storage) responding to the AGC command on that day.

[0020] Preferably, the frequency modulation performance index is calculated according to the scene and the average standard modulation rate as follows:

[0021] Scenario 1: Energy storage immediately and fully meets the AGC directive requirements:

[0022]

[0023]

[0024]

[0025] Scenario 2: The energy storage cannot immediately meet the AGC instruction, but the combined thermal power and energy storage system meets the instruction under the regulation of thermal power:

[0026]

[0027]

[0028]

[0029] in, The time required for the combined thermal and energy storage system (including energy storage) to reach the AGC command target value;

[0030] Scenario 3: Energy storage cannot immediately meet AGC instructions:

[0031]

[0032]

[0033]

[0034] in, is the maximum difference of the AGC instruction in the time period t, It is the rated output of the combined fire and storage system;

[0035] Scenario 4: Energy storage immediately meets the AGC instruction, the thermal power output direction is opposite to the AGC adjustment direction, and the thermal-storage combined system cannot be adjusted to the instruction value:

[0036]

[0037]

[0038]

[0039] in, It is the rate indicator of the thermal energy storage combined system (including energy storage) responding to the AGC command. It is the time delay index of the thermal energy storage combined system (including energy storage) responding to the AGC control command. It is the accuracy index of the combined thermal-storage system (including energy storage) in responding to AGC control instructions.

[0040] Preferably, the comprehensive frequency regulation performance index and frequency regulation mileage of the combined fire and energy storage system (including energy storage) on that day are as follows:

[0041] Comprehensive frequency regulation performance indicators of the combined thermal and energy storage system (including energy storage) on that day as follows:

[0042]

[0043] Frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day as follows:

[0044]

[0045] in, is the response curve of the combined thermal energy storage system (including energy storage) during period t, It is the response curve of the combined fire-storage system (including energy storage) in period t-1.

[0046] Preferably, the frequency regulation mileage revenue increment of the combined fire and energy storage system (including energy storage) on that day is as follows:

[0047] Increased frequency regulation mileage revenue of the combined thermal and energy storage system (including energy storage) on that day ;in, is the revenue of the combined thermal and energy storage system (without energy storage), It is the frequency regulation mileage income of the combined fire-storage system (including energy storage) on that day.

[0048] Preferably, the frequency regulation mileage income of the combined thermal energy storage system (including energy storage) on that day The calculation is as follows:

[0049]

[0050] Where C is the frequency modulation benefit per unit mileage.

[0051] The invention proposes a revenue forecasting system for a combined fire and storage system participating in a frequency modulation market, comprising:

[0052] A first parameter acquisition module, which is used to obtain the AGC instruction response record of the fire-storage combined system (without energy storage) participating in the auxiliary service and the income of the fire-storage combined system (without energy storage) on that day;

[0053] A second parameter acquisition module, the second parameter acquisition module is used to obtain the average standard regulation rate of the AGC power generation unit in the area on that day according to the auxiliary service AGC instruction response record;

[0054] A third parameter acquisition module, the third parameter acquisition module is used to select a scenario for the combined thermal energy storage system (including energy storage), and calculate the frequency regulation performance index according to the scenario and the average standard regulation rate;

[0055] A fourth parameter acquisition module, which is used to calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined fire-storage system (including energy storage) on that day according to the frequency regulation performance index;

[0056] The revenue prediction module is used to obtain the incremental frequency regulation mileage revenue of the combined fire and storage system (including energy storage) on the day based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the revenue of the combined fire and storage system (without energy storage), so as to realize the revenue prediction of the frequency regulation market.

[0057] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of a method for predicting the income of a combined fire-storage system participating in a frequency modulation market are implemented.

[0058] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for predicting the income of a combined fire-storage system participating in a frequency modulation market.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The present invention proposes a method for predicting the revenue of a combined thermal energy storage system participating in the frequency regulation market, which accurately completes the index statistics and revenue calculation of the combined thermal energy storage system participating in the AGC power grid frequency regulation auxiliary service market. The present invention is based on the idea of ​​multi-state simulation, combined with the power and capacity constraints of electrochemical energy storage, so that in the process of simulating the response to the AGC instruction, while making full use of the charging and discharging power of the electrochemical energy storage, the state of charge of the electrochemical energy storage can always be within a reasonable range, achieving the goal of optimizing charging and discharging. The method is based on the actual response of thermal power on the day, and can effectively simulate the daily charging and discharging curve of the electrochemical energy storage, the response curve of the combined thermal energy storage system, and accurately calculate the revenue of participating in the frequency regulation auxiliary service market, with a simple process and high calculation accuracy. It provides ideas for the optimal configuration of energy storage capacity when thermal power is combined with energy storage, and provides a certain reference value for the construction of electrochemical energy storage in thermal power plants and the participation of the combined thermal energy storage system in the auxiliary service market.

[0061] The present invention proposes a revenue prediction system for a combined fire-storage system participating in the frequency modulation market. By dividing the system into a first parameter acquisition module, a second parameter acquisition module, a third parameter acquisition module, a fourth parameter acquisition module and a revenue prediction module, a modular concept is adopted to make each module independent of each other, thereby facilitating unified management of each module. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0063] Figure 1This is a flow chart of the profit prediction method for the fire-storage combined system participating in the frequency modulation market of the present invention.

[0064] Figure 2 This is a flow chart of the profit algorithm of the multi-condition simulation of fire storage jointly participating in the frequency regulation market of the present invention.

[0065] Figure 3 Schematic diagram of AGC response in multiple scenarios of the present invention ((a) is scenario 1, (b) is scenario 2, (c) is scenario 3, and (d) is scenario 4).

[0066] Figure 4 This is a diagram of the electrochemical energy storage output power in the simulation example of the present invention.

[0067] Figure 5 This is the AGC instruction diagram of the fire-storage combined system responding to the present invention.

[0068] Figure 6 This is a diagram of the revenue prediction system for the fire-storage combined system of the present invention participating in the frequency modulation market. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0070] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0072] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0073] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0074] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0076] The present invention proposes a method for predicting the income of a combined fire and storage system participating in the frequency modulation market. Figure 1 As shown, the following steps are included:

[0077] S1. Obtain the AGC command response record of the combined fire-storage system (without energy storage) participating in auxiliary services and the revenue of the combined fire-storage system (without energy storage) on that day.

[0078] The AGC command response record of the combined fire and energy storage system (without energy storage) participating in auxiliary services on that day includes the following parameters: Output of the combined fire and energy storage system (without energy storage) at the beginning of period t ; Output of the combined thermal energy storage system (without energy storage) at the end of period t ; AGC command value during period t ; Rate index of the combined thermal energy storage system (without energy storage) responding to the AGC command on that day ; Time delay index of the combined thermal energy storage system (without energy storage) responding to the AGC control command on that day ; Accuracy index of the fire-storage combined system (without energy storage) responding to AGC control instructions .

[0079] S2. Obtain the average standard regulation rate of the AGC power generation unit in the area on that day based on the auxiliary service AGC command response record.

[0080] The average standard regulation rate of the AGC power generation unit in the region on that day The calculation is as follows:

[0081]

[0082] in, It is the rate index of the combined thermal energy storage system (without energy storage) responding to the AGC command on that day;

[0083] Regulation rate of the combined fire and energy storage system (without energy storage) at each time period of the day ;in, for The length of the session;

[0084] Adjustment rate of the combined fire and energy storage system (without energy storage) at each time period of the day Weighted to get the comprehensive regulation rate of the day .

[0085] S3. Select scenarios for the combined thermal and energy storage system (including energy storage) and calculate frequency regulation performance indicators based on the scenarios and average standard regulation rate.

[0086] The frequency regulation performance indicators are calculated based on the scenario and the average standard regulation rate as follows:

[0087] Scenario 1: Energy storage immediately and fully meets the AGC directive requirements:

[0088]

[0089]

[0090]

[0091] Scenario 2: The energy storage cannot immediately meet the AGC instruction, but the combined thermal power and energy storage system meets the instruction under the regulation of thermal power:

[0092]

[0093]

[0094]

[0095] in, The time required for the combined thermal and energy storage system (including energy storage) to reach the AGC command target value;

[0096] Scenario 3: Energy storage cannot immediately meet AGC instructions:

[0097]

[0098]

[0099]

[0100] in, is the maximum difference of the AGC instruction in the time period t, It is the rated output of the combined fire and storage system;

[0101] Scenario 4: Energy storage immediately meets the AGC instruction, the thermal power output direction is opposite to the AGC adjustment direction, and the thermal-storage combined system cannot be adjusted to the instruction value:

[0102]

[0103]

[0104]

[0105] in, It is the rate indicator of the thermal energy storage combined system (including energy storage) responding to the AGC command. It is the time delay index of the thermal energy storage combined system (including energy storage) responding to the AGC control command. It is the accuracy index of the combined thermal-storage system (including energy storage) in responding to AGC control instructions.

[0106] S4. Calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day based on the frequency regulation performance index.

[0107] The comprehensive frequency regulation performance indicators and frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day are as follows:

[0108] Comprehensive frequency regulation performance indicators of the combined thermal and energy storage system (including energy storage) on that day as follows:

[0109]

[0110] Frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day as follows:

[0111]

[0112] in, is the response curve of the combined thermal energy storage system (including energy storage) during period t, It is the response curve of the combined fire-storage system (including energy storage) in period t-1.

[0113] S5. Based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the revenue of the combined fire-storage system (without energy storage), the incremental frequency regulation mileage revenue of the combined fire-storage system (including energy storage) on that day is obtained to realize the revenue forecast of the frequency regulation market.

[0114] The incremental frequency regulation mileage revenue of the combined thermal energy storage system (including energy storage) on that day is as follows:

[0115] Frequency regulation mileage revenue of the combined thermal energy storage system (including energy storage) on the same day ;in, is the revenue of the combined thermal and energy storage system (without energy storage), It is the frequency regulation mileage income of the combined fire-storage system (including energy storage) on that day.

[0116] Frequency regulation mileage revenue of the combined thermal energy storage system (including energy storage) on the same day The calculation is as follows:

[0117]

[0118] Where C is the frequency modulation benefit per unit mileage.

[0119] The present invention proposes a method for predicting the income of a combined fire and storage system participating in the frequency modulation market. The flow chart is shown in Figure 2 As shown in the figure, the frequency regulation performance indicators and benefit calculation method of actual operation simulation under multiple conditions are used to calculate the benefits of the thermal-storage combined system participating in the frequency regulation auxiliary service market, which specifically includes the following steps:

[0120] Step 1: Divide the calculated day (the current day) into N time periods (a period is counted as a period when the AGC instruction changes significantly), and the current period is the t period, that is, t∈1~N. Input the detailed record of the response of the AGC instruction of the combined thermal energy storage system (without energy storage) participating in the auxiliary service on the current day, including:

[0121] Output of the combined thermal energy storage system (without energy storage) at the beginning of period t:

[0122] At the end of period t (i.e. the beginning of period t+1), the output of the combined thermal energy storage system (without energy storage) is:

[0123] During the period t, the AGC command value (i.e. the output value required by the command) is:

[0124] And the single-day frequency regulation performance indicators of the combined thermal energy storage system (without energy storage) in the frequency regulation auxiliary service market on that day, including:

[0125] Rate index of the combined thermal energy storage system (without energy storage) responding to the AGC command on that day

[0126] Time delay indicators of the combined thermal energy storage system (without energy storage) responding to the AGC control command on that day:

[0127] Accuracy index of the combined fire and energy storage system (without energy storage) responding to AGC control instructions:

[0128] Same-day frequency regulation mileage income of the combined thermal energy storage system (without energy storage) S1

[0129] Step 2: Calculate the regulation rate of the combined fire and energy storage system (without energy storage) at each time period of the day :

[0130] in, The length of time period t

[0131] Adjustment rate of the combined fire and energy storage system (without energy storage) at each time period of the day Weighted to get the comprehensive regulation rate of the day

[0132] The average standard regulation rate of the AGC power generation unit in the region on that day The calculation is as follows:

[0133]

[0134] Step 3: Set the maximum charge and discharge power of electrochemical energy storage And the maximum capacity parameter This is the rating on the battery label.

[0135] Step 4: Set the current period t=1.

[0136] Step 5: Verify that the combined thermal energy storage system (including energy storage) is in one of the following scenarios during period t. For details of different scenarios, see Figure 3 The verification method is:

[0137] In the plane rectangular coordinate system, with time as the horizontal axis and power as the vertical axis, three power curves are drawn within the time period t: 1) AGC command curve, ; 2) Response curve of the combined thermal energy storage system (without energy storage), namely ; 3) As the base point, the actual maximum response rate of the combined fire and energy storage system (including energy storage) in this period is the maximum slope, and the response curve of the combined fire and energy storage system (including energy storage) in this period is drawn .

[0138] Figure 3(a) is scenario 1, (b) is scenario 2, (c) is scenario 3, and (d) is scenario 4. Determine which of the four scenarios the three drawn power curves belong to. And calculate the frequency modulation performance index according to the actual scenario.

[0139] Among them, K1 refers to the rate index of the fire-storage combined system (including energy storage) responding to the AGC command; K2 refers to the time delay index of the fire-storage combined system (including energy storage) responding to the AGC control command; K3 refers to the accuracy index of the fire-storage combined system (including energy storage) responding to the AGC control command.

[0140] As shown in each scenario diagram, it is the maximum output difference of the combined fire-storage system (without energy storage) in time period t.

[0141] 5a) Scenario 1: Energy storage can immediately and fully meet the AGC directive requirements

[0142]

[0143]

[0144]

[0145] 5b) Scenario 2: Energy storage cannot immediately meet the AGC instructions, but the combined thermal power and energy storage system can meet the instructions under the regulation of thermal power

[0146]

[0147]

[0148]

[0149] in, As shown in the scenario diagram, this is the time required for the combined fire-storage system (including energy storage) to reach the AGC command target value.

[0150] 5c) Scenario 3: Energy storage cannot immediately meet the AGC instructions, and even if thermal power is added, the AGC instructions cannot be met.

[0151]

[0152]

[0153]

[0154] in, is the maximum difference of the AGC instruction in the time period t, It is the rated output of the combined fire-storage system.

[0155] 5d) Scenario 4: Energy storage can immediately meet the AGC command, but the thermal power output direction is opposite to the AGC regulation direction due to other reasons, resulting in the failure of the thermal power and energy storage combined system to adjust to the command value.

[0156]

[0157]

[0158]

[0159] Step 6: Calculate the comprehensive frequency regulation performance index of the combined thermal energy storage system (including energy storage) during this period And FM mileage as follows:

[0160]

[0161]

[0162] in, is the response curve of the combined thermal energy storage system (including energy storage) during period t, It is the response curve of the combined fire-storage system (including energy storage) in period t-1.

[0163] Step 7: Capacity verification: Verify whether the state of charge of the energy storage system in this period is within the safe range. If not, reset all performance indicators and mileage parameters of period t, correct the maximum charge and discharge power of the electrochemical energy storage as follows, and return to step (5). is the energy difference between the energy storage and the safe limit of the state of charge at the beginning of period t, is the length of time period t, It is the maximum charge and discharge power of electrochemical energy storage.

[0164]

[0165] Step 8: Have you completed the calculation for all time periods of the day? If not, t=t+1, Reset to the actual maximum charge and discharge power of the electrochemical energy storage and return to step (5).

[0166] Step 9: Calculate the frequency regulation mileage benefits of the combined thermal energy storage system (including energy storage) on that day , the benefits of the combined thermal energy storage system (without energy storage) Compared with The calculation is completed. The frequency regulation mileage income of the combined thermal energy storage system (including energy storage) on that day The calculation is as follows:

[0167]

[0168] Among them, C is the frequency regulation benefit value per unit mileage, and the input is the rate index of the fire-storage combined system (including energy storage) responding to the AGC command in each time period , Time delay index of the combined thermal and energy storage system (including energy storage) responding to AGC control instructions , Accuracy index of the fire-storage combined system (including energy storage) responding to AGC control instructions , the frequency regulation mileage of the combined thermal energy storage system (including energy storage) on that day , output the frequency regulation mileage income of the combined thermal energy storage system (including energy storage) on that day The incremental frequency regulation mileage revenue of the combined thermal energy storage system (including energy storage) on that day .

[0169] Example:

[0170] A 330MW thermal power unit, with 10MW electrochemical energy storage, with a charge and discharge time of 1h, is simulated to obtain:

[0171] (1) Electrochemical energy storage output power diagram Figure 4 As shown (part of the time is taken, positive values ​​are discharge, negative values ​​are charge), the power and energy limits of electrochemical energy storage are taken into account.

[0172] (2) The fire-storage joint system responds to the AGC command as shown in the figure Figure 5 As shown (part of the time is captured), it can be seen that compared with the independent fire-storage joint system, the fire-storage joint system greatly improves the command response efficiency.

[0173] Calculations show that when the thermal-storage combined system is paired with 10MW of energy storage, the comprehensive performance index of frequency regulation is improved from 0.379pu to 2.289pu, the effective frequency regulation mileage is increased from 901MW to 1775MW, and the daily frequency regulation mileage income is increased from 2,571 yuan to 30,599 yuan, greatly improving the daily frequency regulation income.

[0174] The present invention proposes a method for predicting the benefits of a combined thermal energy storage system participating in the frequency regulation market, which has the following characteristics: reading in the actual daily response data of independent thermal power to AGC instructions; inferring the average standard regulation rate of AGC power generation units in the area on that day based on the actual benefits of the independent thermal power; simulating the setting of electrochemical energy storage equipment with specified power and capacity to form a combined thermal energy storage system with thermal power, simulating various actual operating conditions to participate in the AGC frequency regulation response on that day; calculating the frequency regulation performance index and frequency regulation mileage of the combined thermal energy storage system participating in the AGC response on a single day, and calculating the daily frequency regulation mileage benefits.

[0175] The present invention includes various situations that may be encountered when the combined thermal energy storage system responds to AGC instructions, and performs optimization simulation. The algorithm flow is concise and the calculation accuracy is high, which provides a certain reference value for the construction of electrochemical energy storage in thermal power plants and the participation of the combined thermal energy storage system in the auxiliary service market.

[0176] The invention proposes a revenue forecasting system for a combined fire and storage system participating in the frequency modulation market. Figure 6 As shown, including:

[0177] A first parameter acquisition module, which is used to obtain the AGC instruction response record of the fire-storage combined system (without energy storage) participating in the auxiliary service and the income of the fire-storage combined system (without energy storage) on that day;

[0178] A second parameter acquisition module, the second parameter acquisition module is used to obtain the average standard regulation rate of the AGC power generation unit in the area on that day according to the auxiliary service AGC instruction response record;

[0179] A third parameter acquisition module, the third parameter acquisition module is used to select a scenario for the combined thermal energy storage system (including energy storage), and calculate the frequency regulation performance index according to the scenario and the average standard regulation rate;

[0180] A fourth parameter acquisition module, which is used to calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined fire-storage system (including energy storage) on that day according to the frequency regulation performance index;

[0181] The revenue prediction module is used to obtain the incremental frequency regulation mileage revenue of the combined fire and storage system (including energy storage) on the day based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the revenue of the combined fire and storage system (without energy storage), so as to realize the revenue prediction of the frequency regulation market.

[0182] A terminal device provided in one embodiment of the present invention comprises: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0183] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0184] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0185] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0186] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0187] If the module / unit integrated in the terminal device 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 present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0188] The revenue prediction method and system for the thermal-storage combined system participating in the frequency regulation market proposed in the present invention have the following advantages: The method proposed in the present invention more accurately completes the index statistics and revenue calculation of the thermal-storage combined system participating in the AGC power grid frequency regulation auxiliary service market. The present invention is based on the idea of ​​multi-state simulation, combined with the power and capacity constraints of electrochemical energy storage, so that in the process of simulating the response to the AGC instruction, while making full use of the charging and discharging power of the electrochemical energy storage, the state of charge of the electrochemical energy storage can always be within a reasonable range, achieving the goal of optimizing charging and discharging. The method is based on the actual response of thermal power on the day, and can effectively simulate the daily charging and discharging curve of the electrochemical energy storage, the response curve of the thermal-storage combined system, and accurately calculate the revenue of participating in the frequency regulation auxiliary service market. It provides ideas for the optimal configuration of energy storage capacity when thermal power is matched with energy storage. The revenue prediction of the thermal-storage combined system participating in the frequency regulation market proposed in the present invention is based on the idea of ​​multi-state simulation, combined with the power and capacity constraints of electrochemical energy storage, and can effectively simulate the daily charging and discharging curve of the electrochemical energy storage, the response curve of the thermal-storage combined system, and accurately calculate the revenue of participating in the frequency regulation auxiliary service market.

[0189] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for predicting the income of a combined thermal power and energy storage system participating in a frequency modulation market, characterized in that: The steps include: Obtain the AGC instruction response record of the thermal-storage combined system without energy storage participating in the auxiliary service and the income of the thermal-storage combined system without energy storage on that day; According to the auxiliary service AGC command response record, the average standard regulation rate of the AGC power generation unit on that day is obtained; Select scenarios for the combined thermal and energy storage system and calculate the frequency regulation performance index based on the scenarios and the average standard regulation rate; Calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined system including energy storage and thermal storage on that day based on the frequency regulation performance index; Based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the revenue of the combined system without energy storage and thermal storage, the incremental frequency regulation mileage revenue of the combined system with energy storage and thermal storage on that day is obtained to realize the revenue forecast of the frequency regulation market; The average standard regulation rate of the AGC power generation unit on that day is calculated as follows: Regulation rate of the combined system of thermal storage without energy storage at each time period of the day ;in, for The length of the session; Adjustment rate of the combined system without energy storage at different time periods of the day Weighted to get the comprehensive regulation rate of the day ; Average standard regulation rate of AGC power generation unit on the day The calculation is as follows: in, It is the rate indicator of the response of the combined system of thermal energy storage without energy storage to the AGC instruction on that day; The frequency modulation performance index is calculated based on the scenario and the average standard modulation rate as follows: Scenario 1: Energy storage immediately and fully meets the AGC directive requirements: Scenario 2: The energy storage cannot immediately meet the AGC instruction, but the combined thermal power and energy storage system meets the instruction under the regulation of thermal power: in, It is the time required for the combined thermal energy storage system including energy storage to reach the AGC command target value; Scenario 3: Energy storage cannot immediately meet AGC instructions: in, is the maximum difference of the AGC instruction in the time period t, It is the rated output of the combined fire and storage system; Scenario 4: Energy storage immediately meets the AGC instruction, the thermal power output direction is opposite to the AGC adjustment direction, and the thermal-storage combined system cannot be adjusted to the instruction value: in, is the rate indicator of the combined system with energy storage and thermal energy storage responding to the AGC command, It is the time delay index of the combined system with energy storage and thermal storage in response to the AGC control command. It is the accuracy index of the response of the AGC control command of the combined system containing energy storage and thermal energy storage.

2. The method for predicting the income of the combined fire and storage system participating in the frequency modulation market according to claim 1 is characterized in that: The AGC command response record of the day when there is no energy storage thermal storage combined system participating in the auxiliary service includes the following parameters: Output of the thermal storage combined system without energy storage at the beginning of period t ; Output of thermal-storage combined system without energy storage at the end of period t ; AGC command value during period t ; The rate index of the combined system of thermal energy storage and no energy storage responding to the AGC command on that day ; Time delay index for the combined system of thermal energy storage and no energy storage to respond to AGC control instructions on that day ; Accuracy index of the response of the AGC control command of the combined system of thermal energy storage without energy storage .

3. The method for predicting the income of the combined fire and storage system participating in the frequency modulation market according to claim 1 is characterized in that: The comprehensive frequency regulation performance indicators and frequency regulation mileage of the combined energy storage and thermal storage system on that day are as follows: Comprehensive frequency regulation performance indicators of the combined system of energy storage and thermal storage on the same day as follows: Frequency regulation mileage of the combined energy storage and thermal storage system on the day as follows: in, is the response curve of the thermal energy storage combined system with energy storage in period t, This is the response curve of the combined thermal storage system including energy storage in period t-1.

4. The method for predicting the income of the combined fire and storage system participating in the frequency modulation market according to claim 1 is characterized in that: The incremental frequency regulation mileage revenue of the combined energy storage and thermal storage system on that day is as follows: Increased frequency regulation mileage revenue of the combined thermal and energy storage system (including energy storage) on that day ;in, The benefits of the combined thermal storage system without energy storage are: It is the frequency regulation mileage income of the combined energy storage and thermal storage system on that day.

5. The method for predicting the income of the combined fire and storage system participating in the frequency modulation market according to claim 1 is characterized in that: Frequency regulation mileage income of the combined energy storage and thermal storage system on the same day The calculation is as follows: Where C is the frequency modulation benefit per unit mileage.

6. A revenue prediction system for a combined thermal power and storage system participating in a frequency modulation market, characterized in that: The method for predicting the income of the combined fire-storage system participating in the frequency regulation market according to any one of claims 1 to 5 comprises: A first parameter acquisition module, the first parameter acquisition module is used to obtain the AGC instruction response record of the non-energy storage thermal storage combined system participating in the auxiliary service and the income of the non-energy storage thermal storage combined system on that day; A second parameter acquisition module, the second parameter acquisition module is used to obtain the average standard regulation rate of the AGC power generation unit on the day according to the auxiliary service AGC instruction response record; A third parameter acquisition module, the third parameter acquisition module is used to select a scenario for the combined system containing energy storage and thermal storage, and calculate the frequency regulation performance index according to the scenario and the average standard regulation rate; A fourth parameter acquisition module, the fourth parameter acquisition module is used to calculate the comprehensive frequency regulation performance index and frequency regulation mileage of the combined energy storage and thermal storage system on that day according to the frequency regulation performance index; The revenue prediction module is used to obtain the incremental frequency regulation mileage revenue of the combined system with energy storage and thermal storage on the same day based on the comprehensive frequency regulation performance indicators, frequency regulation mileage and the revenue of the combined system without energy storage and thermal storage, so as to realize the revenue prediction of the frequency regulation market.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method for predicting the income of the fire-storage combined system participating in the frequency modulation market as described in any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, the steps of the method for predicting the income of the fire-storage combined system participating in the frequency modulation market as described in any one of claims 1 to 5 are implemented.

Images