Power plant frequency modulation performance index analysis method and system

Abstract

The invention provides a power plant frequency modulation performance index analysis method and system, and the method comprises the steps: calculating a comprehensive frequency modulation performance index in a frequency modulation process in real time according to an adjustment rate, response time and adjustment precision; predicting the fuel cost required by the standard frequency modulation capacity of the power generation unit, and performing unit wear and consumption estimation to obtain a frequency modulation consumption estimation result; comparing and analyzing a frequency modulation cost comparison analysis result under the plant-level AGC and unit set modes; counting auxiliary service compensation benefits in the frequency modulation process of the power plant, wherein the auxiliary service compensation benefits comprise frequency modulation mileage compensation cost and AGC capacity compensation cost; and comprehensively analyzing the frequency modulation performance of the power plant by combining the comprehensive frequency modulation performance index, the frequency modulation consumption estimation result, the frequency modulation cost comparative analysis result and the auxiliary service compensation income. According to the method, through scientific frequency modulation performance evaluation, accurate frequency modulation cost prediction and effective frequency modulation auxiliary service income statistics, comprehensive and scientific support is provided for frequency modulation operation of the thermal power generating unit, and remarkable economic and social benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system frequency regulation, and more specifically, to a method, system, electronic equipment and storage medium for analyzing frequency regulation performance indicators of a power plant. Background Art

[0002] As power systems continue to expand in size and complexity, frequency stability has become crucial for their safe operation. Frequency regulation, a crucial element in ensuring stable power system operation, directly impacts its safety and reliability. In recent years, the rapid development of renewable energy generation and its large-scale integration into the grid have increased the complexity of grid operation, placing higher demands on frequency regulation performance. Thermal power units, as a traditional frequency regulation resource, still play a crucial role in grid frequency regulation, but their frequency regulation capabilities need to be further enhanced to accommodate the growth of renewable energy.

[0003] Currently, there is a lack of a systematic, scientific, and accurate analytical method for evaluating the frequency regulation performance of thermal power units and analyzing the benefits of frequency regulation ancillary services. Traditional frequency regulation performance evaluations often focus on a single indicator, failing to fully reflect the unit's frequency regulation capabilities. Frequency regulation cost forecasts are inaccurate, making it difficult to effectively guide production operations. Furthermore, the cost comparison analysis between plant-level AGC (load optimization control) and unit-level frequency regulation modes is insufficiently comprehensive, failing to provide a strong basis for optimizing frequency regulation modes for power plants. Furthermore, statistics on compensation benefits from frequency regulation ancillary services are incomplete, failing to provide accurate revenue information for power plants. Therefore, a new frequency regulation performance indicator analysis scheme is urgently needed to meet the high frequency regulation requirements of modern power systems, enhance the frequency regulation capabilities of thermal power units, optimize frequency regulation operating modes, and improve the overall benefits of power plants. Summary of the Invention

[0004] In response to the technical problems existing in the prior art, the present invention provides a method, system, electronic equipment and storage medium for analyzing the frequency regulation performance indicators of a power plant, so as to improve the frequency regulation capability of thermal power units, optimize the frequency regulation operation mode and improve the comprehensive efficiency of the power plant.

[0005] According to a first aspect of the present invention, a method for analyzing power plant frequency regulation performance indicators is provided, comprising:

[0006] Based on the regulation rate, response time and regulation accuracy, the comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant during the frequency regulation process are calculated in real time;

[0007] Predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimate result;

[0008] Compare and analyze the frequency regulation costs under the plant-level AGC and unit-level modes to obtain comparative analysis results of frequency regulation costs under different modes;

[0009] Collect statistics on the ancillary service compensation income during the power plant frequency regulation process, which includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0010] The frequency regulation performance of the power plant is comprehensively analyzed by combining the comprehensive frequency regulation performance indicators, frequency regulation consumption estimation results, frequency regulation cost comparison analysis results and ancillary service compensation income.

[0011] On the basis of the above technical solution, the present invention can also make the following improvements.

[0012] Optionally, the comprehensive frequency regulation performance index of each frequency regulation unit in the power plant during the frequency regulation process is calculated in real time based on the regulation rate, response time, and regulation accuracy, including:

[0013] S101: Obtain the real-time frequency regulation indicators of each frequency regulation unit in the power plant during the frequency regulation process. According to the regulation rate k1, response time k2 and regulation accuracy k3 in each frequency regulation indicator, use formula (1) to calculate the comprehensive frequency regulation performance index k:

[0014] k=λ2×(λ1×k1+k2+k3) (1),

[0015] Among them, λ1 and λ2 are coefficients obtained by fitting based on historical operating data and are fixed constants; the regulation rate k1 refers to the rate at which the power generation unit responds to the AGC control command, the response time k2 refers to the time delay of the power generation unit in responding to the AGC control command, and the regulation accuracy k3 refers to the accuracy of the power generation unit in responding to the AGC control command;

[0016] S102, calculating the arithmetic mean of the comprehensive frequency regulation performance index k of the power generation unit in multiple time periods.

[0017] Optionally, the adjustment rate k1 is calculated by equation (2) and equation (3):

[0018]

[0019] Among them, Pe i,j is the output of unit i at the end of the response process of the jth adjustment;

[0020] Ps i,j is the output of unit i at the start of the jth regulation;

[0021] Te i,j It’s the moment of the end;

[0022] Ts I,j It’s the moment to begin;

[0023] V N,i is the standard regulation rate of unit i, given by the system;

[0024] V i,j is the adjustment rate of the jth adjustment of unit i. If the start and stop time of grinding is considered in AGC, then:

[0025]

[0026] Pd i,j is the critical power of the start-stop grinding of unit i during the j-th adjustment;

[0027] Td i,j It is the actual time consumed by unit i for the jth adjustment of starting and stopping the grinding mill.

[0028] Optionally, the response time k2 is calculated by formula (5):

[0029]

[0030] Among them, t i,j is the j-th AGC response time of unit i;

[0031] t N,i is the standard response time of unit i, given by the system;

[0032] a is an undetermined factor and a fixed constant.

[0033] Optionally, the adjustment accuracy k3 is calculated by equations (6) and (7):

[0034]

[0035] Where ΔP i,j is the deviation of the j-th adjustment of unit i;

[0036] P i,j (t) is the actual output of unit i at time t for the jth adjustment;

[0037] P i,j It is the set command value of unit i during the j-th adjustment period, which is given by the system dispatcher;

[0038] ΔP N,i The deviation allowed for the j-th adjustment of unit i is given by the system;

[0039] b is an undetermined factor and a fixed constant.

[0040] Optionally, the fuel cost required for the standard frequency regulation capacity of the power generation unit is predicted, and the wear and consumption of the unit is quantitatively estimated to obtain the frequency regulation consumption estimation result, including:

[0041] After a single frequency regulation process is completed, the actual frequency regulation fuel cost generated in the current single frequency regulation process is obtained;

[0042] Read historical operation data and filter out historical single fuel costs under the same coal quality and load conditions as the current single frequency modulation process;

[0043] Subtracting the actual frequency modulation fuel cost from the historical single fuel cost to obtain a single frequency modulation fuel cost difference;

[0044] Before the next frequency regulation begins, predicting the frequency regulation cost of the standard frequency regulation capacity based on the fuel cost difference of the single frequency regulation;

[0045] Combined with the real-time data of coal feed rate, mill current and fan current during the frequency modulation process, the wear and consumption of the unit are quantitatively estimated. Combined with the frequency modulation cost prediction results of the standard frequency modulation capacity, the frequency modulation consumption estimation results are obtained.

[0046] Optionally, the calculation process of predicting the fuel cost required for the standard frequency regulation capacity of the power generation unit includes:

[0047] The actual frequency regulation fuel cost generated during the current single frequency regulation process is calculated according to formula (8):

[0048]

[0049] Based on historical operating data, the fuel cost under the same coal quality and load conditions is obtained, and the calculation formula is:

[0050]

[0051] Among them, C i,j (P i,j (t)) is the real-time load in the regulation process i,j The fuel electricity cost at time (t) is It is the fuel cost of a single frequency regulation under the same fuel and load under historical operating conditions;

[0052] Calculate the fuel cost difference ΔC for a single frequency modulation according to equations (8) and (9): i,j for:

[0053]

[0054] Let the unit fuel cost per kWh during the jth regulation of unit i be the frequency regulation cost c under the standard frequency regulation capacity i,j ′, and make predictions according to formula (12) and formula (13):

[0055]

[0056] Where W is the total power generation during the regulation process.

[0057] Optionally, the comparative analysis of the frequency regulation costs in the plant-level AGC mode and the unit unit mode to obtain comparative analysis results of the frequency regulation costs in different modes includes:

[0058] Using historical operating data, establish a frequency regulation cost database for plant-level AGC mode and each unit mode corresponding to coal type and frequency regulation mileage;

[0059] Based on the frequency regulation cost database and in combination with the actual frequency regulation operation status, frequency regulation cost prediction results are provided in plant-level AGC mode and unit unit mode respectively;

[0060] The frequency regulation cost prediction results under the two modes are compared and analyzed to obtain the comparative analysis results of frequency regulation costs under different modes.

[0061] Optionally, the ancillary service compensation income during the power plant frequency regulation process is calculated, and the ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees, including:

[0062] Assuming that the compensation cost per unit frequency regulation mileage of power generation unit i1 is pi1, the compensation cost per unit AGC capacity of power generation unit j1 is pj1, the frequency regulation mileage of power generation unit i1 participating in the frequency regulation market is Qi1, and the AGC regulation capacity of power generation unit j1 providing AGC service is Qj1, the auxiliary service compensation income C during the power plant frequency regulation process is calculated according to formulas (14) to (16): 补偿费用 :

[0063] C 补偿费用 =∑Ci 调频里程补偿费用 +∑Cj AGC补偿费用 (14),

[0064] Ci 调频里程补偿费用 =∑Q i1 @p i1 (15),

[0065] Cj AGC补偿费用 =∑Q j1 @p j1 (16).

[0066] According to a second aspect of the present invention, a power plant frequency regulation performance index analysis system is provided, comprising:

[0067] The index analysis module is used to calculate the comprehensive frequency regulation performance index of each frequency regulation unit in the power plant in real time during the frequency regulation process based on the regulation rate, response time and regulation accuracy;

[0068] The frequency regulation cost prediction module is used to predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimation result;

[0069] The frequency regulation mode cost comparison and analysis module is used to compare and analyze the frequency regulation costs under the plant-level AGC and unit unit modes to obtain the frequency regulation cost comparison analysis results of different modes;

[0070] Ancillary service compensation income statistics module, used to count the ancillary service compensation income during the power plant frequency regulation process, the ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0071] The comprehensive analysis module is used to comprehensively analyze the frequency regulation performance of the power plant by combining the comprehensive frequency regulation performance indicators, the frequency regulation consumption estimation results, the frequency regulation cost prediction results and the auxiliary service compensation income.

[0072] According to a third aspect of the present invention, an electronic device is provided, comprising a memory and a processor, wherein the processor is configured to implement the steps of the power plant frequency regulation performance index analysis method when executing a computer management program stored in the memory.

[0073] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer management program is stored. When the computer management program is executed by a processor, the steps of the power plant frequency regulation performance index analysis method are implemented.

[0074] The present invention provides a power plant frequency regulation performance index analysis method, system, electronic equipment and storage medium. Through scientific frequency regulation performance evaluation, accurate frequency regulation cost prediction and effective frequency regulation auxiliary service revenue statistics, it provides comprehensive and scientific support for the frequency regulation operation of thermal power units, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 A flow chart of a method for analyzing power plant frequency regulation performance indicators provided by the present invention;

[0076] Figure 2 A schematic diagram of the composition of compensation costs provided for a certain embodiment;

[0077] Figure 3 A block diagram of a power plant frequency regulation performance index analysis system provided by the present invention;

[0078] Figure 4 A schematic diagram of the hardware structure of a possible electronic device provided by the present invention;

[0079] Figure 5 A schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0080] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0081] Figure 1 The present invention provides a flow chart of a method for analyzing the frequency regulation performance of a power plant, such as Figure 1 As shown, the method includes the following steps:

[0082] S1, based on the regulation rate, response time and regulation accuracy, calculates the comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant in real time during the frequency regulation process;

[0083] S2, predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimation result;

[0084] S3, compare and analyze the frequency regulation costs under the plant-level AGC and unit unit modes to obtain the comparative analysis results of the frequency regulation costs under different modes;

[0085] S4, calculating the ancillary service compensation income during the power plant frequency regulation process, wherein the ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0086] S5. Comprehensively analyze the frequency regulation performance of the power plant based on the comprehensive frequency regulation performance indicators, the frequency regulation consumption estimation results, the frequency regulation cost comparison analysis results, and the ancillary service compensation income.

[0087] Among them, steps S1 to S4 can be parallel steps, in no particular order; step S5 is after steps S1 to S4.

[0088] As can be understood, addressing the shortcomings of the background art, the present invention proposes a method for analyzing power plant frequency regulation performance indicators. This method provides comprehensive and scientific support for the frequency regulation of thermal power units through scientific frequency regulation performance evaluation, accurate frequency regulation cost forecasting, and effective frequency regulation ancillary service revenue statistics, resulting in significant economic and social benefits.

[0089] In a possible embodiment, step S1 includes:

[0090] S101: Obtain the real-time frequency regulation indicators of each frequency regulation unit in the power plant during the frequency regulation process. According to the regulation rate k1, response time k2 and regulation accuracy k3 in each frequency regulation indicator, use formula (1) to calculate the comprehensive frequency regulation performance index k:

[0091] k=λ2×(λ1×k1+k2+k3) (1),

[0092] Wherein, λ1 and λ2 are coefficients obtained by fitting based on historical operating data and are fixed constants. For example, in one embodiment, λ1=2 and λ2=0.25; the regulation rate k1 refers to the rate at which the power generation unit responds to the AGC control command, the response time k2 refers to the time delay of the power generation unit in responding to the AGC control command, and the regulation accuracy k3 refers to the accuracy with which the power generation unit responds to the AGC control command;

[0093] S102, calculating the arithmetic mean of the comprehensive frequency regulation performance index k of the power generation unit in multiple time periods.

[0094] It will be appreciated that this embodiment primarily performs statistical analysis of the comprehensive frequency regulation performance indicators of the power generation units. By reading real-time data such as the time nodes and load rate during the unit frequency regulation process and combining it with historical operating data, the comprehensive frequency regulation performance indicator is calculated. The magnitude of the three factors—regulation rate, response time, and regulation accuracy—is analyzed to determine the quality of the frequency regulation process. In the subsequent step S5, the comprehensive frequency regulation performance indicator k is used to measure the comprehensive performance of the power generation unit in response to AGC control commands. The arithmetic average of the comprehensive frequency regulation performance indicator k of the power generation unit over different time periods is the comprehensive frequency regulation performance indicator for the corresponding statistical period.

[0095] In one possible embodiment, the regulation rate k1 refers to the rate at which the power generation unit responds to the AGC control instruction. The regulation rate k1 is calculated by equations (2) and (3):

[0096]

[0097] Among them, Pe i,j is the output of unit i at the end of the response process of the jth regulation (in MW);

[0098] Ps i,j is the output of unit i at the start of the jth regulation (in MW);

[0099] Te i,N is the ending time (in minutes);

[0100] Ts i,j is the starting time (in minutes);

[0101] V N,i is the standard regulation rate of unit i (in MW / min), given by the system;

[0102] V i,j is the adjustment rate of the jth adjustment of unit i (in MW / minute). If the start-up and shutdown time of the grinding mill is considered in the AGC, then:

[0103]

[0104] Pd i,j is the critical power of the start-stop grinding of unit i for the jth adjustment (in MW);

[0105] Td i,j It is the actual time consumed by unit i for the jth adjustment of starting and stopping the grinding mill (in minutes).

[0106] In a possible embodiment, the response time k2 refers to the time delay of the power generation unit in responding to the AGC control instruction. The response time k2 is calculated by formula (5):

[0107]

[0108] Among them, t i,j is the jth AGC response time of unit i, response time t i,j The smaller it is, the larger the k2 value is, and the better the response time index is;

[0109] t N,i is the standard response time of unit i, given by the system;

[0110] a is a factor to be determined, a fixed constant, and preferably 2.

[0111] In one possible embodiment, the regulation accuracy k3 refers to the accuracy of the power generation unit in responding to the AGC control instruction. The regulation accuracy k3 is calculated by equations (6) and (7):

[0112]

[0113] Where ΔP i,j is the deviation of the j-th adjustment of unit i, ΔP i,j The smaller it is, the smaller the deviation is; the larger k3 is, the higher the adjustment accuracy is;

[0114] P i,j (t) is the actual output of unit i at the jth adjustment at time t (in MW);

[0115] P i,j It is the set command value of unit i during the j-th adjustment period, given by the dispatcher;

[0116] ΔP N,i The deviation allowed for the j-th adjustment of unit i is given by the system;

[0117] b is a factor to be determined, a fixed constant, and preferably 2.

[0118] It can be seen from the above embodiments that the larger k1, k2, and k3 are, and the larger the k value is, the better the comprehensive frequency modulation performance index is.

[0119] In a possible embodiment, step S2 includes:

[0120] After a single frequency regulation process is completed, the actual frequency regulation fuel cost generated in the current single frequency regulation process is obtained;

[0121] Read historical operation data and filter out historical single fuel costs under the same coal quality and load conditions as the current single frequency modulation process;

[0122] Subtracting the actual frequency modulation fuel cost from the historical single fuel cost to obtain a single frequency modulation fuel cost difference;

[0123] Before the next frequency regulation begins, predicting the frequency regulation cost of the standard frequency regulation capacity based on the fuel cost difference of the single frequency regulation;

[0124] Combined with the real-time data of coal feed rate, mill current and fan current during the frequency modulation process, the wear and consumption of the unit are quantitatively estimated. Combined with the frequency modulation cost prediction results of the standard frequency modulation capacity, the frequency modulation consumption estimation results are obtained.

[0125] It can be understood that this embodiment reads the historical operating data of the power plant, compares the real-time fuel cost under the same coal quality and load conditions with the real-time frequency regulation fuel cost generated during the actual frequency regulation process, obtains the actual frequency regulation fuel cost after the frequency regulation process is completed, and predicts the frequency regulation cost of the standard frequency regulation capacity before the next frequency regulation begins to guide production operation; and combines the real-time data such as the coal feed rate, mill current and fan current during the regulation process, and quantitatively estimates the wear and consumption of the unit during the standard frequency regulation capacity of the power generation unit to provide relevant suggestions or opinions for production operation.

[0126] It's understandable that when a unit responds to AGC control and participates in system frequency regulation, its operating conditions change. When the system frequency is low, the unit's participation in frequency regulation requires increasing the load, raising the system frequency, and maintaining normal system frequency. When the system frequency is high, the unit's load must be reduced, lowering the system frequency, ultimately adjusting the system frequency to normal within a short period of time. Regardless of the system frequency, the unit's participation in frequency regulation will cause load fluctuations within a short period of time. Because the load fluctuations during the unit frequency regulation process are large, unlike the typical slow increase and decrease in load, the unit's efficiency is somewhat reduced. Compared to operating conditions with the same coal quality and the same load, the fuel cost during the frequency regulation process inevitably increases, which is the frequency regulation cost. The frequency regulation cost for standard frequency regulation capacity is defined as the additional fuel cost incurred during the frequency regulation process relative to normal operation, per unit of frequency regulation capacity.

[0127] In a possible embodiment, the fuel cost required for predicting the standard frequency regulation capacity of the power generation unit is predicted by referring to the following strategy:

[0128] In a frequency modulation process, the actual frequency modulation fuel cost generated in the current single frequency modulation process is calculated according to formula (8):

[0129]

[0130] Based on historical operating data, the fuel cost under the same coal quality and load conditions is obtained, and the calculation formula is:

[0131]

[0132] Among them, C i,j (P i,j (t)) is the real-time load in the regulation process i,j The fuel electricity cost at time (t) is It is the fuel cost of a single frequency modulation under the same fuel and load under historical operating conditions, given by the fuel curve (or database) of historical fuel-load;

[0133] Calculate the fuel cost difference ΔC for a single frequency modulation according to equations (8) and (9): i,j for:

[0134]

[0135] Here ΔC i,j It can be understood as the increased fuel cost due to the frequency regulation process.

[0136] The average load during the regulation process is:

[0137] The total power generation during the regulation process is:

[0138] The unit fuel electricity cost during the jth regulation of unit i is the frequency regulation cost c under the standard frequency regulation capacity i,j ′, the expression is:

[0139]

[0140] In specific operations, historical data can be used to collect fuel costs for corresponding coal types and loads, creating a historical fuel-load fuel curve / database [ID, coal type, load, fuel cost]. Furthermore, data for coal type, load, and real-time frequency modulation fuel costs can be collected for each frequency modulation process, creating a corresponding database [ID-frequency modulation, coal type, load, frequency modulation fuel cost]. Before the next frequency modulation process, the frequency modulation cost can be predicted using this database data. The coal type, load, and real-time frequency modulation fuel cost database can be revised based on actual frequency modulation results. By continuously building and revising the database, the accuracy of the prediction results will continue to improve.

[0141] This step also provides a quantitative estimation of the wear and consumption of the unit during the standard frequency regulation capacity of the power generation unit. The system automatically collects relevant real-time operation data during the frequency regulation process, such as the coal feeding amount of the coal mill, the current of the coal mill, the currents of each fan, etc., and conducts real-time analysis on the wear of the unit. And by reading and analyzing relevant operation data through the SIS, including the consumption of coal feeding, the consumption of ammonia injection, the consumption of desulfurized gypsum, the consumption of feed water make-up, etc., a quantitative estimation of the consumption during the standard frequency regulation capacity of the power generation unit is obtained. In extreme cases, when the unit performs peak shaving and frequency regulation and the load drops to the stable combustion load, there may be a possibility of oil injection. At this time, the system will also consider the cost consumption of oil injection and include it in the frequency regulation consumption.

[0142] In a possible embodiment, step S3 includes:

[0143] Using historical operation data, establish a frequency regulation cost database for the plant-level AGC mode and each unit's unit mode corresponding to the coal type - frequency regulation mileage;

[0144] Based on the frequency regulation cost database, combined with the actual frequency regulation operation status, provide the frequency regulation cost prediction results for the plant-level AGC mode and the unit mode respectively;

[0145] Compare and analyze the frequency regulation cost prediction results in the two modes to obtain the frequency regulation cost comparison and analysis results of different modes.

[0146] For example, assume that the power plant has a total of n units. The frequency regulation cost (unit frequency regulation cost) of unit i (0 < i <= n) is pi2, the allocated frequency regulation load is Qi2, the total frequency regulation load (frequency regulation capacity) is Q2, and the total frequency regulation cost is P2. Then:

[0147] Q2 = ∑Qi2 (15),

[0148] P2 = ∑pi2·Qi2 (16),

[0149] In the single power generation unit mode (unit i), the frequency regulation cost P2 = pi2·Q2. If the total frequency regulation cost P has to reach the minimum, the unit with a lower unit frequency regulation cost should obtain more frequency regulation load in the plant-level AGC.

[0150] Understandably, due to the varying efficiencies of different generating units within a power plant, frequency regulation costs will inevitably vary during the frequency regulation process. Plant-level AGC and unit-level frequency regulation are two distinct modes, resulting in varying frequency regulation costs for the same frequency regulation mileage. Analyzing the frequency regulation costs of individual units helps power plants identify the optimal frequency regulation unit operating mode, improve frequency regulation efficiency, and reduce fuel costs. Leveraging historical operating data, a database of frequency regulation costs for plant-level AGC modes and each unit-level mode corresponding to coal type and frequency regulation mileage is established for comparative analysis. Combined with actual frequency regulation operating conditions, frequency regulation cost forecasts for both plant-level AGC and unit-level modes are provided, providing power plants with optimized frequency regulation models for their units.

[0151] As competition in the electricity market becomes increasingly fierce, highly homogenized electricity marketing plans have become similar. In order to attract more customers, electricity value-added services have become a way of differentiated marketing. Figure 2 As shown in the figure, according to the actual situation, the system provides the corresponding auxiliary service compensation costs during the power plant frequency regulation process, including the frequency regulation mileage compensation costs of the power generation units that won the bid in the corresponding frequency regulation market and the AGC capacity compensation costs of the power generation units that provide AGC services. In this way, the total compensation costs of the power plant are obtained and relevant records and statistics are made to provide the operating personnel with the power plant auxiliary service income situation.

[0152] Therefore, in a possible embodiment, step S4 includes:

[0153] Assume that generator unit i1 is the winning generator unit in the frequency regulation market, generator unit j1 provides AGC service, the compensation cost per unit frequency regulation mileage of generator unit i1 is pi1, the compensation cost per unit AGC capacity of generator unit j1 is pj1, the frequency regulation mileage of generator unit i1 participating in the frequency regulation market is Qi1, and the AGC regulation capacity of generator unit j1 providing AGC service is Qj1. According to formulas (17) to (19), the auxiliary service compensation income C during the power plant frequency regulation process is calculated: 补偿费用 :

[0154] C 补偿费用 =∑Ci 调频里程补偿费用 +∑Cj AGC补偿费用 (17),

[0155] Ci 调频里程补偿费用 =∑Q i1 ·p i1 (18),

[0156] Cj AGC补偿费用 =∑Q j1 ·p j1 (19).

[0157] Among them, the frequency regulation mileage compensation fee is only available to the power generation units that win the bid in the frequency regulation market, and the AGC compensation fee is available to all power generation units that provide AGC services.

[0158] Figure 3 A structural diagram of a power plant frequency regulation performance index analysis system provided by an embodiment of the present invention, such as Figure 3 As shown, a power plant frequency regulation performance index analysis system includes an index analysis module, a frequency regulation cost prediction module, a frequency regulation mode cost comparison analysis module, an auxiliary service compensation income statistics module and a comprehensive analysis module, wherein:

[0159] The index analysis module is used to calculate the comprehensive frequency regulation performance index of each frequency regulation unit in the power plant in real time during the frequency regulation process based on the regulation rate, response time and regulation accuracy;

[0160] The frequency regulation cost prediction module is used to predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimation result;

[0161] The frequency regulation mode cost comparison and analysis module is used to compare and analyze the frequency regulation costs under the plant-level AGC and unit unit modes to obtain the frequency regulation cost comparison analysis results of different modes;

[0162] Ancillary service compensation income statistics module, used to count the ancillary service compensation income during the power plant frequency regulation process, the ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0163] The comprehensive analysis module is used to comprehensively analyze the frequency regulation performance of the power plant by combining the comprehensive frequency regulation performance indicators, the frequency regulation consumption estimation results, the frequency regulation cost prediction results and the auxiliary service compensation income.

[0164] It can be understood that the power plant frequency regulation performance index analysis system provided by the present invention corresponds to the power plant frequency regulation performance index analysis method provided in the aforementioned embodiments. The relevant technical features of the power plant frequency regulation performance index analysis system can refer to the relevant technical features of the power plant frequency regulation performance index analysis method, and will not be repeated here.

[0165] See also Figure 4 , Figure 4 Schematic diagram of an embodiment of an electronic device provided by an embodiment of the present invention. Figure 4 As shown, an embodiment of the present invention provides an electronic device, including a memory 410, a processor 420, and a computer program 411 stored in the memory 420 and executable on the processor 420. When the processor 420 executes the computer program 411, the following steps are implemented:

[0166] Based on the regulation rate, response time and regulation accuracy, the comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant during the frequency regulation process are calculated in real time;

[0167] Predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimate result;

[0168] Compare and analyze the frequency regulation costs under the plant-level AGC and unit-level modes to obtain comparative analysis results of frequency regulation costs under different modes;

[0169] Collect statistics on the ancillary service compensation income during the power plant frequency regulation process, which includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0170] The frequency regulation performance of the power plant is comprehensively analyzed by combining the comprehensive frequency regulation performance indicators, frequency regulation consumption estimation results, frequency regulation cost comparison analysis results and ancillary service compensation income.

[0171] See also Figure 5 , Figure 5 Schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention. Figure 5 As shown, this embodiment provides a computer-readable storage medium 500, on which a computer program 511 is stored. When the computer program 511 is executed by a processor, the following steps are implemented:

[0172] Based on the regulation rate, response time and regulation accuracy, the comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant during the frequency regulation process are calculated in real time;

[0173] Predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimate result;

[0174] Compare and analyze the frequency regulation costs under the plant-level AGC and unit-level modes to obtain comparative analysis results of frequency regulation costs under different modes;

[0175] Collect statistics on the ancillary service compensation income during the power plant frequency regulation process, which includes frequency regulation mileage compensation fees and AGC capacity compensation fees;

[0176] The frequency regulation performance of the power plant is comprehensively analyzed by combining the comprehensive frequency regulation performance indicators, frequency regulation consumption estimation results, frequency regulation cost comparison analysis results and ancillary service compensation income.

[0177] The embodiments of the present invention provide a power plant frequency regulation performance index analysis method, system, electronic equipment, and storage medium. Through scientific frequency regulation performance evaluation, accurate frequency regulation cost prediction, and effective frequency regulation auxiliary service revenue statistics, they provide comprehensive and scientific support for the frequency regulation operation of thermal power units, and have significant economic and social benefits.

[0178] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0179] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0180] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0181] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0182] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1A step that specifies a function in one or more boxes.

[0183] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0184] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for analyzing power plant frequency regulation performance indicators, characterized in that: include: Based on the regulation rate, response time and regulation accuracy, the comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant are calculated in real time during the frequency regulation process; Predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimate result; Compare and analyze the frequency regulation costs under the plant-level AGC and unit-level modes to obtain comparative analysis results of frequency regulation costs under different modes; Collect statistics on the ancillary service compensation income during the power plant frequency regulation process, which includes frequency regulation mileage compensation fees and AGC capacity compensation fees; The frequency regulation performance of the power plant is comprehensively analyzed by combining the comprehensive frequency regulation performance indicators, frequency regulation consumption estimation results, frequency regulation cost comparison analysis results and ancillary service compensation income.

2. A power plant frequency regulation performance index analysis method according to claim 1, characterized in that: The comprehensive frequency regulation performance indicators of each frequency regulation unit in the power plant are calculated in real time according to the regulation rate, response time and regulation accuracy during the frequency regulation process, including: S101: Obtain the real-time frequency regulation indicators of each frequency regulation unit in the power plant during the frequency regulation process. According to the regulation rate k1, response time k2 and regulation accuracy k3 in each frequency regulation indicator, use formula (1) to calculate the comprehensive frequency regulation performance index k: k=λ2×(λ1×k1+k2+k3) (1), Among them, λ1 and λ2 are coefficients obtained by fitting based on historical operating data and are fixed constants; the regulation rate k1 refers to the rate at which the power generation unit responds to the AGC control command, the response time k2 refers to the time delay of the power generation unit in responding to the AGC control command, and the regulation accuracy k3 refers to the accuracy of the power generation unit in responding to the AGC control command; S102, calculating the arithmetic mean of the comprehensive frequency regulation performance index k of the power generation unit in multiple time periods.

3. The power plant frequency regulation performance index analysis method according to claim 2, characterized in that: The adjustment rate k1 is calculated by equations (2) and (3): Among them, Pe i,j is the output of unit i at the end of the response process of the jth adjustment; Ps i,j is the output of unit i at the start of the jth regulation; Te i,j It’s the moment of the end; Ts i,j It’s the moment to begin; V N,i is the standard regulation rate of unit i, given by the system; V i,j is the adjustment rate of the jth adjustment of unit i. If the start and stop time of grinding is considered in AGC, then: Pd i,j is the critical power of the start-stop grinding of unit i during the j-th adjustment; Td i,j It is the actual time consumed by unit i for the jth adjustment of starting and stopping the grinding mill.

4. A method for analyzing power plant frequency regulation performance indicators according to claim 3, characterized in that: The response time k2 is calculated by formula (5): Among them, t i,j is the j-th AGC response time of unit i; t N,i is the standard response time of unit i, given by the system; a is an undetermined factor and a fixed constant.

5. The power plant frequency regulation performance index analysis method according to claim 4, characterized in that: The adjustment accuracy k3 is calculated by equations (6) and (7): Where ΔP i,j is the deviation of the j-th adjustment of unit i; P i,j (t) is the actual output of unit i at time t for the jth adjustment; P i,j is the set command value for unit i during the jth adjustment period; ΔP N,i is the allowable deviation of the j-th adjustment of unit i; b is an undetermined factor and a fixed constant.

6. A method for analyzing power plant frequency regulation performance indicators according to claim 5, characterized in that: The fuel cost required for the standard frequency regulation capacity of the power generation unit is predicted, and the wear and consumption of the unit are quantitatively estimated to obtain the frequency regulation consumption estimation result, including: After a single frequency regulation process is completed, the actual frequency regulation fuel cost generated in the current single frequency regulation process is obtained; Read historical operation data and filter out historical single fuel costs under the same coal quality and load conditions as the current single frequency modulation process; Subtracting the actual frequency modulation fuel cost from the historical single fuel cost to obtain a single frequency modulation fuel cost difference; Before the next frequency regulation begins, predicting the frequency regulation cost of the standard frequency regulation capacity based on the fuel cost difference of the single frequency regulation; Combined with the real-time data of coal feed rate, mill current and fan current during the frequency modulation process, the wear and consumption of the unit are quantitatively estimated. Combined with the frequency modulation cost prediction results of the standard frequency modulation capacity, the frequency modulation consumption estimation results are obtained.

7. A method for analyzing power plant frequency regulation performance indicators according to claim 6, characterized in that: The calculation process of predicting the fuel cost required for the standard frequency regulation capacity of the power generation unit includes: The actual frequency regulation fuel cost generated during the current single frequency regulation process is calculated according to formula (8): Based on historical operating data, the fuel cost under the same coal quality and load conditions is obtained, and the calculation formula is: Among them, C i,j (P i,j (t)) is the real-time load in the regulation process i,j The fuel electricity cost at time (t) is It is the fuel cost of a single frequency regulation under the same fuel and load under historical operating conditions; Calculate the fuel cost difference ΔC for a single frequency modulation according to equations (8) and (9): i,j for: Let the unit fuel cost per kWh during the jth regulation of unit i be the frequency regulation cost c under the standard frequency regulation capacity i,j ′, and make predictions according to formula (12) and formula (13): Where W is the total power generation during the regulation process.

8. The power plant frequency regulation performance index analysis method according to claim 1, characterized in that: The comparative analysis of the frequency regulation costs under the plant-level AGC and unit-level modes to obtain the comparative analysis results of the frequency regulation costs under different modes includes: Using historical operating data, establish a frequency regulation cost database for plant-level AGC mode and each unit mode corresponding to coal type and frequency regulation mileage; Based on the frequency regulation cost database and in combination with the actual frequency regulation operation status, frequency regulation cost prediction results are provided in plant-level AGC mode and unit unit mode respectively; The frequency regulation cost prediction results under the two modes are compared and analyzed to obtain the comparative analysis results of frequency regulation costs under different modes.

9. The power plant frequency regulation performance index analysis method according to claim 1, characterized in that: The ancillary service compensation income during the power plant frequency regulation process is statistically analyzed. The ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees, including: Assuming that the compensation cost per unit frequency regulation mileage of power generation unit i1 is pi1, the compensation cost per unit AGC capacity of power generation unit j1 is pj1, the frequency regulation mileage of power generation unit i1 participating in the frequency regulation market is Qi1, and the AGC regulation capacity of power generation unit j1 providing AGC service is Qj1, the auxiliary service compensation income C during the power plant frequency regulation process is calculated according to formulas (14) to (16): 补偿费用 : C 补偿费用 =∑Ci 调频里程补偿费用 +∑Cj AGC补偿费用 (14), You 调频里程补偿费用 =∑Q i1 ·p i1 (15), Cj AGC补偿费用 =∑Q j1 ·p j1 (16)。 10. The power plant frequency regulation performance index analysis system according to claim 1, characterized in that: include: The index analysis module is used to calculate the comprehensive frequency regulation performance index of each frequency regulation unit in the power plant in real time during the frequency regulation process based on the regulation rate, response time and regulation accuracy; The frequency regulation cost prediction module is used to predict the fuel cost required for the standard frequency regulation capacity of the power generation unit, and quantify the wear and consumption of the unit to obtain the frequency regulation consumption estimation result; The frequency regulation mode cost comparison and analysis module is used to compare and analyze the frequency regulation costs under the plant-level AGC and unit unit modes to obtain the frequency regulation cost comparison analysis results of different modes; Ancillary service compensation income statistics module, used to count the ancillary service compensation income during the power plant frequency regulation process, the ancillary service compensation income includes frequency regulation mileage compensation fees and AGC capacity compensation fees; The comprehensive analysis module is used to comprehensively analyze the frequency regulation performance of the power plant by combining the comprehensive frequency regulation performance indicators, the frequency regulation consumption estimation results, the frequency regulation cost prediction results and the auxiliary service compensation income.

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