Method and system for peak regulation of output of thermoelectric unit

Abstract

The invention discloses a thermoelectric unit output peak shaving method and system. The method comprises the steps that an indoor temperature change equation considering thermal inertia is constructed; calculating to obtain a thermal output demand value of the thermoelectric unit corresponding to the selected temperature based on the indoor temperature change equation; according to the thermal output demand value and the thermoelectric output coupling characteristic curve of the thermoelectric unit, calculating the upper limit and the lower limit of the output of the thermoelectric unit in each scheduling time step; based on the power output upper limit, the power output lower limit and the load prediction curve of the target day, determining a to-be-peak-regulated period of the target day; the thermal power adjustable range of each thermoelectric unit is reversely calculated according to the indoor temperature change equation; and according to the thermal power adjustable range, the thermal output of each thermoelectric unit is adjusted so as to meet the electric output demand of the to-be-peak-regulated time period. According to the thermoelectric coupling characteristics of the thermoelectric unit, the thermal output of the thermoelectric unit is adjusted, and the adjustment range of the output is widened. The method is especially suitable for optimal scheduling of a power system in heating seasons.

Description

Technical Field

[0001] The present invention relates to the field of power system optimization and dispatching, and in particular to a method and system for peak load regulation of thermal power generation units. Background Art

[0002] With the large-scale grid connection of new energy power, the gap in peak load and frequency regulation of the power grid is becoming increasingly serious. The thermal power units of the heating system have become an important means of peak load regulation in the power system due to their strong flexibility, fast response speed, high efficiency and good reliability. Especially in the heating season, thermal power units not only need to meet the power demand, but also need to ensure the stable operation of the heating system. The heat load demand of the heating system has significant seasonality, daily changes and even hourly fluctuations, which puts higher requirements on the peak load regulation capacity of thermal power units.

[0003] Existing heating systems often have difficulty responding quickly to load changes, especially when load fluctuations are large. During the heating season, the operating mode of thermal power units is "heat determines electricity", which is a common operating mode of thermal power units. In this mode, the power production of the cogeneration unit is determined according to its heat load demand, that is, first meet the needs of heat users, and then use waste heat to generate electricity on this basis. On this basis, the adjustment range of electric and thermal output is strongly coupled, and the thermal output needs to be balanced with the thermal load demand on the user side, and the thermal output will affect the electrical output. In order to ensure that the heating system maintains the "heating priority" standard, the peak-shaving capacity of the power system of the existing thermal power units is lowered. Summary of the invention

[0004] The present invention aims to provide a method and system for peak-shaving the output of a thermal power unit to solve the technical problem of how to increase the regulation range of the power output of the thermal power unit, thereby meeting the peak-shaving demand of the power system.

[0005] In order to solve the above technical problems, the embodiments of the present invention provide a method and system for peak-shaving the output of a thermal power unit to solve the technical problem of how to increase the adjustment range of the power output of the thermal power unit, thereby meeting the peak-shaving demand of the power system.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for peak load regulation of thermal power generation units, which is applied to a heating system provided with a plurality of thermal power generation units, and comprises:

[0007] According to the operating parameters of the target heating system, an indoor temperature change equation considering thermal inertia is constructed, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature;

[0008] Based on the indoor temperature variation equation, the thermal output demand value of the thermal power unit corresponding to the selected temperature is calculated;

[0009] Calculate the upper and lower limits of the electrical output of the thermal power generation unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power generation unit obtained;

[0010] Based on the electric output upper limit, the electric output lower limit and the load forecast curve of the target day obtained, determining the peak load period to be regulated on the target day;

[0011] In the peak load period, the adjustable range of thermal power of each thermal power unit is reversely calculated according to the indoor temperature variation equation;

[0012] According to the adjustable range of thermal power, the thermal output of each of the thermal power units is adjusted to meet the electrical output demand during the peak-shaving period.

[0013] As one of the preferred solutions, adjusting the thermal output of each of the thermal power units according to the adjustable range of thermal power includes:

[0014] Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period;

[0015] Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks;

[0016] The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

[0017] As one of the preferred solutions, matching the adjustable thermal power range of each thermal power unit with the electric power demand of each power block based on the selected order of each scheduling time step includes:

[0018] According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit;

[0019] Obtain the required power value during the peak load period;

[0020] Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

[0021] As one of the preferred solutions, obtaining the increased power of each of the thermal power units according to the adjustable range of thermal power includes:

[0022] Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power;

[0023] On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power;

[0024] The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

[0025] As one of the preferred solutions, the indoor temperature variation equation is expressed as:

[0026]

[0027] Among them, T room is the indoor temperature of the heating user, T out is the outdoor temperature, Q rd is the heating power, H eq represents the equivalent thermal inertia of the heating system, R eq is the equivalent thermal resistance of the heating system, α is the heat loss coefficient of the heating network (0<α≤1), τ eq It is the equivalent delay of the heat medium flowing from the heat source to the user side in the heating network.

[0028] As one of the preferred solutions, after constructing the indoor temperature change equation, it also includes:

[0029] The temperature variation equation is discretized based on the dispatching time step of the power system.

[0030] As one of the preferred solutions, the calculation of the upper and lower limits of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained also includes:

[0031] Get the outdoor temperature on the target day;

[0032] Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature;

[0033] According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

[0034] As one of the preferred solutions, determining the peak-shaving period of the target day based on the power output upper limit, the power output lower limit and the load forecast curve of the target day obtained includes:

[0035] Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data;

[0036] Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model;

[0037] Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data;

[0038] Based on the load forecast curve, determine the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the target day load curve, so as to obtain the peak-shaving time period of the target day, and the peak-shaving time period includes the time period when the thermal power unit has insufficient peak capacity or insufficient valley capacity.

[0039] As one of the preferred solutions, based on the load forecast curve, determining the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the load curve of the target day to obtain the peak-shaving time period of the target day includes:

[0040] Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit;

[0041] According to the comparison result, the time period when the upper limit of the total power output of the thermal power unit is lower than the load prediction value or the time period when the lower limit of the total power output of the thermal power unit is higher than the load prediction value is determined as the time period to be peak-loaded.

[0042] Another embodiment of the present invention provides a thermal power unit output peak regulation system, which is applied to a heating system with a plurality of thermal power units, and includes:

[0043] A construction module, used to construct an indoor temperature change equation taking into account thermal inertia according to the operating parameters of the target heating system, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature;

[0044] A first calculation module, used for calculating the thermal output demand value of the thermal power unit corresponding to the selected temperature based on the indoor temperature change equation;

[0045] A second calculation module is used to calculate the upper limit and lower limit of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained;

[0046] A prediction module, configured to determine a peak-shaving period on the target day based on the power output upper limit, the power output lower limit and the acquired load prediction curve on the target day;

[0047] A reverse calculation module, used for reversely calculating the adjustable range of thermal power of each of the thermal power units according to the indoor temperature change equation during the peak load period;

[0048] The peak-shaving module is used to adjust the thermal output of each of the thermal power units according to the adjustable range of thermal power to meet the electrical output demand during the peak-shaving period.

[0049] As one of the preferred solutions, the peak shaving module is also used for:

[0050] Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period;

[0051] Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks;

[0052] The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

[0053] As one of the preferred solutions, the peak shaving module is also used for:

[0054] According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit;

[0055] Obtain the required power value during the peak load period;

[0056] Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

[0057] As one of the preferred solutions, the peak shaving module is also used for:

[0058] Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power;

[0059] On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power;

[0060] The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

[0061] As one preferred solution, the building block is further used for:

[0062] The temperature variation equation is discretized based on the dispatching time step of the power system.

[0063] As one preferred solution, the second calculation module is further used for:

[0064] Get the outdoor temperature on the target day;

[0065] Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature;

[0066] According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

[0067] As one preferred solution, the prediction module is further used for:

[0068] Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data;

[0069] Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model;

[0070] Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data;

[0071] Based on the load forecast curve, determine the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the target day load curve, so as to obtain the peak-shaving time period of the target day, and the peak-shaving time period includes the time period when the thermal power unit has insufficient peak capacity or insufficient valley capacity.

[0072] As one preferred solution, the prediction module is further used for:

[0073] Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit;

[0074] According to the comparison result, the time period when the upper limit of the total power output of the thermal power unit is lower than the load prediction value or the time period when the lower limit of the total power output of the thermal power unit is higher than the load prediction value is determined as the time period to be peak-loaded.

[0075] Another embodiment of the present invention provides a thermal power plant output peak-shaving device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the thermal power plant output peak-shaving method as described above when executing the computer program.

[0076] Yet another embodiment of the present invention provides a computer-readable storage medium storing a computer program, wherein when the device where the computer-readable storage medium is located executes the computer program, the output peak regulation method of the thermal power unit as described above is implemented.

[0077] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0078] 1) The method of the present invention realizes the automatic analysis and optimization control of the operation status of the heating system and the power grid through mathematical models and algorithms, reducing the time cost of manual intervention and decision-making, which helps to improve operation and maintenance efficiency, reduce operation and maintenance costs, and reduce the possibility of human errors;

[0079] 2) By considering thermal inertia, the present invention makes the indoor temperature change respond to external conditions (such as outdoor temperature and heating power changes) more smoothly, reducing the system's sensitivity to sudden changes, which helps to enhance the robustness of the heating system and enable it to better cope with various uncertainties and changes;

[0080] 3) Based on the heat output demand value calculated by the indoor temperature change equation and the heat-electric output coupling characteristic curve of the thermal power unit, the upper and lower limits of the power output of the thermal power unit in each scheduling time step can be accurately calculated. This refined management helps to optimize the operation strategy of the cogeneration system and reduce energy waste;

[0081] 4) By analyzing the load forecast curve of the target day, determine in which periods the thermal power units have insufficient peak capacity or insufficient valley capacity, that is, the peak-shaving periods. During these periods, by reversely calculating the adjustable thermal power range of the thermal power units and adjusting their thermal output accordingly, the peak-shaving pressure of the power grid can be effectively alleviated and the stability and reliability of the power grid can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 It is a schematic flow chart of a method for peak load regulation of a thermal power unit in one embodiment of the present invention;

[0083] Figure 2 A section of the power system with insufficient peak and valley voltage capabilities in one embodiment of the present invention;

[0084] Figure 3The electric-thermal coupling working characteristics of the thermoelectric unit in one embodiment of the present invention;

[0085] Figure 4 A schematic diagram of the division of power blocks in a part of the power system with insufficient peak load regulation capacity in one embodiment of the present invention;

[0086] Figure 5 The operating characteristics and operating points of four types of thermal power units in one embodiment of the present invention;

[0087] Figure 6 A schematic diagram of the division of the top peak load-shaving section Pk according to power level in one embodiment of the present invention;

[0088] Figure 7 Schematic diagram of power output of thermal power units participating in peak load regulation;

[0089] Figure 8 It is a structural schematic diagram of a thermal power unit output peak regulation system in one embodiment of the present invention;

[0090] Fig. 9 It is a schematic diagram of a thermal power unit output peak regulation device in one embodiment of the present invention. DETAILED DESCRIPTION

[0091] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. 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.

[0092] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0093] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do 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. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the description of the present invention, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0095] An embodiment of the present invention provides a method for peak load regulation of thermal power generation units. For details, see Figure 1 , Figure 1 The figure shows a flow chart of a method for peak load regulation of a thermal power unit provided in one embodiment of the present invention. The method comprises steps S1 to S6:

[0096] S1. According to the operating parameters of the target heating system, an indoor temperature change equation considering thermal inertia is constructed, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature;

[0097] According to the dynamic characteristics of the detailed model of the heating system of the thermal power plant, the state equation of the indoor temperature of the heating users considering the thermal inertia as the heating power and outdoor temperature change is fitted.

[0098] Preferably, in one embodiment of the present invention, the indoor temperature change equation is expressed as:

[0099]

[0100] Among them, T room is the indoor temperature of the heating user, T out is the outdoor temperature, Q rd is the heating power, H eqrepresents the equivalent thermal inertia of the heating system, R eq is the equivalent thermal resistance of the heating system, α is the heat loss coefficient of the heating network (0<α≤1), τ eq It is the equivalent delay of the heat medium flowing from the heat source to the user side in the heating network.

[0101] Specifically, according to the components and physical characteristics of the urban heating system, a detailed model of the entire heating system is built in professional thermal analysis software, including but not limited to the heat source part of the thermal power unit, thermal pipelines, heat exchangers, and user heat load models;

[0102] According to the historical operation data of the heating system, several typical operating conditions are selected, and the dynamic process of user temperature change corresponding to the jump of the heating power supply of the thermal power unit is obtained by simulation;

[0103] The simulation results are used to fit the parameters in the indoor temperature variation equation.

[0104] Furthermore, the continuous indoor temperature change equation is discretized based on the power system dispatching time step (usually 15 minutes) to obtain the discretized model of the heating system.

[0105] Preferably, in one embodiment of the present invention, after constructing the indoor temperature change equation, the method further includes:

[0106] The temperature variation equation is discretized based on the dispatching time step of the power system.

[0107] The temperature change equation after discretization is expressed as:

[0108]

[0109] In the formula, n and n-1 represent the discretized variables of the nth and n-1th dispatching steps. dd , then

[0110]

[0111] In the formula, k delay represents the equivalent delay of each scheduling step, k H It indicates the comprehensive resistance of the heating system to the change of its internal temperature with the scheduling step time when it receives thermal disturbance.

[0112] S2. Calculate the thermal output demand value of the thermal power unit corresponding to the selected temperature based on the indoor temperature change equation;

[0113] The calculation method is as follows:

[0114]

[0115] Among them, T ref It is the reference value of indoor temperature for heating users, such as 18℃.

[0116] S3, calculating the upper limit and lower limit of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained;

[0117] Preferably, in one embodiment of the present invention, the calculating the upper limit and lower limit of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained also includes:

[0118] Get the outdoor temperature on the target day;

[0119] Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature;

[0120] According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

[0121] S4. Determine the peak load period to be regulated on the target day based on the power output upper limit, the power output lower limit and the load forecast curve of the target day obtained;

[0122] Specifically, Figure 2 As shown, Figure 2 A schematic diagram of a section in which the peak and valley voltage capabilities of an electric power system provided by an embodiment of the present invention are insufficient is shown.

[0123] Preferably, in one embodiment of the present invention, determining the peak-shaving period of the target day based on the electric output upper limit, the electric output lower limit and the acquired load forecast curve of the target day includes:

[0124] Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data;

[0125] Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model;

[0126] Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data;

[0127] Based on the load forecast curve, the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the load curve of the target day is determined to obtain the peak-shaving time period of the target day.

[0128] Among them, the part where the upper limit of the power supply output is lower than the load power is the peak capacity shortage part, and the part where the lower limit of the output is higher than the load power is the valley capacity shortage part;

[0129] Preferably, in one embodiment of the present invention, judging, based on the load forecast curve, the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the load curve of the target day to obtain the peak-shaving time period of the target day, includes:

[0130] Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit;

[0131] According to the comparison results, the time period when the upper limit of the total electrical output of the thermal power unit is lower than the load forecast value or the time period when the lower limit of the total electrical output of the thermal power unit is higher than the load forecast value is determined as the time period to be peak-shaving, and the time period to be peak-shaving includes the time period when the top peak capacity or the valley capacity of the thermal power unit is insufficient.

[0132] S5, in the period to be peak-loaded, reversely calculating the adjustable range of thermal power of each of the thermal power units according to the indoor temperature variation equation;

[0133] During the period when the top peak or valley capacity is insufficient, based on the previous scheduling step of the thermal power unit, according to formula (2), the adjustable range of heating power of each thermal power unit within a number of scheduling steps within the allowable fluctuation range of the heating temperature is reversely calculated; the solution can be obtained by computer iteration, or the following formula can be used to approximately calculate the adjustable range of heating power for j scheduling steps.

[0134]

[0135] Where, ΔT lim It is the allowable range of room temperature fluctuation (for example, ±1°C), with positive values ​​for upward and negative values ​​for downward. Then, according to the thermal-electric output coupling working characteristics of the thermal power unit, the increase in the upper limit of the electric output and the decrease in the lower limit of the electric output caused by the change in thermal output are determined.

[0136] Specifically, Figure 3 As shown, Figure 3 The schematic diagram of the electric-thermal coupling working characteristics of the thermoelectric unit provided by the embodiment of the present invention is shown. According to the thermoelectric output coupling working characteristics of the thermoelectric unit, the upper limit increase value and the lower limit decrease value of the electric output of the corresponding thermoelectric unit due to the change of thermal output are determined; the increased power is recorded as P up i,j, the lowered power is recorded as P down i,j (i=,1,…,m, represents the thermal power unit number; j=1,2,…,n, represents the number of scheduling steps).

[0137] S6. According to the adjustable range of thermal power, the thermal output of each of the thermal power units is adjusted to meet the electrical output demand during the peak-shaving period.

[0138] Preferably, in one embodiment of the present invention, adjusting the thermal output of each of the thermal power units according to the adjustable range of thermal power includes:

[0139] Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period;

[0140] Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks;

[0141] The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

[0142] Preferably, in one embodiment of the present invention, matching the adjustable thermal power range of each thermal power unit with the electric power demand of each power block based on the selected order of each scheduling time step includes:

[0143] According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit;

[0144] Obtain the required power value during the peak load period;

[0145] Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

[0146] Preferably, in an embodiment of the present invention, obtaining the increased power of each of the thermal power units according to the adjustable range of thermal power includes:

[0147] Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power;

[0148] On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power;

[0149] The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

[0150] Specifically, for the power difference of insufficient peak / trough capacity, the power is divided into different blocks according to the power level, such as Figure 4 As shown, Figure 4 The schematic diagram of the power block division of the power system with insufficient peak load capacity provided by the embodiment of the present invention is shown. These power blocks also correspond to different power system dispatching steps; the top peak demand is met by the upward power regulation of the thermal power unit, and the low valley demand is met by the downward power regulation of the thermal power unit.

[0151] S601. For a power section of a power system that needs peak regulation, in the order of decreasing number of dispatching steps, according to the obtained power output regulation capability of thermal power units with the same number of dispatching steps, the power demand of each block is matched, and the most suitable unit or unit combination is selected to adjust the thermal output to complete the regulation of the power output. The units that have participated in power regulation will no longer participate in the regulation of other power blocks in the current peak regulation section. Specifically:

[0152] S602: For a block in the top peak demand, assume that its power value is P k,j , exhaustively enumerate the thermal power units with the same number of scheduling steps obtained in step S5 to increase the power P up 1,j , P up 2,j , ..., P up m,j , find the power greater than and closest to P k,j The power increase is set to the corresponding thermal power unit as the regulating unit of the top peak power regulation block, and the regulating value of the thermal output is recalculated according to the actual required electrical output regulation capability of the unit and the electrical and thermal output coupling characteristics of the unit;

[0153] S603, if there is no power greater than P k,j The increased power is then combined with the increased power with the same number of scheduling steps obtained in step S5, and the newly added adjustment power in the combination is greater than and closest to P k,j The combination of thermal power units is set as the regulating unit of the peak load block, and the thermal power units are put into use in order from large to small according to the adjustable power. The last unit recalculates the regulating value of thermal power according to the actual required electric output regulation demand;

[0154] All blocks in the top peak section are processed in steps S602 and S603 until all requirements are met;

[0155] Steps S601 to S603 are performed for all peak load-shaving sections in the target day until all peak load-shaving sections meet the load requirements of the power system. Similar operations are performed for all valley load sections until all sections that do not meet the peak load-shaving capacity in the target day are completed.

[0156] In order to better understand the technical solution of the present invention, further description is given in conjunction with the drawings and specific embodiments.

[0157] According to the established model, various parameters related to the thermal inertia of the thermal system in the embodiment are obtained, and the temperature change amount that meets the load temperature boundary is used as input, which is set to 1°C in this embodiment. The discretization model in step S2 and the thermal load prediction data are used to back-calculate the thermal power adjustable range ΔQ of each thermal power unit for several scheduling steps. b i,j , as shown in Table 1.

[0158] Table 1

[0159]

[0160] Assume that there are 4 types of thermal power units in the system, 2 units in each type, a total of 8 thermal power units, their working characteristics and working points are as follows: Figure 5 As shown, Figure 5 The working characteristics and working point schematic diagrams of the four types of thermal power units provided by the embodiments of the present invention are shown. According to the thermal power adjustment range of each thermal power unit and the operating characteristics of the thermal power unit in Table 2, the newly added adjustable power of the electric output after the thermal power of each thermal power unit is reduced for different time lengths is calculated. The increased power of the eight thermal power units is shown in Table 2, and the reduced power is shown in Table 3.

[0161] Table 2

[0162]

[0163] Table 3

[0164]

[0165] Select a peak load section P where the peak capacity of a thermal power unit does not meet the next day's daily load demand. k To illustrate, the power blocks divided by power level are as follows Figure 6 As shown, Figure 6 The peak insufficient section P provided by the embodiment of the present invention is shown. k Schematic diagram of power block division. Figure 6 The top peak shaving section P k , adjust and match the thermal power of each block in the order of decreasing scheduling step size, that is, according to P k,4 , P k,3 , Pk,2 , P k,1 The thermal power of each block is adjusted and matched in order.

[0166] First, the power block P k,4 Select appropriate thermal power units for thermal power adjustment and matching. The power block corresponds to an electric load peak demand of 8kW. Exhaustively select thermal power units with a scheduling step size of 4 to increase the power P. up 1,4 , P up 2,4 , ..., P up 8,4 , where the power of thermal power unit No. 5 or No. 6 is greater than and closest to P k,4 The newly increased power is set to P k,4 According to the actual required electric output of the unit, the thermal power adjustment value is calculated to be 28.6kW, that is, reducing the thermal output of the No. 5 thermal power unit by 28.6kW in the 36th to 40th scheduling steps can meet the power block P k,4 Peak load demand, such as Figure 7 From top to bottom is shown in Part 5. Specifically, Figure 7 A schematic diagram of power regulation output of a thermal power unit participating in peak regulation provided in an embodiment of the present invention is shown.

[0167] Similarly, we can k,3 Performing the same operation, reducing the thermal output of the No. 3 or No. 4 thermal power unit by 75kW in the 37th to 40th scheduling steps can meet the power block P k,3 The peak load demand corresponds to Figure 7 Part 4 from top to bottom.

[0168] Power Block P k,2 The corresponding peak load demand is 30kW. In Table 3, there is no block with a power greater than P. k,2 The newly increased power is then combined with the newly increased power with a scheduling step size of 2, and the newly increased power in the combination is selected to be greater than or equal to and closest to P k,2 The combination of thermal power units, namely the combination of thermal power unit No. 1 and thermal power unit No. 6 (the thermal power unit No. 5 has participated in the power block P k,4 The corresponding thermal power unit is set as the regulating unit of the peak power regulation block. First, the thermal power adjustable range of the No. 1 thermal power unit with the largest adjustable power is fully put into use. The thermal power adjustment value of the No. 6 thermal power unit is calculated to be 100kW according to the actual required electric output. That is, within the 37th to 40th scheduling steps, the thermal output of the No. 1 thermal power unit is first reduced by 70kW, and then the thermal output of the No. 6 thermal power unit is reduced by 100kW, which can meet the power block Pk,2 Peak load demand, such as Figure 7 Shown from top to bottom are parts 2 and 3.

[0169] Similarly, P k,1 With P k,4 The operation is the same for P k,1 , reducing the thermal output of the No. 7 or No. 8 thermal power unit by 50kW in the 38th to 39th scheduling step can meet the power block P k,1 The peak load demand corresponds to Figure 7 From top to bottom part 1.

[0170] At this time, the top peak load-shaving section P k The electric load demand is fully met, and the operations of other top peak load-shaving sections are similar. For the low valley load-shaving sections, the adjustable electric power can be adjusted down according to Table 3.

[0171] Another embodiment of the present invention provides a thermal power unit output peak regulation system, which is applied to a heating system with a plurality of thermal power units, see Figure 8 , Figure 8 The figure shows a flow chart of a method for peak-shaving output of a thermal power plant provided in one embodiment of the present invention. The thermal power plant peak-shaving output system comprises the following modules: a construction module 11, a first calculation module 12, a second calculation module 13, a prediction module 14, a reverse calculation module 15, a peak-shaving module 16,

[0172] A construction module 11 is used to construct an indoor temperature change equation taking into account thermal inertia according to the operating parameters of the target heating system, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature;

[0173] A first calculation module 12 is used to calculate the thermal output demand value of the thermal power unit corresponding to the selected temperature based on the indoor temperature change equation;

[0174] A second calculation module 13 is used to calculate the upper limit and lower limit of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained;

[0175] A prediction module 14, configured to determine a peak load period on the target day based on the power output upper limit, the power output lower limit and the acquired load prediction curve on the target day;

[0176] A reverse calculation module 15, used for reversely calculating the adjustable range of thermal power of each of the thermal power units according to the indoor temperature change equation during the peak load period;

[0177] The peak-shaving module 16 is used to adjust the thermal output of each of the thermal power units according to the adjustable range of thermal power to meet the electrical output demand during the peak-shaving period.

[0178] As one of the preferred solutions, the peak shaving module is also used for:

[0179] Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period;

[0180] Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks;

[0181] The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

[0182] As one of the preferred solutions, the peak shaving module is also used for:

[0183] According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit;

[0184] Obtain the required power value during the peak load period;

[0185] Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

[0186] As one of the preferred solutions, the peak shaving module is also used for:

[0187] Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power;

[0188] On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power;

[0189] The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

[0190] As one preferred solution, the building block is further used for:

[0191] The temperature variation equation is discretized based on the dispatching time step of the power system.

[0192] As one preferred solution, the second calculation module is further used for:

[0193] Get the outdoor temperature on the target day;

[0194] Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature;

[0195] According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

[0196] As one preferred solution, the prediction module is further used for:

[0197] Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data;

[0198] Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model;

[0199] Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data;

[0200] Based on the load forecast curve, determine the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the target day load curve, so as to obtain the peak-shaving time period of the target day, and the peak-shaving time period includes the time period when the thermal power unit has insufficient peak capacity or insufficient valley capacity.

[0201] As one preferred solution, the prediction module is further used for:

[0202] Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit;

[0203] According to the comparison result, the time period when the upper limit of the total power output of the thermal power unit is lower than the load prediction value or the time period when the lower limit of the total power output of the thermal power unit is higher than the load prediction value is determined as the time period to be peak-loaded.

[0204] Another embodiment of the present invention provides a thermal power plant output peak-shaving device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the thermal power plant output peak-shaving method as described above when executing the computer program.

[0205] Yet another embodiment of the present invention provides a computer-readable storage medium storing a computer program, wherein when the device where the computer-readable storage medium is located executes the computer program, the output peak regulation method of the thermal power unit as described above is implemented.

[0206] Another embodiment of the present invention provides a thermal power unit output peak load regulation device, see Fig. 9 , Fig. 9 A schematic diagram of a thermal power plant output peak-shaving device provided in one embodiment of the present invention is shown, comprising a processor 21, a memory 22, and a computer program stored in the memory 22 and configured to be executed by the processor 21. When the processor 21 executes the computer program, the steps in the thermal power plant output peak-shaving method embodiment described above are implemented, for example Figure 1 or, when the processor 21 executes the computer program, the functions of the modules in the above-mentioned device embodiments are implemented, such as constructing module 11.

[0207] Exemplarily, the computer program may be divided into one or more modules, which are stored in the memory 22 and executed by the processor 21 to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the ... device. For example, the computer program may be divided into a construction module 11, a first calculation module 12, a second calculation module 13, a prediction module 14, a reverse calculation module 15, and a peak adjustment module 16.

[0208] The processor 21 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 gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 21 is the control center of the thermal power unit output peak-shaving device, and uses various interfaces and lines to connect various parts of the thermal power unit output peak-shaving device.

[0209] The memory 22 can be used to store the computer program and / or module, and the processor 21 realizes various functions of the thermal power unit output peak-shaving device by running or executing the computer program and / or module stored in the memory 22, and calling the data stored in the memory 22. The memory 22 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 22 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0210] Wherein, if the module integrated with the output peak-shaving device of the thermal power unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an 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, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, 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, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic 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, etc.

[0211] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0212] Accordingly, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to perform the steps in the method for peaking the output of a thermal power unit in the above embodiment, for example Figure 1 Steps S1 to S6 described in .

[0213] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0214] 1) The method of the present invention realizes the automatic analysis and optimization control of the operation status of the heating system and the power grid through mathematical models and algorithms, reducing the time cost of manual intervention and decision-making, which helps to improve operation and maintenance efficiency, reduce operation and maintenance costs, and reduce the possibility of human errors;

[0215] 2) By considering thermal inertia, the present invention makes the indoor temperature change respond to external conditions (such as outdoor temperature and heating power changes) more smoothly, reducing the system's sensitivity to sudden changes, which helps to enhance the robustness of the heating system and enable it to better cope with various uncertainties and changes;

[0216] 3) Based on the heat output demand value calculated by the indoor temperature change equation and the heat-electric output coupling characteristic curve of the thermal power unit, the upper and lower limits of the power output of the thermal power unit in each scheduling time step can be accurately calculated. This refined management helps to optimize the operation strategy of the cogeneration system and reduce energy waste;

[0217] 4) By analyzing the load forecast curve of the target day, determine in which periods the thermal power units have insufficient peak capacity or insufficient valley capacity, that is, the peak-shaving periods. During these periods, by reversely calculating the adjustable thermal power range of the thermal power units and adjusting their thermal output accordingly, the peak-shaving pressure of the power grid can be effectively alleviated and the stability and reliability of the power grid can be improved.

[0218] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for peak load regulation of thermal power generation units, characterized in that: Applied to a heating system with several thermal power units, the thermal power unit output peak regulation method The following steps are involved: According to the operating parameters of the target heating system, an indoor temperature change equation considering thermal inertia is constructed, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature; Based on the indoor temperature variation equation, the thermal output demand value of the thermal power unit corresponding to the selected temperature is calculated; Calculate the upper and lower limits of the electrical output of the thermal power generation unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power generation unit obtained; Based on the electric output upper limit, the electric output lower limit and the load forecast curve of the target day obtained, determining the peak load period to be regulated on the target day; In the peak load period, the adjustable range of thermal power of each thermal power unit is reversely calculated according to the indoor temperature variation equation; According to the adjustable range of thermal power, the thermal output of each of the thermal power units is adjusted to meet the electrical output demand during the peak-shaving period.

2. The method for peak load regulation of thermal power unit output according to claim 1, characterized in that: The step of adjusting the thermal output of each of the thermal power units according to the adjustable range of thermal power includes: Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period; Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks; The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

3. The method for peak load regulation of thermal power unit output according to claim 2, characterized in that: The step of matching the adjustable thermal power range of each thermal power unit with the electric power demand of each power block based on the selected order of each scheduling time step comprises: According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit; Obtain the required power value during the peak load period; Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

4. The method for peak load regulation of thermal power unit output according to claim 3, characterized in that: The step of obtaining the increased power of each of the thermal power units according to the adjustable range of thermal power includes: Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power; On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power; The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

5. The method for peak load regulation of thermal power unit output according to claim 1, characterized in that: The indoor temperature change equation is expressed as: Among them, T room is the indoor temperature of the heating user, T out is the outdoor temperature, Q rd is the heating power, H eq represents the equivalent thermal inertia of the heating system, R eq is the equivalent thermal resistance of the heating system, α is the heat loss coefficient of the heating network, τ eq It is the equivalent delay of the heat medium flowing from the heat source to the user side in the heating network.

6. The method for peak load regulation of thermal power unit output according to claim 1, characterized in that: After constructing the indoor temperature change equation, also include: The temperature variation equation is discretized based on the dispatching time step of the power system.

7. The method for peak load regulation of thermal power unit output according to claim 6, characterized in that: The step of calculating the upper limit and lower limit of the electric output of the thermal power generation unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power generation unit obtained also includes: Get the outdoor temperature on the target day; Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature; According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

8. The method for peak load regulation of thermal power unit output according to claim 1, characterized in that: The determining the to-be-loaded peak-shaving period of the target day based on the electric output upper limit, the electric output lower limit and the acquired load forecast curve of the target day comprises: Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data; Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model; Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data; Based on the load forecast curve, determine the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the target day load curve, so as to obtain the peak-shaving time period of the target day, and the peak-shaving time period includes the time period when the thermal power unit has insufficient peak capacity or insufficient valley capacity.

9. The method for peak load regulation of thermal power unit output according to claim 8, characterized in that: The step of determining, based on the load forecast curve, the time period during which the upper / lower limit of the total electric output of the thermal power generation unit does not meet the load curve of the target day, so as to obtain the time period to be peak-loaded on the target day, includes: Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit; According to the comparison result, the time period when the upper limit of the total power output of the thermal power unit is lower than the load prediction value or the time period when the lower limit of the total power output of the thermal power unit is higher than the load prediction value is determined as the time period to be peak-loaded.

10. A thermal power unit output peak regulation system, characterized in that: Applied to a heating system with several thermal power units, the thermal power unit output peak regulation system includes the following modules: A construction module, used to construct an indoor temperature change equation taking into account thermal inertia according to the operating parameters of the target heating system, wherein the indoor temperature change equation reflects the influence of the heating power of the thermal power unit and the outdoor temperature on the indoor temperature; A first calculation module, used for calculating the thermal output demand value of the thermal power unit corresponding to the selected temperature based on the indoor temperature change equation; A second calculation module is used to calculate the upper limit and lower limit of the electric output of the thermal power unit in each scheduling time step according to the thermal output demand value and the thermal-electric output coupling characteristic curve of the thermal power unit obtained; A prediction module, configured to determine a peak-shaving period on the target day based on the power output upper limit, the power output lower limit and the acquired load prediction curve on the target day; A reverse calculation module, used for reversely calculating the adjustable range of thermal power of each of the thermal power units according to the indoor temperature change equation during the peak load period; The peak-shaving module is used to adjust the thermal output of each of the thermal power units according to the adjustable range of thermal power to meet the electrical output demand during the peak-shaving period.

11. The thermal power unit output peak regulation system according to claim 10, characterized in that: The peak shaving module is also used for: Dividing the power output demand of the peak-shaving period into power blocks corresponding to different scheduling time steps according to the power level of the peak-shaving period; Based on the selected order of each of the scheduling time steps, matching the adjustable thermal power range of each of the thermal power units with the electrical power demand of each of the power blocks; The matching results meeting the first preset condition are screened and selected to adjust the thermal output of each of the thermal power units.

12. The thermal power unit output peak regulation system according to claim 11, characterized in that: The peak shaving module is also used for: According to the adjustable range of thermal power, obtaining the increased power of each thermal power unit; Obtain the required power value during the peak load period; Each of the increased powers is matched with the required power value by an exhaustive method; if there is no increased power greater than the required power value, the increased powers with the same scheduling step are combined, and the combination of each increased power is matched with the required power value by the exhaustive method.

13. The thermal power unit output peak regulation system according to claim 12, characterized in that: The peak shaving module is also used for: Obtaining the maximum thermal power of the thermal power unit according to the adjustable range of thermal power; On the obtained thermal-electric output coupling characteristic curve, finding the electric power output corresponding to the maximum thermal power; The increased power of the thermal power unit is determined according to the maximum thermal power and the electrical power output.

14. The thermal power unit output peak regulation system according to claim 10, characterized in that: The building blocks are also used to: The temperature variation equation is discretized based on the dispatching time step of the power system.

15. The thermal power unit output peak regulation system according to claim 10, characterized in that: The second computing module is further used for: Get the outdoor temperature on the target day; Calculate the thermal output of the thermal power unit in each scheduling time step of the target day according to the discretized temperature change equation and the outdoor temperature; According to the thermal output and the thermal-electric output coupling characteristics of the thermal-electrical-powered-motor group, an upper limit and a lower limit of the electrical output of the thermal-electrical-powered-motor group at each scheduling time step are calculated.

16. The thermal power unit output peak regulation system according to claim 10, characterized in that: The prediction module is further used for: Collecting historical load data and preprocessing the historical load data, wherein the historical load data includes daily load data and meteorological data; Constructing a load forecasting model, inputting the preprocessed historical load data into the load forecasting model to obtain the trained load forecasting model; Obtaining meteorological data of the target day, inputting the data into the trained load forecasting model for forecasting, obtaining load data of the target day, and constructing the load forecasting curve according to the load data; Based on the load forecast curve, determine the time period when the upper / lower limit of the total electric output of the thermal power unit does not meet the target day load curve, so as to obtain the peak-shaving time period of the target day, and the peak-shaving time period includes the time period when the thermal power unit has insufficient peak capacity or insufficient valley capacity.

17. The thermal power unit output peak regulation system according to claim 16, characterized in that: The prediction module is further used for: Comparing the load prediction value of each point in the load prediction curve with the upper / lower limit of the total electric output of the thermal power unit; According to the comparison result, the time period when the upper limit of the total power output of the thermal power unit is lower than the load prediction value or the time period when the lower limit of the total power output of the thermal power unit is higher than the load prediction value is determined as the time period to be peak-loaded.

18. A thermal power unit output peak regulation device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for peaking the output of a thermal power unit as claimed in any one of claims 1 to 9 is implemented.

19. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for peaking the output of a thermal power plant as described in any one of claims 1 to 9 is implemented.

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