Heat supply conversion load automatic optimization calculation method based on load conversion coefficient method

Abstract

The invention relates to a heat supply conversion load automatic optimization calculation method based on a load conversion coefficient method, which comprises the following steps of: acquiring data according to a heat supply working condition diagram designed by a unit, and fitting a relation formula; according to the relation formula, the generated power difference value of the heat supply steam extraction amount under the specific main steam flow is calculated; based on the difference value, the heat supply steam extraction converted load is calculated according to a relational expression between the heat supply steam extraction converted load and the heat supply steam extraction amount under different steam extraction amounts; designing a heat supply conversion load automatic optimization loop, determining target loads according to requirements, and setting optimal comprehensive valve positions under different target loads; the actual valve position is adjusted through a PID controller, the heat supply converted load correction coefficient is obtained when the actual valve position is the same as the optimal comprehensive valve position, and the optimal heat supply converted load is obtained; the method solves the problems that the heat supply conversion load calculation of the heat supply unit under the heat supply working condition is inaccurate and the heat supply unit cannot adapt to the full-load working condition, further solves the problem of poor heat supply working condition coordination control, and improves the safe and stable operation of the heat supply unit.

Description

Technical Field

[0001] The invention relates to the technical field of automatic control of heating units in thermal power plants, and mainly to an automatic optimization calculation method for heating converted load based on a load conversion coefficient method. Background Art

[0002] In recent years, the installed capacity of new energy power generation such as wind power and solar power generation in my country has developed rapidly, resulting in an increasing peak-to-valley difference in the power grid load, and the power grid's peak-to-peak and frequency-regulating capabilities for thermal power units have become increasingly higher. In order to adapt to the needs of the power grid, thermal power units have to perform large-scale peak-to-peak operation for a long time. Large-capacity, high-parameter supercritical cogeneration units also need to undertake industrial steam supply and residential heating tasks during the heating season. In order to adapt to the current power market demand, cogeneration units are transformed for flexibility to improve the unit's regulation capabilities. Compared with pure condensing conditions, under heating conditions, the unit needs to provide a large amount of heating demand under low electrical load, resulting in the problem of thermal-electric decoupling imbalance of the unit. Thermal-electric decoupling imbalance causes water-coal imbalance in the heating unit during the heating season, large fluctuations in parameters such as main steam temperature, main steam pressure, and superheat, poor regulation dynamic characteristics, reduced unit variable load capacity, and the unit variable load and primary frequency regulation response cannot meet the needs of the power grid. These problems seriously affect the safety and economy of unit operation and need to be solved urgently.

[0003] For example, CN113093544B "A flexible coordinated control method for an external steam supply unit" discloses "a flexible coordinated control method for an external steam supply unit. First, the external steam supply flow is converted into a reduced load through dimension conversion, and the reduced pressure and reduced feed water flow are obtained through dynamic correction. The reduced pressure is then dynamically corrected by the comprehensive flow PID closed-loop controller, and then superimposed with the conventional main steam pressure setting loop as the final main steam pressure setting value; the reduced feed water flow is superimposed with the conventional feed water flow setting loop as the final feed water flow setting value; the reduced load is superimposed with the conventional boiler master control output as the final boiler master control output; after the external steam supply mode is put into operation, the source of the BTU fuel quantity setting value is switched from the actual power to the main steam flow, and the source of the oxygen quantity setting value is switched from the load instruction to the main steam flow". However, the method obtains the reduced load through dimension conversion, which can easily lead to inaccurate calculation of the heating reduced load and cannot adapt to full load conditions. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present application provides an automatic optimization calculation method for heating converted load based on the load conversion coefficient method.

[0005] The technical solution of this application is as follows:

[0006] A method for automatically optimizing the calculation of heating load conversion based on a load conversion coefficient method, the method comprising:

[0007] According to the unit design heating condition diagram, relevant data under different heating extraction steam flow rates are obtained, including power generation power and main steam flow rate, and a corresponding relationship curve formula is fitted according to the relevant data;

[0008] According to the relationship curve formula, the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate is calculated; based on the difference in power generation, the heating extraction steam converted load is calculated according to the corresponding relationship between the heating extraction steam converted load and the heating extraction steam volume under different extraction steam volumes;

[0009] An automatic optimization loop for heat conversion load is designed, which determines the target load according to the actual heating demand and the operating status of the unit, and sets the optimal comprehensive valve position under different target loads; a PID controller is used to dynamically adjust the actual valve position to obtain a heat conversion load correction coefficient when the actual valve position is the same as the optimal comprehensive valve position, and the heat conversion load is adjusted according to the heat conversion load correction coefficient to obtain the optimal heat conversion load.

[0010] Preferably, the corresponding relationship between the power generation power and the main steam flow rate under different heating extraction steam flow rates is expressed by the formula:

[0011] Main steam flow = F (power generation power, heating steam extraction volume).

[0012] Preferably, based on the difference in power generation, the steam extraction flow rate converted load is calculated according to the corresponding relationship between the heating steam extraction load and the heating steam extraction amount at different extraction amounts, specifically:

[0013] The average value of the difference in power generation is used as the basis for calculating the heat extraction steam converted load. The extraction steam flow rate converted load per preset unit under different heat extraction steam volumes is calculated. The calculation results are analyzed to obtain the corresponding relationship between the heat extraction steam converted load and the heat extraction steam volume under different extraction steam volumes. The corresponding curve function of the heat extraction steam flow rate and the heat extraction load is fitted by linear regression, where:

[0014] The corresponding relationship between the heating extraction steam flow rate and the extraction steam flow rate converted load under different extraction steam volumes is expressed as follows:

[0015] P G =K i ×G;

[0016] Where P G Indicates the converted load of heating extraction steam; K i It indicates the conversion correction coefficient of heating extraction steam under different extraction steam capacities; G indicates the heating extraction steam capacity.

[0017] Preferably, when the actual heating demand changes, the heating converted load automatic optimization circuit adjusts the target load according to the current actual heating demand and unit status; when the heating converted load changes, the heating converted load correction coefficient remains unchanged.

[0018] Preferably, the PID controller includes proportional control, integral control and differential control, wherein:

[0019] The proportional control adjusts the correction coefficient according to the error between the actual value and the target value of the heating converted load, which can be expressed as:

[0020] P out =K p ×e(t);

[0021] Where P out Represents the output of proportional control; K p represents the proportionality coefficient; e(t) represents the error between the actual value and the target value of the heating load;

[0022] The integral control is to adjust the correction coefficient based on the accumulated historical errors, eliminate the long-term errors, and is expressed as follows:

[0023]

[0024] In the formula, I out Represents the output of integral control; K i represents the integral coefficient; Indicates the cumulative value of the error;

[0025] The differential control adjusts the correction coefficient by predicting the changing trend of the error, which can be expressed as:

[0026]

[0027] Where D out Represents the output of differential control; K d represents the differential coefficient; Indicates the rate of change of error. Preferably, the total output PID of the PID controller is out , expressed as:

[0028] PID out =P out +I out +D out .

[0029] The automatic optimization calculation system for heating load conversion based on the load conversion coefficient method includes a data acquisition module, a fitting module, a difference calculation module, a load calculation module, a target load determination module, a control module and an adjustment module, wherein:

[0030] The data acquisition module is used to acquire relevant data under different heating extraction steam flow rates according to the unit design heating condition diagram, including power generation power and main steam flow rate;

[0031] The fitting module is used to fit the corresponding relationship curve formula according to the relevant data;

[0032] The difference calculation module is used to calculate the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate according to the fitted corresponding relationship curve formula;

[0033] The load calculation module is used to calculate the heat extraction steam flow rate converted load based on the difference in power generation;

[0034] The target load determination module is used to determine the target load according to the actual heating demand and set the optimal comprehensive valve position under different target loads;

[0035] The control module has a built-in PID controller, which uses the PID controller to dynamically adjust the actual valve position to obtain the heating load correction coefficient when the actual valve position is the same as the optimal final valve position;

[0036] The adjustment module is used to adjust the heating converted load according to the heating converted load correction coefficient to obtain the optimal heating converted load.

[0037] Preferably, the difference calculation module is specifically:

[0038] The average value of the difference in power generation is used as the basis for calculating the heat extraction steam converted load. The extraction steam flow rate converted load per preset unit under different heat extraction steam volumes is calculated. The calculation results are analyzed to obtain the corresponding relationship between the heat extraction steam converted load and the heat extraction steam volume under different extraction steam volumes. The corresponding curve function of the heat extraction steam flow rate and the heat extraction load is fitted by linear regression, where:

[0039] The corresponding relationship between the heating extraction steam flow rate and the extraction steam flow rate converted load under different extraction steam volumes is expressed as follows:

[0040] P G =K i ×G;

[0041] Where P G Indicates the converted load of heating extraction steam; K i It indicates the conversion correction coefficient of heating extraction steam under different extraction steam capacities; G indicates the heating extraction steam capacity.

[0042] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for automatically optimizing the calculation of the heating converted load based on the load conversion coefficient method as described in any one of the embodiments is implemented.

[0043] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the automatic optimization calculation method for heating converted load based on the load conversion coefficient method as described in any one of the embodiments.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1) The present invention provides an automatic optimization calculation method for heat conversion load based on the load conversion coefficient method. A correction coefficient is introduced into the heat conversion load calculation method by the load conversion coefficient method. Through the precise adjustment of the coefficient, the estimation error in the traditional load calculation method is reduced, and the calculation accuracy of the heat conversion load under different working conditions is improved;

[0046] 2) The present invention provides an automatic optimization calculation method for heating converted load based on the load conversion coefficient method, and is designed with an automatic optimization loop, which is more compatible with the actual operating conditions of the unit, reduces dependence on manual intervention, reduces maintenance costs and human resource investment, and improves calculation efficiency and system stability.

[0047] 3) The present invention provides an automatic optimization calculation method for heating converted load based on the load conversion coefficient method, introduces a main steam flow correction coefficient and uses a PID controller to adjust the correction coefficient, thereby realizing real-time optimization of the main steam flow, improving the adaptability of the control strategy, and enhancing the stability and adaptability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a method flow chart of an embodiment of the present invention;

[0049] Figure 2 This is a design heating condition diagram of an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the automatic optimization principle of the heating converted load according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0052] The present invention provides the following technical solution: an automatic optimization calculation method for heating converted load based on a load conversion coefficient method.

[0053] Example 1

[0054] This embodiment provides a method for automatically optimizing the calculation of heating load conversion based on the load conversion coefficient method, and the specific steps include:

[0055] S1. Obtain relevant data under different heating extraction steam flow rates according to the unit design heating condition diagram, including power generation power and main steam flow rate, and fit the corresponding relationship curve formula according to the relevant data;

[0056] S11. Design heating condition diagram

[0057] See also Figure 2 The design heating condition diagram is a line diagram reflecting the relationship between the power of the cogeneration steam turbine, the main steam flow rate and the regulating extraction steam flow rate. The main steam flow rate is the vertical coordinate and the minimum heating flow rate is the horizontal coordinate. "G" represents the heating load, the unit is thermal power (such as kilowatts or megawatts), representing the amount of heat that the system needs to provide, and "t / h" represents the heat load in hours. The relationship between the two describes the total amount of heat that the system needs to provide within a period of time, which is expressed as follows:

[0058]

[0059] Where, t represents unit time, Q(t) represents the instantaneous heat load at time t, where 1G = 0 t / h, 2G = 130 t / h, 3G = 265 t / h, 4G = 400 t / h, 5G = 510 t / h;

[0060] The relevant data under different heating extraction steam flow rates are obtained according to the designed heating condition diagram, as shown in Table 1:

[0061] Table 1 Corresponding relationship between main steam flow and power generation under heating steam extraction

[0062]

[0063] S12, fitting curve formula

[0064] The obtained data is cleaned, and the data cleaning includes processing missing values, abnormal values ​​and unifying the data format; according to the corresponding relationship between the main steam flow and the power generation power in Table 1, the relationship curve formula between the main steam flow and the power generation power under the heating steam extraction amount is fitted, and the formula is expressed as follows:

[0065]

[0066] In the formula, D represents the main steam flow; Gi Indicates the amount of steam extracted for heating; P E Indicates the power generated.

[0067] S2. Calculate the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate according to the relationship curve formula; calculate the heating extraction steam converted load according to the corresponding relationship between the heating extraction steam converted load and the heating extraction steam volume under different extraction steam volumes based on the difference in power generation;

[0068] S21. Load conversion factor method

[0069] The basic principle of the load conversion coefficient method for calculating the heating conversion load is that when the unit heating extraction steam flow is constant, the power generation power and the main steam flow are in a linear relationship; when the power generation power is constant, there is a specific functional relationship between the main steam flow and the heating extraction steam volume; according to the functional relationship between the power generation power, the main steam flow and the heating extraction steam volume, the main steam flow = F (power generation power, heating extraction steam volume);

[0070] According to formula (2), when the heating extraction steam volume remains unchanged, there is a linear relationship between the main steam flow rate and the power generation power. According to the functional relationship of main steam flow rate = F (power generation power, heating extraction steam volume), the difference in power generation power corresponding to the heating extraction steam volume under a specific main steam flow rate is calculated. The calculation results are shown in Table 2.

[0071] S22, analyzing the difference change of the power generation, calculating the load converted from the steam extraction flow rate of each 10 t / h under different heating steam extraction rates, establishing a relationship between the heating steam extraction flow rate and the steam extraction flow rate converted from the load, and fitting a corresponding curve function;

[0072] Table 2 Difference in power output at different heating steam extraction intervals

[0073]

[0074] S221. Analyze the changes in power generation difference

[0075] Please refer to Table 2. When the heating extraction steam volume is less than 400t / h, the increase in power generation decreases at each main steam flow interval under different extraction steam volume intervals. When the heating extraction steam volume is greater than 400t / h, the increase in power generation increases with the increase in main steam flow, and the increase is relatively large. However, this operating condition is an extreme operating condition. Therefore, the average value of the increase in power generation is considered as the basis for calculating the heating extraction steam converted load.

[0076] The average value of the power generation increase is used as the basis for calculating the heat extraction steam conversion load, and the conversion load of each 10t / h steam extraction flow rate under different heat extraction steam volumes is calculated. The calculation results are summarized, and it is concluded that there is a corresponding relationship between the heat extraction steam conversion load and the heat extraction steam volume under different extraction steam volumes, which is expressed as follows:

[0077] P G =K i ×G; (3)

[0078] Where P G Indicates the converted load of heating extraction steam; K i represents the heating extraction steam conversion correction coefficient under different extraction steam volumes; G represents the heating extraction volume; and the fitting curve function f1(x) corresponding to the heating extraction steam flow rate and the heating conversion load.

[0079] S3. Design an automatic optimization loop for heat conversion load, which determines the target load according to the actual heat demand and the operating status of the unit, and sets the optimal comprehensive valve position under different target loads; uses a PID controller to dynamically adjust the actual valve position, obtains a heat conversion load correction coefficient when the actual valve position is the same as the optimal comprehensive valve position, and adjusts the heat conversion load according to the heat conversion load correction coefficient to obtain the optimal heat conversion load.

[0080] S31, correction factor

[0081] Correction coefficients are usually used to adjust or correct the calculation or prediction results of a certain quantity to take into account possible errors or unconsidered factors in actual operation. In heating systems or power generation systems, correction coefficients can be used to correct the difference between theoretical calculations and actual operations to improve the accuracy of calculations or adapt to changes in actual conditions.

[0082] When the heating conversion is put into use, the correction coefficient of the main steam flow rate to the heating conversion load is introduced, and the heating extraction steam conversion load curve function f1(x) is calculated using the conversion load coefficient method. The heating conversion load is corrected under different working conditions, and the heating conversion load is calculated to eliminate the calculation error under different working conditions. The main steam flow correction coefficient corresponds to the curve function f2(x);

[0083] According to the unit operation data and the heating steam extraction load calculated according to formula (3), the calculation error is within 2%, which meets the engineering calculation requirements. Therefore, the heating steam extraction load can be calculated using the reduced load coefficient method.

[0084] S32, automatic optimization circuit

[0085] See also Figure 3, design an automatic optimization loop, where 1 represents the difference algorithm block, 2 represents the AND algorithm block, 3 represents the PID algorithm block, 4 represents the switch quantity switching algorithm block, 5 represents the switch quantity algorithm block, 6 represents the rate limit algorithm block, 7 represents the multiplication algorithm block, f1(x) represents the heating extraction steam load conversion curve function, f2(x) represents the main steam flow correction coefficient corresponding curve function, f3(x) represents the optimal turbine comprehensive instruction corresponding curve function under different loads, and f4(x) represents the turbine comprehensive instruction deviation control curve function;

[0086] Since the general steam turbine comprehensive instruction is maintained at 87%, it can not only ensure that the steam turbine throttling loss is small, but also ensure the unit's variable load and primary frequency regulation capabilities, so the automatic optimization strategy of heat conversion load is introduced; according to the specific situation, different optimal steam turbine comprehensive instruction curve functions f3(x) are set under different loads, and the PID controller (Proportional-Integral-Derivative, PID) is used to control and calculate the heat conversion load correction coefficient that meets the optimal comprehensive valve position to ensure that the steam turbine comprehensive instruction is 87%, among which the steam turbine comprehensive instruction deviation control curve function is f4(x), and the optimal heat conversion load is obtained, so that the actual steam turbine comprehensive instruction reaches the ideal value;

[0087] This loop takes effect when the heat supply conversion and coordinated control are put into operation; when the load changes, the correction coefficient remains unchanged to prevent the loop from interfering with the load change; combined with the heat supply steam extraction conversion load, the optimal heat supply conversion load is obtained;

[0088] S33, PID controller includes proportional control, integral control and differential control;

[0089] The proportional control adjusts the correction coefficient according to the error between the actual value and the target value of the heating converted load, which can be expressed as:

[0090] P out =K p ×e(t);

[0091] Where P out Represents the output of proportional control; K p represents the proportionality coefficient; e(t) represents the error between the actual value and the target value of the heating load;

[0092] The integral control is to adjust the correction coefficient based on the accumulated historical errors, eliminate the long-term errors, and is expressed as follows:

[0093]

[0094] In the formula, I out Represents the output of integral control; K irepresents the integral coefficient; Indicates the cumulative value of the error;

[0095] The differential control adjusts the correction coefficient by predicting the changing trend of the error, which can be expressed as:

[0096]

[0097] Where D out Represents the output of differential control; K d represents the differential coefficient; Indicates the rate of change of error;

[0098] The total output of the PID controller is PID out , expressed as:

[0099] PID out =P out +I out +D out .

[0100] Example 2

[0101] This embodiment provides a heating load automatic optimization calculation system based on the load conversion coefficient method, the system includes a data acquisition module, a fitting module, a difference calculation module, a load calculation module, a target load determination module, a control module and an adjustment module, wherein:

[0102] The data acquisition module is used to acquire relevant data under different heating extraction steam flow rates according to the unit design heating condition diagram, including power generation power and main steam flow rate;

[0103] The fitting module is used to fit the corresponding relationship curve formula according to the relevant data;

[0104] The difference calculation module is used to calculate the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate according to the fitted corresponding relationship curve formula;

[0105] The load calculation module is used to calculate the heat extraction steam flow rate converted load based on the difference in power generation;

[0106] The target load determination module is used to determine the target load according to the actual heating demand and set the optimal comprehensive valve position under different target loads;

[0107] The control module has a built-in PID controller, which uses the PID controller to dynamically adjust the actual valve position to obtain the heating load correction coefficient when the actual valve position is the same as the optimal final valve position;

[0108] The adjustment module is used to adjust the heating converted load according to the heating converted load correction coefficient to obtain the optimal heating converted load.

[0109] Example 3

[0110] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for automatically optimizing the calculation of the heating converted load based on the load conversion coefficient method as described in any one of Embodiment 1 is implemented.

[0111] Example 4

[0112] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for automatically optimizing the calculation of the heating converted load based on the load conversion coefficient method as described in any one of Embodiments 1 is implemented.

[0113] It is worth noting that the system, electronic device and computer-readable storage medium described in the present invention are based on the same principles as the method described in Example 1, and will not be described in detail here.

[0114] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. The automatic optimization calculation method for heating load conversion based on the load conversion coefficient method is characterized by: The method comprises: According to the unit design heating condition diagram, relevant data under different heating extraction steam flow rates are obtained, including power generation power and main steam flow rate, and a corresponding relationship curve formula is fitted according to the relevant data; According to the relationship curve formula, the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate is calculated; based on the difference in power generation, the heating extraction steam converted load is calculated according to the corresponding relationship between the heating extraction steam converted load and the heating extraction steam volume under different extraction steam volumes; An automatic optimization loop for heat conversion load is designed, which determines the target load according to the actual heating demand and the operating status of the unit, and sets the optimal comprehensive valve position under different target loads; a PID controller is used to dynamically adjust the actual valve position to obtain a heat conversion load correction coefficient when the actual valve position is the same as the optimal comprehensive valve position, and the heat conversion load is adjusted according to the heat conversion load correction coefficient to obtain the optimal heat conversion load.

2. The automatic optimization calculation method for heating load conversion based on the load conversion coefficient method according to claim 1 is characterized in that: The corresponding relationship between the power generation power and the main steam flow rate under different heating extraction steam flow rates is expressed by the formula: Main steam flow = F (power generation, heating steam extraction).

3. The automatic optimization calculation method for heating load conversion based on load conversion coefficient method according to claim 2 is characterized in that: Based on the difference in power generation, the extraction steam flow rate converted load is calculated according to the corresponding relationship between the heating extraction steam converted load and the heating extraction steam volume at different extraction steam volumes, specifically: The average value of the difference in power generation is used as the basis for calculating the heat extraction steam converted load. The extraction steam flow rate converted load per preset unit under different heat extraction steam volumes is calculated. The calculation results are analyzed to obtain the corresponding relationship between the heat extraction steam converted load and the heat extraction steam volume under different extraction steam volumes. The corresponding curve function of the heat extraction steam flow rate and the heat extraction load is fitted by linear regression, where: The corresponding relationship between the heating extraction steam flow rate and the extraction steam flow rate converted load under different extraction steam volumes is expressed as follows: P G =K i ×G; Where P G Indicates the converted load of heating extraction steam; K i It indicates the conversion correction coefficient of heating extraction steam under different extraction steam capacities; G indicates the heating extraction steam capacity.

4. The automatic optimization calculation method for heating load conversion based on load conversion coefficient method according to claim 3 is characterized in that: When the actual heating demand changes, the heating converted load automatic optimization circuit adjusts the target load according to the current actual heating demand and unit status; when the heating converted load changes, the heating converted load correction coefficient remains unchanged.

5. The automatic optimization calculation method for heating load conversion based on load conversion coefficient method according to claim 4 is characterized in that: The PID controller includes proportional control, integral control and differential control, among which: The proportional control adjusts the correction coefficient according to the error between the actual value and the target value of the heating converted load, which can be expressed as: P out =K p ×e(t); Where P out Represents the output of proportional control; K p represents the proportionality coefficient; e(t) represents the error between the actual value and the target value of the heating load; The integral control adjusts the correction coefficient based on the accumulated historical errors and eliminates the long-term errors, which can be expressed as: In the formula, I out Represents the output of integral control; K i represents the integral coefficient; Indicates the cumulative value of the error; The differential control adjusts the correction coefficient by predicting the changing trend of the error, which can be expressed as: Where D out Represents the output of differential control; K d represents the differential coefficient; Indicates the rate of change of error.

6. The automatic optimization calculation method for heat supply conversion load based on load conversion coefficient method according to claim 5 is characterized in that: The total output of the PID controller is PID out , expressed as: PID out =P out +I out +D out 。 7. The automatic optimization calculation system for heating load conversion based on the load conversion coefficient method is characterized by: The system includes a data acquisition module, a fitting module, a difference calculation module, a load calculation module, a target load determination module, a control module and an adjustment module, wherein: The data acquisition module is used to acquire relevant data under different heating extraction steam flow rates according to the unit design heating condition diagram, including power generation power and main steam flow rate; The fitting module is used to fit the corresponding relationship curve formula according to the relevant data; The difference calculation module is used to calculate the difference in power generation corresponding to the heating extraction steam volume under a specific main steam flow rate according to the fitted corresponding relationship curve formula; The load calculation module is used to calculate the heat extraction steam flow rate converted load based on the difference in power generation; The target load determination module is used to determine the target load according to the actual heating demand and set the optimal comprehensive valve position under different target loads; The control module has a built-in PID controller, which uses the PID controller to dynamically adjust the actual valve position to obtain the heating load correction coefficient when the actual valve position is the same as the optimal final valve position; The adjustment module is used to adjust the heating converted load according to the heating converted load correction coefficient to obtain the optimal heating converted load.

8. The automatic optimization calculation system for heat supply conversion load based on load conversion coefficient method according to claim 7 is characterized in that: The difference calculation module is specifically: The average value of the difference in power generation is used as the basis for calculating the heat extraction steam converted load. The extraction steam flow rate converted load per preset unit under different heat extraction steam volumes is calculated. The calculation results are analyzed to obtain the corresponding relationship between the heat extraction steam converted load and the heat extraction steam volume under different extraction steam volumes. The corresponding curve function of the heat extraction steam flow rate and the heat extraction load is fitted by linear regression, where: The corresponding relationship between the heating extraction steam flow rate and the extraction steam flow rate converted load under different extraction steam volumes is expressed as follows: P G =K i ×G; Where P G Indicates the converted load of heating extraction steam; K i It indicates the conversion correction coefficient of heating extraction steam under different extraction steam capacities; G indicates the heating extraction steam capacity.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, it implements the automatic optimization calculation method for heating converted load based on the load conversion coefficient method as described in any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it implements the automatic optimization calculation method for heating converted load based on the load conversion coefficient method as described in any one of claims 1 to 6.

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