A dynamic optimization method for primary frequency regulation of thermal power units based on real-time data

Abstract

The present invention provides a method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data, belonging to the technical field of primary frequency regulation of thermal power units. The present invention sets a frequency regulation instruction correction function A related to the load segment, a frequency regulation instruction correction function B related to the main gas pressure value, and frequency regulation instruction correction functions C, D, E, and F related to the unit load, the frequency regulation amount to be activated by the primary frequency regulation, the actual load at a certain moment after the primary frequency regulation is activated, and an empirical coefficient, thereby finally obtaining a corrected frequency regulation amount Py. The method of the present invention has a minimal impact on the operation of the unit, is highly economical, highly operable, highly safe, and has high control accuracy, ensuring that the test procedure assessment indicators are met, that is, that the dispatch assessment system is met, and that the power grid frequency is rapidly restored.

Description

Technical Field

[0001] The invention belongs to the technical field of primary frequency regulation of thermal power units, and in particular relates to a dynamic optimization method for primary frequency regulation of thermal power units based on real-time data. Background Art

[0002] The power grid has increasingly higher requirements for the primary frequency regulation of thermal power units, and the assessment is becoming more and more stringent.

[0003] The existing standards, "Guidelines for Testing and Performance Acceptance of Primary Frequency Regulation of Thermal Power Generator Sets" (GB / T30370-2022) and "Technical Regulations and Testing Guidelines for Primary Frequency Regulation of Grid-Connected Power Sources" (GB / T 40595-2021), both set the speed inequality, a key test performance indicator, at 4% to 5%. This represents a significant change from the previous 3% to 6%. Many thermal power units struggle to meet this requirement, meaning their operating amplitudes fail to reach the required values. This is reflected in the dispatching and assessment system as low frequency regulation contributions and contribution rates. Even if unit operation indicators meet the requirements during testing, it is difficult to guarantee that they will not be assessed monthly. Frequency regulation occurs constantly, and when it does, suboptimal operating conditions can easily lead to a decline in primary frequency regulation performance and failure of various indicators.

[0004] Existing methods for optimizing primary frequency regulation include using external intelligent controllers to research control strategies based on historical data. However, this approach requires external equipment, poses certain risks to the network, requires high investment, has a long optimization cycle, and makes parameter modification difficult, often requiring only the manufacturer to operate. Other methods utilize valve optimization to modify the intake characteristics of the turbine speed control system to optimize primary frequency regulation. This method is only effective when valve characteristics are extremely suboptimal; in most cases, the effect is insignificant. Other methods optimize combustion systems, DEH control systems, and other systems. These methods have relatively complex logic and are effective for coordinated control, but their effectiveness for primary frequency regulation is limited. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for dynamic optimization of primary frequency regulation of thermal power units, which can not only make the speed inequality rate of the frequency regulation performance index meet the requirement of 4% to 5%, but also have little impact on the operation of the unit, and has high economy, strong operability, high safety and high control accuracy.

[0006] To solve the technical problems in the above background technology, the present invention provides a technical solution for a method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data as follows:

[0007] (1) First, according to the unit capacity P e and the lowest depth peak load point X0, the load point is divided into n+1 working conditions, where n < 10, the working conditions are divided into P e ~X1,X1~X2,X2~X3,X3~X4...Xn ~X0 load segment, where load points X1, X2, ..X n Satisfy P e >X1>X2>X3...>X0. Based on conventional unit characteristics, different load ranges have different unit frequency regulation characteristics. Therefore, a frequency regulation instruction correction function A related to the load range is set. The input value of frequency regulation instruction correction function A is the load, and the output is the frequency regulation correction coefficient A. The specific correction value is set according to the actual unit characteristics.

[0008] (2) When the network frequency fluctuates, the actual main gas pressure value P T It affects the current action frequency modulation load, causing a certain deviation between the actual action frequency modulation load and the theoretical value. Therefore, the frequency modulation instruction correction function B related to the main gas pressure value is set. The input is the main gas pressure value, and the output is the frequency modulation correction coefficient B. The frequency modulation correction coefficient B needs to be determined through experiments.

[0009] (3) According to the real-time load data, the load of the unit at the time of frequency change is P0, and the frequency regulation amount to be adjusted in one frequency regulation is P x , the unit speed differential rate is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at T1 seconds after a frequency modulation action is P T1 , the actual load at T2 seconds after a frequency modulation action is P T2 Among them, 9s≤T1<12s, 15s≤T2<22s, and the specific values ​​of T1 and T2 are set according to the frequency regulation response characteristics of the unit.

[0010] According to the "Guidelines for Primary Frequency Regulation Test and Performance Acceptance of Thermal Power Generating Units" (GB / T30370-2022), the time for a coal-fired unit to reach 75% of the target load should be no more than 15 seconds, and the time to reach 90% of the target load should be no more than 30 seconds. That is, 15 seconds after the primary frequency regulation action, the load capacity of the coal-fired unit should be 75% of the target load. x , 30 seconds after a frequency modulation action, the load of the coal-fired unit should be 90%P x .

[0011] Setting and P x 、P T1 , P0, Z-related frequency modulation instruction correction function C, where Z is the empirical coefficient determined by the experiment, Z>N / 4%;

[0012] ① If P x >0,P T1 -P0<60%P x , it proves that the amplitude of the rising direction action is insufficient; if P x <0,P0-P T1 <-60%P x, it proves that the amplitude of the falling direction action is insufficient. In the above two cases, the load of the coal-fired unit should reach 75%P 15s after a frequency modulation action. x , minus the actual load P at T1 second after a frequency modulation action T1 The difference between the unit load P0 at the time of frequency change, that is, 75% P x -(P T1 -P0), as the input of the frequency modulation instruction correction function C, the final output is the frequency modulation correction coefficient C;

[0013] ②If P x >0,P T1 -P0>Z×P x , it proves that the amplitude of the rising direction action is too large; if P x <0,P0-P T1 >-Z×P x , it proves that the amplitude of the action in the descending direction is too large. The amplitude of the action is |P T1 -P0|, the action amplitude is greater than the frequency modulation amount of the primary frequency modulation|P x ∣After a certain multiple Z, the final stable load is too high, the actual inequality is less than 4%, and the stability error is too large. In the above two cases, the load of the coal-fired unit should reach 75% P 15s after the frequency modulation action. x , minus the actual load P at T1 second after a frequency modulation action T1 The difference between the unit load P0 at the time of frequency change, that is, 75% P x -(P T1 -P0), as the input of the frequency modulation instruction correction function D, the final output is the frequency modulation correction coefficient C1;

[0014] ③If P x 、P T1 , P0, and Z do not meet the conditions for outputting the frequency modulation correction coefficient C or the frequency modulation correction coefficient C1, the final output value is 0.

[0015] (4) Setting and P x , P0, P T2 , Z-related frequency modulation instruction correction function E, if P x >0,P T2 -P0<90%P x , it proves that the amplitude of the unit's later action in the ascending direction is too small and does not meet the requirements; if P x <0,P0-P T2 <-90%P x , it proves that the amplitude of the unit's later action in the direction of reduction is too small and does not meet the requirements. In the above two cases, the load of the coal-fired unit should reach 90% Px 30s after the first frequency modulation action, minus the actual load P at T2 seconds after the first frequency modulation action. T2The difference between the unit load P0 at the time of frequency change, that is, 90% P x -(P T2 -P0), as the input of the frequency modulation instruction correction function E, the final output is the frequency modulation correction coefficient D.

[0016] If P x , P0, P T2 , Z cannot meet the conditions for outputting the frequency modulation correction coefficient D, the final output value is 0.

[0017] (5) Setting and P x , P0, P T2 , Z-related frequency modulation instruction correction function, if P x >0,P T2 -P0>Z×P x , it proves that the amplitude of the unit's ascending direction action is too large; if P x <0,P0-P T2 >-Z×P x , it proves that the amplitude of the unit's step-down action is too large. In the above two cases, the load of the coal-fired unit should reach 90% P 30s after the frequency modulation action. x , minus the actual load P of the coal-fired unit at T2 seconds after a frequency modulation action T2 The difference between the unit load P0 at the time of frequency change, that is, 90% P x -(P T2 -P0), as the input of the frequency modulation instruction correction function, the final output is the frequency modulation correction coefficient E.

[0018] If P x , P0, P T2 , Z cannot meet the conditions of outputting the frequency modulation correction coefficient E, then the final output value is 0.

[0019] (6) The frequency modulation correction coefficient A, frequency modulation correction coefficient B, frequency modulation correction coefficient C, frequency modulation correction coefficient C1, frequency modulation correction coefficient D, and frequency modulation correction coefficient E are all positive numbers, P x > 0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of a frequency modulation should be x After multiplication, subtract the frequency modulation correction coefficient C and the frequency modulation correction coefficient C1, and then subtract the frequency modulation correction coefficient D and the frequency modulation correction coefficient E, and finally get the corrected frequency modulation amount P y ;P x <0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of a frequency modulation should be x After multiplication, add the frequency modulation correction coefficient C and the frequency modulation correction coefficient C1, and then subtract the frequency modulation correction coefficient D and the frequency modulation correction coefficient E, and finally get the corrected frequency modulation amount P y ; the Px 、P T1 When P0 and Z do not meet the conditions of the output frequency modulation correction coefficient C, the frequency modulation amount P obtained by the above method should be x In the geometric relationship of x 、P T1 When P0 and Z do not meet the conditions of the output frequency modulation correction coefficient C1, the frequency modulation amount P obtained by the above method should be x In the geometric relationship of x , P0, P T2 When Z cannot satisfy the condition of output frequency modulation correction coefficient D, the frequency modulation amount P of the frequency modulation should be obtained by the above method. x In the geometric relationship of x , P0, P T2 When Z cannot satisfy the condition of output frequency modulation correction coefficient E, the frequency modulation amount P of the frequency modulation should be obtained by the above method. x In the geometric relationship formula, E is replaced by 0.

[0020] Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the frequency regulation load is corrected in the DCS system using the current load condition, main gas pressure and other major influencing factors, so that the frequency regulation amount of the actual frequency regulation action of one frequency regulation reaches the theoretical value; based on real-time data, the frequency regulation instruction is corrected in time for the frequency regulation action amount that is not met, which has a small impact on the operation of the unit, is highly economical, has strong operability, is relatively safe, and has high control accuracy, ensuring that the test procedure assessment indicators are met, that is, the dispatch assessment system is met, and the power grid frequency is quickly restored. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 This is a calculation logic diagram of the frequency modulation correction coefficient A and the frequency modulation correction coefficient B in an embodiment of the present invention.

[0023] Figure 2 This is a calculation logic diagram of the frequency modulation correction coefficient C and the frequency modulation correction coefficient C1 in an embodiment of the present invention.

[0024] Figure 3 4 is a logic diagram for calculating the frequency modulation correction coefficient D in an embodiment of the present invention.

[0025] Figure 4 4 is a logic diagram for calculating the frequency modulation correction coefficient E in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, a method for dynamic optimization of primary frequency regulation of a thermal power plant based on real-time data is described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention.

[0027] Example 1

[0028] (1) First, according to the unit capacity P e and the lowest depth peak load point X0, the load point is divided into 9+1 working conditions, the working conditions are divided into P e ~X1,X1~X2,X2~X3,X3~X4...X9~X0 load segment, among which, load points X1,X2,..X n Satisfy P e >X1>X2>X3...>X0. Figure 1 As shown, set the frequency modulation instruction correction function A related to the load segment, input the load amount, and output the frequency modulation correction coefficient A.

[0029] (2) Figure 1 As shown, the frequency modulation instruction correction function B related to the main gas pressure value is set, the main gas pressure value is input, and the frequency modulation correction coefficient B is output.

[0030] (3) According to the real-time load data, the load of the unit at the time of frequency change is P0, the frequency adjustment amount of the primary frequency regulation is Px, the unit speed differential rate is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at the 9th second after the primary frequency regulation is P 9s , the actual load at 15 seconds after a frequency modulation action is P 15s。 like Figure 2 As shown in the logic diagram, the CMP module is used to compare the values ​​of two input terminals. The output terminals are G, E, and L. When the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is less than that of the right input terminal, L inputs a signal 1. Figure 2 The logic diagram shown shows that P x >0,P 9s -P0<60%P x , the frequency modulation instruction correction function C takes effect and finally outputs the frequency modulation correction coefficient C.

[0031] (4) Figure 3 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. When the value of the left input terminal is larger than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 3 The logic diagram shown in the figure shows that Px >0,P 15s -P0<90%P x , the frequency modulation instruction correction function E takes effect and finally outputs the frequency modulation correction coefficient D.

[0032] (5) Figure 4 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. If the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. If the values ​​of the two input terminals are equal, E inputs 1. If the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 4 The logic diagram shown in the figure shows that P x >0,P 15s -P0<90%P x , the frequency modulation instruction correction function has taken effect, and the final output is 0.

[0033] (6) Corrected frequency modulation amount P y P y =A×B×P x -C-D.

[0034] Example 2

[0035] (1) First, according to the unit capacity P e and the lowest depth peak load point X0, the load point is divided into 9+1 working conditions, the working conditions are divided into P e ~X1,X1~X2,X2~X3,X3~X4...X9~X0 load segment, among which, load points X1,X2,..X n Satisfy P e >X1>X2>X3...>X0. Figure 1 As shown, set the frequency modulation instruction correction function A related to the load segment, input the load amount, and output the frequency modulation correction coefficient A.

[0036] (2) Figure 1 As shown, the frequency modulation instruction correction function B related to the main gas pressure value is set, the main gas pressure value is input, and the frequency modulation correction coefficient B is output.

[0037] (3) According to the real-time load data, the load of the unit at the time of frequency change is P0, and the frequency regulation amount to be adjusted in one frequency regulation is P x , the unit speed differential rate is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at the 11th second after a frequency modulation action is P 11s , the actual load at 21 seconds after a frequency modulation action is P 21s .like Figure 2As shown in the logic diagram, the CMP module is used to compare the values ​​of two input terminals. The output terminals are G, E, and L. When the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is less than that of the right input terminal, L inputs a signal 1. Figure 2 The logic diagram shown in the figure shows that P x <0,P0-P 11s <-60%P x , the frequency modulation instruction correction function C takes effect and finally outputs the frequency modulation correction coefficient C.

[0038] (4) Figure 3 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. When the value of the left input terminal is larger than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 3 The logic diagram shown, judge that P x <0,P0-P 21s <-90%P x , the frequency modulation instruction correction function E takes effect and finally outputs the frequency modulation correction coefficient D.

[0039] (5) Figure 4 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. If the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. If the values ​​of the two input terminals are equal, E inputs 1. If the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 4 The logic diagram shown in the figure shows that P x <0,P0-P 21s <-90%P x , the frequency modulation instruction correction function has taken effect, and the final output is 0.

[0040] (6) Corrected frequency modulation amount P y P y =A×B×P x +C-D.

[0041] Example 3

[0042] (1) First, according to the unit capacity P e and the lowest depth peak load point X0, the load point is divided into 7+1 working conditions, the working conditions are divided into P e ~X1,X1~X2,X2~X3,X3~X4...X7~X0 load segment, among which, load points X1,X2...X n Satisfy P e >X1>X2>X3...>X0. Figure 1As shown, set the frequency modulation instruction correction function A related to the load segment, input the load amount, and output the frequency modulation correction coefficient A.

[0043] (2) Figure 1 As shown, the frequency modulation instruction correction function B related to the main gas pressure value is set, the main gas pressure value is input, and the frequency modulation correction coefficient B is output.

[0044] (3) According to the real-time load data, the load of the unit at the time of frequency change is P0, and the frequency regulation amount to be adjusted in one frequency regulation is P x , the unit speed differential rate is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at 10 seconds after a frequency modulation action is P 10s , the actual load at 18 seconds after a frequency modulation action is P 18s。 like Figure 2 As shown in the logic diagram, the CMP module is used to compare the values ​​of two input terminals. The output terminals are G, E, and L. When the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is less than that of the right input terminal, L inputs a signal 1. Figure 2 The logic diagram shown in the figure shows that P x >0,P 10s -P0>Z×P x , the frequency modulation instruction correction function C takes effect and finally outputs the frequency modulation correction coefficient C1.

[0045] (4) Figure 3 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. When the value of the left input terminal is larger than that of the right input terminal, G outputs a digital signal 1. When the values ​​of the two input terminals are equal, E inputs a 1. When the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 3 The logic diagram shown, judge that P x >0,P 18s -P0>90%P x , the frequency modulation instruction correction function E takes effect and finally outputs 0.

[0046] (5) Figure 4 As shown, the CMP module is used to compare the values ​​of two input terminals, and the output terminals are G, E, and L. If the value of the left input terminal is greater than that of the right input terminal, G outputs a digital signal 1. If the values ​​of the two input terminals are equal, E inputs 1. If the value of the left input terminal is smaller than that of the right input terminal, L inputs a signal 1. Figure 4 The logic diagram shown in the figure shows that P x >0,P 18s -P0<Z×P x , the frequency modulation instruction correction function has taken effect, and the final output is 0.

[0047] (6) Corrected frequency modulation amount P y P y =A×B×P x -C1.

Claims

1. A method for dynamic optimization of primary frequency regulation of thermal power units based on real-time data, characterized by: (1) First, according to the unit capacity P e and the lowest depth peak load point X0, the load point is divided into n+1 working conditions, where n < 10, the working conditions are divided into P e ~X1,X1~X2,X2~X3,X3~X4...X n ~X0 load segment, where load points X1, X2, ..X n Satisfy P e >X1>X2>X3...>X0, set the frequency modulation instruction correction function A related to the load segment. The input value of the frequency modulation instruction correction function A is the load amount, and the output is the frequency modulation correction coefficient A. The specific correction value is set according to the actual unit characteristics; (2) Setting a frequency modulation instruction correction function B related to the main gas pressure value, the input is the main gas pressure value, and the output is the frequency modulation correction coefficient B, and the frequency modulation correction coefficient B is determined through experiments; (3) According to the real-time load data, the load of the unit at the time of frequency change is P0, and the frequency regulation amount to be adjusted in one frequency regulation is P x , the unit speed differential rate is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at T1 seconds after a frequency modulation action is P T1 , the actual load at T2 seconds after a frequency modulation action is P T2 , the specific values ​​of T1 and T2 are set according to the frequency regulation response characteristics of the unit; ① Setting and P x 、P T1 , P0, Z-related frequency modulation instruction correction function C, where Z is the empirical coefficient Z determined by the experiment, Z>N / 4%, and the final output frequency modulation correction coefficient C or 0; ②Setting and P x 、P T1 , P0, Z-related frequency modulation instruction correction function D, and finally output frequency modulation correction coefficient C1 or 0; (4) Setting and P x 、P T2 , P0, Z-related frequency modulation instruction correction function E, and finally output frequency modulation correction coefficient D or 0; (5) Setting and P x 、P T2 , P0, Z-related frequency modulation instruction correction function, and finally output frequency modulation correction coefficient E or 0; (6)P x > 0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of a frequency modulation should be x After multiplication, subtract the frequency modulation correction coefficient C and the frequency modulation correction coefficient C1, and then subtract the frequency modulation correction coefficient D and the frequency modulation correction coefficient E, and finally obtain the corrected frequency modulation amount P; P x <0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of a frequency modulation should be x After multiplication, add the frequency modulation correction coefficient C and frequency modulation correction coefficient C1, and then subtract the frequency modulation correction coefficient D and frequency modulation correction coefficient E to obtain the corrected frequency modulation amount P. y ; the P x 、P T1 , P0, Z do not meet the conditions of the output frequency modulation correction coefficient C, the above-mentioned frequency modulation amount P should be obtained once the frequency modulation is performed. x In the geometric relationship of x 、P T1 , P0, Z do not meet the conditions of the output frequency modulation correction coefficient C1, the above-mentioned frequency modulation should be the action frequency modulation amount P x In the geometric relationship of x , P0, P T2 , Z cannot meet the conditions of output frequency modulation correction coefficient D, the above-mentioned frequency modulation amount P should be obtained for a single frequency modulation. x In the geometric relationship of x , P0, P T2 , Z cannot meet the conditions of the output frequency modulation correction coefficient E, the above-mentioned frequency modulation amount P should be obtained for a single frequency modulation. x In the geometric relationship formula, E is replaced by 0.

2. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The frequency modulation correction coefficient A, the frequency modulation correction coefficient B, the frequency modulation correction coefficient C, the frequency modulation correction coefficient C1, the frequency modulation correction coefficient D, and the frequency modulation correction coefficient E are all positive numbers.

3. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The T1 and T2 satisfy 9s≤T1<12s, 15s≤T2<22s.

4. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The frequency modulation instruction correction function C satisfies P x >0,P T1 -P0<60%P x , or P x <0,P0-P T1 <-60%P x When the frequency modulation action is carried out, the load of the coal-fired unit should reach 75%P 15s after the frequency modulation action. x , minus the actual load P at T1 second after a frequency modulation action T1 The difference between the unit load P0 at the time of frequency change, that is, 75% P x -(P T1 -P0), as the input of the frequency modulation instruction correction function C, the final output frequency modulation correction coefficient C, when the condition for outputting the frequency modulation correction coefficient C is not met, the final output value is 0.

5. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The frequency modulation instruction correction function D satisfies P x >0,P T1 -P0>Z*P x , or P x <0,P0-P T1 >-Z*P x When the frequency modulation action is performed, the load of the coal-fired unit should reach 75% P 15 seconds after the frequency modulation action. x , minus the actual load P at T1 second after a frequency modulation action T1 The difference between the unit load P0 at the time of frequency change, that is, 75% P x -(P T1 -P0), as the input of the frequency modulation instruction correction function D, and finally outputs the frequency modulation correction coefficient C1. When the condition for outputting the frequency modulation correction coefficient C1 is not met, the final output value is 0.

6. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The frequency modulation instruction correction function E satisfies P x >0,P T2 -P0<90%P x , or P x <0,P0-P T2 <-90%P x 30 seconds after the first frequency modulation action, the load of the coal-fired unit should reach 90%P x , minus the actual load P at T2 seconds after a frequency modulation action T2 The difference between the unit load P0 at the time of frequency change, that is, 90% P x -(P T2 -P0), as the input of the frequency modulation instruction correction function E, the final output is the frequency modulation correction coefficient D. When the condition for outputting the frequency modulation correction coefficient D is not met, the final output value is 0.

7. The method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data according to claim 1, characterized in that: The frequency modulation instruction correction function satisfies P x >0,P T2 -P0>Z*Px, or P x <0,P0-P T2 >-Z*Px, 30s after the first frequency modulation action, the load of the coal-fired unit should reach 90%P x , minus the actual load P of the coal-fired unit at T2 seconds after a frequency modulation action T2 The difference between the unit load P0 at the time of frequency change, that is, 90% P x -(P T2 -P0), as the input of the frequency modulation instruction correction function, the final output is the frequency modulation correction coefficient E. If the condition for outputting the frequency modulation correction coefficient E is not met, the final output value is 0.

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