Thermal power generating unit primary frequency modulation dynamic optimization method based on real-time data

Abstract

The invention discloses a thermal power generating unit primary frequency modulation dynamic optimization method based on real-time data, and belongs to the technical field of thermal power generating unit primary frequency modulation. According to the method, a frequency modulation instruction correction function A related to a load section and a frequency modulation instruction correction function B related to a main gas pressure value are set; the third frequency modulation instruction correction function, the fourth frequency modulation instruction correction function, the fifth frequency modulation instruction correction function and the fourth frequency modulation instruction correction function are related to the unit load, the primary frequency modulation action frequency modulation quantity, the actual load at a certain moment after the primary frequency modulation action and the empirical coefficient, and finally the corrected frequency modulation quantity Py is obtained. The method has the advantages of small influence on unit operation, high economical efficiency, strong operability, high safety and high control accuracy, and ensures that test regulation assessment indexes are met, that is, a scheduling assessment system is met, and rapid recovery of the power grid frequency is realized.

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 primary frequency regulation dynamic optimization method of thermal power units based on real-time data. Background Art

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

[0003] The existing standards "Guidelines for Primary Frequency Regulation Test and Performance Acceptance of Thermal Power Generator Sets" (GB / T30370-2022) and "Technical Regulations and Test Guidelines for Primary Frequency Regulation of Grid-connected Power Sources" (GB / T 40595-2021) both set the main test assessment indicator - the speed inequality rate at 4% to 5%, which is a significant change from the previous 3% to 6%. A large number of thermal power units are difficult to meet the requirements, that is, the action amplitude cannot reach the required value, which is reflected in the dispatching assessment system as low frequency contribution and contribution rate. Even if the various indicators of the unit action meet the requirements during the test, it is difficult to ensure that it will not be assessed every month. Frequency regulation actions occur all the time. When the operating conditions are not ideal, it is easy to cause the primary frequency regulation performance to decline and various indicators to fail.

[0004] The existing primary frequency modulation optimization methods include using external intelligent controllers to study control strategies based on historical data. This method requires external equipment, poses certain risks to the network, has high investment, long optimization cycle, and is difficult to modify parameters. It can even only be operated by the manufacturer. There are also methods that use valve optimization to change the intake characteristics of the turbine speed control system to achieve primary frequency modulation optimization. This method is only effective when the valve characteristics are very unsatisfactory, and the effect is not obvious in most cases. Other methods optimize the combustion system, DEH control system, etc. The logic is relatively complex and the effect is good in coordinated control, but the effect on primary frequency modulation is average. 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] In order to solve the technical problems in the above background technology, the technical solution of a method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data is 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, and 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. At this time, according to the characteristics of conventional units, the frequency regulation characteristics of units in different load segments are different, so the frequency regulation instruction correction function A related to the load segment is set. The input value of the frequency regulation instruction correction function A is the load amount, 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, a 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 acted upon by the primary frequency regulation is P x , the unit speed inequality 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, the load capacity of the coal-fired unit should be 75%P 15 seconds after the primary frequency regulation action. x , 30 seconds after the first 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] ①If 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 capacity 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, i.e. 75% P x -(P T1 -P0), as the input of frequency modulation instruction correction function C, the final output is 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 first 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, i.e. 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 later action in the direction of unit 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 condition of output frequency modulation correction coefficient D, then 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 capacity 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 the output frequency modulation correction coefficient E, 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 the primary frequency modulation 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 When <0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of the primary 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, 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 that should be obtained for a single frequency modulation is 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 that should be obtained for a single frequency modulation is 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 primary frequency modulation should be obtained as above. 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 primary frequency modulation should be obtained as above. x In the geometric relationship formula, E is replaced by 0.

[0020] Through the above design scheme, the present invention can bring the following beneficial effects: in the DCS system, the frequency regulation load is corrected by using the main influencing factors such as the current load condition and the main gas pressure, so that the actual frequency regulation amount of a frequency regulation action reaches the theoretical value; according to the real-time data, the frequency regulation instruction is corrected in time for the failure to meet the frequency regulation action amount, which has little impact on the operation of the unit, has high economy, strong operability, high safety, high control accuracy, ensures 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 is 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 the 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 the embodiment of the present invention.

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

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

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the following is a further detailed description of a method for dynamic optimization of primary frequency regulation of a thermal power unit based on real-time data in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of 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, the load points X1,X2,..X n Satisfy P e >X1>X2>X3...>X0. Figure 1 As shown, the frequency modulation instruction correction function A related to the load segment is set, the load amount is input, and the frequency modulation correction coefficient A is output.

[0029] (2) Figure 1 As shown, a 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 to be activated by the primary frequency regulation is Px, the unit speed difference 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 the 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 1. When the value of the left input terminal is smaller 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 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 larger than that of the right input terminal, G outputs a digital signal of 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 of 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, the load points X1,X2,..X n Satisfy P e >X1>X2>X3...>X0. Figure 1 As shown, the frequency modulation instruction correction function A related to the load segment is set, the load amount is input, and the frequency modulation correction coefficient A is output.

[0036] (2) Figure 1 As shown, a 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 acted upon by the primary frequency regulation is P x , the unit speed inequality 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 the 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 1. When the value of the left input terminal is smaller 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 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 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 larger than that of the right input terminal, G outputs a digital signal of 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 of 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 peak load point X0, the load point is divided into 7+1 working conditions, and 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, the frequency modulation instruction correction function A related to the load segment is set, the load amount is input, and the frequency modulation correction coefficient A is output.

[0043] (2) Figure 1 As shown, a 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 acted upon by the primary frequency regulation is P x , the unit speed inequality is set to N, N is a constant, and 4% ≤ N ≤ 5%. The actual load at the 10th second 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 the 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 1. When the value of the left input terminal is smaller 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 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 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 larger than that of the right input terminal, G outputs a digital signal of 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 of 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 in that: (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, and 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 acted upon by the primary frequency regulation is P x , the unit speed inequality 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 the primary frequency modulation 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 When <0, the frequency modulation correction coefficient A, frequency modulation correction coefficient B and the frequency modulation amount P of the primary 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 P x , P T1 , P0, Z do not meet the conditions of the output frequency modulation correction coefficient C. The frequency modulation amount P that should be acted upon in a frequency modulation is obtained as above. 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 frequency modulation amount P that should be acted on in the above-mentioned primary frequency modulation is obtained x In the geometric relationship of x ,P0,P T2 , Z cannot meet the condition of output frequency modulation correction coefficient D, the above-mentioned frequency modulation amount P that should be acted upon for a single frequency modulation is obtained x In the geometric relationship of x ,P0,P T2 , Z cannot meet the conditions of the output frequency modulation correction coefficient E. The frequency modulation amount P that should be acted upon in a single frequency modulation is obtained as above. 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 thermal power units 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 performed, 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, i.e. 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 thermal power units 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 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, i.e. 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 thermal power units 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 , 30s 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 thermal power units 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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