Thermoelectric decoupling based bypass frequency modulation control method and device

Abstract

The application discloses a bypass frequency modulation control method and device based on thermoelectric decoupling, relates to the technical field of thermal power generation control, and is characterized in that: based on the flow characteristics of a low bypass valve and the work ratio of each cylinder of a unit, a first action function of the low bypass valve for controlling a steam turbine unit is acquired; based on the peak-shaving frequency change rate of the steam turbine unit and the work ratio of each cylinder of the steam turbine unit, a second action function of the low bypass valve is determined; based on the peak-shaving frequency change rate of the steam turbine unit and the work ratio of each cylinder of the steam turbine unit, a third action function of a high bypass valve for controlling the steam turbine unit is determined; the low bypass control instruction is determined according to the first action function and the second action function, the high bypass control instruction is determined based on the third action function and the low bypass control instruction; the opening of the low bypass valve is controlled according to the low bypass control instruction, and the opening of the high bypass valve is controlled according to the high bypass control instruction. The application solves the problem of the decline of the frequency modulation capability of a heating steam turbine unit under the minimum load.

Description

Technical Field

[0001] This invention relates to the field of thermal power generation control technology, and in particular to a bypass frequency regulation control method and device based on thermoelectric decoupling. Background Technology

[0002] The primary function of thermal power units is shifting towards frequency regulation and peak shaving, requiring numerous units to undergo flexibility modifications to support deep peak shaving. In northern regions, during the winter heating season, thermal power units are needed to provide a stable supply of heat to urban heating networks. Therefore, research is needed to address the winter operating conditions of thermal power units in northern regions, including studies on achieving thermoelectric decoupling of these units to lower the lower limit of peak shaving while ensuring heating capacity.

[0003] Currently, commonly used thermoelectric decoupling technologies include turbine high- and intermediate-pressure cylinder bypass heating, thermal storage tank heating, electric boiler heating, and low-pressure cylinder zero-output heating. Among these, turbine bypass heating technology involves desuperheating and depressurizing main steam and reheat steam before sending them to the heating network heaters via a bypass, thereby increasing the unit's heating capacity. However, after bypass heating is implemented, the turbine's work output decreases, lowering the lower limit of the unit's deep peak shaving capability.

[0004] During the unit startup phase, turbine temperature and pressure need to be regulated via a turbine bypass to control turbine startup and grid connection. Therefore, turbine bypasses are typically designed with 30% to 50% steam capacity. Thus, retrofitting the unit using bypass heating technology requires only a relatively small overall investment.

[0005] When bypass heating is put into operation, the peak load of the turbine unit will be greatly reduced. Under the original condition of the unit supplying maximum heating, the unit's electrical load was required to be maintained above 60%. After the bypass heating is put into operation, the peak load can generally be reduced to below 40%, and the peak load range is expanded by more than 40%. However, the unit's frequency regulation capability is greatly reduced under minimum load.

[0006] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section. Summary of the Invention

[0007] This invention provides a bypass frequency regulation control method based on thermoelectric decoupling, which solves the problem of a significant decrease in frequency regulation capability of steam turbine units under minimum load.

[0008] This bypass frequency modulation control method based on thermoelectric decoupling includes:

[0009] Based on the flow characteristics of the low bypass valve and the power ratio of each cylinder of the unit, the first action function for controlling the low bypass valve of the turbine unit is obtained, and based on the peak shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the second action function for controlling the low bypass valve is determined.

[0010] Based on the peak-shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the third action function for controlling the high-pressure bypass valve of the turbine unit is determined.

[0011] The low-side control instruction is determined based on the first action function and the second action function, and the high-side control instruction is determined based on the third action function and the low-side control instruction.

[0012] The opening degree of the low bypass valve is controlled according to the low bypass control command, and the opening degree of the high bypass valve is controlled according to the high bypass control command.

[0013] This invention also provides a bypass frequency regulation control device based on thermoelectric decoupling, which solves the problem of a significant decrease in frequency regulation capability of the unit under minimum load.

[0014] The bypass frequency modulation control device based on thermoelectric decoupling includes:

[0015] The low-level bypass signal unit acquires the first action function of the low-level bypass valve of the turbine unit, and determines the second action function of the low-level bypass valve based on the peak shaving frequency of the turbine unit and the power ratio of each cylinder of the turbine unit.

[0016] The high-voltage bypass signal unit determines the third action function for controlling the high-voltage bypass valve of the turbine unit based on the peak-shaving frequency of the turbine unit and the power ratio of each cylinder of the turbine unit.

[0017] The instruction generation unit determines a low-side control instruction based on the first action function and the second action function, and determines a high-side control instruction based on the third action function and the low-side control instruction.

[0018] The control unit controls the opening degree of the low bypass valve according to the low bypass control command, and controls the opening degree of the high bypass valve according to the high bypass control command.

[0019] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0020] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0021] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0022] In this embodiment of the invention, the bypass frequency regulation control method and device based on thermoelectric decoupling, for the bypass heating operation, relies on the short-term action of low bypass control commands and high bypass valve control commands to change the distribution ratio of heat load and electrical load. Especially under low load, it can increase the flow rate of working fluid entering the turbine side by actively reducing the demand for low bypass heating, so as to compensate for the problem of reduced frequency regulation capability under extremely low load and improve the frequency regulation capability of the bypass heating unit under deep peak shaving. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0024] Figure 1 This is a flowchart of a bypass frequency modulation control method based on thermoelectric decoupling according to an embodiment of the present invention.

[0025] Figure 2 This is a block diagram of a bypass frequency modulation control device based on thermoelectric decoupling according to an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0028] like Figure 1 , Figure 2 As shown, this embodiment of the invention provides a bypass frequency modulation control method based on thermoelectric decoupling, which includes:

[0029] Based on the flow characteristics of the low bypass valve and the power ratio of each cylinder of the unit, the first action function F1(x) for controlling the low bypass valve of the turbine unit is obtained, and based on the peak frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the second action function F2(x) for controlling the low bypass valve is determined.

[0030] Based on the peak-shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the third action function F3(x) for controlling the high-pressure bypass valve of the turbine unit is determined.

[0031] The low-side control instruction is determined based on the first action function F1(x) and the second action function F2(x), and the high-side control instruction is determined based on the third action function F3(x) and the low-side control instruction.

[0032] The opening degree of the low bypass valve is controlled according to the low bypass control command, and the opening degree of the high bypass valve is controlled according to the high bypass control command.

[0033] The bypass frequency regulation control method based on thermoelectric decoupling proposed in this invention, for bypass heating operation, relies on the short-term action of low bypass control commands and high bypass valve control commands to change the distribution ratio of heat load and electrical load. Especially under low load, it can increase the flow of working fluid entering the turbine side by actively reducing the demand for low bypass heating, so as to compensate for the problem of reduced frequency regulation capability under extremely low load and improve the frequency regulation capability of bypass heating units under deep peak shaving.

[0034] In this invention, the flow rate of the turbine unit at its low bypass inlet or heater outlet is controlled by a low bypass valve, and the flow rate of the turbine unit at its high bypass inlet or heater outlet is controlled by a high bypass valve.

[0035] In this invention, the low-voltage bypass control command is determined based on the first action function F1(x) and the second action function F2(x). Since the low-voltage bypass control command matches both the first action function F1(x) and the second action function F2(x), the low-voltage bypass control command action remains consistent, avoiding frequent fluctuations in the low-voltage bypass valve and balancing the flexibility and stability of turbine-side frequency regulation.

[0036] In an optional embodiment of the present invention, the low-side control command is determined based on the first action function F1(x) and the second action function F2(x), including:

[0037] Based on the heating demand of the turbine unit, a low bypass flow rate setpoint is generated;

[0038] The second action function F2(x) is superimposed with the low bypass flow setpoint and then input into the low bypass controller (PID) to generate the low bypass setpoint loop signal;

[0039] The first action function F1(x) is superimposed with the low-side setpoint circuit signal to generate the low-side control command.

[0040] In this implementation, the first action function F1(x) can directly act on the bypass control command, ensuring the rapid action of the bypass valve. Simultaneously, the second action function F2(x) is superimposed on the bypass flow setpoint and input to the bypass controller (PID) to ensure the consistency of its control loop. Specifically, when the first action function F1(x) is superimposed on the bypass control command, the priority action of the bypass valve will cause a change in the controlled variable of the bypass controller (PID). If the second action function F2(x) is not present at this time, the superposition direction of the bypass controller (PID) and the first action function F1(x) will be opposite, making it impossible to achieve the same-direction action of the bypass valve. If the first action function F1(x) and the second action function F2(x) are simultaneously matched and set, the bypass control command can always maintain consistent action, preventing repeated and frequent actions.

[0041] In one optional example of this implementation, the low bypass flow rate setpoint can be automatically generated or set by means of the turbine unit's heating demand.

[0042] In an optional embodiment of the present invention, determining the high-side control instruction based on the third action function F3(x) and the low-side control instruction includes:

[0043] Based on the heating demand of the turbine unit, a high bypass flow rate setpoint is generated;

[0044] The third action function F3(x) is superimposed with the high bypass flow setpoint and then input into the high bypass controller (PID) to generate the high bypass setpoint loop signal;

[0045] Based on the throttling characteristics of the low-pressure bypass valve and the high-pressure bypass valve, as well as the work ratio of the high-pressure cylinder and the medium-low-pressure cylinder, the fourth action function F4(x) is generated.

[0046] The fourth action function F4(x) is superimposed with the high-speed bypass setpoint circuit signal to generate the high-speed bypass control command.

[0047] In this implementation, the high-side bypass control command and the low-side bypass control command operate synchronously through the fourth action function F4(x), further increasing the consistency of the entire bypass regulation and improving the frequency regulation capability. Similarly, by using the third action function F3(x) to match the disturbance of the controlled object of the high-side bypass valve, it is possible to effectively prevent the high-side bypass valve from operating in the same direction and ensure the synchronization of the high-side bypass control command and the low-side bypass control command.

[0048] In an optional example of this implementation, a fourth action function F4(x) is generated based on the throttling characteristics of the low-pressure bypass valve and the high-pressure bypass valve, and the work ratio of the high-pressure cylinder and the medium-low-pressure cylinder, including:

[0049] The flow rate of the low-voltage bypass valve is obtained based on its flow characteristic curve.

[0050] The flow rate of the high pressure bypass valve is obtained based on the flow rate of the low pressure bypass valve and the work ratio of the high pressure cylinder and the medium and low pressure cylinders.

[0051] Based on the flow characteristic curve of the bypass valve and the flow rate of the bypass valve, the fourth action function F4(x) is determined.

[0052] In one alternative example, based on the formula derived from mass balance, the low bypass inlet flow rate = high bypass inlet flow rate + high bypass desuperheating water flow rate, and then the flow rate of the high bypass valve is obtained according to the above formula.

[0053] In an optional embodiment of the present invention, controlling the opening degree of the low-side bypass valve according to a low-side bypass control command and controlling the opening degree of the high-side bypass valve according to a high-side bypass control command includes:

[0054] When the opening degree of the bypass valve is greater than 15%, the bypass control command controls the bypass valve; and / or

[0055] When the opening degree of the bypass valve is greater than 10%, the bypass control command controls the bypass valve.

[0056] In this implementation, the low-frequency bypass valve only operates synchronously according to the low-frequency bypass control command under large frequency difference in the low-load area, effectively preventing frequent fluctuations of the low-frequency bypass valve and effectively ensuring that the frequency regulation load on the turbine side meets the grid requirements.

[0057] In an optional embodiment of the present invention, based on the peak-shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the unit, a second action function F2(x) for controlling the low-voltage bypass valve is determined, including:

[0058] Based on the peak-shaving frequency change rate of the turbine unit, determine the change in inlet flow rate into the intermediate and low-pressure cylinders of the turbine unit;

[0059] The second action function F2(x) is obtained based on the change in inlet flow rate of the intermediate-pressure cylinder and the change in work done by the intermediate-low-pressure cylinder.

[0060] In one optional example of this implementation, such as Figure 1 As shown, HP represents the high-pressure cylinder, IP represents the intermediate-pressure cylinder, and LP represents the low-pressure cylinder. The work ratio of the high-pressure cylinder to the intermediate-pressure cylinder (and the low-pressure cylinder) of the turbine unit is 1:2.

[0061] In an optional example, if the main steam flow rate of the turbine unit changes by ΔQ, then a rough estimate of the impact of the increase and decrease in flow rate on the work capacity when the low-voltage bypass operates can be made according to... We use this to approximate the expression, where λ is a correction coefficient that can be obtained by correcting experimental data.

[0062] In another optional example of this implementation, the work ratio of the high-pressure cylinder to the medium and low-pressure cylinders of the turbine unit can also be other values, depending on the actual design or performance data of the turbine unit.

[0063] In an optional embodiment of the present invention, the first action function F1(x) is obtained from the low bypass valve flow characteristic curve.

[0064] Furthermore, the first action function F1(x) was also modified using experimental data.

[0065] In an optional embodiment of the present invention, based on the peak-shaving frequency variation rate of the turbine unit and the outlet steam flow rate of the high-pressure cylinder of the turbine unit, a third action function F3(x) for controlling the high-pressure bypass valve of the turbine unit is determined, including:

[0066] Based on the peak-shaving frequency change rate of the turbine unit, determine the change in inlet flow rate of the high-pressure cylinder entering the turbine unit;

[0067] The third action function F3(x) is obtained based on the change in the inlet flow rate of the high-pressure cylinder and the change in the work done by the high-pressure cylinder.

[0068] In an optional example, the first action function F1(x), the second action function F2(x), the third action function F3(x), and the fourth action function F4(x) need to be modified based on the valve flow curve and test data.

[0069] Preferably, the turbine unit is a 350MW supercritical unit, with a main steam flow rate of 1089t / h under THA conditions (approximately 30t / h / 10MW). This means that for every 10MW load increase or decrease on the turbine side, the high-voltage bypass flow rate decreases / increases by 30t / h. Based on a maximum frequency regulation amplitude of 8% for 350MW, the maximum slip corresponds to 28MW. Assuming a speed unequal rate δ = 5%, the maximum slip is 2.3MW / rpm, resulting in a maximum slip of 12rpm. Based on the high-voltage and low-voltage bypass design parameters and data, the high-voltage and low-voltage bypass flow rate ratio is calculated to be approximately 1:2.

[0070] The first action function F1(x) is set to the values ​​in Table 1 below, where the slip is 3000 - actual speed.

[0071] Table 1: Values ​​of the first action function F1(x)

[0072] Slip rpm 10 8 6 4 -4 -6 -8 -10 Valve Command % -8 -4 -2 0 0 2 4 8

[0073] The second action function F2(x) is set to the values ​​shown in Table 2 below:

[0074] Table 2: Values ​​of the second action function F2(x)

[0075] Slip rpm 10 8 6 4 -4 -6 -8 -10 Flow rate setting t / h -69 -55.2 -41.4 0 0 41.4 55.2 69

[0076] The third action function F3(x) is set to the values ​​shown in Table 3 below:

[0077] Table 3: Values ​​of the third action function F3(x)

[0078] Slip rpm 10 8 6 4 -4 -6 -8 -10 Flow rate setting t / h -34.5 -27.6 -20.7 0 0 20.7 27.6 34.5

[0079] The fourth action function F4(x) is set to the values ​​shown in Table 4 below:

[0080] Table 4: Values ​​of the first action function F4(x)

[0081] Low-side instruction % 0 10 20 30 50 70 80 100 Valve Command % 0 5 12 16 25 35 40 45

[0082] The present invention also proposes a bypass frequency modulation control device based on thermoelectric decoupling, the device comprising:

[0083] The low-side signal unit acquires the first action function F1(x) for controlling the low-side valve of the turbine unit, and determines the second action function F2(x) for controlling the low-side valve based on the peak shaving frequency of the turbine unit and the inlet steam flow of the intermediate pressure cylinder of the turbine unit.

[0084] The high-pressure bypass signal unit determines the third action function F3(x) for controlling the high-pressure bypass valve of the turbine unit based on the peak-shaving frequency of the turbine unit and the outlet steam flow of the high-pressure cylinder of the turbine unit.

[0085] The instruction generation unit determines the low-side control instruction based on the first action function F1(x) and the second action function F2(x), and determines the high-side control instruction based on the third action function F3(x) and the low-side control instruction.

[0086] The control unit controls the opening degree of the low bypass valve according to the low bypass control command and controls the opening degree of the high bypass valve according to the high bypass control command.

[0087] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0088] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0089] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described bypass frequency modulation control method based on thermoelectric decoupling.

[0090] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0092] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0093] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0094] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bypass frequency modulation control method based on thermoelectric decoupling, characterized in that, The bypass frequency modulation control method includes: Based on the flow characteristics of the low bypass valve and the power ratio of each cylinder of the unit, the first action function for controlling the low bypass valve of the turbine unit is obtained, and based on the peak shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the second action function for controlling the low bypass valve is determined. Based on the peak-shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit, the third action function for controlling the high-pressure bypass valve of the turbine unit is determined. The low-side control instruction is determined based on the first action function and the second action function, and the high-side control instruction is determined based on the third action function and the low-side control instruction. The opening degree of the low bypass valve is controlled according to the low bypass control command, and the opening degree of the high bypass valve is controlled according to the high bypass control command.

2. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 1, characterized in that, The low-side control instruction is determined based on the first action function and the second action function, including: Based on the heating demand of the turbine unit, a low bypass flow rate setpoint is generated; The second action function is superimposed on the low bypass flow rate setting value and then input into the low bypass controller to generate the low bypass setting value loop signal. The first action function is superimposed with the low-side setpoint circuit signal to generate the low-side control command.

3. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 1 or 2, characterized in that, The high-side control instruction is determined based on the third action function and the low-side control instruction, including: Based on the heating demand of the turbine unit, a high bypass flow rate setpoint is generated; The third action function is superimposed on the high bypass flow rate setting value and then input into the high bypass controller to generate the high bypass setting value loop signal. Based on the throttling characteristics of the low-pressure bypass valve and the high-pressure bypass valve, as well as the work ratio of the high-pressure cylinder and the medium-low-pressure cylinder, a fourth action function is generated. The fourth action function is superimposed on the high-side setpoint circuit signal to generate the high-side control command.

4. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 3, characterized in that, Based on the throttling characteristics of the low-pressure bypass valve and the high-pressure bypass valve, and the work ratio of the high-pressure cylinder and the medium-low-pressure cylinder, a fourth action function is generated, including: The flow rate of the low-voltage bypass valve is obtained based on its flow characteristic curve. The flow rate of the high pressure bypass valve is obtained based on the flow rate of the low pressure bypass valve and the work ratio of the high pressure cylinder and the medium and low pressure cylinders. The fourth action function is determined based on the flow characteristic curve of the bypass valve and the flow rate of the bypass valve.

5. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 1, characterized in that, Controlling the opening degree of the low-side valve according to the low-side control command, and controlling the opening degree of the high-side valve according to the high-side control command, including: When the opening degree of the low-side bypass valve is greater than 15%, the low-side bypass control command controls the low-side bypass valve; and / or When the opening degree of the high-voltage bypass valve is greater than 10%, the high-voltage bypass control command controls the high-voltage bypass valve.

6. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 1, characterized in that, Based on the peak-shaving frequency variation rate of the turbine unit and the power ratio of each cylinder of the unit, the second action function for controlling the low-voltage bypass valve is determined, including: Based on the peak-shaving frequency change rate of the turbine unit, determine the change in inlet flow rate into the intermediate and low-pressure cylinders of the turbine unit; The second action function is obtained based on the change in inlet flow rate of the medium-low pressure cylinder and the change in work done by the medium-low pressure cylinder.

7. The bypass frequency modulation control method based on thermoelectric decoupling as described in claim 1, characterized in that, Based on the peak-shaving frequency variation rate of the turbine unit and the outlet steam flow rate of the high-pressure cylinder of the turbine unit, the third action function for controlling the high-pressure bypass valve of the turbine unit is determined, including: Based on the peak-shaving frequency change rate of the turbine unit, determine the change in inlet flow rate of the high-pressure cylinder entering the turbine unit; The third action function is obtained based on the change in the inlet flow rate of the high-pressure cylinder and the change in the work done by the high-pressure cylinder.

8. A bypass frequency modulation control device based on thermoelectric decoupling, characterized in that, The device includes: The low-level bypass signal unit acquires the first action function of the low-level bypass valve controlling the turbine unit, and determines the second action function of the low-level bypass valve based on the peak frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit. The high-voltage bypass signal unit determines the third action function for controlling the high-voltage bypass valve of the turbine unit based on the peak-shaving frequency change rate of the turbine unit and the power ratio of each cylinder of the turbine unit. The instruction generation unit determines a low-side control instruction based on the first action function and the second action function, and determines a high-side control instruction based on the third action function and the low-side control instruction. The control unit controls the opening degree of the low bypass valve according to the low bypass control command, and controls the opening degree of the high bypass valve according to the high bypass control command.

9. A computer 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 computer program, it implements the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 7.

11. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 7.

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