Frequency modulation control method and system for cogeneration unit under multi-heat-source heat supply

Abstract

The invention belongs to the technical field of frequency modulation control of coal-fired combined heat and power generation units, and discloses a frequency modulation control method and system for a combined heat and power generation unit under multi-heat-source heat supply. And whether the steam extraction opening needs to be switched or not is intelligently judged according to the actual operation condition, so that the efficient regulation and control of the steam extraction pressure are realized. When the steam extraction opening does not need to be switched, the steam extraction valve is accurately adjusted through the PID regulator by means of the deviation between the pressure feedback signal of the steam pipe network and the set value of the steam mother pipe, pressure disturbance caused by load fluctuation is effectively restrained, and dynamic balance of pressure is achieved. And when the steam extraction opening needs to be switched, the original steam extraction valve is closed firstly, then the new steam extraction valve is gradually adjusted through pressure feedback and PID adjustment, smooth transition of the switching process is guaranteed, and the heat supply system is prevented from being violently fluctuated and impacted.

Description

Technical Field

[0001] The present invention belongs to the technical field of frequency regulation control of coal-fired cogeneration units, and particularly relates to a frequency regulation control method and system for a cogeneration unit under multi-heat source heating. Background Art

[0002] With the continuous acceleration of industrialization, the demand for thermal energy by industrial enterprises has increased significantly, especially in high-energy-consuming industries such as steel, chemicals, and building materials, which have placed higher demands on efficient and stable thermal energy supply. As an important technical path to achieving combined heat and power and improving the comprehensive efficiency of energy utilization, cogeneration units are widely used in various industrial parks and urban heating systems because they can simultaneously meet the needs of electricity and heat, achieving cascaded energy utilization and comprehensive scheduling. By recycling waste heat from the power generation process to provide heating, cogeneration units not only improve overall energy utilization, but also effectively reduce fuel consumption and emissions, with significant economic and environmental benefits.

[0003] During the actual operation of a cogeneration unit, due to the structural design and system configuration, there are usually multiple heating extraction ports. The heating economy and energy efficiency of different extraction ports vary under different electrical loads. When the load is light, some extraction ports have better energy efficiency and economy; when the load is heavy, other extraction ports need to be selected to accommodate higher heating demands. Therefore, in actual operation, in order to ensure the economical and efficient operation of the unit, it is often necessary to switch between different heating extraction ports based on real-time load conditions and economic principles. However, switching extraction ports not only involves adjusting the steam distribution within the unit, but also affects the pressure of the entire heating network. If the switching is improperly controlled, it is easy to cause fluctuations in the heating pressure at the heat user end, affecting the continuity and stability of downstream industrial heat use, and may even cause disruptions to the heat user's production process or safety accidents.

[0004] The extraction steam pressure of the cogeneration unit is greatly affected by the changes in the electricity load. When the electricity load fluctuates, the extraction steam pressure will also fluctuate, and the changes in the extraction steam pressure will be directly transmitted to the heating system, resulting in unstable heating pressure. In the existing technology, traditional methods such as fixed value control and sequential switching are often used for adjustment, but these methods generally have problems such as response lag and low adjustment accuracy. It is difficult to quickly and accurately achieve dynamic pressure balance when the electricity load fluctuates frequently or switches over a large range. Some systems are switched through manual intervention and rely on the experience of the operator. The level of automation and intelligence is low, and it is easy to cause a decline in heating quality and economic losses due to untimely judgment or inaccurate operation.

[0005] How to ensure the economical operation of cogeneration units while also balancing the pressure stability and heat quality of the heating system has become a pressing technical challenge in the current industrial heating sector. To address this issue, developing frequency modulation control methods for cogeneration units that can achieve multi-heat source coordination, with real-time automatic adjustment and intelligent switching capabilities, has become a key development direction for improving the overall performance of heating systems and meeting the efficient heat utilization needs of modern industry. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problem that the heating extraction steam pressure varies with the fluctuation of the electrical load of the cogeneration unit, thereby affecting the stability of the heating supply, and to provide a frequency regulation control method and system for a cogeneration unit under multi-heat source heating.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a frequency regulation control method for a cogeneration unit under multi-heat source heating, comprising the following steps: After the unit's target electric and thermal load instruction changes, the changed unit's target electric and thermal load is processed to obtain the most economical heating steam extraction port, and whether the steam extraction port needs to be switched is determined based on the current unit's steam extraction port; If there is no need to switch the steam extraction port, the difference between the steam network pressure feedback signal and the steam main set value is calculated, and the output signal is given to the original steam extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric heating load instruction; If the steam extraction port needs to be switched, the original steam extraction valve is closed, and the difference between the steam network pressure feedback signal and the steam main set value is calculated. After passing through the PID regulator, the output signal is given to the new steam extraction valve as the target electric and heating load instruction of the unit; The center door adjustment command and the rotating partition adjustment command are adjusted through the target electric load command.

[0008] A further improvement of the present invention is that the specific method of adjusting the intermediate door adjustment instruction by the target electric load instruction is as follows: The target electric load instruction is converted into a reheat hot end extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the reheat hot end extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the reheat hot end is supplying heat, it is sent to the central control door adjustment instruction.

[0009] A further improvement of the present invention is that the specific method of adjusting the rotary partition adjustment instruction by the target electric load instruction is as follows: The target electric load instruction is converted into a fifth-stage extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the fifth-stage extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the fifth stage is supplying heat, it is sent to the rotating partition adjustment instruction.

[0010] In a second aspect, the present invention provides a frequency regulation control system for a cogeneration unit under multi-heat source heating, comprising: The switching judgment module is used to process the changed target electric and thermal load of the unit after the target electric and thermal load instruction of the unit changes, obtain the most economical heating steam extraction port, and determine whether the steam extraction port needs to be switched based on the current steam extraction port of the unit; The first regulating module is used to calculate the difference between the steam network pressure feedback signal and the steam main pipe set value when there is no need to switch the steam extraction port. After passing through the PID regulator, the output signal is given to the original steam extraction valve regulation instruction as the unit's target electric and heating load instruction; The second regulating module is used to close the original extraction valve when the steam extraction port needs to be switched, calculate the difference between the steam network pressure feedback signal and the steam main set value, and output a signal to the new extraction valve after passing through the PID regulator to provide an adjustment instruction as the unit's target electric and heating load instruction; The adjustment module is used to adjust the central door adjustment instruction and the rotating partition adjustment instruction through the target electric load instruction.

[0011] A further improvement of the present invention is that the function of the adjustment module is realized by the following method: The target electric load instruction is converted into a reheat hot end extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the reheat hot end extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the reheat hot end is supplying heat, it is sent to the central control door adjustment instruction.

[0012] A further improvement of the present invention is that the function of the adjustment module is realized by the following method: The target electric load instruction is converted into a fifth-stage extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the fifth-stage extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the fifth stage is supplying heat, it is sent to the rotating partition adjustment instruction.

[0013] In a third aspect, the present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the steps of a frequency regulation control method for a cogeneration unit under multi-heat source heating.

[0014] In a fourth aspect, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a frequency regulation control method for a cogeneration unit under multi-heat source heating.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can automatically select the optimal heating steam extraction port according to the principle of economy through real-time processing of changes in the target electric and thermal load instructions of the unit, and intelligently judge whether the steam extraction port needs to be switched according to the actual operating conditions, thereby achieving efficient regulation of the steam extraction pressure. When there is no need to switch the steam extraction port, the deviation between the steam network pressure feedback signal and the steam main pipe set value is used to accurately adjust the steam extraction valve through the PID regulator, effectively suppressing the pressure disturbance caused by load fluctuations and achieving dynamic balance of pressure; and when the steam extraction port needs to be switched, the original steam extraction valve is first closed, and then the new steam extraction valve is gradually adjusted through pressure feedback and PID regulation to ensure a smooth transition of the switching process and prevent drastic fluctuations and shocks in the heating system. At the same time, the method synchronously adjusts the adjustment instructions of the central door and the rotating partition in combination with the target electric load instruction, further coordinates the operation of each link, improves the coordination between heating and power generation, and improves the overall adjustment response speed of the system. Through automation and closed-loop control means, it can effectively reduce human operation errors and response lags, and improve the operational stability and safety of the system. Furthermore, the method possesses strong adaptability and flexibility, supporting joint optimization scheduling under multiple heat sources and various operating conditions. This fully leverages the economic and efficient nature of the cogeneration system, reduces energy consumption and operating costs, and improves thermal energy efficiency. Overall, this method not only enhances the heating system's ability to withstand fluctuations in electrical load, ensuring stable heating pressure and quality, but also improves the system's economical operation, safety, and reliability, demonstrating its broad application and promotional potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the present invention; Figure 2 is a system diagram of the present invention; Figure 3 This is a flow chart of Example 1; Figure 4 Schematic diagram of the electric heating load operation domain under different heat sources; Figure 5 This is a schematic diagram of Example 2. DETAILED DESCRIPTION

[0017] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0018] See also Figure 1 A frequency modulation control method for a cogeneration unit under multi-heat source heating comprises the following steps: S1, after the unit target electric and thermal load instruction changes, the changed unit target electric and thermal load is processed to obtain the most economical heating steam extraction port, and whether the steam extraction port needs to be switched is determined based on the current unit steam extraction port.

[0019] S2, if there is no need to switch the steam extraction port, the difference between the steam network pressure feedback signal and the steam main set value is calculated, and the output signal is given to the original steam extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric heating load instruction.

[0020] S3: If the steam extraction port needs to be switched, the original steam extraction valve is closed, and the difference between the steam network pressure feedback signal and the steam main set value is calculated. After passing through the PID regulator, the output signal is given to the new steam extraction valve as the unit's target electric and heating load instruction.

[0021] S4, adjusting the central door adjustment instruction and the rotating partition adjustment instruction through the target electric load instruction.

[0022] See also Figure 2 , a frequency regulation control system for a combined heat and power unit under multi-heat source heating, comprising: The switching judgment module is used to process the changed target electric and thermal load of the unit after the target electric and thermal load instruction of the unit changes, obtain the most economical heating steam extraction port, and judge whether the steam extraction port needs to be switched based on the current steam extraction port of the unit.

[0023] The first regulating module is used to make a difference between the steam network pressure feedback signal and the steam main pipe set value when there is no need to switch the steam extraction port, and output a signal to the original steam extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric heating load instruction.

[0024] The second regulation module is used to close the original extraction valve when the extraction port needs to be switched, make a difference between the steam network pressure feedback signal and the steam main pipe set value, and output a signal to the new extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric and heating load instruction.

[0025] The adjustment module is used to adjust the central door adjustment instruction and the rotating partition adjustment instruction through the target electric load instruction.

[0026] Example 1: See also Figure 3 Steam is extracted from the turbine reheat hot end or the fifth stage extraction port and delivered to heat users through the steam network. When the control system receives the unit's target heat load instruction and target electric load instruction, it analyzes and determines the most economical heat extraction port and controls the heat extraction port valve using the steam network main pipe pressure feedback signal. The specific steps are as follows: Step 1: Select the heating steam extraction port after the unit's target electric and heating load instruction changes: After the unit's target electric and thermal load instruction changes, the electric and thermal load instruction enters the heat source selection module for calculation. For cogeneration units, due to their thermoelectric coupling characteristics, the electric and thermal load range of each steam extraction port will be different. Figure 4As shown in the figure, the electric heat load operation range of different heating sources will be different. From the perspective of economy, it is necessary to give priority to the use of the fifth stage heating steam extraction. After obtaining the target electric load and heat load, according to Figure 4 Find the most economical steam extraction port for heating. Therefore, the most economical steam extraction port for heating is obtained in this module, and the need to switch the steam extraction port is determined based on the current steam extraction port of the unit. Step 2: Heating steam extraction valve action: After determining whether to switch the steam extraction port, if switching is not necessary, the steam network pressure feedback signal is subtracted from the steam main setpoint, passing through a PID controller and outputting a signal to the original extraction valve for adjustment. If switching is necessary, the original extraction valve is closed, and the steam network pressure feedback signal is subtracted from the steam main setpoint, passing through a PID controller and outputting a signal to the new extraction valve for adjustment. During this process, the utilization of stored heat in the steam network will cause slight fluctuations in the steam main pressure, but this feedback signal can be used to replenish steam through the heating extraction valve, thereby maintaining stable steam network main pressure and, in turn, stable heating pressure at the heat user.

[0027] Step 3: Adjust the heating extraction steam pressure: Since changes in electrical load will cause changes in the pressure of the heating extraction steam port, for the reheat hot end heating, there is a central gate to adjust the reheat hot end heating pressure. The target electrical load instruction is converted into a reheat hot end extraction steam heating pressure feedforward signal through function F1 (x). After the value is summed with the negative value of the reheat hot end extraction steam heating pressure and the heating extraction steam pressure setting value, the signal is output through the PID regulator. After it is determined that the reheat hot end is supplying heat, it is sent to the central gate adjustment instruction; for the fifth stage heating extraction steam, there is a rotary baffle to adjust the fifth stage extraction steam heating pressure; the target electrical load instruction is converted into a fifth stage extraction steam heating pressure feedforward signal through function F2 (x). After the value is summed with the negative value of the fifth stage extraction steam heating pressure and the heating extraction steam pressure setting value, the signal is output through the PID regulator. After it is determined that the fifth stage is supplying heat, it is sent to the rotary baffle adjustment instruction. During this process, the decrease in the unit's electrical load will lead to a decrease in the heating extraction steam pressure, so it is necessary to further close the center door or rotate the partition to increase the heating extraction steam pressure.

[0028] The present invention selects the most economical heating steam extraction port, takes into account the stability of heating, utilizes the heat storage characteristics of the steam pipe network, uses the steam main pipe pressure as a feedback signal, controls the action of the heating steam extraction valve, and uses the steam extraction pressure as a feedback signal to adjust the center door and the rotating partition, thereby achieving the best heating economy while ensuring the stability of heating.

[0029] This invention proposes a system that intelligently selects the most economical heating steam extraction port based on the characteristics of the cogeneration unit and the unit's heating economy, according to the electric and heating load instructions. Furthermore, it considers the stability of the heating supply, utilizes the heat storage characteristics of the steam network, and uses the steam main pressure as a feedback signal to control the operation of the heating steam extraction valve. This ensures stable heating while achieving optimal heating economy. Using the extraction pressure as a feedback signal, the center gate and rotating partition are adjusted to maintain stable heating pressure.

[0030] Example 2: See also Figure 5 As shown, the present invention also provides an electronic device 100 for a frequency regulation control method of a cogeneration unit under multi-heat source heating; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104.

[0031] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the frequency regulation control method for a cogeneration unit under multi-heat source heating as described in Example 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 can mainly include a program storage area and a data storage area. The program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data (such as audio data) created based on the use of the electronic device 100. In addition, the memory 101 can include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0032] The at least one processor 102 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or any conventional processor, etc. The processor 102 is the control center of the electronic device 100 and connects various parts of the entire electronic device 100 using various interfaces and lines.

[0033] The memory 101 in the electronic device 100 stores a plurality of instructions to implement a frequency regulation control method for a cogeneration unit under multi-heat source heating. The processor 102 can execute the plurality of instructions to implement: After the unit's target electric and thermal load instruction changes, the changed unit's target electric and thermal load is processed to obtain the most economical heating steam extraction port, and whether the steam extraction port needs to be switched is determined based on the current unit's steam extraction port; If there is no need to switch the steam extraction port, the difference between the steam network pressure feedback signal and the steam main set value is calculated, and the output signal is given to the original steam extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric heating load instruction; If the steam extraction port needs to be switched, the original steam extraction valve is closed, and the difference between the steam network pressure feedback signal and the steam main set value is calculated. After passing through the PID regulator, the output signal is given to the new steam extraction valve as the target electric and heating load instruction of the unit; The center door adjustment command and the rotating partition adjustment command are adjusted through the target electric load command.

[0034] Example 3: If the module / unit integrated in the electronic device 100 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory and read-only memory (ROM, Read-Only Memory).

[0035] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0036] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts 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, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0037] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0038] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A frequency modulation control method for a cogeneration unit under multi-heat source heating, characterized in that: The following steps are involved: After the unit's target electric and thermal load instruction changes, the changed unit's target electric and thermal load is processed to obtain the most economical heating steam extraction port, and whether the steam extraction port needs to be switched is determined based on the current unit's steam extraction port; If there is no need to switch the steam extraction port, the difference between the steam network pressure feedback signal and the steam main set value is calculated, and the output signal is given to the original steam extraction valve adjustment instruction after passing through the PID regulator, which serves as the unit's target electric heating load instruction; If the steam extraction port needs to be switched, the original steam extraction valve is closed, and the difference between the steam network pressure feedback signal and the steam main set value is calculated. After passing through the PID regulator, the output signal is given to the new steam extraction valve as the target electric and heating load instruction of the unit; The center door adjustment command and the rotating partition adjustment command are adjusted through the target electric load command.

2. The frequency modulation control method of a cogeneration unit under multi-heat source heating according to claim 1, characterized in that: The specific method of adjusting the control command of the central door through the target electric load command is as follows: The target electric load instruction is converted into a reheat hot end extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the reheat hot end extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the reheat hot end is supplying heat, it is sent to the central control door adjustment instruction.

3. The frequency modulation control method of a cogeneration unit under multi-heat source heating according to claim 1, characterized in that: The specific method of adjusting the rotary partition adjustment instruction through the target electric load instruction is as follows: The target electric load instruction is converted into a fifth-stage extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the fifth-stage extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the fifth stage is supplying heat, it is sent to the rotating partition adjustment instruction.

4. A frequency modulation control system for a cogeneration unit under multi-heat source heating, characterized in that: include: The switching judgment module is used to process the changed target electric and thermal load of the unit after the target electric and thermal load instruction of the unit changes, obtain the most economical heating steam extraction port, and determine whether the steam extraction port needs to be switched based on the current steam extraction port of the unit; The first regulating module is used to calculate the difference between the steam network pressure feedback signal and the steam main pipe set value when there is no need to switch the steam extraction port. After passing through the PID regulator, the output signal is given to the original steam extraction valve regulation instruction as the unit's target electric and heating load instruction; The second regulating module is used to close the original extraction valve when the steam extraction port needs to be switched, calculate the difference between the steam network pressure feedback signal and the steam main set value, and output a signal to the new extraction valve after passing through the PID regulator to provide an adjustment instruction as the unit's target electric and heating load instruction; The adjustment module is used to adjust the central door adjustment instruction and the rotating partition adjustment instruction through the target electric load instruction.

5. The frequency modulation control system of a cogeneration unit under multi-heat source heating according to claim 1, characterized in that: The functionality of the adjustment module is implemented through the following methods: The target electric load instruction is converted into a reheat hot end extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the reheat hot end extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the reheat hot end is supplying heat, it is sent to the central control door adjustment instruction.

6. The frequency regulation control system of a cogeneration unit under multi-heat source heating according to claim 1, characterized in that: The functionality of the adjustment module is implemented through the following methods: The target electric load instruction is converted into a fifth-stage extraction steam heating pressure feedforward signal. After the value is summed with the negative value of the fifth-stage extraction steam heating pressure and the heating extraction steam pressure set value, the signal is output through the PID regulator. After it is determined that the fifth stage is supplying heat, it is sent to the rotating partition adjustment instruction.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the frequency regulation control method of a cogeneration unit under multi-heat source heating according to any one of claims 1 to 3 are implemented.

8. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a frequency regulation control method for a cogeneration unit under multi-heat source heating according to any one of claims 1 to 3 are implemented.

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