Load management and operation control system for supercritical carbon dioxide coal-fired power generation unit

Abstract

The invention relates to the technical field of thermal power generation, and provides a supercritical carbon dioxide coal-fired generator set load management and operation control system which comprises an instruction forming and decomposing system, a control loop system and an execution mechanism system which are in communication connection with one another. Decomposing and coordinating to generate a main control instruction aiming at the boiler, the compressor and the turbine; wherein the turbine side power instruction is dynamically compensated based on the pressure deviation signal of the boiler side; the control loop system is used for distributing and converting the received main control instruction into a bottom layer control signal for driving the execution mechanism system; the execution mechanism system is used for responding to the bottom layer control signal and directly operating the unit so as to change the output power of the unit. The scheme is suitable for the supercritical carbon dioxide coal-fired power generation unit, and the deep peak regulation and rapid load changing capacity of the unit can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal power generation, in particular to a supercritical carbon dioxide coal-fired power unit load management and operation control system. BACKGROUND

[0002] Under the "double carbon" strategic goal, China is accelerating the construction of a new power system, and coal-fired power generation has become a "ballast" to ensure the safe and stable supply of China's electricity. Coal-fired units will be transformed and upgraded from traditional main power to supporting and regulating power, and their operation characteristics will mainly be deep peaking and rapid load variation. Supercritical carbon dioxide cycle power generation technology has the advantages of high cycle thermal efficiency, good load variation flexibility, compact system, and small land occupation, which can greatly reduce the carbon emissions of coal-fired units and enhance the flexibility of coal-fired power generation systems, and effectively promote the grid connection of new energy. Therefore, the operation control technology of "safe and efficient, flexible and low carbon" will become one of the key technologies for the large-scale application of supercritical carbon dioxide coal-fired power generation technology.

[0003] Due to the large difference in thermophysical properties between supercritical carbon dioxide and steam, the operation characteristics of the main equipment of supercritical carbon dioxide boiler, compressor, turbine, etc. have changed significantly compared to the main equipment of steam units. For example, the working fluid pressure of the supercritical carbon dioxide boiler decreases with the increase of thermal load, which requires significant changes in the coordination method of the boiler and turbine during load variation, as well as the main control of the boiler and the turbine. Therefore, it is necessary to build an operation control system suitable for supercritical carbon dioxide cycle coal-fired power units. SUMMARY

[0004] To solve the problems in the background art, the present application proposes a supercritical carbon dioxide coal-fired power unit load management and operation control system, which is suitable for supercritical carbon dioxide coal-fired power units and can improve the deep peaking and rapid load variation capability of the unit.

[0005] To achieve the above-mentioned purpose, the following solutions are adopted in the present application: The supercritical carbon dioxide coal-fired power unit load management and operation control system comprises an instruction forming and decomposing system, a control loop system and an actuator system which are communicatively connected. The instruction forming and decomposing system is used to receive external load instructions and decompose and coordinate them to generate main control instructions for the boiler, compressor and turbine. The power instruction on the turbine side is dynamically compensated based on the pressure deviation signal on the boiler side. The control loop system is used to distribute and convert the received main control instructions into bottom layer control signals to drive the actuator system. The actuator system is used to directly operate the unit in response to the bottom layer control signals to change the output power of the unit.

[0006] Optionally, the instruction forming and decomposing system comprises: a load management and control center, configured to receive the grid load instruction or the frequency modulation instruction and decompose the grid load instruction or the frequency modulation instruction into a pressure signal and a power instruction; a boiler load control module connected to the load management and control center and configured to receive the pressure signal; and a turbine load control module connected to the load management and control center and configured to receive the power instruction.

[0007] Optionally, the boiler load control module is configured to generate a pressure deviation signal according to the received pressure signal and a current main pressure of the unit, and to calculate and generate a boiler master control instruction and a first compressor master control instruction based on the pressure deviation signal; and the turbine load control module is configured to generate an initial power deviation signal according to the received power instruction and a current power generation of the unit, and to calculate and generate a turbine master control instruction and a second compressor master control instruction based on the initial power deviation signal and the pressure deviation signal on the boiler side.

[0008] Optionally, the boiler load control module is further configured to process the pressure deviation signal through a function module with a dead zone to generate a power deviation compensation signal, and to superimpose the power deviation compensation signal on the power deviation signal of the turbine load control module for compensation of the turbine master control instruction.

[0009] Optionally, the control loop system comprises a boiler master controller module, a compressor master controller module and a turbine master controller module; the boiler master controller module is connected to the boiler load control module and configured to receive the boiler master control instruction, generate fuel quantity and air quantity control instructions and send the fuel quantity and air quantity control instructions to an actuator system; the compressor master controller module is connected to the boiler load control module and the turbine load control module and configured to receive the first compressor master control instruction and the second compressor master control instruction simultaneously, generate rotating speed or frequency and bypass regulating valve opening degree and send the rotating speed or frequency and the bypass regulating valve opening degree to the actuator system; and the turbine master controller module is connected to the turbine load control module and configured to receive the turbine master control instruction, generate regulating valve opening degree, circulating water flow or valve opening degree and send the regulating valve opening degree, the circulating water flow or the valve opening degree to the actuator system.

[0010] Optionally, the boiler master controller module is connected to a plurality of subsystems, and the plurality of subsystems comprise a fuel quantity control system, an air quantity control system, a working medium temperature control system and a wall temperature control system. The fuel quantity control system is configured to generate a coal quantity instruction based on the boiler master control instruction; the air quantity control system is configured to generate an air quantity instruction based on the boiler master control instruction; the working medium temperature control system is configured to generate a coal quantity correction amount, an air quantity correction amount, a working medium flow correction amount, a flue gas recirculation amount correction amount and a flue gas damper opening degree instruction based on the boiler master control instruction; and the wall temperature control system is configured to generate a flue gas recirculation amount instruction based on the boiler master control instruction.

[0011] Optionally, the compressor main controller is connected to a working fluid flow control system and a working fluid pressure control system; the working fluid flow control system is used to generate compressor frequency or speed commands according to the compressor main control commands; the working fluid pressure control system is used to generate compressor speed correction and bypass regulating valve opening commands according to the compressor main control commands.

[0012] Optionally, the turbine main controller is connected to a power frequency regulation system and a cold end pressure control system. The power frequency regulation system is used to generate a main gas regulating valve opening command based on the turbine main control command. The cold end pressure control system is used to generate a circulating water flow command and a compressor speed correction amount based on the turbine main control command.

[0013] Optionally, the actuator system includes multiple devices controlled by the control loop system, including boiler-side devices, compressor-side devices, and turbine-side devices; the boiler-side devices include a coal mill and pulverizing system, a primary air fan, a forced draft fan, an induced draft fan, a flue gas recirculation fan, and a flue gas damper; the compressor-side devices include a compressor frequency converter, a storage tank, and a bypass regulating valve; the turbine-side devices include a main gas valve, a regulating valve, a DEH regulating system, a circulating cooling water system, a compressor, a pressure stabilizing tank, and valves.

[0014] Optionally, the system management and operation method includes the following steps: Step 1, the instruction generation and decomposition system receives power grid instructions and decomposes them into pressure signals and power instructions, and generates boiler main control instructions, turbine main control instructions and compressor main control instructions based on the pressure signals and power instructions respectively; Step 2, the control loop system distributes the main control instructions to each subsystem to generate control instructions for the actuator system; Step 3, the actuator system drives the corresponding equipment to operate in order to complete the load change process of the unit.

[0015] The beneficial effects of this invention are as follows: First, the system of this invention is divided into three levels: an instruction formation and decomposition system, a control loop system, and an actuator system. Each level is further divided into several modules, thus forming a complete control system. Moreover, this system intelligently decomposes the load or frequency regulation instructions from the power grid into independent master control instructions that drive the boiler, turbine, and compressor respectively, and further decomposes them into subsystem control instructions, coordinating and controlling the efficient operation of the three main units—the boiler, compressor, and turbine—thereby realizing load management and operation control of supercritical carbon dioxide coal-fired power generating units.

[0016] Moreover, this system uses power deviation compensation signals to provide real-time feedback of the boiler status to the turbine, allowing for early correction of turbine commands and significantly reducing interference between the two. The two systems work together through the compensation signals, ensuring long-term stable operation of the unit while reducing losses from frequent equipment adjustments and improving economic efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system of the present invention; Figure 2 This is a graph showing the dynamic characteristics of the boiler outlet working fluid parameters versus the main gas parameters after a step increase in the fuel quantity of a supercritical carbon dioxide coal-fired power generation unit in this invention embodiment. Figure 3 This is a graph showing the dynamic characteristics of the boiler outlet working fluid parameters with respect to reheat gas parameters after a step increase in the fuel quantity of a supercritical carbon dioxide coal-fired power generation unit in this embodiment of the invention. Figure 4 This is a graph showing the dynamic characteristics of the boiler outlet working fluid parameters relative to the main steam parameters after a step increase in the fuel quantity of a supercritical steam coal-fired power generation unit in this embodiment of the invention. Figure 5 This is a graph showing the dynamic characteristics of the boiler outlet working fluid parameters with respect to the primary reheat steam parameters after a step increase in the fuel quantity of the supercritical steam coal-fired power generation unit in this embodiment of the invention. Figure 6 This is a graph showing the dynamic characteristics of the boiler outlet working fluid parameters with respect to the secondary reheat steam parameters after a step increase in the fuel quantity of a supercritical steam coal-fired power generation unit in an embodiment of the present invention. Detailed Implementation

[0018] To make the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are merely one implementation method and do not represent all embodiments.

[0019] Example 1 Combination Figure 1 This invention provides a load management and operation control system for a supercritical carbon dioxide coal-fired power generation unit, comprising an instruction generation and decomposition system, a control loop system, and an actuator system that are interconnected. The instruction generation and decomposition system receives external load instructions and decomposes and coordinates them to generate master control instructions for the boiler, compressor, and turbine. The power instructions for the turbine side are dynamically compensated based on the pressure deviation signal on the boiler side. The control loop system distributes and converts the received master control instructions into underlying control signals that drive the actuator system. The actuator system directly operates the unit in response to the underlying control signals to change the unit's output power.

[0020] This system is divided into three levels: the instruction formation and decomposition system, the control loop system, and the actuator system. Each level is further divided into several modules, thus forming a complete control system. Further, this system intelligently decomposes the load or frequency regulation instructions of the power grid into independent control instructions for driving the boiler, turbine, and compressor respectively. Moreover, particularly, through the dynamic compensation of the turbine side power instruction by the boiler side pressure, the dynamic decoupling and response between the boiler and the turbine are achieved.

[0021] Specifically, the instruction formation and decomposition system includes: a load management and control center, which is used to receive the power grid load instruction or frequency regulation instruction and decompose it into a pressure signal and a power instruction; a boiler load control module, connected to the load management and control center, which is used to receive the pressure signal; a turbine load control module, connected to the load management and control center, which is used to receive the power instruction. The load management and control center disassembles the abstract power grid instruction into two targeted sub-instructions, namely the pressure signal transmitted to the boiler side and the power instruction transmitted to the turbine side, to achieve the preliminary control logic.

[0022] Further, after receiving the pressure signal, the boiler load control module compares it with the main steam pressure of the current unit, and calculates and generates a boiler main control instruction and a first compressor main control instruction. At the same time, the boiler load control module processes the pressure deviation signal through a function module with a dead zone to generate a power deviation compensation signal; the power deviation compensation signal is superimposed on the initial power deviation signal of the turbine load control module to compensate the turbine main control instruction.

[0023] Correspondingly, after receiving the power instruction, the turbine load control module compares it with the power generation of the current unit to generate an initial power deviation signal, forms a coordinated power deviation signal based on the initial power deviation signal and the pressure deviation signal on the boiler side, and then calculates and generates a turbine main control instruction and a second compressor main control instruction.

[0024] In traditional independent control, the boiler pressure fluctuation will directly cause the turbine power deviation, and the turbine power adjustment may also inversely affect the boiler pressure. Through the power deviation compensation signal, this system enables the boiler side state to be fed back to the turbine in real time, pre-corrects the turbine instruction, greatly reduces the interference between the two, and the two form a linkage through the compensation signal, ensuring the long-term stable operation of the unit, reducing the loss of frequent equipment adjustment, and improving the economy. The function module with a dead zone is a control module for suppressing minute parameter fluctuations and ensuring the stable operation of the system. It should be noted that the dynamic characteristics of the working medium pressure at the outlet of the supercritical carbon dioxide boiler in this embodiment are completely different from those of the traditional supercritical steam boiler. As Figures 2-3 shown, as the fuel quantity (heat load) increases, the main steam pressure and the reheater steam pressure at the outlet of the supercritical carbon dioxide boiler show a downward trend, whileFigures 4-6 As shown, with the increase of fuel quantity, the pressures of the main steam, primary reheat steam, and secondary reheat steam at the outlet of a traditional supercritical steam boiler exhibit an increasing trend. These opposing dynamic characteristics are closely related to the thermophysical properties of carbon dioxide and water. Therefore, when the unit load increases or decreases, the turbine power deviations caused by pressure fluctuations in the carbon dioxide boiler and the steam boiler are completely different. The mechanism by which the boiler pressure deviation signal generates the turbine power deviation compensation signal in this invention is fundamentally different from traditional coordinated control techniques.

[0025] Specifically, the control loop system includes a boiler main controller module, a compressor main controller module, and a turbine main controller module. The boiler main controller module is connected to the boiler load control module and is used to receive the boiler main control commands, generate fuel quantity and air volume control commands, and send them to the actuator system. The compressor main controller module is connected to the boiler load control module and the turbine load control module and is used to simultaneously receive the first compressor main control command and the second compressor main control command, generate speed or frequency and bypass regulating valve opening, and send them to the actuator system. The turbine main controller module is connected to the turbine load control module and is used to receive the turbine main control commands, generate regulating valve opening, circulating water flow rate, or valve opening, and send them to the actuator system.

[0026] The control loop system mainly transforms the main control commands output by the upstream load control module into specific operation commands for the actuators through the division of labor and cooperation of three main controller modules, thereby achieving precise control of the core equipment of the boiler, compressor, and turbine.

[0027] Furthermore, after receiving the boiler main control command from the previous level, the boiler main controller module sends it to the fuel quantity control system, air volume control system, working fluid temperature control system, and wall temperature control system, respectively. The operation of each system is as follows: the fuel quantity control system generates a coal quantity command in real time based on the main control command and comprehensively considers the current load and load increase rate, working fluid flow rate, air volume, boiler outlet working fluid temperature, and air-cooled wall outlet working fluid temperature, etc.; the air volume control system generates an air volume command in real time based on the main control command and comprehensively considers the current load and load increase rate, coal quantity, furnace negative pressure, and flue gas oxygen content, etc.; the working fluid temperature control system generates coal quantity correction, air volume correction, working fluid flow rate correction, flue gas recirculation correction, and flue gas damper opening command in real time based on the main control command and comprehensively considers the current load and load increase rate, fuel quantity, working fluid flow rate, air volume, and air-cooled wall outlet working fluid temperature, etc.; and the wall temperature control system generates a flue gas recirculation command in real time based on the main control command and comprehensively considers the current load and load increase rate, fuel quantity, working fluid flow rate, air volume, and air-cooled wall outlet working fluid temperature, etc.

[0028] After receiving the compressor master control command from the previous level, the compressor master controller sends it to the working fluid flow control system and the working fluid pressure control system. The working fluid flow control system generates compressor frequency or speed commands in real time based on the master control command and considering the current load, load increase rate, compressor inlet pressure, and temperature. The working fluid pressure control system generates compressor speed correction and bypass regulating valve opening commands in real time based on the master control command and considering the current load, load increase rate, compressor inlet pressure, and temperature.

[0029] After receiving the turbine master control command from the previous level, the turbine master controller sends it to the power frequency regulation system and the cold end pressure control system, respectively. The power frequency regulation system, based on the master control command and considering factors such as the primary frequency regulation command, current load and load increase rate, current valve position and valve flow characteristics, and exhaust pressure, generates a real-time main gas regulating valve opening command. The cold end pressure control system, based on the master control command and considering factors such as the precooler inlet circulating water temperature, current load and load increase rate, and compressor inlet temperature, generates a real-time circulating water flow command and compressor speed correction.

[0030] The master control commands from the upper-level load control module can be translated into specific executable commands such as fuel quantity and valve opening degree through the three main controller modules, avoiding execution deviations caused by ambiguous commands. Moreover, the compressor main controller module can simultaneously receive commands from the boiler and turbine, resolving the conflict between the two in traditional independent control by coordinating the gas demand on both sides.

[0031] Specifically, the actuator system includes multiple devices controlled by the control loop system, including boiler-side devices, compressor-side devices, and turbine-side devices; the boiler-side devices include a coal mill and pulverizing system, a primary air fan, a forced draft fan, an induced draft fan, a flue gas recirculation fan, and a flue gas damper; the compressor-side devices include a compressor frequency converter, a storage tank, and a bypass regulating valve; the turbine-side devices include a main gas valve, a regulating valve, a DEH regulating system, a circulating cooling water system, a compressor, a pressure stabilizing tank, and valves. Among them, the coal mill and pulverizing system adjust the amount of coal fed into the furnace in real time according to the coal quantity command; the flue gas recirculation fan adjusts the inlet guide vane or fan speed in real time according to the flue gas recirculation volume command; the flue gas damper adjusts the damper opening in real time according to the damper opening command; the DEH regulating system controls the opening of the oil motor regulating valve in real time according to the main gas regulating valve opening command; and the circulating water pump and valve adjust the pump speed or valve opening in real time according to the circulating water flow command.

[0032] Through the instruction transmission and equipment actions between the above three-level systems, load management and operation control of supercritical carbon dioxide coal-fired power generating units are realized.

[0033] Example 2 This embodiment provides a method for managing and operating a load management and operation control system for a supercritical carbon dioxide coal-fired power generation unit, including the following steps: Step 1: The instruction generation and decomposition system receives the power grid instruction and decomposes it into pressure signal and power instruction. Based on the pressure signal and power instruction, it generates boiler main control instruction, turbine main control instruction and compressor main control instruction respectively.

[0034] In the boiler load control module, the received pressure signal is compared with the measured main gas pressure of the unit to generate a pressure deviation signal. Based on the pressure deviation signal, the boiler main control command and the first compressor main control command are calculated and generated through a preset control algorithm. At the same time, the pressure deviation signal is input into a function module with a dead zone. When the pressure deviation signal exceeds the dead zone threshold, the function module outputs a power deviation compensation signal.

[0035] In the turbine load control module, the received power command is compared with the actual power generation of the unit to generate an initial power deviation signal. The power deviation compensation signal from the boiler side is received and superimposed on the initial power deviation signal to form a coordinated power deviation. Based on this coordinated power deviation, the turbine main control command and the second compressor main control command are calculated and generated by the control algorithm.

[0036] Step 2: The control loop system distributes the master control command to each subsystem, generating control commands for the actuator system. Specifically, after receiving the boiler master control command, the boiler master controller distributes it in parallel to the fuel quantity control system, air volume control system, working fluid temperature control system, and wall temperature control system. The compressor master controller simultaneously receives the first compressor master control command and the second compressor master control command, and according to preset weights or optimization logic, forms compressor control commands which are sent to the working fluid flow control system and the working fluid pressure control system. After receiving the turbine master control command, the turbine master controller distributes it to the power frequency regulation system and the cold end pressure control system.

[0037] Step 3: The actuator system receives the device-level instructions generated in Step 2 and drives the physical equipment to perform actions, ultimately completing the load change.

[0038] Through the continuous action of the above three steps, the supercritical carbon dioxide generator set can quickly, smoothly and safely increase the output power to the target value required by the power grid, thereby achieving efficient load management and operation control.

[0039] The specific embodiments of the present invention have been described in detail above with reference to the figures, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A load management and operation control system for a supercritical carbon dioxide coal-fired power generation unit, characterized in that: The system includes an interconnected instruction generation and decomposition system, a control loop system, and an actuator system. The instruction generation and decomposition system receives external load instructions and decomposes and coordinates them to generate master control instructions for the boiler, compressor, and turbine. Dynamic compensation is performed on the turbine-side power instructions based on the pressure deviation signal on the boiler side. The control loop system distributes and converts the received master control instructions into underlying control signals that drive the actuator system. The actuator system responds to the underlying control signals and directly operates the unit to change its output power.

2. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 1, characterized in that: The instruction formation and decomposition system includes: The load management and control center is used to receive power grid load commands or frequency regulation commands and decompose them into pressure signals and power commands. The boiler load control module is connected to the load management and control center and is used to receive the pressure signal; the turbine load control module is connected to the load management and control center and is used to receive the power command.

3. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 2, characterized in that: The boiler load control module is configured to: generate a pressure deviation signal based on the received pressure signal and the current main gas pressure of the unit; and calculate and generate boiler main control commands and first compressor main control commands based on the pressure deviation signal. The turbine load control module is configured to: generate an initial power deviation signal based on the received power command and the current power generation of the unit; and calculate and generate turbine main control command and second compressor main control command based on the initial power deviation signal and the pressure deviation signal on the boiler side.

4. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 3, characterized in that: The boiler load control module is further configured to: process the pressure deviation signal through a function module with a dead zone to generate a power deviation compensation signal; and superimpose the power deviation compensation signal onto the power deviation signal of the turbine load control module to compensate for the turbine main control command.

5. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 1, characterized in that: The control loop system includes a boiler main controller module, a compressor main controller module, and a turbine main controller module. The boiler main controller module is connected to the boiler load control module and is used to receive the boiler main control commands, generate fuel quantity and air volume control commands, and send them to the actuator system. The compressor main controller module is connected to the boiler load control module and the turbine load control module and is used to simultaneously receive the first compressor main control command and the second compressor main control command, generate speed or frequency and bypass regulating valve opening, and send them to the actuator system. The turbine main controller module is connected to the turbine load control module and is used to receive the turbine main control commands, generate regulating valve opening, circulating water flow rate, or valve opening, and send them to the actuator system.

6. The load management and operation control system for supercritical carbon dioxide coal-fired power generation units according to claim 5, characterized in that: The boiler main controller module is connected to multiple subsystems, including a fuel quantity control system, an air volume control system, a working fluid temperature control system, and a wall temperature control system. The fuel quantity control system is used to generate coal quantity instructions based on boiler main control instructions; The air volume control system is used to generate air volume commands based on boiler master control commands; the working fluid temperature control system is used to generate coal quantity correction, air volume correction, working fluid flow correction, flue gas recirculation quantity correction, and flue gas damper opening commands based on boiler master control commands; the wall temperature control system is used to generate flue gas recirculation quantity commands based on boiler master control commands.

7. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 5, characterized in that: The compressor main controller is connected to a working fluid flow control system and a working fluid pressure control system; the working fluid flow control system is used to generate compressor frequency or speed commands according to the compressor main control commands; the working fluid pressure control system is used to generate compressor speed correction and bypass regulating valve opening commands according to the compressor main control commands.

8. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 5, characterized in that: The turbine main controller is connected to a power frequency regulation system and a cold end pressure control system. The power frequency regulation system is used to generate a main gas regulating valve opening command based on the turbine main control command. The cold end pressure control system is used to generate a circulating water flow command and a compressor speed correction amount based on the turbine main control command.

9. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 1, characterized in that: The actuator system includes multiple devices controlled by the control loop system, including boiler-side devices, compressor-side devices, and turbine-side devices; the boiler-side devices include a coal mill and pulverizing system, a primary air fan, a forced draft fan, an induced draft fan, a flue gas recirculation fan, and a flue gas damper; the compressor-side devices include a compressor frequency converter, a storage tank, and a bypass regulating valve; the turbine-side devices include a main gas valve, a regulating valve, a DEH regulating system, a circulating cooling water system, a compressor, a pressure stabilizing tank, and valves.

10. The load management and operation control system for supercritical carbon dioxide coal-fired power generating units according to claim 1, characterized in that, The system management and operation method includes the following steps: Step 1: The instruction generation and decomposition system receives the power grid instruction and decomposes it into pressure signal and power instruction, and generates boiler main control instruction, turbine main control instruction and compressor main control instruction based on the pressure signal and power instruction respectively. Step 2: The control loop system distributes the master control command to each subsystem to generate control commands for the actuator system; Step 3: The actuator system drives the corresponding equipment to perform actions to complete the load change process of the unit.

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