Method and device for starting and stopping gas-steam combined cycle unit

Abstract

The invention relates to a method and device for starting and stopping a gas-steam combined cycle unit, and the method comprises the steps: obtaining a function demand, a sequence control instruction and unit operation parameters in a preset combined cycle unit starting and stopping process through analysis based on all data information of the combined cycle unit; dividing modules of the function groups, and designing internal control logic and state monitoring logic of each function group; after interface definition of each module and a cross-module communication and coordination mechanism are realized through a programming language and a technical framework, the interface definition and the cross-module communication and coordination mechanism are input into a preset simulation machine to be tested and optimized, an initial start-stop system is obtained and then deployed into a preset gas-steam combined cycle unit, field debugging and verification are carried out, and a final start-stop system is obtained. The purposes of achieving operation logicality in the start-stop process of the combined cycle unit, reducing the debugging fault probability and optimizing the debugging process of operators are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-steam combined cycle unit control, and in particular to a gas-steam combined cycle unit start-stop method and device. Background Art

[0002] With the rapid development of artificial intelligence, the intelligent control of gas-steam combined cycle units is now relatively advanced. However, the peak-shaving units in power plants are started and stopped frequently, with a large amount of operations and complex start and stop conditions. At the same time, it is also necessary to ensure the correctness and standardization of the start and stop process of the units. This is a major challenge for the operating personnel, whose staff is already very streamlined. Summary of the invention

[0003] The main purpose of the present invention is to provide a method and device for starting and stopping a gas-steam combined cycle unit, collect data on the unit design documents of a preset combined cycle machine, equipment operation history data, equipment operation conditions at each stage of start and stop, and manual operation records, and obtain the functional requirements, sequential control instructions and unit operation parameters of each subsystem and equipment during the start and stop process of the preset combined cycle machine through analysis; divide the preset start and stop system of the combined cycle machine into modules of functional groups according to the functional requirements; design the internal control logic and state monitoring logic design of each functional group based on the sequential control instructions and the unit operation parameters; based on the internal control logic and state monitoring logic design, implement the interface definition of each module and the communication and coordination mechanism across modules through programming language and technical framework, The interface definition includes input, output and internal communication protocol; after each functional module is implemented, it is input into a preset simulation machine for testing; according to the test results, according to the actual operation of the unit and the functional requirements of the start-stop system, the control parameters of each module are adjusted, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; the initial start-stop system is deployed to the preset gas-steam combined cycle unit, and on-site debugging and verification are carried out to obtain the final start-stop system, so as to realize the start-stop process of the gas-steam combined cycle unit, improve the configuration logic completeness of the unit, reduce the probability of failure during the debugging process, shorten the time for finding and handling problems when problems occur during the debugging process, improve the safety of the debugging process, and shorten the engineering progress of the entire infrastructure and debugging period.

[0004] To achieve the above object, the present invention provides a method for starting and stopping a gas-steam combined cycle unit, comprising the following steps: Collect data on the unit design documents, equipment operation history data, equipment operation conditions at each start-up and shutdown stage, and manual operation records of the preset combined cycle machine, and obtain the functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start-up and shutdown process of the preset combined cycle machine through analysis; According to the functional requirements, the preset start-stop system of the combined cycle machine is divided into modules of functional groups; based on the sequential control instructions and the unit operating parameters, the internal control logic and state monitoring logic design of each functional group are designed; Based on the internal control logic and status monitoring logic design, the interface definition of each module and the cross-module communication and coordination mechanism are implemented through programming language and technical framework, and the interface definition includes input, output and internal communication protocol; After each functional module is implemented, it is input into a preset simulation machine for testing; according to the test results, the control parameters of each module are adjusted according to the actual operation of the unit and the functional requirements of the start-stop system, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; The start-stop system is deployed in a preset gas-steam combined cycle unit, and on-site debugging and verification are carried out to obtain the final start-stop system.

[0005] Furthermore, various parameters of the units in the preset combined cycle machine are monitored in real time based on sensors, and the collected data is transmitted to the existing control system for analysis and judgment. According to the preset logic and parameters, corresponding control operations are performed on the units through the existing control system.

[0006] Furthermore, the module division of the functional group includes a main sequential control logic module, a thermal system control module, an auxiliary system control module, and a monitoring and alarm module; The execution order of each functional group is main sequence level control, functional group level control, functional sub-group level control, and equipment level control.

[0007] Furthermore, the interlocking and mutual exclusion relationships between the functional groups, the start and stop conditions of the functional groups, and the fault handling and recovery strategies are determined; For the analog parameters that need to be controlled, design the corresponding regulation loops and rules; for the switching devices, design the corresponding switching logic and interlocking relationship.

[0008] Furthermore, the test cases used in the testing process include normal startup test cases, fault recovery test cases, shutdown test cases, emergency shutdown test cases and equipment compatibility tests.

[0009] Furthermore, in practical applications, the start-stop system is interfaced with the existing system, and corresponding sequence control instructions and unit operation parameters are obtained according to various data generated during the start-stop process of the existing combined cycle machine; The corresponding sequential control instructions and unit operating parameters are input into the start-stop system to monitor and control the units of the existing combined cycle machine.

[0010] Furthermore, after the start-stop system is triggered, a collection instruction is issued to a preset sensor through the controller; The preset sensor collects data on the parameters and settings of each subsystem in the unit and the surrounding environment of the equipment; By using the collected data, it is confirmed that the current status of each subsystem and equipment of the unit meets the operation requirements of the start and stop of the existing combined cycle machine, then the control system is triggered to perform a pre-start check of the preset combined cycle machine; According to the sequential control instructions and the set values ​​of the unit operation, the environment of each subsystem and equipment is monitored by various sensors; When the state of the environmental monitoring meets the conditions for starting and stopping the existing combined cycle machine, the start-stop system is operated to gradually monitor and start each subsystem of the unit according to the process flow of the sequential control instructions and the unit operating parameters.

[0011] The present invention also provides a gas-steam combined cycle unit start-stop device, comprising: The data acquisition module collects data on the unit design documents, equipment operation history data, equipment operation conditions at each start and stop stage, and manual operation records of the preset combined cycle machine, and obtains the functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start and stop process of the preset combined cycle machine through analysis; A function planning module divides the preset start-stop system of the combined cycle machine into modules of functional groups according to the functional requirements; designs the internal control logic and state monitoring logic design of each functional group based on the sequential control instructions and the unit operation parameters; A programming implementation module, based on the internal control logic and status monitoring logic design, implements the interface definition of each module and the communication and coordination mechanism across modules through programming language and technical framework, wherein the interface definition includes input, output and internal communication protocols; The simulation environment test module inputs each functional module into a preset simulator for testing after the module is implemented; according to the test results, the control parameters of each module are adjusted according to the actual operation of the unit and the functional requirements of the start-stop system, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; The production environment adaptation module deploys the start-stop system to the preset gas-steam combined cycle unit, performs on-site debugging and verification, and obtains the final start-stop system.

[0012] The present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned gas-steam combined cycle unit start-stop method when executing the computer program.

[0013] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned gas-steam combined cycle unit start-up and shutdown method are implemented.

[0014] The gas-steam combined cycle unit start-up and shutdown method and device provided by the present invention have the following beneficial effects: The purpose of improving the configuration logic completeness of the unit during the start-up and shutdown process of the gas-steam combined cycle unit, reducing the probability of failure during the debugging process, shortening the time for finding and solving problems when problems arise during the debugging process, improving the safety of the debugging process, and shortening the engineering progress of the entire infrastructure and debugging period is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic flow chart of a method for starting and stopping a gas-steam combined cycle unit in one embodiment of the present invention; Figure 2 It is a structural block diagram of a start-stop device for a gas-steam combined cycle unit in one embodiment of the present invention; Figure 3 It is a schematic block diagram of the structure of a computer device according to an embodiment of the present invention.

[0016] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] Reference Figure 1 , which is a flow chart of a method for starting and stopping a gas-steam combined cycle unit proposed by the present invention, comprising the following steps: S1, collecting data on the unit design documents, equipment operation history data, equipment operation conditions at each start and stop stage, and manual operation records of the preset combined cycle machine, and obtaining functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start and stop process of the preset combined cycle machine through analysis; S2, dividing the preset start-stop system of the combined cycle machine into modules of functional groups according to the functional requirements; designing the internal control logic and state monitoring logic design of each functional group based on the sequential control instructions and the unit operation parameters; S3, based on the internal control logic and status monitoring logic design, implement the interface definition of each module and the cross-module communication and coordination mechanism through programming language and technical framework, wherein the interface definition includes input, output and internal communication protocol; S4, after each functional module is implemented, it is input into a preset simulation machine for testing; according to the test results, according to the actual operation of the unit and the functional requirements of the start-stop system, the control parameters of each module are adjusted to optimize the module performance of each module, and the initial start-stop system of the preset combined cycle machine is obtained; S5, deploying the start-stop system to a preset gas-steam combined cycle unit, performing on-site debugging and verification, and obtaining a final start-stop system.

[0019] For S1: Based on sensors, various parameters of the units in the preset combined cycle machine are monitored in real time, the collected data is transmitted to the existing control system for analysis and judgment, and according to the preset logic and parameters, corresponding control operations are performed on the units through the existing control system.

[0020] In the specific implementation process: Through comprehensive data collection and analysis of the unit design documents, equipment operation history data, equipment operation conditions at each stage of start-up and shutdown, and manual operation records of the preset combined cycle machine, the functional requirements, sequence control instructions and unit operation parameters of each subsystem and equipment during the start-up and shutdown process of the unit are accurately identified, ensuring that each step of the start-up and shutdown process is based on detailed data support, achieving accurate matching and efficient control of the unit's operating status, and improving the unit's operating efficiency and stability; Various sensors are installed in the gas-steam combined cycle unit. These sensors can detect various physical and chemical parameters of the unit in real time during operation, including but not limited to temperature, pressure, flow, vibration, speed, chemical composition concentration, etc., to capture subtle changes in the operation of the unit; the data collected by the sensors will be transmitted to the existing control system (distributed control system DCS, programmable logic controller PLC or other types of control systems), and the control system will process and analyze these data, such as filtering, calibration, trend analysis, etc., to extract useful information for judging the operating status of the unit; based on the analysis of the sensor data, the control system will set the control logic and parameters according to the preset control logic and parameters (these logic and parameters are based on the unit settings). The control system can make decisions based on the design documents, equipment operation history data, equipment operating conditions at each stage of start and stop, and manual operation records, etc., which include adjusting the fuel supply, regulating the steam flow, starting or stopping auxiliary equipment, etc., to ensure that the unit operates in a safe and efficient state; for example, if the sensor detects that the temperature of a part of the unit is too high, the control system may automatically reduce the fuel supply or increase the cooling water flow to lower the temperature to prevent equipment damage or failure. This step is an important manifestation of automated control and intelligent management in gas-steam combined cycle units, enabling the unit to respond more flexibly and quickly to changes in various operating conditions, thereby improving the unit's operating efficiency, safety and reliability and reducing the burden on personnel operations.

[0021] For S2: The module division of the functional group includes the main sequential control logic module, thermal system control module, auxiliary system control module, and monitoring and alarm module; The execution order of each functional group is main sequence level control, functional group level control, functional sub-group level control, and equipment level control.

[0022] Determine the interlocking and mutual exclusion relationships between functional groups, the start and stop conditions of functional groups, and the fault handling and recovery strategies; For the analog parameters that need to be controlled, design the corresponding regulation loops and rules; for the switching devices, design the corresponding switching logic and interlocking relationship.

[0023] In the specific implementation process: The module division of the functional group includes the main sequential control logic module, the thermal system control module, the auxiliary system control module, and the monitoring and alarm module; among them, the main sequential control logic module is used for the overall control and coordination of the entire start-stop system, including the start, pause, continue and cancel functions of the start and stop process; it communicates and exchanges data with other functional group modules to ensure the smooth progress of the start-stop process; the thermal system control module is used to control the thermal systems in the combined cycle machine, such as boilers, steam turbines, waste heat boilers, etc.; it adjusts the operating status of the thermal system according to the unit operating parameters and sequential control instructions; the auxiliary system control module is used to control auxiliary systems, such as the circulating water system, fuel system, flue gas treatment system, etc.; it ensures that the auxiliary systems operate correctly during the start-stop process and provides necessary support and guarantee for the thermal system; the monitoring and alarm module is used to monitor the unit operating parameters and equipment status in real time; when the parameters or status exceed the normal range, an alarm signal is issued and corresponding protective measures are taken.

[0024] The execution order of each functional group is main sequence control, functional group control, functional sub-group control, and equipment level control; among them, the main sequence control is used for the overall control of the entire start and stop process, including the start, pause, continue and cancel functions of the start and stop process; the functional group level control is used to control the start and stop of each functional group according to the instructions of the main sequence control logic module; the functional sub-group level control is used to further refine the control logic on the basis of the functional group level control to control the start and stop of each functional sub-group; the equipment level control is used to ultimately control the start, operation and stop of each device to ensure that the equipment operates in accordance with the predetermined order and logic.

[0025] The preset start-stop system of the combined cycle machine is divided into modules of functional groups according to functional requirements, and the internal control logic and status monitoring logic of each functional group are designed based on sequential control instructions and unit operating parameters. This modular design makes the start-stop system clearer and easier to manage and maintain. At the same time, the modular structure also facilitates flexible adjustment and optimization according to the actual operation of the unit and the functional requirements of the start-stop system, improving the adaptability and scalability of the system.

[0026] To design the internal control logic and status monitoring logic for each functional group, it is necessary to determine the interlocking and mutual exclusion relationships between the functional groups to ensure coordinated operation between the functional groups and avoid conflicts; determine the start and stop conditions of the functional groups based on sequential control instructions and unit parameters; define the processing steps for fault detection, alarm, isolation and recovery; for the analog parameters that need to be controlled, design a PID controller to adjust the parameters to the set values; design the switching logic to ensure the correct start / stop of the equipment and handle the interlocking relationship.

[0027] Among them, the processing steps for fault detection, alarm, isolation and recovery are as follows: Real-time monitoring uses sensors installed at key locations of the unit to monitor various operating parameters of the unit, such as temperature, pressure, flow, vibration, speed, etc., and compares the real-time monitored data with the preset normal range or threshold. When the monitored data exceeds the preset range or threshold, it is automatically identified as an abnormal situation. A comprehensive judgment is made based on historical data and the unit's operating status to confirm the type, location and severity of the fault. Trigger the alarm. Once the fault is confirmed, the system immediately triggers the alarm mechanism and sends the alarm information, including the fault type, location, severity and recommended initial treatment measures; the alarm signal is sent through multiple means such as sound, light and electricity to quickly and accurately notify the unit operating personnel and relevant management personnel of the alarm information. At the same time, the system automatically records the alarm information, including alarm time, fault type, location, treatment measures, etc. The alarm records are provided for subsequent analysis and query.

[0028] Isolation measures: After confirming the fault, take immediate measures to isolate the faulty equipment from the unit. According to the characteristics of the equipment, isolation measures include cutting off power, closing valves, stopping equipment operation, etc. When isolating the faulty equipment, it is necessary to ensure that other equipment is not affected or is minimally affected. At the same time, it is necessary to adjust the operating parameters of the unit or start the backup equipment to maintain the stable operation of other equipment in the unit. Before performing the isolation operation, the risks and possible impacts of the operation should be evaluated, and the safety of personnel and equipment should be ensured.

[0029] Equipment recovery: After isolating the faulty equipment, technical personnel will conduct troubleshooting and repair work. The troubleshooting work should include checking the operating status of the faulty equipment, analyzing the cause of the fault, determining the repair plan, etc. After the fault is repaired, the equipment is restored in accordance with the prescribed procedures. After the equipment is restored, the entire unit is verified and tested to ensure that the unit can operate stably and meet the design requirements.

[0030] For S3: The start-stop system is divided into multiple modules, each of which is responsible for a specific function or task. For example, the monitoring module is responsible for real-time acquisition and display of system status, the control module is responsible for sending control instructions according to preset logic, and the alarm module is responsible for triggering alarms when abnormalities are detected. Each module interacts with other modules through a well-defined interface, which specifies the data format, communication protocol, and calling method for communication between modules. For example, the control module needs to call the data of the monitoring module through a request in a specific format, while the alarm module needs to receive abnormal signals from the control module. Modules communicate with each other through message passing. The message passing methods include data values, data structures or objects. The message passing mechanism is based on synchronous (such as function calls) or asynchronous (such as event monitoring) methods. The coordination logic between modules is defined to achieve collaborative work between modules. The coordination logic includes but is not limited to state machines, event-driven models or workflow engines. Through the coordination logic, it can be ensured that the modules perform specific operations at the right time and in the right order.

[0031] Through modularization and interface definition, the system structure is optimized to reduce unnecessary redundancy and complexity; clear interface definition and coordination logic reduce failures caused by poor information or improper coordination. When a problem occurs in a module, other modules can quickly perceive it and take corresponding countermeasures, thereby reducing the impact of the failure on the entire system; with the support of the technical framework, the system's distributed deployment and load balancing are achieved, improving the system's fault tolerance and stability.

[0032] For S4: First, according to the functional requirements of the start-stop system, the implementation of each functional module is unit tested. After each functional module is implemented, it is integrated and transmitted to a preset simulator for integration testing. The preset simulator simulates the operating environment of the actual unit and simulates various operating conditions and abnormal conditions in order to comprehensively test the functional modules. Through the simulator test, feedback on the performance of each module and the coordination between the modules is obtained. These feedbacks include data on response time, accuracy, stability, etc. According to the test results and the actual operation of the unit, the control parameters of each module are adjusted. These parameters include control logic, threshold setting, response time, etc., to ensure that the module can achieve the best performance in actual applications. In addition to adjusting the control parameters, the module code needs to be optimized to improve its execution efficiency and stability, including optimizing algorithms, reducing resource consumption, and improving code readability. After multiple iterations and adjustments, when all functional modules meet the expected performance standards, the functional modules are integrated to form a complete start-stop system, which is the initial start-stop system and can be deployed and operated on the actual unit. Each functional module is input into the preset simulator for testing, and the control parameters of each module are adjusted and optimized based on the test results. This step can discover and solve potential problems in advance, ensuring that the start-stop system has been fully verified and optimized before being deployed to the actual unit, thereby improving the reliability and safety of the system.

[0033] During the testing process, in order to ensure the comprehensiveness and robustness of the system, a variety of test cases are used for testing, including: normal startup test cases, testing the process of the system from a completely stopped state to a normal startup; fault recovery test cases, testing the system's ability to recover after a fault. Shutdown test cases, testing the process of the system from a running state to a safe shutdown. Emergency shutdown test cases, testing the system's ability to shut down quickly in an emergency. Equipment compatibility testing, testing the compatibility of the system with other equipment or systems to ensure that they can work seamlessly. Through these test cases, the performance and stability of the system are fully understood, and necessary adjustments and optimizations are made based on the test results to obtain a fully tested and verified start-stop system, providing a strong guarantee for the stable operation of the actual unit.

[0034] For S5: Deploy the initial start-stop system to the gas-steam combined cycle unit, and deploy the software system (such as control logic, monitoring interface, etc.); after the installation is completed, integrate the initial start-stop system with other parts of the unit, including interface docking with the existing control system, setting of data communication protocol, etc., to ensure that the initial start-stop system can be seamlessly integrated into the overall operating environment of the unit; after the initial start-stop system is deployed, perform preliminary debugging, including checking whether the system is installed correctly, whether the communication between modules is smooth, and whether the control logic is accurate; based on the preliminary debugging, verify the various functions of the initial start-stop system, including normal startup, shutdown, fault recovery, etc. Test to ensure that the system can work as expected in actual operation; in addition to functional verification, the performance of the initial start-stop system needs to be evaluated, including tests on response time, stability, accuracy, etc., to evaluate whether the system's performance in actual operation meets the requirements; based on the results of debugging and verification, the initial start-stop system is further optimized, including adjusting control parameters, optimizing algorithms, improving the user interface, etc., to improve the system's performance and user experience; through on-site debugging and verification, ensure that the initial start-stop system can adapt to various conditions in the actual operating environment, including but not limited to operation tests under different loads and different working conditions, to ensure that the system can work stably under various conditions. Finally, after optimization, the final start-stop system is obtained.

[0035] Reference Figure 2 , is a structural block diagram of a gas-steam combined cycle unit start-stop device in one embodiment of the present invention, comprising: The data acquisition module collects data on the unit design documents, equipment operation history data, equipment operation conditions at each start and stop stage, and manual operation records of the preset combined cycle machine, and obtains the functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start and stop process of the preset combined cycle machine through analysis; A function planning module divides the preset start-stop system of the combined cycle machine into modules of functional groups according to the functional requirements; designs the internal control logic and state monitoring logic design of each functional group based on the sequential control instructions and the unit operation parameters; A programming implementation module, based on the internal control logic and status monitoring logic design, implements the interface definition of each module and the communication and coordination mechanism across modules through programming language and technical framework, wherein the interface definition includes input, output and internal communication protocols; The simulation environment test module inputs each functional module into a preset simulator for testing after the module is implemented; according to the test results, the control parameters of each module are adjusted according to the actual operation of the unit and the functional requirements of the start-stop system, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; The production environment adaptation module deploys the start-stop system to the preset gas-steam combined cycle unit, performs on-site debugging and verification, and obtains the final start-stop system.

[0036] Reference Figure 3 In an embodiment of the present invention, a computer device is also provided. The computer device may be a server, and its internal structure may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, a display screen, an input device, a network interface and a database connected through a system bus. Among them, the processor designed by the computer is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the corresponding data in this embodiment. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the above method is implemented.

[0037] Those skilled in the art will understand that Figure 3 The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present invention, and does not constitute a limitation on the computer device to which the solution of the present invention is applied.

[0038] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above method is implemented. It can be understood that the computer-readable storage medium in this embodiment can be a volatile readable storage medium or a non-volatile readable storage medium.

[0039] In summary, data collection is performed on the unit design documents, equipment operation history data, equipment operation conditions at each start-up and shutdown stage, and manual operation records of the preset combined cycle machine, and the functional requirements, sequential control instructions, and unit operation parameters of each subsystem and equipment during the start-up and shutdown process of the preset combined cycle machine are obtained through analysis; according to the functional requirements, the preset start-up and shutdown system of the combined cycle machine is divided into modules of functional groups; based on the sequential control instructions and the unit operation parameters, the internal control logic and state monitoring logic design of each functional group are designed; based on the internal control logic and state monitoring logic design, the interface definition of each module and the cross-module communication and coordination mechanism are implemented through programming languages ​​and technical frameworks, and the interface definition includes input, output, and internal communication protocols; After each functional module is implemented, it is input into the preset simulation machine for testing; according to the test results, according to the actual operation of the unit and the functional requirements of the start-stop system, the control parameters of each module are adjusted, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; the initial start-stop system is deployed to the control system of the preset gas-steam combined cycle unit, and on-site debugging and verification are carried out to obtain the final start-stop system, so as to achieve the start-stop process of the gas-steam combined cycle unit, improve the configuration logic completeness of the unit, reduce the probability of failure during the debugging process, shorten the time for finding and handling problems when problems occur during the debugging process, improve the safety of the debugging process, and shorten the engineering progress of the entire infrastructure and debugging period.

[0040] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided by the present invention and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double-speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM.

[0041] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for starting and stopping a gas-steam combined cycle unit, characterized in that: The following steps are involved: Collect data on the unit design documents, equipment operation history data, equipment operation conditions at each start-up and shutdown stage, and manual operation records of the preset combined cycle machine, and obtain the functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start-up and shutdown process of the preset combined cycle machine through analysis; According to the functional requirements, the preset start-stop system of the combined cycle machine is divided into modules of functional groups; based on the sequential control instructions and the unit operating parameters, the internal control logic and state monitoring logic design of each functional group are designed; Based on the internal control logic and status monitoring logic design, the interface definition of each module and the cross-module communication and coordination mechanism are implemented through programming language and technical framework, and the interface definition includes input, output and internal communication protocol; After each functional module is implemented, it is input into the preset simulation machine for testing; According to the test results, according to the actual operation of the unit and the functional requirements of the start-stop system, the control parameters of each module are adjusted to optimize the module performance of each module, and the initial start-stop system of the preset combined cycle machine is obtained; The initial start-stop system is deployed to the control system of a preset gas-steam combined cycle unit, and on-site debugging and verification are performed to obtain the final start-stop system.

2. The method for starting and stopping a gas-steam combined cycle unit according to claim 1, characterized in that: Based on sensors, various parameters of the units in the preset combined cycle machine are monitored in real time, the collected data is transmitted to the existing control system for analysis and judgment, and according to the preset logic and parameters, corresponding control operations are performed on the units through the existing control system.

3. The method for starting and stopping a gas-steam combined cycle unit according to claim 1, wherein the preset start and stop system of the combined cycle unit is divided into modules of functional groups according to the functional requirements, characterized in that: The module division of the functional group includes the main sequential control logic module, thermal system control module, auxiliary system control module, and monitoring and alarm module; The execution order of each functional group is main sequence level control, functional group level control, functional sub-group level control, and equipment level control.

4. The method for starting and stopping a gas-steam combined cycle unit according to claim 1, wherein the internal control logic and state monitoring logic are designed for each functional group based on the sequential control instructions and the unit operation parameters, and is characterized in that: Determine the interlocking and mutual exclusion relationships between functional groups, the start and stop conditions of functional groups, and the fault handling and recovery strategies; For the analog parameters that need to be controlled, design the corresponding regulation loops and rules; for the switching devices, design the corresponding switching logic and interlocking relationship.

5. The method for starting and stopping a gas-steam combined cycle unit according to claim 1 is input into a preset simulation machine for testing after each functional module is implemented, and is characterized in that: The test cases used in the testing process include normal startup test cases, fault recovery test cases, shutdown test cases, emergency shutdown test cases and equipment compatibility tests.

6. The method for starting and stopping a gas-steam combined cycle unit according to claim 1, characterized in that: In practical applications, the start-stop system is interfaced with the existing system, and corresponding sequence control instructions and unit operation parameters are obtained according to various data generated during the start-stop process of the existing combined cycle machine; The corresponding sequential control instructions and unit operating parameters are input into the start-stop system to monitor and control the units of the existing combined cycle machine.

7. The method for starting and stopping a gas-steam combined cycle unit according to claim 6, characterized in that: After the start-stop system is triggered, the controller issues a collection instruction to the preset sensor; The preset sensor collects data on the parameters and settings of each subsystem in the unit and the surrounding environment of the equipment; By using the collected data, it is confirmed that the current status of each subsystem and equipment of the unit meets the operation requirements of the start and stop of the existing combined cycle machine, then the control system is triggered to perform a pre-start check of the preset combined cycle machine; According to the sequential control instructions and the set values ​​of the unit operation, the environment of each subsystem and equipment is monitored by various sensors; When the state of the environmental monitoring meets the conditions for starting and stopping the existing combined cycle machine, the start-stop system is operated to gradually monitor and start each subsystem of the unit according to the process flow of the sequential control instructions and the unit operating parameters.

8. A gas-steam combined cycle unit start-stop device, characterized in that: include: The data acquisition module collects data on the unit design documents, equipment operation history data, equipment operation conditions at each start and stop stage, and manual operation records of the preset combined cycle machine, and obtains the functional requirements, sequence control instructions, and unit operation parameters of each subsystem and equipment during the start and stop process of the preset combined cycle machine through analysis; A function planning module divides the preset start-stop system of the combined cycle machine into modules of functional groups according to the functional requirements; designs the internal control logic and state monitoring logic design of each functional group based on the sequential control instructions and the unit operation parameters; A programming implementation module, based on the internal control logic and status monitoring logic design, implements the interface definition of each module and the communication and coordination mechanism across modules through programming language and technical framework, wherein the interface definition includes input, output and internal communication protocols; The simulation environment test module inputs each functional module into a preset simulator for testing after the module is implemented; according to the test results, the control parameters of each module are adjusted according to the actual operation of the unit and the functional requirements of the start-stop system, the module performance of each module is optimized, and the initial start-stop system of the preset combined cycle machine is obtained; The production environment adaptation module deploys the start-stop system to the preset gas-steam combined cycle unit, performs on-site debugging and verification, and obtains the final start-stop system.

9. A computer device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the computer program, the steps of the method for starting and stopping a gas-steam combined cycle unit described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for starting and stopping a gas-steam combined cycle unit according to any one of claims 1 to 7 are implemented.

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