CN110825050A - Automatic start-stop control system and control method for F-grade gas-steam combined cycle system - Google Patents
Automatic start-stop control system and control method for F-grade gas-steam combined cycle system Download PDFInfo
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- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
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- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention discloses an automatic start-stop control system of an F-grade gas-steam combined cycle system and a control method thereof, wherein the system comprises a monitoring background and a plurality of control cabinets; the monitoring background monitors the operation of each combined circulation system through each control cabinet; each control cabinet comprises a power supply, a process control module, an input/output interface module and a communication module; the process control module acquires the operation parameter information of the controlled combined cycle system through the input and output interface module; the process control module comprises a system control unit and a plurality of single equipment control units; and the system control unit controls the start or stop of each device in the corresponding subsystem through each single device control unit according to the operation parameter information of the controlled combined cycle system so as to control the automatic start or stop of a plurality of subsystems in the controlled combined cycle system in sequence. The invention can reduce the labor intensity of operators, improve the consistency of the system starting and stopping process, reduce manual misoperation, reduce the starting and stopping time and improve the running safety of the unit.
Description
Technical Field
The invention relates to the technical field of automatic control of electromechanical equipment, in particular to an automatic start-stop control system and a control method for an F-level gas-steam combined cycle system.
Background
The F-grade gas-steam combined cycle system is an advanced energy system at present, has higher combustion chamber temperature and higher single-machine power, has the advantages of relatively simple process flow, moderate system output, less pollutant discharge, higher variable load rate and the like compared with the conventional coal-fired thermal power generating unit, and has higher thermal efficiency due to the realization of the cascade utilization of energy. Under the large environment with increased environmental pressure and high power grid peak regulation requirement, the superiority is well reflected, so that the rapid development is achieved.
For the control of the F-cascade combined circulation system, a decentralized control system is adopted at home and abroad at present, and the self-starting and stopping control is considered in the design stage, but the situation that the self-starting and stopping control system cannot be successfully put into operation generally exists due to objective reasons such as short construction period and the like. The combined cycle system mainly depends on manual operation, the start-stop stage operation is frequent, the levels of different operators are different, the treatment experience of abnormal conditions is different, the potential safety hazard exists, the start-stop time can be prolonged once misoperation occurs, the start-stop energy consumption is increased, and the equipment and facilities can be seriously damaged. For a part of the units using the automatic start-stop control system at present, because a three-level structure of a coordination level, a subgroup level and a device level is usually adopted in the design, the program is complex, the fault is easy to occur, common operators are not easy to deeply master, the automatic program is usually stopped after the fault occurs and manual operation is adopted, and the labor intensity of the operators is high.
Disclosure of Invention
The invention aims to provide an automatic start-stop control system and a control method of an F-level gas-steam combined circulation system, which are suitable for the working condition that the F-level combined circulation system is frequently started and stopped, have simple structure and high availability, can reduce the labor intensity of operators, reduce the start-stop time and the start-stop energy consumption and improve the running safety of a unit.
The technical scheme adopted by the invention is as follows: an automatic start-stop control system of an F-level gas-steam combined cycle system comprises a monitoring background and a plurality of control cabinets corresponding to different controlled F-level gas-steam combined cycle systems; the monitoring background controls the operation of each corresponding F-level gas-steam combined circulation system through each control cabinet and acquires the operation information of the corresponding F-level gas-steam combined circulation system;
each control cabinet comprises a power supply, a process control module, an input/output interface module and a communication module; the process control module is connected and communicated with the monitoring background through the communication module; the input/output interface module comprises an input module and an output module; the process control module acquires the operation parameter information of the controlled combined cycle system through the input module and outputs a control instruction to the controlled combined cycle system through the output module;
the process control module adopts a double-layer control unit structure and comprises a system control unit and a plurality of single equipment control units; and the system control unit controls the start or stop of each device in the corresponding subsystem through each single device control unit according to the operation parameter information of the controlled combined cycle system so as to control the start or stop of a plurality of subsystems in the controlled combined cycle system.
When the control system is applied, each control cabinet is respectively and correspondingly used for controlling one controlled F-level gas-steam combined circulation system, so that the controlled F-level gas-steam combined circulation system can be automatically started and stopped. When the F-level gas and steam combined cycle system is controlled, a double-layer control strategy is implemented, the system control unit executes system layer control, the single equipment control unit executes single equipment layer control, the system layer control can realize sequential starting of all subsystems of a certain specific process of the combined cycle system, the single equipment layer control can complete control of all single equipment in corresponding subsystems, the double-layer control mode can support combination of a system start-stop serial step sequence and a parallel step sequence, start-stop waiting time is reduced, and start-stop control efficiency is improved. The control logic of the system control unit related to the process sequence and the control logic of the single equipment control unit to each single equipment can refer to the existing manual start-stop control logic.
Preferably, in each control cabinet, the power supply includes at least two redundantly-arranged power supply modules and a redundancy switching module, and the redundancy switching module controls one of the power supply modules to supply operating power to other devices in the control cabinet according to the operating state of each power supply module. The redundant configuration and redundant switching of the power supply can be implemented by the prior art.
Preferably, in each control cabinet, the process control module includes a main control module and a standby control module, which are mutually standby, and communicate with each other and are respectively connected and communicated with the power supply, the input/output interface module and the communication module. When the device is applied, the switching between the main control module and the standby control module can be manually realized by field personnel as required, or the states of the main control module and the standby control module are mutually monitored in real time to realize that the main control module and the standby control module are mutually standby, and when the process control module which executes the process control at present generates a device fault, the device can be switched to another process control module, so that the control reliability is improved.
Preferably, in each control cabinet, the process control module, the power supply, the input/output interface module and the communication module are respectively connected and communicated through a power supply and a data bus.
Preferably, a plurality of control cabinets are in connection communication with the monitoring backend through the network switch.
Preferably, the controlled combined cycle system is connected with the network switch through the communication manager, and further connected and communicated with the monitoring background. Other control devices or intelligent equipment are generally arranged in the F-level gas-steam combined cycle system, and the equipment is connected and communicated with the monitoring background to be used for communicating other information, so that the expansion of the control function of the invention or other equipment in the F-level gas-steam combined cycle system is facilitated.
In the invention, the combined cycle system is a single-shaft F-grade gas turbine combined cycle system or a double-shaft F-grade gas turbine combined cycle system. The invention has versatility for both combined cycle systems.
The invention also discloses an automatic start-stop control method of the F-grade gas-steam combined cycle system, wherein the F-grade gas-steam combined cycle system comprises an F-grade gas turbine and an auxiliary subsystem thereof, a waste heat boiler and an auxiliary subsystem thereof, a steam turbine and an auxiliary subsystem thereof, peripheral equipment and a public subsystem; the system start-stop control method comprises the following steps:
the system control unit determines the starting or stopping sequence of each subsystem according to the process flow data obtained by pre-analysis;
the system control unit respectively sends starting or stopping instruction signals to each single equipment control unit according to the starting or stopping sequence;
each single equipment control unit receives the starting or stopping control signal and controls the starting or stopping of each single equipment in the corresponding subsystem;
in the process of starting and stopping control, each single equipment control unit acquires the running state data of each single equipment in the corresponding subsystem, transmits the running state data to the system control unit, and controls the equipment according to the acquired running state data; and the system control unit identifies the system state according to the received running state data of the single equipment and adjusts the control parameters in the starting or stopping instruction signals sent to the single equipment control unit according to the state identification result.
The system state comprises a cold state, a steady state, a hot state, an extreme hot state and the like, the control parameters comprise time constants of open-loop control, parameters of closed-loop control regulators and the like, the traditional control method can be referred to according to different strategies of changing the control parameters of the system state, and the invention aims to realize automatic start-stop control of the combined cycle system through a double-layer control result.
The acquired running state data comprise original signals sent by field primary elements of all subsystems, and the single equipment control unit is used for representing and judging whether the state running of the corresponding subsystem is accurate or not according to the data. The accurate judgment of the representation signals can ensure the unified pace of each level of control functions. The original signals sent by the field primary elements of each subsystem mainly comprise the pressure, the temperature, the current of the engine-turning equipment, the starting and stopping signals of the equipment, the opening and closing signals of a valve and the like of the system.
Further, the control modes of the single equipment control unit comprise a conventional control mode for actual control and a simulation control mode for off-line simulation;
under the simulation control mode, the single equipment control unit receives a starting or stopping instruction signal of the system control unit, obtains a simulation equipment running state signal by using a preset equipment control model corresponding to the controlled single equipment, and feeds the simulation equipment running state signal back to the system control unit.
The equipment control model corresponds to the controlled single equipment of the single equipment control unit, and can be designed according to the control strategy of the single equipment control unit and the working characteristics of the corresponding single equipment and referring to equipment running state data which can be obtained by different control instructions in the actual control process. The method can be used for simulating the control feedback of each process subsystem at the single equipment control layer, and realizes the off-line verification of the automatic start-stop control system, thereby ensuring the reliability of the automatic start-stop control system of the combined cycle system before the combined cycle system is put into use.
Further, in the present invention, when controlling the start of the controlled combined cycle system, the start control sequence of the subsystems is: the auxiliary system starts AS control and waste heat boiler water supply HW control, the gas turbine and the gas compressor are started to be connected to the grid GS, the waste heat boiler is started to carry load HL, the steam turbine starts SS control, the steam turbine is connected to the grid and load is increased to enter an automatic power generation control mode UL.
When the controlled combined cycle system is controlled to stop, the stop control sequence of the subsystems is as follows: the combined cycle system exits the automatic power generation control mode UD, the gas turbine system is de-loaded to a minimum output GD, the steam turbine system is shut down ST, the gas turbine system is shut down GT, the waste heat boiler system is shut down HT, and the auxiliary system is shut down until the combined cycle system is wholly shut down AT.
The start-stop process control of the combined cycle system adopts a mode of combining a serial step sequence and a parallel step sequence, and can accelerate the start-stop speed. Serial pacing, i.e. the control steps of a single plant that must be executed serially, is limited by the process flow and must be controlled in sequence, for example: the water supply control HW of the waste heat boiler system must be completed before the start control GS of the combustion engine system, and the parallel step sequence is a single equipment control step sequence which can be executed simultaneously, and such equipment has no necessary process flow limitation and can work in parallel to save the start/stop time of the unit, such as: the auxiliary system start control AS and the waste heat boiler system water supply control HW can be executed in parallel according to specific requirements.
Advantageous effects
When the control system of the invention controls a single combined cycle system, an upper layer and a lower layer of control structures are adopted, thus forming a self-starting and stopping control system with simple structure and high usability, reducing the labor intensity of operators, improving the consistency of the starting and stopping processes of the execution systems of all control cabinets by solidifying the optimal operation program, reducing the difference of the operation of different operators, reducing the manual misoperation, reducing the starting and stopping time, improving the running safety of the unit and reducing the energy consumption of starting and stopping.
Meanwhile, the system start-stop control of the invention does not adopt the traditional method, carries out complicated design layering according to a unit level, a function group level, a function subgroup level, an equipment control level, an interface module and the like, but implements a simple and effective double-layer control structure and control strategy, namely designs a system control unit layer for executing system level control and a single equipment control unit layer for executing single equipment level control. The system layer control realizes the sequential start of all subsystems of a certain specific process of the combined cycle system, the single equipment layer control can complete the control of each single equipment in the corresponding subsystem, and the mode of double-layer control supports the combination of the serial step sequence and the parallel step sequence of the start and stop of the system, so that the combined cycle system has higher control efficiency.
Drawings
FIG. 1 is a schematic structural diagram of an automatic start-stop control system of a class F gas-steam combined cycle system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a gas-steam combined cycle system of class F of a controlled object;
FIG. 3 is a block diagram illustrating an automatic start control process of the control method of the combined F-stage gas and steam cycle system according to the present invention;
FIG. 4 is a block diagram illustrating the automatic shutdown control process of the control method of the F-class combined gas and steam cycle system of the present invention.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and the specific embodiments.
Example 1
The present embodiment is an automatic start-stop control system of an F-level gas-steam combined cycle system, and as shown in fig. 1, the system includes a monitoring background and a plurality of control cabinets corresponding to different controlled F-level gas-steam combined cycle systems; the monitoring background controls the operation of each corresponding F-level gas-steam combined circulation system through each control cabinet and acquires the operation information of the corresponding F-level gas-steam combined circulation system;
each control cabinet comprises a power supply, a process control module, an input/output interface module and a communication module; the process control module is connected and communicated with the monitoring background through the communication module; the input/output interface module comprises an input module and an output module; the process control module acquires the operation parameter information of the controlled combined cycle system through the input module; outputting a control instruction to the controlled combined cycle system through an output module;
the process control module comprises a system control unit and a plurality of single equipment control units; and the system control unit controls the start or stop of each device in the corresponding subsystem through each single device control unit according to the operation parameter information of the controlled combined cycle system so as to control the start or stop of a plurality of subsystems in the controlled combined cycle system.
In the embodiment shown in fig. 1, in each control cabinet, the power supply includes at least two power supply modules provided redundantly and a redundancy switching module, and the redundancy switching module controls one of the power supply modules to provide operating power to other devices in the control cabinet according to the operating state of each power supply module. The redundant configuration and redundant switching of the power supply can be implemented by the prior art.
In each control cabinet, the process control module comprises a main control module and a standby control module which are mutually standby, the main control module and the standby control module are communicated with each other and are respectively connected and communicated with the power supply, the input/output interface module and the communication module. When the device is applied, the switching between the main control module and the standby control module can be manually realized by field personnel as required, or the states of the main control module and the standby control module are mutually monitored in real time to realize that the main control module and the standby control module are mutually standby, and when the process control module which executes the process control at present generates a device fault, the device can be switched to another process control module, so that the control reliability is improved.
In each control cabinet, a process control module, a power supply, an input/output interface module and a communication module are respectively connected and communicated through a power supply and a data bus.
And the control cabinets are connected and communicated with the monitoring background through the network switch.
The controlled combined circulation system is connected with the network switch through the communication manager and further connected and communicated with the monitoring background. Other control devices or intelligent equipment are generally arranged in the F-level gas-steam combined cycle system, and the equipment is connected and communicated with the monitoring background to be used for communicating other information, so that the expansion of the control function of the invention or other equipment in the F-level gas-steam combined cycle system is facilitated.
In the invention, the combined cycle system is a single-shaft F-grade gas turbine combined cycle system or a double-shaft F-grade gas turbine combined cycle system. The invention has versatility for both combined cycle systems.
When the control system is applied, each control cabinet is respectively and correspondingly used for controlling a controlled F-level gas-steam combined circulation system, when the F-level gas-steam combined circulation system is controlled, a double-layer control strategy is implemented, the system control unit executes system layer control, the single equipment control unit executes single equipment layer control, the system layer control can realize the sequential start of all subsystems of a certain specific process of the combined circulation system, the single equipment layer control can complete the control of each single equipment in the corresponding subsystem, the double-layer control mode can support the combination of the serial step sequence and the parallel step sequence of the start and stop of the system, the start and stop waiting time is reduced, and the start and stop control efficiency is improved. The control logic of the system control unit related to the process sequence and the control logic of the single equipment control unit to each single equipment can refer to the existing manual start-stop control logic.
Example 2
Generally, and with reference to FIG. 2, a class F gas steam combined cycle system includes a class F gas turbine and its auxiliary subsystems, a waste heat boiler and its auxiliary subsystems, a steam turbine and its auxiliary subsystems, and peripheral and utility subsystems.
Based on embodiment 1, this embodiment can be used as a self-start-stop control method of the class F gas-steam combined cycle system shown in fig. 2, and includes:
referring to fig. 3 and 4, a double-layer control unit structure, i.e., a system control unit and a single device control unit, is adopted;
the system control unit determines the starting or stopping sequence of each subsystem according to the process flow data obtained by pre-analysis;
the system control unit respectively sends starting or stopping instruction signals to each single equipment control unit according to the starting or stopping sequence;
each single equipment control unit receives the starting or stopping control signal and controls the starting or stopping of each single equipment in the corresponding subsystem;
in the process of starting and stopping control, each single equipment control unit acquires the running state data of each single equipment in the corresponding subsystem, and performs equipment control according to the acquired running state data.
The start-stop control strategy of the invention does not adopt the traditional design layering according to the unit level, the function group level, the function subgroup level, the equipment control level, the interface module and the like, but implements simple and effective double-layer control structure and control strategy by decomposing the process subsystem of the F-level gas-steam combined cycle unit, namely, realizes the start-stop control of a single combined cycle system by a system control unit layer for executing the system level control and a single equipment control unit layer for executing the single equipment level control. The system control unit layer realizes the sequential start of all subsystems of a certain specific process of the combined cycle system, the single equipment control unit layer completes the control of each single equipment in the corresponding subsystem, and the mode of double-layer control supports the combination of the serial step sequence and the parallel step sequence of the start and stop of the system.
The system control unit layer executes the highest control task and is responsible for starting and stopping the system, and the system control unit layer is a core part of self-starting and stopping and comprises starting mode preselection and coordination (cold state, warm state and hot state), whole plant starting and stopping program management, human-computer interface information and the like. Mainly for managing the start-stop of each process subsystem.
The single equipment control unit layer receives the instruction of the system control unit layer, receives various signals in the production process, processes distribution, monitoring, alarming, calculating, locking, interlocking and protecting, processes the driving signals of all actuating mechanisms, and performs open-loop and closed-loop control on corresponding process subsystems.
Referring to fig. 3, when controlling the start of the controlled combined cycle system, the start control sequence of the subsystems may be: the auxiliary system starts AS control and waste heat boiler water supply HW control, the gas turbine and the gas compressor are started to be connected to the grid GS, the waste heat boiler is started to carry load HL, the steam turbine starts SS control, the steam turbine is connected to the grid and load is increased to enter an automatic power generation control mode UL.
Referring to fig. 4, when the controlled combined cycle system is controlled to stop, the stop control sequence of the subsystems is as follows: the combined cycle system exits the automatic power generation control mode UD, the gas turbine system is unloaded to the minimum output GD, the steam turbine system is shut down ST, the gas turbine system is shut down GT, the exhaust-heat boiler system is shut down HT, and the auxiliary system is shut down until the combined cycle system is wholly shut down AT.
The start-stop process control of the combined cycle system adopts a mode of combining a serial step sequence and a parallel step sequence, and can accelerate the start-stop speed. Serial pacing, i.e. the control steps of a single plant that must be executed serially, is limited by the process flow and must be controlled in sequence, for example: the water supply control HW of the waste heat boiler system must be completed before the start control GS of the combustion engine system, and the parallel step sequence is a single equipment control step sequence which can be executed simultaneously, and such equipment has no necessary process flow limitation and can work in parallel to save the start/stop time of the unit, such as: the auxiliary system start control AS and the waste heat boiler system water supply control HW can be executed in parallel according to specific requirements.
In order to ensure that the control functions of all levels are unified and paced, the states of all process subsystems need to be accurately represented and judged. The characterization signal is comprehensively judged by using an original signal sent by a primary element on site, and the original signal sent by the primary element on site of each subsystem mainly comprises the pressure, the temperature, the current of the transfer equipment, the start-stop signal of the equipment, the valve switching signal and the like of each process subsystem. The accurate judgment of the characterization signals is the basis for realizing the automatic start-stop.
The automatic start-stop control system and the method of the invention are based on the characteristics of the original control scheme, and under the condition that the original functions are completely reserved, a simple and effective two-layer control structure is newly designed, and when the system is applied specifically, the process of starting and stopping the original manual operation unit by operating personnel can be solidified into the program automatically executed by the process control module, namely, the function block of the control layer of the single equipment is rewritten in a code mode, so that the resource occupation of the control system can be greatly reduced.
Referring to fig. 3, an automatic start-up program framework is shown, referring to fig. 4, an automatic stop program framework is shown, and referring to fig. 3 and fig. 4, in the automatic start-up and stop control method for the F-class gas-steam combined cycle system provided by the present invention, each system layer control corresponds to a plurality of single equipment layer controls at the lower layer, each system layer control automatically identifies the different states of the system, such as cold state, steady state, hot state, extreme hot state, etc., according to the main parameters of the combined cycle system, and then selects the corresponding system layer control flow stage according to these states, and sets the adaptive time constant for the open-loop control, and at the same time, the parameters of the closed-loop control regulator are also dynamically adjusted to realize the fastest start-up and stop control at. Meanwhile, according to the state of the unit, the unit is started by combining a serial step sequence and a parallel step sequence, and a certain system layer can control the subordinate single equipment layers in parallel by controlling other system layers so as to reduce waiting time and accelerate the execution of the step sequence.
In addition, the invention can be further improved as follows: firstly, an equipment simulation function is added, a simulation mode option is provided for an equipment level function block, when the option is selected, a single equipment control unit can simulate a controlled equipment to carry out running state signal feedback through a received instruction, the function can provide a means for off-line verification of an automatic start-stop control system, the risk of occurrence of artificial programming errors or design errors of an open-loop system is reduced, and the success rate of the automatic start-stop control system is improved; secondly, the added equipment action firstly has a memory function, and records the equipment execution condition in the self-starting and self-stopping process, so that the problem can be conveniently analyzed and searched; integrating multiple execution mechanisms, unifying three-instruction, double-instruction and single-instruction equipment by analyzing the characteristics of the field execution mechanism, providing equipment type options, and providing special options with corresponding characteristics for different types of equipment, such as simplified permission condition options, instruction pulse time options, overtime reset options, feedback instruction consistency options and the like. The unified device function block can reduce the learning cost.
The system and the method greatly improve the conventional closed-loop control system, realize the whole-process steam bypass control, the whole-process boiler drum water supply control, the main steam desuperheating water optimal control and the like, the whole-process control means that the unit can keep the closed-loop control always in an 'automatic' control mode under the shutdown state, the output of the closed-loop controller can be in a tracking current value according to the state of the corresponding system, when the adjusting condition meets the preset requirement, the closed-loop controller can immediately and automatically enter an automatic adjusting working mode, thereby greatly reducing the response time of the closed-loop control and improving the control quality.
The invention analyzes the defects of the existing self-starting and stopping control method at home and abroad according to the characteristic of frequent starting and stopping of the F-level gas-steam combined cycle system, simplifies the control structure according to the control requirements of each system and the experience and actual requirements of operators aiming at the process characteristics and the mutual relation of different main and auxiliary machines of the system, and establishes the F-level gas-steam combined cycle system self-starting and stopping control system and the control method thereof. By matching with a control method suitable for a technological process, the automatic start-stop control of the F-grade gas-steam combined cycle system is realized, the labor intensity of operators is reduced, the safety of the start-stop process is improved, the start-stop time is saved, meanwhile, the optimal operation program can be solidified, the difference of the operation of different operators is reduced, and the start-stop time is shortened.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An automatic start-stop control system of an F-level gas-steam combined cycle system is characterized by comprising a monitoring background and a plurality of control cabinets corresponding to different controlled F-level gas-steam combined cycle systems; the monitoring background controls the operation of each corresponding F-level gas-steam combined circulation system through each control cabinet and acquires the operation information of the corresponding F-level gas-steam combined circulation system;
each control cabinet comprises a power supply, a process control module, an input/output interface module and a communication module; the process control module is connected and communicated with the monitoring background through the communication module; the input/output interface module comprises an input module and an output module; the process control module acquires the operation parameter information of the controlled combined cycle system through the input module and outputs a control instruction to the controlled combined cycle system through the output module;
the process control module comprises a system control unit and a plurality of single equipment control units; and the system control unit controls the start or stop of each device in the corresponding subsystem through each single device control unit according to the operation parameter information of the controlled combined cycle system so as to control the start or stop of a plurality of subsystems in the controlled combined cycle system.
2. The automatic start-stop control system of a class F gas-steam combined cycle system as claimed in claim 1, wherein in each control cabinet, the power supply comprises at least two power supply modules arranged redundantly and a redundancy switching module, and the redundancy switching module controls one of the power supply modules to provide working power supply to other equipment in the control cabinet according to the running state of each power supply module.
3. The automatic start-stop control system of a class F gas-steam combined cycle system as claimed in claim 1, wherein in each control cabinet, the process control module comprises a main control module and a standby control module which are standby for each other, communicate with each other, and are respectively connected and communicated with the power supply, the input/output interface module and the communication module.
4. The automatic start-stop control system of the F-level gas-steam combined cycle system as claimed in claim 1, wherein in each control cabinet, the process control module, the power supply, the input/output interface module and the communication module are respectively connected and communicated through a power supply and a data bus.
5. The automatic start-stop control system of the F-level gas-steam combined cycle system as claimed in claim 1, wherein the controlled combined cycle system is connected with the network switch through the communication manager, and further connected and communicated with the monitoring background.
6. The F-class gas-steam combined cycle system automatic start-stop control system as claimed in claim 1, wherein the combined cycle system is a single-shaft F-class gas turbine combined cycle system or a double-shaft F-class gas turbine combined cycle system.
7. A control method of the automatic start-stop control system of the F-grade gas-steam combined cycle system of any one of claims 1 to 6, wherein the F-grade gas-steam combined cycle system comprises an F-grade gas turbine and an auxiliary subsystem thereof, a waste heat boiler and an auxiliary subsystem thereof, a steam turbine and an auxiliary subsystem thereof, peripheral equipment and a public subsystem; the system start-stop control method is characterized by comprising the following steps:
the system control unit determines the starting or stopping sequence of each subsystem according to the process flow data obtained by pre-analysis;
the system control unit respectively sends starting or stopping instruction signals to each single equipment control unit according to the starting or stopping sequence;
each single equipment control unit receives the starting or stopping control signal and controls the starting or stopping of each single equipment in the corresponding subsystem;
in the process of starting and stopping control, each single equipment control unit acquires the running state data of each single equipment in the corresponding subsystem, transmits the running state data to the system control unit, and controls the equipment according to the acquired running state data; and the system control unit identifies the system state according to the received running state data of the single equipment and adjusts the control parameters in the starting or stopping instruction signals sent to the single equipment control unit according to the state identification result.
8. The method as claimed in claim 7, wherein the control modes of the individual device control units include a normal control mode for actual control and a simulation control mode for off-line simulation;
under the simulation control mode, the single equipment control unit receives a starting or stopping instruction signal of the system control unit, obtains a simulation equipment running state signal by using a preset equipment control model corresponding to the controlled single equipment, and feeds the simulation equipment running state signal back to the system control unit.
9. The method as claimed in claim 7 or 8, wherein, when controlling the start of the controlled combined cycle system, the start control sequence of the subsystems is as follows: the method comprises the steps of auxiliary system starting, waste heat boiler water feeding control, gas turbine and compressor starting control to grid connection, waste heat boiler starting loaded, steam turbine starting control, steam turbine grid connection control and load increasing entering into an automatic power generation control mode.
10. The method as claimed in claim 7 or 8, wherein when the controlled combined cycle system is controlled to stop, the stop control sequence of the subsystems is as follows: the combined cycle system exits the auto-generation control mode, the gas turbine system is de-loaded to a minimum output, the steam turbine system is shut down, the gas turbine system is shut down, the waste heat boiler system is shut down, and the system is assisted until the combined cycle system is shut down as a whole.
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