A general sequential starting method and system for a heavy-duty gas turbine

Abstract

The application discloses a kind of general sequential starting method and system of heavy gas turbine, it is related to heavy gas turbine starting technical field, including obtaining heavy gas turbine trip item and starting operating condition data, trigger starting instruction signal, activate trigger sequence control module, select the starting mode of heavy gas turbine, if no trip item appears and starting operating condition is all satisfied, start sequential starting, select starting mode.The application solves the problem that the starting process of heavy gas turbine is not flexible enough, flexibly constructs the starting system according to actual demand, and guarantees the safety of the unit;Realize the flexible starting and rapid and safe operation of the unit, through the coordinated operation of multiple steps and systems, ensure that each component in the starting process can start in the correct order, avoid failure and damage caused by improper starting, with the characteristics of flexible and easy to use, safe and reliable and strong portability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heavy-duty gas turbine starting, in particular to a universal sequential starting method and system for heavy-duty gas turbines. BACKGROUND

[0002] Sequential starting control of heavy-duty gas turbines is one of the key links to ensure the safe and efficient operation of gas turbines, involving the coordinated operation of multiple steps and systems to ensure that each component of the gas turbine can be started in the correct sequence during the starting process, avoiding failures and damage caused by improper starting, and having an important influence on the reliability, economy and operating efficiency of the gas turbine.

[0003] The sequential starting control method of gas turbines is usually based on empirical rules, with parameters such as starting sequence and time delay set to achieve control, which is simple and easy to implement, but may not be flexible and accurate enough for complex starting processes; foreign countries have been researching sequential starting control of gas turbines for a long time, in addition to using sequential starting control methods based on empirical rules, they have also introduced advanced control algorithms and intelligent technologies, and through modeling and simulation of the gas turbine starting process, they have optimized the starting control strategy to improve the starting efficiency and reliability of the gas turbine. Since China has been researching sequential starting control of heavy-duty gas turbines for a relatively short time, there is no mature sequential starting system that has been applied to domestic heavy-duty gas turbines. SUMMARY

[0004] In view of the problems existing in the universal sequential starting method of heavy-duty gas turbines, the present application is proposed, based on the building block method, a sequential control module is designed, the heavy-duty gas turbine unit level and sub-group level sequential starting system is flexibly constructed according to actual needs, and through priority setting, protection is integrated into the sequential starting system, which can timely handle abnormal conditions such as overheating and overpressure, and perform shutdown protection to avoid damage or even explosion of equipment, which has been successfully applied to the first domestic F-class gas turbine G50 unit, proving the feasibility and reliability of the method.

[0005] Therefore, the problem to be solved by the present application is how to provide a universal sequential starting method and system for heavy-duty gas turbines.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] In a first aspect, the embodiments of the present application provide a general sequential starting method of a heavy-duty gas turbine, which comprises: obtaining a heavy-duty gas turbine trip item and starting operation condition data, triggering a starting instruction signal, activating a trigger sequential control module, and starting step sequence timing; selecting an automatic starting mode or a single-step starting mode; when the automatic starting mode is selected, the sequential control module is activated when the starting instruction signal is triggered, the next sequential control module is automatically triggered when any starting operation condition is completed, and this sequential control module is frozen; the step sequence timing is started when the sequential control module is activated, and the step sequence timing is stopped when a pause signal is received, and the next step is not automatically performed even if the completion condition is received; when the single-step starting mode is selected, the next step is not automatically performed after any starting operation condition is completed; an operator selects a starting mode of the heavy-duty gas turbine through a starting static frequency conversion starting device SFC, and starts a total process control trigger button; if no trip item appears and all starting operation conditions are met, the sequential starting of the heavy-duty gas turbine is started, and the starting mode is selected.

[0008] As a preferred scheme of the general sequential starting method of the heavy-duty gas turbine, the trip item comprises that the unit is not allowed to start under any unit protection condition; the starting operation condition comprises conditions required to be met when the unit is normally started, including that the gas turbine body, the lubricating oil system, the generator, and the control system all meet the specified conditions; and the sequential starting comprises sequentially performing test setting time determination, determining whether the selected static frequency conversion starting device SFC state is normal according to the determination result, and selecting to execute the starting mode of the heavy-duty gas turbine.

[0009] As a preferred scheme of the general sequential starting method of the heavy-duty gas turbine, the test setting time comprises valve self-checking setting time, electromagnetic valve test setting time, and leakage test setting time; the starting mode comprises an automatic mode, a debugging mode, a high disc mode, a water washing mode, and a cooling mode; the valve self-checking setting time comprises detecting whether a time since last valve self-checking program execution has exceeded a setting time initial value, and when the time since last valve self-checking program execution has exceeded the setting time, performing a valve self-checking program to perform opening and closing operations of different openings on fuel valves and pressure control valves on a fuel system, and IGV valves and bleed valves on a compressor; if any valve instruction feedback deviation is large or a feedback signal is a bad quality during execution of the valve self-checking program, the starting program continues to be interrupted, and a valve self-checking failure is reported, and the total process control is exited; if all valve actions are normal during execution of the valve self-checking program, a valve self-checking success prompt is reported, and the next step of the total process control is entered; when the time since last valve self-checking program execution has not exceeded the setting time, the program automatically enters the next step of the total process control.

[0010] As a preferred scheme of the general sequential starting method of the heavy-duty gas turbine, the electromagnetic valve test set time comprises detecting whether the time since the last electromagnetic valve test has exceeded the set time, and when the time since the last electromagnetic valve test has exceeded the set time, an electromagnetic valve test procedure is executed, the safety oil pressure is established, and the system control sends a command to energize the four safety oil pressure electromagnetic valves; the four safety oil pressure electromagnetic valves are operated, and it is observed whether the safety oil pressure electromagnetic valve action and the safety oil intermediate oil pressure change are normal; if the electromagnetic valve test procedure is executed, the safety oil pressure electromagnetic valve action or the safety oil intermediate oil pressure change is abnormal, the starting procedure is interrupted, a prompt of electromagnetic valve test failure is given, and the total control is exited; if the electromagnetic valve test procedure is executed, the safety oil pressure electromagnetic valve action and the safety oil intermediate oil pressure change are normal, a prompt of electromagnetic valve test success is given, and the next step of the total control is entered; when the time since the last electromagnetic valve test has not exceeded the set time, the next step of the total control is directly entered.

[0011] As a preferred scheme of the general sequential starting method of the heavy-duty gas turbine, the leakage test set time comprises detecting whether the time since the last leakage test has exceeded the set time; when the time since the last leakage test has exceeded the set time, a leakage test procedure is executed; the pressure control valve is opened for 10 seconds and then closed, the residual gas fuel in the fuel system is discharged to the atmosphere, the safety oil pressure is established, the gas shutoff valve is opened, and the gas exhaust valve is closed, and it is observed whether the pressure change after the pressure control valve within one minute meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve; if the pressure change after the pressure control valve meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve, the pressure control valve is fully opened for 10 seconds and then closed, the safety oil pressure is unloaded, and it is observed whether the pressure change after the pressure control valve within one minute meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve before the safety oil pressure is unloaded; if the leakage test procedure is executed, the valve action or the pressure change after the pressure control valve is abnormal, the starting procedure is interrupted, a prompt of leakage test failure is given, and the total control is exited; if the leakage test procedure is executed, the valve action and the pressure change after the pressure control valve are normal, a prompt of leakage test success is given, and the next step of the total control is entered; when the time since the last leakage test has not exceeded the set time, the next step of the total control is directly entered.

[0012] As a preferred scheme of the general sequential starting method of the heavy-duty gas turbine, when the automatic mode or the debugging mode is selected, the starting selection SFC is selected, the SFC target speed is set as the blow-down speed, and the speed-up instruction is sent to the SFC; when the SFC starting speed-up is abnormal, the SFC starting failure and the SFC speed-up abnormality are reported, the starting main protection action is started, and the starting program is exited; when the SFC starting speed-up is normal, the heavy-duty gas turbine is continuously started until the speed reaches the blow-down speed, the blow-down timing is performed until the blow-down timing reaches the set time, whether the speed during the blow-down is normal is judged during the blow-down timing, if the speed during the blow-down is abnormal, the SFC speed stabilization failure during the blow-down is reported, the starting main protection action is started, and the starting program is exited, if the speed during the blow-down is normal, the heavy-duty gas turbine starting is continuously performed; after the blow-down timing is completed, the SFC target speed is set as the ignition speed, the heavy-duty gas turbine speed is reduced to the ignition speed and stably operated for 15 seconds, and whether the SFC speed reduction is normal is judged; when the SFC speed reduction is abnormal, the SFC speed reduction abnormality is reported, the starting main protection action is started, and the starting program is exited; when the SFC speed reduction is normal, the heavy-duty gas turbine starting is continuously performed until the speed reaches the ignition speed, the ignition is started, the safety oil pressure is established, the fuel valve is opened, the fuel circuit is kept unblocked, the ignition plug discharge is started, and the discharge time is 30 seconds, when the ignition fails, the ignition failure is reported, the starting main protection action is started, and the starting program is exited; when the ignition succeeds, the heavy-duty gas turbine starts to warm up and time, until the warm-up is completed; after the warm-up is completed, the SFC is set as the torque mode, the heavy-duty gas turbine speed is increased to 4800 rpm; if the SFC is not set as the torque mode, the SFC power mode switching failure is reported, the starting main protection action is started, and the starting program is exited; if the SFC is successfully set as the torque mode, the heavy-duty gas turbine starting is continuously performed, whether the gas turbine hot acceleration is normal is judged, if the gas turbine hot acceleration is abnormal, the gas turbine speed abnormality is reported, the starting main protection action is started, and the starting program is exited; if the gas turbine hot acceleration is normal, the heavy-duty gas turbine starting is continuously performed until the heavy-duty gas turbine speed reaches the tripping speed; after the heavy-duty gas turbine speed reaches the tripping speed, whether the SFC tripping is normal is judged, when the SFC tripping is abnormal, the SFC tripping failure is reported, the starting main protection action is started, and the starting program is exited; when the SFC tripping is normal, the heavy-duty gas turbine starting is continuously performed, and the heavy-duty gas turbine hot acceleration is continuously performed; after the hot acceleration is continuously performed, whether the heavy-duty gas turbine hot acceleration is still normal is judged, if the heavy-duty gas turbine hot acceleration is abnormal, the gas turbine speed stabilization failure is reported, the starting main protection action is started, and the starting program is exited; if the heavy-duty gas turbine hot acceleration is normal, the heavy-duty gas turbine speed is accelerated to the full speed, and the full-speed idle state is entered; after the full-speed idle state is entered, the heavy-duty gas turbine excitation is set as the constant voltage mode, the excitation system is started, whether the excitation system is successfully started is judged, if the excitation system starting fails, the excitation system failure is reported, the starting main protection action is started, and the starting program is exited;If the excitation system is started successfully, the heavy gas turbine synchronization device is put into operation, the control system accepts the speed-up or speed-down instruction of the synchronization device, when the generator outlet voltage and frequency match the grid phase, the generator outlet circuit breaker is closed, the unit is connected to the grid, and the rotating standby load is carried; if any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

[0013] As a preferred scheme of the general sequential starting method of the heavy gas turbine, when the high disc mode is selected, the program automatically starts the selected SFC, sets the SFC target speed to the cleaning blow speed, and sends a speed-up instruction to the SFC, when the turbine speed reaches the cleaning blow speed, the sequential starting process is completed, and the turbine is stably operated at the cleaning blow speed; if any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured; when the cooling mode is selected, the program automatically determines the interval of the turbine wall temperature according to the turbine combustion cylinder, turbine cylinder wall temperature and turbine wheel disc chamber temperature, the interval includes B zone, C zone and D zone; when the cooling mode is in the B zone, the SFC target speed is set to the cooling speed, a speed-up instruction is sent to the SFC, when the turbine reaches the cooling speed, the program sends a stop instruction to the SFC, and waits for 18 minutes; if the cooling mode is still in the B zone, the SFC target speed is set to the cooling speed for continuous cooling cleaning blow; if the temperature decreases to the C zone, the SFC target speed is set to the cooling speed for cooling cleaning blow, and a speed-up instruction is sent to the SFC; when the turbine reaches the cooling speed, a stop instruction is sent to the SFC, and waiting for 18 minutes, if the cooling mode is still in the C zone, the SFC target speed is set to the cooling speed for continuous cooling cleaning blow; if the temperature decreases to the D zone, the SFC target speed is set to the cooling speed for continuous cooling cleaning blow, and the SFC does not stop after reaching the cooling speed, and the cooling cleaning blow is continuously performed; if any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured; when the water washing mode is selected, the program starts the selected SFC, sets the SFC target speed to the water washing speed, and sends a speed-up instruction to the SFC, when the turbine speed reaches the water washing speed, the program automatically opens the IGV angle to the maximum, opens the water washing electromagnetic valve, starts the water washing pump, and starts the water washing.

[0014] In a second aspect, the embodiments of the present application provide a general sequential starting system of a heavy gas turbine, which comprises:

[0015] In a third aspect, an embodiment of the present application provides a computer device, comprising a memory and a processor, and the memory stores a computer program, wherein the processor executes the computer program to implement any step of the above method.

[0016] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to implement any step of the above method.

[0017] The present application has the beneficial effect of developing a sequential control module with multiple trigger conditions and multiple completion conditions, and integrating protection into the sequential control module through priority setting, solving the problem that the prior art is not flexible enough for the complex starting process of a gas turbine, and flexibly constructing a heavy-duty gas turbine unit level and sub-group level sequential starting system according to actual needs, ensuring the safety of the unit; a heavy-duty gas turbine unit level and sub-group level sequential starting system is designed based on the sequential control module in a building block manner, the sequential starting method covers the whole starting process of the gas turbine, including valve self-checking, electromagnetic valve testing, leakage testing and other subsystems, and also includes five unit starting modes of automatic mode, debugging mode, high-plate mode, water washing and cooling mode, and the flexible starting and rapid and safe operation of the unit are realized on the first domestic F-class gas turbine G50 unit, through the coordinated operation of multiple steps and systems, it is ensured that each component of the gas turbine can be started in the correct order during the starting process, and faults and damages caused by improper starting are avoided; the sequential starting method has the characteristics of flexibility, ease of use, safety and reliability, and strong portability. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0019] Figure 1 Flowchart of the general sequential starting method for the heavy-duty gas turbine.

[0020] Figure 2 Automatic mode starting flowchart of the general sequential starting method for the heavy-duty gas turbine. DETAILED DESCRIPTION

[0021] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0022] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. However, the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0023] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0024] Embodiment 1

[0025] Reference Figures 1-2 For the first embodiment of the present application, the embodiment provides a general sequential starting method of a heavy-duty gas turbine, comprising:

[0026] S1: Obtain the heavy-duty gas turbine trip item and starting operation condition data, trigger the starting instruction signal, activate the trigger sequence control module, and start the step sequence timing. Select the automatic starting mode or the single-step starting mode.

[0027] Specifically, the trip item includes that the unit is not allowed to start under any unit protection condition; the starting operation condition includes the conditions required to be met during normal starting of the unit, including that the gas turbine body, the lubricating oil system, the generator and the control system all meet the specified conditions; the sequential starting includes sequentially determining the test setting time, determining whether the selected static frequency conversion starting device SFC state is normal according to the determination result, and selecting the starting mode of the heavy-duty gas turbine.

[0028] S2: When the automatic starting mode is selected, the sequence control module is activated when the starting instruction signal is triggered, and the next sequence control module is automatically triggered when any starting operation condition is completed. The sequence control module is frozen, and the step sequence timing starts when the sequence control module is activated. When the pause signal comes, the step sequence timing stops, and even if the condition is completed, the next step is not automatically performed; when the single-step starting mode is selected, the next step is not automatically performed after any starting operation condition is completed;

[0029] The test setting time includes a valve self-checking setting time, a solenoid valve test setting time and a leakage test setting time.

[0030] The valve self-checking setting time includes detecting whether a set time initial value has passed since a last valve self-checking program execution time. When the set time has passed since the last valve self-checking program execution time, a valve self-checking program is executed to perform opening and closing operations of valves at different opening degrees on fuel valves and pressure control valves of a fuel system and IGV valves and bleed valves of a compressor. If a feedback deviation of any valve instruction is large or a feedback signal is bad during execution of the valve self-checking program, the large deviation refers to a large deviation between any valve instruction and actual feedback, which has affected normal operation of the unit. Generally, the deviation is set to be greater than 5% and a protection trip is required. Quality judgment is whether an automatic detection signal of a control system is abnormal. If the signal is abnormal, the signal is judged to be bad and a start program is interrupted for continuous execution. A valve self-checking failure is reported and total program control is exited. If all valve actions are normal during execution of the valve self-checking program, a valve self-checking success is reported and a next step of the total program control is entered. When the set time has not passed since the last valve self-checking program execution time, the program automatically enters the next step of the total program control.

[0031] The solenoid valve test setting time includes detecting whether a set time initial value has passed since a last solenoid valve test execution time. When the set time has passed since the last solenoid valve test execution time, a solenoid valve test program is executed to establish a safety oil pressure and control system issues a 4-safety oil pressure solenoid valve energization instruction. Opening and closing operations of the 4-safety oil pressure solenoid valves are performed to observe whether safety oil pressure solenoid valve actions and safety oil intermediate oil pressure changes are normal. If the safety oil pressure solenoid valve actions or the safety oil intermediate oil pressure changes are abnormal during execution of the solenoid valve test program, whether the safety oil pressure solenoid valves are normally actuated, i.e., whether the solenoid valves are energized, is judged. If the solenoid valves are not energized or the safety oil pressure is low after the solenoid valves are energized, a safety oil pressure abnormality alarm is triggered, a start program is interrupted for continuous execution, a solenoid valve test failure is reported and the total program control is exited. If the safety oil pressure solenoid valve actions and the safety oil intermediate oil pressure changes are normal during execution of the solenoid valve test program, a solenoid valve test success is reported and a next step of the total program control is entered. When the set time has not passed since the last solenoid valve test execution time, the next step of the total program control is directly entered.

[0032] The leak test setting time includes detecting whether the time since the last leak test execution has passed the set time; when the time since the last leak test execution has passed the set time, the leak test procedure is executed; the pressure control valve is opened for 10 seconds and then closed, residual gas fuel in the fuel system is discharged to the atmosphere, the safety oil pressure is established, the gas shutoff valve is opened, the gas exhaust valve is closed, and it is observed whether the pressure change behind the pressure control valve within one minute meets the condition that the pressure change behind the pressure control valve is less than 2% of the pressure before the pressure control valve; if the pressure change behind the pressure control valve is less than 2% of the pressure before the pressure control valve, the pressure control valve is fully opened for 10 seconds and then closed, the safety oil pressure is unloaded, and it is observed whether the pressure change behind the pressure control valve within one minute meets the condition that the pressure change behind the pressure control valve is less than 2% of the pressure before the pressure control valve; if the valve action and the pressure change behind the pressure control valve are abnormal during the execution of the leak test procedure, the start-up procedure is interrupted and continues to be executed, a leak test failure prompt is reported, and the total control is exited; if the valve action and the pressure change behind the pressure control valve are normal during the execution of the leak test procedure, a leak test success prompt is reported, and the next step of the total control is entered; when the time since the last leak test execution has not passed the set time, the next step of the total control is directly entered.

[0033] S3: The operator selects the start-up mode of the heavy-duty gas turbine by starting the static frequency conversion start-up device SFC, starts the total control trigger button, and when no bailout item appears and all start-up operation conditions are met, starts the sequential start-up of the heavy-duty gas turbine, and selects the start-up mode.

[0034] Specifically, the start-up mode includes an automatic mode, a debugging mode, a high-plate mode, a water washing mode, and a cooling mode.

[0035] When the automatic mode or the debugging mode is selected, the SFC is started, the SFC target rotating speed is set as the sweep blowing rotating speed, the initial value is 1100 rpm, and a speed-up instruction is sent to the SFC; when the SFC starts to speed up abnormally, SFC start failure and SFC speed-up abnormality are reported, the main protection action is started, and the starting program is exited; when the SFC starts to speed up normally, the heavy-duty gas turbine is continuously started until the rotating speed reaches the sweep blowing rotating speed, the sweep blowing timing is performed, the sweep blowing time is initially set as 6 minutes, and the sweep blowing timing is performed until the set time is reached; during the sweep blowing timing, it is judged whether the rotating speed is normal during the sweep blowing period; if the rotating speed is abnormal during the sweep blowing period, SFC speed stabilization failure during the sweep blowing period is reported, the main protection action is started, and the starting program is exited; if the rotating speed is normal during the sweep blowing period, the heavy-duty gas turbine is continuously started; after the sweep blowing timing is completed, the SFC target rotating speed is set as the ignition rotating speed, the initial value is 750 rpm, the heavy-duty gas turbine rotating speed is reduced to the ignition rotating speed and stably runs for 15 seconds, and it is judged whether the SFC speed reduction is normal; when the SFC speed reduction is abnormal, SFC speed reduction abnormality is reported, the main protection action is started, and the starting program is exited; when the SFC speed reduction is normal, the heavy-duty gas turbine is continuously started until the rotating speed reaches the ignition rotating speed, ignition is started, safety oil pressure is established, the fuel valve is opened, the fuel circuit is kept unobstructed, ignition plug discharge is started, and the discharge time is 30 seconds; when the ignition fails, ignition failure is reported, the main protection action is started, and the starting program is exited; when the ignition succeeds, the heavy-duty gas turbine starts to warm up and timing is performed until the warm-up is completed; after the warm-up is completed, the SFC is set as the torque mode, and the heavy-duty gas turbine rotating speed is increased to 4800 rpm; if the SFC is not set as the torque mode, SFC power mode switching failure is reported, the main protection action is started, and the starting program is exited; if the SFC is successfully set as the torque mode, the heavy-duty gas turbine is continuously started, it is judged whether the coal machine hot acceleration is normal, if the coal machine hot acceleration is abnormal, gas turbine rotating speed abnormality is reported, the main protection action is started, and the starting program is exited; if the coal machine hot acceleration is normal, the heavy-duty gas turbine is continuously started until the heavy-duty gas turbine rotating speed reaches the tripping rotating speed; after the heavy-duty gas turbine rotating speed reaches the tripping rotating speed, it is judged whether the SFC tripping is normal; when the SFC tripping is abnormal, SFC tripping failure is reported, the main protection action is started, and the starting program is exited; when the SFC tripping is normal, the heavy-duty gas turbine is continuously started, and the heavy-duty gas turbine hot acceleration is continuously performed; after the hot acceleration is continuously performed, it is judged whether the heavy-duty gas turbine hot acceleration is still normal; if the heavy-duty gas turbine hot acceleration is abnormal, gas turbine speed stabilization failure is reported, the main protection action is started, and the starting program is exited; if the heavy-duty gas turbine hot acceleration is normal, the heavy-duty gas turbine rotating speed is accelerated to full speed, and the full-speed idle state is entered; after the full-speed idle state is entered, the heavy-duty gas turbine excitation is set as the constant voltage mode, the excitation system is started, it is judged whether the excitation system is started successfully, if the excitation system fails to start, excitation system failure is reported, the main protection action is started, and the starting program is exited;If the excitation system is started successfully, the heavy gas turbine synchronization device is put into operation, and the control system accepts the speed-up or speed-down command of the synchronization device. When the generator outlet voltage and frequency match the grid, the generator outlet circuit breaker is closed, the unit is connected to the grid, and the rotating standby load is connected; if any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

[0036] When the high disc mode is selected, the program automatically starts the selected SFC, sets the SFC target speed to the cleaning speed, the initial value is 1100 rpm, and sends a speed-up command to the SFC. When the turbine speed reaches the cleaning speed, the sequence starting process is completed, the turbine is stabilized at the cleaning speed, and if any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

[0037] When the cooling mode is selected, the program automatically determines the interval of the turbine wall temperature according to the turbine combustion cylinder, turbine cylinder wall temperature and turbine disc chamber temperature. The interval includes B zone, C zone and D zone. When the cooling mode is in B zone, the SFC target speed is set to cooling speed 600 rpm, a speed-up command is sent to the SFC, and when the turbine reaches the cooling speed, the program sends a stop command to the SFC and waits for 18 minutes. If the cooling mode is still in B zone, the SFC target speed is set to the cooling speed for continuous cooling and cleaning. If the temperature decreases to C zone, the SFC target speed is set to the cooling speed for cooling and cleaning, and a speed-up command is sent to the SFC. When the turbine reaches the cooling speed, a stop command is sent to the SFC and waits for 18 minutes. If the cooling mode is still in C zone, the SFC target speed is set to the cooling speed 1100 rpm for continuous cooling and cleaning. If the temperature decreases to D zone, the SFC target speed is set to the cooling speed 1100 rpm for continuous cooling and cleaning. After reaching the cooling speed, the SFC does not stop, and the cooling and cleaning continue. If any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

[0038] When the water washing mode is selected, the program starts the selected SFC, sets the SFC target speed to the water washing speed, the initial value is 1100 rpm, and sends a speed-up command to the SFC. When the turbine speed reaches the water washing speed, the program automatically opens the IGV angle to the maximum, opens the water washing electromagnetic valve, starts the water washing pump, and starts the water washing. If any protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, the emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

[0039] Further, the embodiment further provides a general sequential starting system of a heavy-duty gas turbine, comprising: an acquisition module, configured to acquire a heavy-duty gas turbine trip item and starting operation condition data, trigger a starting instruction signal, activate a trigger sequential control module, and start a step sequence timing, and select an automatic starting mode or a single-step starting mode; a selection module, configured to, when the automatic starting mode is selected, trigger the starting instruction signal to activate the sequential control module, automatically trigger a next sequential control module when any starting operation condition is completed, and freeze the sequential control module, and when the sequential control module is activated, start the step sequence timing, and when a pause signal is received, stop the step sequence timing, and even if a completion condition is received, do not automatically proceed to the next step; and when the single-step starting mode is selected, do not automatically proceed to the next step after any starting operation condition is completed; and a starting module, configured to enable an operator to select a starting mode of the heavy-duty gas turbine through a starting static frequency conversion starting device SFC, start a total process control trigger button, and start a sequential starting of the heavy-duty gas turbine if no trip item appears and all starting operation conditions are met, and select a starting mode.

[0040] The embodiment further provides a computer device suitable for the general sequential starting method of the heavy-duty gas turbine, comprising: a memory and a processor; the memory is configured to store computer executable instructions, and the processor is configured to execute the computer executable instructions to implement all or part of the steps of the method according to the embodiment of the application.

[0041] The embodiment further provides a storage medium having a computer program stored thereon, and the computer program is executed by a processor to execute the method in any optional implementation manner of the above-mentioned embodiment. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic storage, a flash memory, a magnetic disk or an optical disk.

[0042] The storage medium according to the embodiment and the data storage method according to the above-mentioned embodiment belong to the same inventive concept, and the technical details not described in the embodiment can be referred to the above-mentioned embodiment, and the embodiment has the same beneficial effects as the above-mentioned embodiment.

[0043] The application develops a sequential control module with multiple trigger conditions and multiple completion conditions, and integrates protection into the sequential control module through priority setting, solves the problem that the prior art is not flexible enough for the complex starting process of a gas turbine, flexibly constructs a heavy-duty gas turbine unit level and sub-group level sequential starting system according to actual needs, and ensures the safety of the unit; a heavy-duty gas turbine unit level and sub-group level sequential starting system is designed based on the sequential control module in a building block manner, the sequential starting method covers the whole starting process of the gas turbine, including valve self-checking, electromagnetic valve testing, leakage testing and other subsystems, and also includes five unit starting modes of automatic mode, debugging mode, high-plate mode, water washing and cooling mode, and flexible starting and rapid and safe operation of the unit are realized on the first domestic F-class gas turbine G50 unit, through the coordinated operation of multiple steps and systems, it is ensured that each component of the gas turbine can be started in the correct order during the starting process, and faults and damages caused by improper starting are avoided; the method has the characteristics of flexibility, easy use, safety and reliability, and strong portability.

[0044] Example 2

[0045] Referring to Table 1, the second embodiment of the application provides a general sequential starting method for a heavy-duty gas turbine, in order to verify the beneficial effects of the application, scientific demonstration is carried out through economic benefit calculation and simulation experiment.

[0046] Table 1 Comparison of technical features

[0047] Technical features The method Traditional method Flexibility According to actual needs to build different starting processes Starting process is fixed Security Integrating protection mechanisms into sequential control to ensure safe startup Security is relatively weak Starting mode Including multiple starting modes to meet different scene needs Only a single starting mode Subsystem coverage Covering all subsystems of gas turbine startup Missing some subsystems Coordinated operation Through multi-step coordination to ensure correct startup sequence The startup sequence is not coordinated enough Portability Strong portability, suitable for different units and scenes Difficult to adapt to different situations

[0048] As can be seen from the above, the method integrates protection into the sequential control module through priority setting, solves the problem that the prior art is not flexible enough for the complex starting process of a gas turbine, flexibly constructs a heavy-duty gas turbine unit level and sub-group level sequential starting system according to actual needs, and ensures the safety of the unit; covers the whole starting process of the gas turbine, and realizes flexible starting and rapid and safe operation of the unit on the first domestic F-class gas turbine G50 unit, through the coordinated operation of multiple steps and systems, it is ensured that each component of the gas turbine can be started in the correct order during the starting process, and faults and damages caused by improper starting are avoided; the method has the characteristics of flexibility, easy use, safety and reliability, and strong portability.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the application and not to limit it, although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the application, and they should be covered in the scope of the claims of the application.

Claims

1. A method of universal sequential starting of a heavy duty gas turbine characterized by: Comprising, The heavy gas turbine jump item and start-up condition data are acquired, a start-up instruction signal is triggered, a trigger sequence control module is activated, and step sequence timing is started. An automatic start-up mode or a single-step start-up mode is selected; When the automatic start-up mode is selected, the sequence control module is activated when the start-up instruction signal is triggered, the next sequence control module is automatically triggered when any start-up condition is completed, and the sequence control module is frozen. When the sequence control module is activated, the step sequence timing is started. When the pause signal is received, the step sequence timing is stopped, and the next step is not automatically performed even if the completion condition is received. When the single-step start-up mode is selected, the next step is not automatically performed after any start-up condition is completed. The start-up static frequency conversion device SFC of the heavy gas turbine is selected by the operation personnel, the start-up total process control trigger button is started, and the sequence start-up of the heavy gas turbine is started when no jump item appears and all start-up conditions are met. The start-up mode is selected. When the automatic mode or the debugging mode is selected, the SFC is started, the target speed of the SFC is set as the blow-down speed, and the speed-up instruction of the SFC is sent. When the SFC start-up speed-up is abnormal, the SFC start-up failure is reported, the SFC speed-up is abnormal, the start-up main protection action is started, and the start-up program is exited. When the SFC start-up speed-up is normal, the heavy gas turbine is started until the speed reaches the blow-down speed, the blow-down timing is performed until the blow-down timing reaches the set time, and whether the speed is normal during the blow-down period is judged during the blow-down timing. If the speed is abnormal during the blow-down period, the SFC speed-up failure during the blow-down period is reported, the start-up main protection action is started, and the start-up program is exited. If the speed is normal during the blow-down period, the heavy gas turbine start-up is continuously performed. After the blow-down timing is completed, the target speed of the SFC is set as the ignition speed, the speed of the heavy gas turbine is reduced to the ignition speed and stably operated for 15 seconds, and whether the SFC speed-down is normal is judged. When the SFC speed-down is abnormal, the SFC speed-down abnormality is reported, the start-up main protection action is started, and the start-up program is exited. When the SFC speed-down is normal, the heavy gas turbine start-up is continuously performed until the speed reaches the ignition speed, the ignition is started, the safety oil pressure is established, the fuel valve is opened, the fuel circuit is kept unobstructed, the ignition plug discharge is started, and the discharge time is 30 seconds. When the ignition fails, the ignition failure is reported, the start-up main protection action is started, and the start-up program is exited. When the ignition is successful, the heavy gas turbine starts to warm up and timing is performed until the warm-up is completed. After the warm-up is completed, the SFC is set as the torque mode, and the speed of the heavy gas turbine is increased to 4800 rpm. If the SFC is not set as the torque mode, the SFC power mode switching failure is reported, the start-up main protection action is started, and the start-up program is exited. If the SFC is successfully set as the torque mode, the heavy gas turbine start-up is continuously performed, whether the coal machine hot acceleration is normal is judged, the gas turbine speed abnormality is reported if the coal machine hot acceleration is abnormal, the start-up main protection action is started, and the start-up program is exited. If the coal machine hot acceleration is normal, the heavy gas turbine start-up is continuously performed until the speed of the heavy gas turbine reaches the tripping speed. When the heavy-duty gas turbine speed reaches the tripping speed, it is determined whether the SFC tripping is normal. When the SFC tripping is abnormal, SFC is reported to be not tripped, the main protection action is started, and the starting program is exited. When the SFC tripping is normal, the heavy-duty gas turbine starting is continued, and the heavy-duty gas turbine thermal acceleration is continued. After the thermal acceleration is continued, it is determined whether the heavy-duty gas turbine thermal acceleration is still normal. When the heavy-duty gas turbine thermal acceleration is abnormal, the gas turbine speed stabilization failure is reported, the main protection action is started, and the starting program is exited. When the heavy-duty gas turbine thermal acceleration is normal, the heavy-duty gas turbine speed is accelerated to full speed, and the full-speed idle state is entered. After the full-speed idle state is entered, the heavy-duty gas turbine excitation is set to the constant voltage mode, the excitation system is started, it is determined whether the excitation system is started successfully, when the excitation system fails to start, the excitation system fault is reported, the main protection action is started, and the starting program is exited. When the excitation system is started successfully, the heavy-duty gas turbine synchronizing device is put into operation, the control system accepts the speed-up or speed-down instruction of the synchronizing device, when the generator outlet voltage and frequency are matched with the power grid, the generator outlet circuit breaker is closed, the unit is connected to the grid, and the rotating standby load is carried. If the protection tripping item appears at any stage of the starting process, the protection tripping sequence control is triggered, the emergency shutdown is performed, and the starting program is exited, so that the unit safety is ensured.

2. The method of claim 1, wherein: The tripping item includes that the unit is not allowed to start under any unit protection condition. The starting operation condition includes the condition required to be met by the unit during normal starting, including that the gas turbine body, the lubricating oil system, the generator and the control system all meet the specified condition. The sequence starting includes sequentially determining the test setting time, determining whether the selected static frequency conversion starting device SFC state is normal according to the determination result, and selecting the starting mode of the heavy-duty gas turbine to be executed.

3. The method of claim 2, wherein: The test setting time includes the valve self-checking setting time, the electromagnetic valve test setting time and the leakage test setting time. The starting mode includes the automatic mode, the debugging mode, the high-plate mode, the water washing mode and the cooling mode. The valve self-checking setting time includes detecting whether the time since the last valve self-checking program execution has exceeded the initial value of the setting time. When the time since the last valve self-checking program execution has exceeded the setting time, the valve self-checking program is executed, and different opening and closing operations of different opening degrees are performed on the fuel valves and pressure control valves on the fuel system, and the IGV valves and bleed valves on the compressor. If the feedback deviation of any valve instruction is large or the feedback signal is bad during the execution of the valve self-checking program, the starting program continues to be executed, the valve self-checking failure is reported, and the total process control is exited. If the valve action is normal during the execution of the valve self-checking program, the valve self-checking success prompt is reported, and the next step of the total process control is entered. When the time since the last valve self-checking program execution has not exceeded the setting time, the program automatically enters the next step of the total process control.

4. The method of claim 3, wherein: The electromagnetic valve test setting time includes detecting whether the time since the last electromagnetic valve test execution has exceeded the setting time. When the time since the last electromagnetic valve test execution has exceeded the setting time, the electromagnetic valve test program is executed, the safety oil pressure is established, and the control system sends the four safety oil pressure electromagnetic valves with the electric instruction. The safety oil pressure electromagnetic valve is switched on and off to observe whether the safety oil pressure electromagnetic valve action and the safety oil intermediate oil pressure change are normal; If the safety oil pressure electromagnetic valve action or the safety oil intermediate oil pressure change is abnormal during the execution of the electromagnetic valve test program, the starting program continues to be executed, and an electromagnetic valve test failure prompt is reported, and the total program control exits; If the safety oil pressure electromagnetic valve action and the safety oil intermediate oil pressure change are normal during the execution of the electromagnetic valve test program, a successful electromagnetic valve test prompt is reported, and the next step of the total program control is entered. When the execution time of the last electromagnetic valve test has not exceeded the set time, the next step of the total program control is directly entered.

5. The method of claim 4, wherein: The leakage test set time includes detecting whether the execution time of the last leakage test has exceeded the set time; When the execution time of the last leakage test has exceeded the set time, the leakage test program is executed. The pressure control valve is opened for 10 seconds and then closed, residual gas fuel in the fuel system is discharged to the atmosphere, the safety oil pressure is established, the gas shutoff valve is opened, and the gas discharge valve is closed, and it is observed whether the pressure change after the pressure control valve within one minute meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve, If the pressure change after the pressure control valve meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve, the pressure control valve is fully opened for 10 seconds and then closed, the safety oil pressure is unloaded, and it is observed whether the pressure change after the pressure control valve within one minute meets the requirement that the pressure change after the pressure control valve is less than 2% of the pressure before the pressure control valve before the safety oil pressure is unloaded; If the valve action and the pressure change after the pressure control valve are abnormal during the execution of the leakage test program, the starting program continues to be executed, and a leakage test failure prompt is reported, and the total program control exits; If the valve action and the pressure change after the pressure control valve are normal during the execution of the leakage test program, a successful leakage test prompt is reported, and the next step of the total program control is entered. When the high disc mode is selected, the program automatically starts the selected SFC, sets the SFC target speed to the cleaning blow speed, and sends a speed-up instruction to the SFC. When the gas turbine speed reaches the cleaning blow speed, the sequence starting process ends, and the gas turbine is stably operated at the cleaning blow speed. If a protection trip item occurs at any stage of the starting process, the protection trip sequence control is triggered, emergency shutdown is performed, the starting program is exited, and the safety of the unit is ensured.

6. The method of sequential starting of a heavy duty gas turbine as claimed in claim 5, characterized in that: When the cooling mode is selected, the program automatically determines the interval of the gas turbine wall temperature according to the gas turbine combustion cylinder, turbine cylinder wall temperature and turbine wheel disc chamber temperature. The interval includes B zone, C zone and D zone. When the cooling mode is in the B zone, the SFC target speed is set to the cooling speed, and a speed-up instruction is sent to the SFC. When the gas turbine reaches the cooling speed, the program sends a stop instruction to the SFC, and waits for 18 minutes. If the cooling mode is still in the B zone, the SFC target speed is set to the cooling speed for continuous cooling and cleaning blow. If the temperature decreases to the C zone, the SFC target speed is set to the cooling speed for cooling and cleaning blow, and a speed-up instruction is sent to the SFC. When the gas turbine reaches the cooling speed, a stop instruction is sent to the SFC, and if the cooling mode is still in the C zone, the SFC target speed is set to the cooling speed for continuous cooling and cleaning blow. ​ If the temperature decreases to the D zone, the SFC target speed is set to the cooling speed to continue cooling and blowing, and after reaching the cooling speed, the SFC does not stop running, and the cooling and blowing are continuously performed. If the protection trip item appears at any stage of the starting process, the protection trip sequence control is triggered, the emergency stop is performed, the starting program is exited, and the safety of the unit is ensured. When the water washing mode is selected, the program starts the selected SFC, sets the SFC target speed to the water washing speed, and sends a speed-up instruction to the SFC. When the speed of the gas turbine reaches the water washing speed, the program automatically opens the IGV angle to the maximum, opens the water washing electromagnetic valve, and starts the water washing pump to start water washing. If the protection trip item appears at any stage of the starting process, the protection trip sequence control is triggered, the emergency stop is performed, the starting program is exited, and the safety of the unit is ensured.

7. A universal sequential starting system of a heavy-duty gas turbine based on the universal sequential starting method of any one of claims 1 to 6, characterized in that: The method comprises the steps of: The acquisition module is used to acquire the heavy gas turbine trip item and the starting operation condition data, trigger the starting instruction signal, activate the trigger sequence control module, and start the step sequence timing. The selection module is used to select the automatic starting mode or the single-step starting mode. The selection module is used to select the automatic starting mode or the single-step starting mode. The starting module is used to start the heavy gas turbine sequence starting when no trip item appears and all starting operation conditions are met.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that: The processor executes the computer program to realize the steps of the general sequence starting method of the heavy gas turbine according to any one of claims 1-6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that: The computer program is executed by the processor to realize the steps of the general sequence starting method of the heavy gas turbine according to any one of claims 1-6.

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