Method for controlling turning, turning control system and turning control device

Abstract

The application relates to a control method, a control system and a control device of a turning gear. The method comprises the following steps: when a turning gear starting instruction sent by a steam turbine main control system is received by a controller, determining a current rotating speed of the steam turbine and a turning gear rotating speed, and controlling the turning gear to be put into operation according to the current rotating speed of the steam turbine and the turning gear rotating speed; and when a turning gear stopping instruction sent by the steam turbine main control system is received, determining a tripping state of the turning gear, and controlling the turning gear to be stopped according to the tripping state. The method realizes automatic starting and putting into operation of the turning gear under different working conditions of the steam turbine, and controls the turning gear to be automatically stopped under different working conditions of the tripping state of the turning gear. The method considers different working conditions when the turning gear is put into operation and different working conditions when the turning gear is stopped, so that the method can realize comprehensive control of the turning gear, and the stability and safety of the turning gear control are improved.

Description

Technical Field

[0001] This application relates to the field of nuclear power turbine technology, and in particular to a turning gear control method, a turning gear control system, and a turning gear control device. Background Technology

[0002] Nuclear power plant turbines are equipped with turning gears. These turning gears are primarily used to continuously turn the turbine rotor before unit startup or during shutdown coasting to lower speeds. This prevents serious accidents such as shaft bending and avoids permanent shaft deformation, ensuring the safe and stable operation of the turbine. The turbine turning gear consists of a turning actuator and a turning control cabinet. Before turbine startup or during shutdown, the turning control cabinet controls the turning actuator to maintain continuous turning of the turbine rotor.

[0003] Currently, the turning gear systems for nuclear power plant turbines are mainly purchased as complete sets from abroad. The control cabinets exhibit unstable operation, exhibiting issues such as controller malfunctions and lack of alarm signals after the unit turns the brakes. Furthermore, the spare parts and technology for these control cabinets are entirely dependent on foreign manufacturers. Domestic users have no understanding of the operating principles and status of these control cabinets, making it difficult to accurately and promptly pinpoint the cause of each malfunction, thus placing a significant burden on nuclear power unit operators and maintenance personnel.

[0004] Therefore, how to provide a highly stable turning gear control method has become an urgent technical problem to be solved in the field of steam turbine technology. Summary of the Invention

[0005] Therefore, it is necessary to provide a control method, control system, and control device for turning gears that can improve the stability of turning gears, in order to address the above-mentioned technical problems.

[0006] Firstly, this application provides a method for controlling a turning gear, the method comprising:

[0007] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0008] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0009] In one embodiment, controlling the turning gear operation based on the current turbine speed and the turning gear speed includes:

[0010] When the current speed of the steam turbine is determined to be the first value, and the turning gear speed is also the first value, the turning gear is controlled to engage, and the turning gear motor is controlled to start. When the first engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0011] In one embodiment, the method further includes:

[0012] After the turning gear is put into operation, if the current speed of the turbine is detected to be greater than the current speed of the turning gear, the turning gear is controlled to perform a tripping operation, and the turning gear is confirmed to have successfully tripped upon receiving the first tripping completion signal from the turning gear.

[0013] In one embodiment, controlling the turning gear operation based on the current turbine speed and the turning gear speed includes:

[0014] When the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value, the motor of the turning gear is started to rotate to the first preset speed. When the second value is determined to drop to the first preset speed, the gear of the turning gear is controlled to engage. When the second engagement completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation. The third value is less than the second value.

[0015] In one embodiment, controlling the turning gear operation based on the current turbine speed and the turning gear speed includes:

[0016] When the current speed of the steam turbine is determined to be the fourth value, and the turning gear speed is also the fourth value, the gears of the turning gear are controlled to engage. When the third engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0017] In one embodiment, controlling the derailment of the turning gear based on the tripped state includes:

[0018] Once it is determined that the turning gear is in the disengaged state, the motor controlling the turning gear is shut down to stop the turning gear operation.

[0019] In one embodiment, controlling the derailment of the turning gear based on the tripped state includes:

[0020] If the tripping status of the turning gear is determined to be non-tripping, the turning gear is controlled to perform a tripping operation. Upon receiving the second tripping completion signal from the turning gear, the turning gear motor is controlled to shut down, thus stopping the turning gear.

[0021] In one embodiment, the method further includes:

[0022] When a fault signal is detected in the turning gear, a fault alarm message is output on the control panel. Fault signals include speed deviation, turning gear not engaging within a specified time, low speed after the turning gear starts, low main shaft speed after the turning gear starts, liquid level coupler overheating, turning gear not starting without command, turning gear not disengaged, and speed probe failure.

[0023] Secondly, this application also provides a turning gear control system, which includes: a turning gear control cabinet, a turbine main control system, a turning gear, and a turbine; the turning gear control cabinet is connected to the turbine main control system and the turning gear, and the turbine main control system is connected to the turbine.

[0024] The controller in the turning gear control cabinet is used to execute the turning gear control method as described in any embodiment of the first aspect.

[0025] Thirdly, this application also provides a turning gear control device, which includes:

[0026] The commissioning module is used to determine the current speed of the turbine and the turning gear speed when it receives the turning gear start command sent by the turbine main control system, and to control the turning gear commissioning according to the current speed of the turbine and the turning gear speed.

[0027] The shutdown module is used to determine the disengagement status of the turning gear when it receives a turning gear shutdown command from the turbine main control system, and to control the turning gear shutdown based on the disengagement status.

[0028] Fourthly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0029] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0030] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0031] Fourthly, this application also provides a computer-readable storage medium. This computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0032] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0033] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0034] Fifthly, this application also provides a computer program product. This computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0035] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0036] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0037] The aforementioned turning gear control method, control system, and control device, through a controller, determine the current turbine speed and turning gear speed upon receiving a turning gear start command from the turbine main control system, and control the turning gear to start operation based on these speeds. Conversely, upon receiving a turning gear stop command from the turbine main control system, the controller determines the turning gear's disengagement status and controls the turning gear to stop operation based on this status. This method enables automatic starting and stopping of the turning gear under different turbine operating conditions, and automatic stopping and starting of the turning gear under different operating conditions while it is in a disengaged state. It considers both the different operating conditions during turning gear start-up and shutdown, thus achieving comprehensive control of the turning gear and improving its stability and safety. Attached Figure Description

[0038] Figure 1 This is a diagram of a turning gear control system for a turning gear control method in one embodiment;

[0039] Figure 2 This is a flowchart illustrating the control method for turning gears in one embodiment;

[0040] Figure 3 This is a flowchart illustrating the control method for the turning gear in another embodiment;

[0041] Figure 4 This is a structural block diagram of the control cabinet for the rotary locomotive in one embodiment;

[0042] Figure 5 This is a structural block diagram of the control device for turning the wheel in one embodiment;

[0043] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] Steam turbine generator sets generate electricity by having steam enter the turbine stage and do work, driving the turbine rotor to rotate, which in turn drives the generator rotor. Nuclear power plant turbines are equipped with a turning gear, which is mainly used to continuously turn the turbine rotor before unit startup or when it coasts to a lower speed after shutdown. This prevents serious accidents such as shaft bending and avoids permanent shaft deformation, ensuring the safe and stable operation of the turbine. The turbine turning gear consists of a turning actuator and a turning control cabinet. Before turbine startup or during shutdown, the turning control cabinet controls the turning actuator to maintain the continuous turning of the turbine rotor. Due to the large weight and torque of the nuclear power turbine generator rotor, the requirements for the turning gear are much stricter. Its reliability, commissioning, operation, and maintenance have become key focuses for nuclear power turbine professionals.

[0046] Currently, the turning gear systems for nuclear power plant turbines are mainly purchased as complete sets from abroad. The control cabinets exhibit unstable operation, exhibiting issues such as controller malfunctions and lack of alarm signals after the unit turns the brakes. Furthermore, the spare parts and technology for these control cabinets are entirely dependent on foreign manufacturers. Domestic users have no understanding of the operating principles and status of these control cabinets, making it difficult to accurately and promptly pinpoint the cause of each malfunction, thus placing a significant burden on nuclear power unit operators and maintenance personnel.

[0047] Therefore, how to provide a turning gear control method with excellent stability has become a pressing technical problem in the field of steam turbine technology. This application provides a turning gear control method aimed at solving the aforementioned technical problem. The following embodiments will specifically illustrate the turning gear control method described in this application.

[0048] The control method for turning gears provided in this application embodiment can be applied to, for example, Figure 1The turning gear control system shown includes a turning gear control cabinet 01, a turbine main control system 02, a turning gear 03, and a turbine 04. The turning gear control cabinet 01 is connected to both the turbine main control system 02 and the turning gear 03, and the turbine main control system 02 is connected to the turbine 04. The turning gear control cabinet 01 includes a controller 010, an alarm 011, and other components. The controller 010 controls the starting and stopping of the turning gear. The controller can be a PLC (Programmable Logic Controller), or other types of controllers, including personal computers, laptops, smartphones, tablets, and IoT devices. This embodiment does not limit the type of controller. The alarm 011 provides alerts for abnormal situations. The turbine main control system 02 controls and monitors the turbine's operating status, and manages and regulates the turbine's operation to ensure the safe and efficient operation of the system. Specifically, the turbine main control system is a DCS (Distributed Control System) control system.

[0049] Those skilled in the art will understand that Figure 1 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the turning gear control system to which the present application is applied. A specific turning gear control system may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0050] In one embodiment, such as Figure 2 As shown, a control method for turning a gear is provided, which is applied to... Figure 1 Taking controller 010 as an example, the explanation includes the following steps:

[0051] S201, upon receiving the turning gear start command sent by the turbine main control system, determines the current turbine speed and turning gear speed, and controls the turning gear to start operation based on the current turbine speed and turning gear speed.

[0052] Among them, the turning gear start command is used to instruct the turning gear to start operation.

[0053] In this embodiment, before sending a start command to the turning gear controller, the turbine main control system needs to determine whether the GGR system (turbine lubrication oil system, jacking oil system, and turning gear system) and other equipment such as auxiliary / emergency oil pumps, exhaust fans, main turning gear, and auxiliary turning gear are functioning normally. It also needs to power all equipment requiring operation within the system and activate the corresponding controls. After these preliminary preparations are completed, the turbine main control system can send a remote turning gear start command to the turning gear. Upon receiving the start command from the turbine main control system, the turning gear controller can determine the current turbine speed and the turning gear speed, and then control the turning gear start-up based on these speeds. Specifically, the controller can control the turning gear start-up by opening a solenoid valve or by using other control switches; this embodiment does not limit the method of controlling the turning gear start-up.

[0054] Understandably, since different turbine speeds and turning gear speeds represent different operating conditions for the turning gear, and the control methods for different operating conditions are also different, the controller can determine an operating condition by determining the current turbine speed and turning gear speed, and then implement different controls to control the starting and operation of the turning gear. The operating conditions for starting and operating the turning gear include those when the turbine is stationary, those during turbine deceleration after a trip, those during turbine deceleration after a brief acceleration, and others. The operating condition when the turbine is stationary indicates the situation where the turning gear is engaged when the turbine needs to start from a standstill; the operating condition during turbine deceleration after a trip indicates the situation where the turning gear is engaged during deceleration after a turbine malfunction or manual trip; the operating condition during turbine deceleration after a brief acceleration indicates the situation where, after starting and disengaging the turning gear, the turbine speed has not reached the expected value and the turning gear is re-engaged during deceleration.

[0055] S202, upon receiving a turning gear shutdown command from the turbine main control system, determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0056] The turning gear shutdown command is used to instruct the turning gear to stop operation. The turning gear disengagement status indicates that when the turbine speed is greater than or equal to the turning gear speed, and the turbine no longer needs the turning gear to continue increasing speed, the turning gear is disengaged.

[0057] In this embodiment, when it is necessary to stop the turning gear, a remote turning gear stop command can be sent from the turbine main control system to the turning gear controller. Upon receiving the turning gear stop command from the turbine main control system, the turning gear controller can determine whether the turning gear is in a disengaged or not-disengaged state. If the turning gear is not disengaged, it must be disengaged before the turning gear can be stopped. Specifically, the controller can stop the turning gear by controlling the solenoid valve to close, or it can control the turning gear to stop by other control switches. This embodiment does not limit the method of controlling the turning gear operation.

[0058] Understandably, since different tripping states of the turning gear represent different operating conditions, and the control methods for different operating conditions are also different, the controller can determine an operating condition by identifying the tripping state of the turning gear, and then implement different controls to stop the turning gear operation. The operating conditions for stopping the turning gear operation include the tripping condition after the turbine speed is increased, the operating condition after the turbine has been turning for a long time, and other conditions. The tripping condition after the turbine speed is increased indicates the situation where the turbine speed is greater than the turning gear speed, and turning is no longer needed; the operating condition after the turbine has been turning for a long time indicates the situation where the turning gear operation is automatically stopped or manually stopped after a pre-set time.

[0059] The aforementioned turning gear control method, upon receiving a turning gear start command from the turbine main control system, determines the current turbine speed and turning gear speed, and controls the turning gear to start operation based on these speeds. Conversely, upon receiving a turning gear stop command from the turbine main control system, it determines the turning gear's disengagement status and controls its shutdown based on this status. This method enables automatic starting and stopping of the turning gear under different turbine operating conditions, and automatic stopping and starting of the turning gear under different operating conditions while it is in a disengaged state. It considers both the different operating conditions during turning gear start-up and shutdown, thus achieving comprehensive control of the turning gear and improving its stability and safety.

[0060] In one embodiment, a step of controlling the turning gear to start operation when the turbine is in a static operating condition is also provided. The step S201 above, "controlling the turning gear to start operation according to the current turbine speed and the turning gear speed", includes: when it is determined that the current turbine speed is a first value and the turning gear speed is a first value, controlling the gear of the turning gear to perform a meshing operation, and controlling the motor of the turning gear to start, and determining that the turning gear has been successfully started when the first meshing completion signal is received from the turning gear.

[0061] Here, the rotational speed, represented by the first value, indicates that the turbine or turning gear is stationary. This first value can be zero or a value close to zero. The first engagement completion signal indicates the signal after gear engagement, and can be fed back by the first gear engagement feedback switch.

[0062] In this embodiment, before sending a start command to the turning gear controller, the turbine main control system needs to ensure that the turbine rotor is stationary. Then, it supplies power to the GGR system (turbine lubrication oil system, jacking oil system, and turning gear system), as well as auxiliary / emergency oil pumps, exhaust fans, main turning gear, auxiliary turning gear, and other equipment. After power supply, GGR001KG (the sequence control for the lubrication oil system) is activated and started on the turbine main control system interface. Then, it is further confirmed that GGR010PO / GGR012PO (AC lubrication oil pumps) are starting normally, one exhaust fan is starting normally, the lubrication oil tank level is normal, and the GGR system header pressure is normal. Afterward, the GHE system (power generation sealing oil system) and GGR002KG (the sequence control for the power generation sealing oil system) can be activated and started. Finally, it is confirmed that one jacking oil pump is starting normally and that the jacking oil pressure is normal. Optionally, this process can be completed automatically by the turbine main control system, manually by the operator clicking on the turbine main control system interface, or by the operator combining the turbine main control system interface with the actual site conditions. After the above preparations are completed, the turbine main control system can send a remote start command to the turning gear controller.

[0063] After receiving the start command from the turning gear controller, the controller can determine the current turbine speed and the turning gear speed. When both the turbine speed and the turning gear speed are at a first value (e.g., both 0), the solenoid valve can be energized to further control the turning gear gears to engage. Once the gears reach initial engagement, the turning gear motor can be started, and then the gears can be fully engaged. When the controller receives the first engagement completion signal from the pre-set gear engagement switch, it can determine that the turning gear has been successfully put into operation. The controller can also determine successful turning gear operation by determining that the turbine speed is greater than or equal to the turning gear speed. Optionally, the controller can be energized through other switches to further control the turning gear gears to engage. Furthermore, when the controller determines that the turbine speed and the turning gear speed are at the first value, it can delay for a period of time to ensure that the turbine and the turning gear are stationary. Furthermore, when controlling the turning gear gears to engage, the controller can delay for a period of time after initial engagement to ensure that the gears have begun to engage.

[0064] In the above embodiments, by determining that both the turbine speed and the turning gear speed are at the first value before triggering the turning gear meshing operation, it can be ensured that the operation is performed when both the turbine and the turning gear are stationary, reducing the risk of accidental operation and danger, and improving operational safety. Furthermore, by controlling the energization and delay of the solenoid valve, it can be ensured that the initial and full meshing operations of the turning gear are performed at appropriate times and under appropriate conditions, reducing meshing operation errors, improving accurate gear meshing, and thus ensuring successful commissioning of the turning gear.

[0065] In one embodiment, a control method for a turning gear is also provided. The method further includes: after the turning gear is put into operation, when it is detected that the current speed of the turbine is greater than the current speed of the turning gear, controlling the turning gear to perform a tripping operation, and determining that the turning gear tripping is successful when a first tripping completion signal is received from the turning gear.

[0066] The first tripping completion signal indicates that the gears are not engaged, and this signal can be fed back by the second gear engagement feedback switch.

[0067] In this embodiment, a feedback switch for the second gear engagement of the turning gear can be pre-set. After the controller determines that the turning gear has been successfully put into operation based on the above steps, it can monitor the current speed of the turbine and the current speed of the turning gear in real time. When the current speed of the turbine is greater than the current speed of the turning gear, it can control the turning gear to perform a tripping operation. Upon receiving the first tripping completion signal from the feedback switch for the second gear engagement of the turning gear, it can be determined that the turning gear has successfully tripped. In the above embodiment, by monitoring the current speeds of the turbine and the turning gear in real time, the controller can accurately determine the timing of the tripping, ensuring that the tripping operation is performed under a suitable speed difference, thereby improving the accuracy and safety of the operation.

[0068] In one embodiment, a step of controlling the turning gear to operate during the deceleration process after a turbine trip is also provided. The step S201 above, "controlling the turning gear to operate according to the current turbine speed and the turning gear speed", includes: when it is determined that the current turbine speed is a second value and the turning gear speed is a third value, controlling the motor of the turning gear to start rotating to a first preset speed, and when it is determined that the second value has dropped to the first preset speed, controlling the gear of the turning gear to perform a meshing operation, and when a second meshing completion signal is received from the turning gear, determining that the turning gear has been successfully operated; the third value is less than the second value.

[0069] The second value represents the turbine speed during the rapid decrease in rotational speed; it can be 1350 rpm or a value close to 1350 rpm. The first preset speed is the speed at which the turbine needs to be manually rotated; it can be 7.3 rpm or a value close to 7.3 rpm. The third value, representing the rotational speed when the turbine is stationary, can be 0 or a value close to 0. The first preset speed is the turbine speed during manual rotation; it can be 8 rpm or a value close to 8 rpm. The second engagement completion signal indicates the signal after gear engagement and can be fed back by the first gear engagement feedback switch.

[0070] In this embodiment, before sending a start command to the turning gear controller, the turbine main control system needs to ensure that GGR001KG (sequence control for the lubricating oil system), GGR002KG (sequence control for the generator sealing oil system), GGR002KC (first selection module for the oil pump), GGR020KC (second selection module for the oil pump), and other system equipment are all powered on. Then, it confirms that one exhaust fan is operating normally and the oil tank level is normal. After confirming a turbine trip, it confirms that GGR010PO / GGR012PO (first AC lubricating oil pump / second AC lubricating oil pump) starts normally and that the main pipe pressure of the GGR system (turbine lubricating oil system, jacking oil system, and turning gear system) is normal. When the turbine speed decreases to approximately 1350 rpm, it controls GGR002KC (sequence control for the generator sealing oil system) to automatically start, then confirms that one jacking oil pump starts and that the jacking oil pressure is normal. Optionally, this process can be completed automatically by the turbine main control system, manually by the operator clicking on the turbine main control system interface, or by the operator combining the turbine main control system interface with the actual site conditions. After the above preparations are completed, the turbine main control system can send a remote start command to the turning gear controller.

[0071] After receiving the start command from the turning gear controller, the controller can determine the current turbine speed and the turning gear speed. When the current turbine speed is a second value (e.g., 1350 rpm) and the turning gear speed is a third value (e.g., 0 rpm), the controller can start the turning gear motor to rotate until it reaches the first preset speed (e.g., 8 rpm) and maintain that speed, waiting to turn the rapidly decelerating turbine to prevent it from stopping too quickly and thus avoiding rotor deformation. When the turbine speed drops from the second value (e.g., 1350 rpm) to the first preset speed (e.g., 7.3 rpm), the turbine speed is now less than the turning gear speed, allowing the turning gear to rotate the turbine. The controller can control the gears of the turning gear to engage. When the controller receives the first engagement completion signal from the pre-set first gear engagement switch, it controls the solenoid valve or other switches to close, confirming successful turning gear operation.

[0072] In the above embodiments, by controlling the rotation of the turning gear, when the turbine speed drops below the turning gear speed, the meshing operation of the turning gear can further slow down the turbine speed reduction, provide additional rotational kinetic energy, and help to smoothly control the turbine shutdown process.

[0073] In one embodiment, a step of controlling the turning gear to operate during the deceleration process after a brief speed increase of the steam turbine is also provided. The "controlling the turning gear to stop according to the tripping status" in the above step S202 includes: when it is determined that the current speed of the steam turbine is the fourth value and the speed of the turning gear is the fourth value, controlling the gear of the turning gear to perform a meshing operation, and determining that the turning gear has been successfully put into operation when the third meshing completion signal is received from the turning gear feedback.

[0074] The fourth value, representing the rotational speed, indicates the state of the turbine being engaged by the turning gear. This fourth value can be 8 or a value close to 8. The third engagement completion signal indicates the signal after gear engagement, which can be fed back by the first gear engagement feedback switch.

[0075] In this embodiment, before sending a start command to the turning gear controller, the turbine main control system needs to ensure that GGR001KG (sequence control for the lubricating oil system), GGR002KG (sequence control for the generator sealing oil system), GGR002KC (first selection module for the oil pump), GGR020KC (second selection module for the oil pump), and other system equipment are all powered on. Then, it confirms that GGR010PO / GGR012PO (first AC lubricating oil pump / second AC lubricating oil pump) are operating normally, that one exhaust fan is operating normally, that the oil level in the oil tank is normal, and that the main pipe pressure of the GGR system (turbine lubricating oil system, jacking oil system, and turning gear system) is normal. When the turbine briefly accelerates and its speed exceeds the turning gear speed, the controller automatically disengages the turning gear. The turning gear receives the first disengagement completion signal. When the turbine's current speed is the fourth value (e.g., 8), it indicates that the turning gear needs to be turned to accelerate the turbine back to the expected value. At the same time, when the turning gear speed is the fourth value (e.g., 8), the turning gear can be controlled to engage. When the controller receives the third engagement completion signal from the pre-set first gear engagement switch, it controls the solenoid valve or other switches to close, thus confirming that the turning gear has been successfully put into operation.

[0076] In the above embodiments, by rotating the turning gear again, the turbine speed can be increased to the expected value, the turbine can be restored to a stable operating state, and the turbine can be kept operating within the preset speed range. This enables effective coordination and cooperation between the turning gear and the turbine, ensuring the reliability and continuous operation of the system.

[0077] In one embodiment, a step of stopping the turning gear after the turbine speed is increased by tripping is also provided. The step S202 above, "stopping the turning gear according to the tripping state", includes: when it is determined that the tripping state of the turning gear is a tripped state, controlling the motor of the turning gear to shut down to stop the turning gear.

[0078] In this embodiment, the controller monitors the turbine speed in real time. When the controller detects that the turbine speed exceeds the turning gear speed and continues to increase, the controller controls the turning gear to automatically disengage. When the controller receives the first disengagement completion signal from the second gear engagement feedback switch, i.e., when the turning gear is in a disengaged state, and the turbine main control system detects that the turbine speed has increased to exceed a second value (e.g., 1350), the turbine main control system can issue a turning gear shutdown command. After receiving the turning gear shutdown command, the controller can control the motor to stop, thereby controlling the turning gear to stop. After the turning gear stops, the turbine main control system automatically or manually shuts down GGR002KC (the first selection module of the oil pump), automatically or manually shuts down the jacking oil pump, and automatically or manually controls GGR010PO / GGR012PO (the first AC lubricating oil pump / the second AC lubricating oil pump) to stop.

[0079] In the above embodiments, when the turbine trips after speeding up, the controller controls the shut-off of the turning gear according to the remote shutdown command from the master controller. This ensures that the turbine can be safely shut down when a shutdown is required during operation, reducing the risks during the shutdown process. Furthermore, shutting down the turning gear when it is not needed reduces wear and tear and usage time of the turning gear and related equipment, thus reducing maintenance costs. In addition, shutting down the lubrication system also extends the service life of the lubricating oil and lubricated components.

[0080] In one example, a step is also provided to control the turning gear to stop operation after a steam turbine has been turning for a long time. The step S202 above, "controlling the turning gear to stop operation according to the tripping status", includes: when it is determined that the tripping status of the turning gear is not tripped, controlling the turning gear to perform a tripping operation, and when a second tripping completion signal is received from the turning gear, controlling the turning gear motor to shut down to perform the turning gear to stop operation.

[0081] The second tripping completion signal indicates that the gears are not engaged, and can be fed back by the second gear engagement feedback switch.

[0082] In this embodiment, when the turbine main control system determines that the turning gear is in an un-disengaged state, it sends a remote shutdown command to the turning gear via GGR002KG (the first selection module for the oil pump). After receiving the shutdown command, the controller automatically disengages the turning gear. When the controller receives the second disengagement completion signal from the second gear engagement feedback switch, indicating that the turning gear is in a disengaged state, it shuts down the turning gear motor. When the turbine main control system detects that the turbine rotor has slowed down to a stationary state, it shuts down the jacking oil pump, then shuts down the lubrication system via GGR001KG (the sequence control for the lubrication system), and remotely controls GGR010PO / GGR012PO (the first AC lubrication pump / the second AC lubrication pump) to shut down, and after a preset time (e.g., 1 hour), it automatically shuts down the exhaust fan. Furthermore, the controller can delay the automatic tripping operation of the turning gear for a period of time to ensure that the turning gear has fully completed the automatic tripping operation.

[0083] In the above embodiments, when the controller determines that the turning gear is not in a disengaged state, it first controls the turning gear to perform a disengagement operation, and then stops the turning gear from operation. This ensures a safe shutdown of the turbine and reduces the risks during the shutdown process. Furthermore, shutting down other systems such as the lubrication system and the jacking oil system can also extend the service life of these systems.

[0084] In one embodiment, a method for controlling the turning gear is also provided, the method further comprising: when a fault signal of the turning gear is detected, outputting fault alarm information on the control panel.

[0085] The fault signals include: rotational speed deviation of the turning gear, failure of the turning gear to engage within a specified time, low rotational speed after starting the turning gear, low main shaft speed after starting the turning gear, overheating of the liquid level coupler in the turning gear, starting the turning gear without command, the turning gear not disengaging properly, and a faulty rotational speed probe of the turning gear.

[0086] In this embodiment, an alarm can be pre-installed on the control cabinet. When the controller detects a fault signal in the turning gear, such as when the corresponding signal is not detected within a preset time as described in the aforementioned steps, a fault alarm message can be output on the control panel of the control cabinet. Specifically, different alarm lights or audible and visual alarm lights can be set for different situations, or different alarm lights or audible and visual alarm lights can be set according to different fault types. In addition, the controller can also implement a fail-safe (FAILSAFE) function, that is, when the turning gear is in a fault state, it can control the turning gear to automatically disengage, thereby placing the system in a safe state. Specifically, the controller can control the turning gear to automatically disengage after the solenoid valve loses power and the motor stops. In practical applications, the FAILSAFE state is equivalent to the state before initial commissioning.

[0087] In the above embodiments, by outputting fault alarm information on the control panel, faults related to the turning gear can be detected, located, and handled in a timely manner, preventing accidents, improving the reliability and safety of the equipment, and ensuring the stable operation of the system.

[0088] In summary, based on all the above embodiments, a method for controlling the turning gear is also provided, such as... Figure 3 As shown, the method includes:

[0089] S301, upon receiving the turning gear start command sent by the turbine main control system, determines the current turbine speed and turning gear speed.

[0090] S302: When the current speed of the steam turbine is determined to be the first value, and the turning gear speed is also the first value, the turning gear is controlled to engage, and the turning gear motor is controlled to start. When the first engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0091] S303, when the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value, the motor of the turning gear is controlled to start and rotate to the first preset speed. When the second value is determined to drop to the first preset speed, the gear of the turning gear is controlled to perform a meshing operation. When the second meshing completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation. The third value is less than the second value.

[0092] S304: When the current speed of the steam turbine is determined to be the fourth value, and the turning gear speed is also the fourth value, the turning gear is controlled to perform a meshing operation, and when the third meshing completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation.

[0093] S305, after the turning gear is put into operation, if it is detected that the current speed of the steam turbine is greater than the current speed of the turning gear, it controls the turning gear to perform a trip operation, and confirms that the turning gear trip is successful when it receives the first trip completion signal from the turning gear.

[0094] S306, upon receiving a turning gear stop command from the turbine main control system, determines the disengagement status of the turning gear.

[0095] S307: When it is determined that the turning gear is in the disengaged state, the motor of the turning gear is shut down to stop the turning gear.

[0096] S308, when it is determined that the derailment status of the turning gear is not derailed, controls the turning gear to perform a derailment operation, and when it receives the second derailment completion signal from the turning gear, controls the turning gear motor to shut down and stops the turning gear.

[0097] S309, when a fault signal is detected in the turning gear, outputs fault alarm information on the control panel; the fault signals include turning gear speed deviation, turning gear not engaging within a specified time, low speed after turning gear start, low main shaft speed after turning gear start, overheating of the liquid level coupler in the turning gear, turning gear starting without command, turning gear not disengaged, and turning gear speed probe failure.

[0098] The methods described in each of the above steps have been described in the foregoing embodiments. For details, please refer to the foregoing descriptions. They will not be repeated here.

[0099] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0100] Based on the same inventive concept, embodiments of this application also provide a turning gear control system, such as... Figure 1 As shown, the system includes: a turning gear control cabinet, a turbine main control system, a turning gear, and a turbine; the turning gear control cabinet is connected to both the turbine main control system and the turning gear, and the turbine main control system is connected to the turbine; the controller in the turning gear control cabinet is used to execute the turning gear control method as described in any of the above embodiments. Figure 4 As shown, the turning gear control cabinet can include a PLC controller and a touch screen HMI. The touch screen can be used to display the turning gear's operating status information (such as the turning gear generator speed information) and alarm information. Additionally, users can locally control the starting and stopping operations of the turning gear via the touch screen on the controller, and can also modify parameters through the touch screen's display page. Since the input and output are all digital signals, and the number of points is not large, the most basic model can be used; the optimal configuration is a Siemens S7-200 SMART ST20 PLC paired with a Siemens 700IE V3 7-inch touch screen.

[0101] The control cabinet can be drilled on-site using a hand drill to install buttons and alarms to achieve alarm functions (such as...). Figure 4The BJI designation in the box represents the alarm. Other indicator lights can also be added, and various electrical components can be installed inside the box using electrical rails. Specifically, 1mm² red and blue multi-core copper wires can be used to connect the various electrical components. Among them, HR1 is the power indicator, HO1 is the alarm indicator, HG1 is the remote signal indicator, HG2 is the solenoid valve energized indicator, HG3 is the motor / heater running indicator, and HG4 is the motor start indicator. BSI can represent the reset button, and QSI can represent the power button.

[0102] In this embodiment, the controller paired with a touchscreen provides an intuitive graphical interface. The touchscreen can display and monitor the status information or alarm information of the main turning gear in real time, which helps to promptly identify problems, adjust parameters, and improve the visualization and controllability of the production process. Secondly, users can control the start and stop of the main turning gear via the touchscreen without needing to go to the site, improving safety. They can also modify corresponding parameters through the touchscreen for flexible control and configuration. Furthermore, users can complete the required operations through simple touch, click, and drag-and-drop interactions on the touchscreen. Compared to traditional buttons, switches, and knobs, touchscreen operation is more direct and efficient, significantly improving operational and work efficiency.

[0103] It should be noted that this embodiment only provides a structure for a manual turntable control cabinet. The positions and numbers of indicator lights, alarms, and other lights on the control cabinet are not limited in this embodiment; their specific positions and quantities can be set according to actual needs. Furthermore, the content displayed on the touchscreen on the controller is not limited in this embodiment; the content to be displayed can be set according to actual needs. The solution provided by this manual turntable control system is similar to the solution described in the above method and will not be repeated here.

[0104] Through the self-developed matching barring control cabinet, on-site operation and maintenance personnel can fully master the control logic inside the control cabinet. Based on the problems found during actual use, the control logic can be further optimized and updated. In case of faults in the control cabinet, they can also be handled by replacing components. This not only provides a large space for subsequent updates and renovations, high safety and quality levels, but also greatly reduces the subsequent operation and maintenance costs. Moreover, it can achieve the domestic substitution of the main barring control cabinet of the nuclear power plant steam turbine, reduce the subsequent operation and maintenance costs, improve the operation level, safety and quality capabilities. There is a large space for the renewal and transformation of the equipment, and on-site operation and maintenance personnel can fully master the control logic inside the control cabinet, which can greatly reduce the maintenance period and improve the fault troubleshooting response level. At the same time, the barring control cabinet also has the functions of operating status indication and local start / stop of the barring. Using this new control cabinet is very beneficial to the subsequent upgrade and transformation of the equipment, improves the understanding and control of the equipment control process, and greatly enhances the operation level and safety and quality status of the equipment.

[0105] Those skilled in the art can understand that Figure 1 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the barring control system to which the solution of this application is applied. The specific barring control system may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0106] Based on the same inventive concept, the embodiments of this application also provide a barring control device for implementing the barring control method involved above. The solution provided by this device to solve problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the barring control device provided below can be referred to the limitations on the barring control method in the above text, and will not be repeated here.

[0107] In one embodiment, as Figure 5 shown, a barring control device is provided, including:

[0108] A commissioning module 10, configured to determine the current speed of the steam turbine and the barring speed when receiving a barring start instruction sent by the main control system of the steam turbine, and control the commissioning of the barring according to the current speed of the steam turbine and the barring speed.

[0109] A shutdown module 11, configured to determine the tripping state of the barring when receiving a barring shutdown instruction sent by the main control system of the steam turbine, and control the shutdown of the barring according to the tripping state.

[0110] In one embodiment, the commissioning module 10 is specifically used to control the gears of the turning gear to engage and the motor of the turning gear to start when the current speed of the turbine and the turning gear speed are both determined to be a first value. Upon receiving the first engagement completion signal from the turning gear, the module determines that the turning gear has been successfully commissioned.

[0111] In one embodiment, the above-mentioned turning gear control device further includes:

[0112] The determination module is used to control the turning gear to perform a trip operation when it detects that the current speed of the turbine is greater than the current speed of the turning gear after the turning gear is put into operation, and to determine that the turning gear trip is successful when it receives the first trip completion signal from the turning gear.

[0113] In one embodiment, the above-mentioned commissioning module 10 is specifically used to control the motor of the turning gear to start rotating to the first preset speed when the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value; when the second value is determined to drop to the first preset speed, control the gear of the turning gear to perform a meshing operation; and when the second meshing completion signal is received from the turning gear, determine that the turning gear is successfully commissioned; the third value is less than the second value.

[0114] In one embodiment, the above-mentioned commissioning module 10 is specifically used to control the gears of the turning gear to perform meshing operation when the current speed of the steam turbine is determined to be the fourth value and the turning gear speed is the fourth value, and to determine that the turning gear commissioning is successful when the third meshing completion signal is received from the turning gear.

[0115] In one embodiment, the shutdown module 11 is specifically used to control the motor of the turning gear to shut down and perform a shutdown operation when it is determined that the turning gear is in a disengaged state.

[0116] In one embodiment, the shutdown module 11 is specifically used to control the turning locomotive to perform a tripping operation when it is determined that the tripping state of the turning locomotive is not tripped, and to control the motor of the turning locomotive to shut down and perform the shutdown operation of the turning locomotive when a second tripping completion signal is received from the turning locomotive.

[0117] In one embodiment, the above-mentioned turning gear control device further includes:

[0118] The alarm module is used to output fault alarm information on the control panel when a fault signal of the turning gear is detected. Fault signals include turning gear speed deviation, turning gear not engaging within a specified time, low speed after turning gear start, low main shaft speed after turning gear start, overheating of the liquid level coupler in the turning gear, turning gear starting without command, turning gear not disengaged, and turning gear speed probe failure.

[0119] Each module in the aforementioned turning gear control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0120] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a control method for turning a wheel. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0121] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0122] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0123] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0124] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0125] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0126] When the current speed of the steam turbine is determined to be the first value, and the turning gear speed is also the first value, the turning gear is controlled to engage, and the turning gear motor is controlled to start. When the first engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0127] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0128] After the turning gear is put into operation, if the current speed of the turbine is detected to be greater than the current speed of the turning gear, the turning gear is controlled to perform a tripping operation, and the turning gear is confirmed to have successfully tripped upon receiving the first tripping completion signal from the turning gear.

[0129] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0130] When the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value, the motor of the turning gear is started to rotate to the first preset speed. When the second value is determined to drop to the first preset speed, the gear of the turning gear is controlled to engage. When the second engagement completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation. The third value is less than the second value.

[0131] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0132] When the current speed of the steam turbine is determined to be the fourth value, and the turning gear speed is also the fourth value, the gears of the turning gear are controlled to engage. When the third engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0133] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0134] Once it is determined that the turning gear is in the disengaged state, the motor controlling the turning gear is shut down to stop the turning gear operation.

[0135] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0136] If the tripping status of the turning gear is determined to be non-tripping, the turning gear is controlled to perform a tripping operation. Upon receiving the second tripping completion signal from the turning gear, the turning gear motor is controlled to shut down, thus stopping the turning gear.

[0137] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0138] When a fault signal is detected in the turning gear, a fault alarm message is output on the control panel. Fault signals include turning gear speed deviation, turning gear not engaging within a specified time, low speed after turning gear start, low main shaft speed after turning gear start, overheating of the liquid level coupler in the turning gear, turning gear starting without command, turning gear not disengaged, and turning gear speed probe failure.

[0139] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0140] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0141] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0142] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0143] When the current speed of the steam turbine is determined to be the first value, and the turning gear speed is also the first value, the turning gear is controlled to engage, and the turning gear motor is controlled to start. When the first engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0144] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0145] After the turning gear is put into operation, if the current speed of the turbine is detected to be greater than the current speed of the turning gear, the turning gear is controlled to perform a tripping operation, and the turning gear is confirmed to have successfully tripped upon receiving the first tripping completion signal from the turning gear.

[0146] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0147] When the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value, the motor of the turning gear is started to rotate to the first preset speed. When the second value is determined to drop to the first preset speed, the gear of the turning gear is controlled to engage. When the second engagement completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation. The third value is less than the second value.

[0148] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0149] When the current speed of the steam turbine is determined to be the fourth value, and the turning gear speed is also the fourth value, the gears of the turning gear are controlled to engage. When the third engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0150] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0151] Once it is determined that the turning gear is in the disengaged state, the motor controlling the turning gear is shut down to stop the turning gear operation.

[0152] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0153] If the tripping status of the turning gear is determined to be non-tripping, the turning gear is controlled to perform a tripping operation. Upon receiving the second tripping completion signal from the turning gear, the turning gear motor is controlled to shut down, thus stopping the turning gear.

[0154] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0155] When a fault signal is detected in the turning gear, a fault alarm message is output on the control panel. Fault signals include turning gear speed deviation, turning gear not engaging within a specified time, low speed after turning gear start, low main shaft speed after turning gear start, overheating of the liquid level coupler in the turning gear, turning gear starting without command, turning gear not disengaged, and turning gear speed probe failure.

[0156] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0157] Upon receiving the turning gear start command from the turbine main control system, the current turbine speed and turning gear speed are determined, and the turning gear is put into operation based on the current turbine speed and turning gear speed.

[0158] Upon receiving a turning gear shutdown command from the turbine main control system, the system determines the turning gear's disengagement status and controls the turning gear to shut down based on the disengagement status.

[0159] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0160] When the current speed of the steam turbine is determined to be the first value, and the turning gear speed is also the first value, the turning gear is controlled to engage, and the turning gear motor is controlled to start. When the first engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0161] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0162] After the turning gear is put into operation, if the current speed of the turbine is detected to be greater than the current speed of the turning gear, the turning gear is controlled to perform a tripping operation, and the turning gear is confirmed to have successfully tripped upon receiving the first tripping completion signal from the turning gear.

[0163] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0164] When the current speed of the steam turbine is determined to be the second value and the turning gear speed is the third value, the motor of the turning gear is started to rotate to the first preset speed. When the second value is determined to drop to the first preset speed, the gear of the turning gear is controlled to engage. When the second engagement completion signal is received from the turning gear, the turning gear is determined to be successfully put into operation. The third value is less than the second value.

[0165] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0166] When the current speed of the steam turbine is determined to be the fourth value, and the turning gear speed is also the fourth value, the gears of the turning gear are controlled to engage. When the third engagement completion signal is received from the turning gear, the turning gear is confirmed to be successfully put into operation.

[0167] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0168] Once it is determined that the turning gear is in the disengaged state, the motor controlling the turning gear is shut down to stop the turning gear operation.

[0169] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0170] If the tripping status of the turning gear is determined to be non-tripping, the turning gear is controlled to perform a tripping operation. Upon receiving the second tripping completion signal from the turning gear, the turning gear motor is controlled to shut down, thus stopping the turning gear.

[0171] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0172] When a fault signal is detected in the turning gear, a fault alarm message is output on the control panel. Fault signals include turning gear speed deviation, turning gear not engaging within a specified time, low speed after turning gear start, low main shaft speed after turning gear start, overheating of the liquid level coupler in the turning gear, turning gear starting without command, turning gear not disengaged, and turning gear speed probe failure.

[0173] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0174] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0175] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A control method of turning a disc, characterized by, The method comprises: In the case of receiving the disc wheel start instruction sent by the steam turbine main control system, the current speed of the steam turbine and the disc wheel speed are determined; When the current speed of the steam turbine is determined to be a first value, and the disc wheel speed is also the first value, the gear of the disc wheel is controlled to engage, and the motor of the disc wheel is started, and when the first engagement completion signal fed back by the disc wheel is received, it is determined that the disc wheel is successfully put into operation; When the current speed of the steam turbine is determined to be a second value, and the disc wheel speed is a third value, the motor of the disc wheel is started to rotate to a first preset speed, and when the second value is determined to drop to the first preset speed, the gear of the disc wheel is controlled to engage, and when the second engagement completion signal fed back by the disc wheel is received, it is determined that the disc wheel is successfully put into operation; the third value is less than the second value; When the current speed of the steam turbine is determined to be a fourth value, and the disc wheel speed is also the fourth value, the gear of the disc wheel is controlled to engage, and when the third engagement completion signal fed back by the disc wheel is received, it is determined that the disc wheel is successfully put into operation; When the steam turbine is temporarily accelerated and the speed of the steam turbine is greater than the disc wheel speed, the disc wheel is controlled to automatically trip, the disc wheel receives a first tripping completion signal, and when the current speed of the steam turbine is the fourth value, it indicates that the disc wheel needs to disc the steam turbine to accelerate to the expected value again, and in the case that the disc wheel speed is the fourth value, the gear of the disc wheel is controlled to engage, and when the third engagement completion signal fed back by the first gear engagement switch is received, the electromagnetic valve or other switch is controlled to close, and it is determined that the disc wheel is successfully put into operation; After the disc wheel is put into operation, when it is monitored that the current speed of the steam turbine is greater than the current speed of the disc wheel, the disc wheel is controlled to trip, and when the first tripping completion signal fed back by the disc wheel is received, it is determined that the disc wheel is successfully tripped; In the case of receiving the disc wheel shutdown instruction sent by the steam turbine main control system, the tripping state of the disc wheel is determined, and the disc wheel is controlled to shut down according to the tripping state.

2. The control method of turning the disc according to claim 1, characterized by, The control of the disc wheel to shut down according to the tripping state comprises: In the case that the tripping state of the disc wheel is determined to be a tripped state, the motor of the disc wheel is controlled to close for the shutdown operation of the disc wheel.

3. The control method of turning the disc according to claim 1, wherein The control of the disc wheel to shut down according to the tripping state comprises: In the case that the tripping state of the disc wheel is determined to be a non-tripped state, the disc wheel is controlled to trip, and when the second tripping completion signal fed back by the disc wheel is received, the motor of the disc wheel is controlled to close for the shutdown operation of the disc wheel.

4. The control method of turning the disc according to claim 1, wherein The method further comprises: When the failure signal of the turning gear is detected, failure alarm information is output on a control panel; the failure signal includes speed deviation of the turning gear, the turning gear not engaging within a specified time, low speed of the turning gear after starting, low speed of a large shaft of the turning gear after starting, over-temperature of a liquid level coupler in the turning gear, the turning gear starting without an instruction, the turning gear not disengaging in place, and a speed probe fault of the turning gear.

5. A turning gear control system characterized by, The system comprises a turning gear control cabinet, a steam turbine main control system, a turning gear and a steam turbine; the turning gear control cabinet is connected with the steam turbine main control system and the turning gear respectively, and the steam turbine main control system is connected with the steam turbine; A controller in the turning gear control cabinet is configured to execute the control method of the turning gear according to any one of claims 1-4.

6. A turning gear control device for implementing the turning gear control method according to claim 1, characterized by The device comprises: A commissioning module configured to, when receiving a turning gear starting instruction sent by the steam turbine main control system, determine a current speed of the steam turbine and a turning gear speed, and control the turning gear to be commissioned according to the current speed of the steam turbine and the turning gear speed; A shutdown module configured to, when receiving a turning gear shutdown instruction sent by the steam turbine main control system, determine a tripping state of the turning gear, and control the turning gear to be shut down according to the tripping state.

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