A control system and method for a fixed hoist for opening and closing a maintenance door of a tailrace tunnel of a hydropower station

Abstract

This application discloses a control system and method for a fixed winch used for opening and closing maintenance doors of a hydropower station's tailrace tunnel. The control system includes: a field equipment layer, an autonomous and controllable electrical control layer, and a centralized monitoring and safety monitoring layer. The autonomous and controllable electrical control layer has two winch control subsystems, which are wirelessly connected to fixed winch a and fixed winch b, respectively, to achieve cross-redundant control of the fixed winches. The centralized monitoring and safety monitoring layer includes multiple safety detection units and a centralized intelligent monitoring platform. The multiple safety detection units have several sensors for monitoring the status of equipment related to the maintenance doors of the hydropower station's tailrace tunnel. The multiple safety detection units and the autonomous and controllable electrical control layer are respectively connected to the centralized intelligent monitoring platform, which, based on the monitoring data collected by the multiple safety detection units, completes the control of the field equipment layer through the autonomous and controllable electrical control layer.

Description

Technical Field

[0001] This application belongs to the field of water conservancy and hydropower engineering equipment control technology, and in particular relates to a control system and method for a fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station. Background Technology

[0002] The tailrace tunnel access gates of large hydropower stations are typically enormous in size and weight, and the safety and reliability of their opening and closing equipment—the fixed winch—directly affect the unit's maintenance schedule and power generation efficiency. Currently, many in-service fixed winch electrical control systems suffer from the following prominent problems: Outdated technology and low reliability: The control method of "PLC + resistor cutting" is generally adopted, which has high energy consumption, poor speed regulation performance, large start-stop impact, core controllers face production stoppage, and spare parts procurement is difficult, which does not meet the requirements of "independent controllability".

[0003] Low level of automation: The mechanical lock of the gate requires manual on-site operation, resulting in low intelligence, inefficiency, and safety risks. Lack of safety redundancy: The control system has a simple structure and lacks redundancy. In emergency situations such as external power outages or control system failures, it cannot quickly restore equipment operation, which may lead to serious accidents such as abnormal gate slippage.

[0004] Lack of condition monitoring: The lack of real-time online monitoring of the operating status of key components such as wire ropes, transmission mechanisms, and metal structures is detrimental to the early diagnosis of equipment failures and predictive maintenance. Summary of the Invention

[0005] The purpose of this application is to overcome the problems of the prior art by disclosing a control system and method for a fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station.

[0006] The objective of this application is achieved through the following technical solution: A control system for a fixed winch used for opening and closing maintenance doors of a tailrace tunnel in a hydropower station, the control system of the fixed winch comprising: The system consists of a field equipment layer, an autonomous and controllable electrical control layer, and a centralized monitoring and security monitoring layer. The field equipment layer and the autonomous and controllable electrical control layer together constitute an autonomous and controllable electrical control subsystem. The field equipment layer includes a fixed winch a and a fixed winch b. The autonomous and controllable electronic control layer is equipped with two sets of winch control subsystems, and the two sets of winch control subsystems are wirelessly connected to the fixed winch a and the fixed winch b respectively, so as to realize cross-redundant control of the fixed winch. The centralized monitoring and security monitoring layer includes multiple security detection units and a centralized intelligent monitoring platform; The multiple safety detection unit is equipped with several sensors for monitoring the status of equipment related to the tailrace tunnel maintenance gate of the hydropower station. The multiple safety detection units and the autonomous controllable electronic control layer are respectively connected to the centralized intelligent monitoring platform. The centralized intelligent monitoring platform controls the field equipment layer based on the monitoring data collected by the multiple safety detection units and through the autonomous controllable electronic control layer.

[0007] According to a preferred embodiment, the autonomous and controllable electronic control layer includes PLC controller a, PLC controller b, and variable frequency speed control device a and variable frequency speed control device b. The PLC controller a is connected to the variable frequency speed control device a as a winch control subsystem, and the PLC controller b is connected to the variable frequency speed control device b as a winch control subsystem. The two winch control subsystems are connected to the corresponding control consoles of the fixed winch a and the fixed winch b via wireless connection.

[0008] According to a preferred embodiment, PLC controller a and PLC controller b respectively collect the input and output data of the two fixed winches through distributed I / O substations. The autonomous and controllable electronic control layer is configured such that when a fault is detected in one of the winch control subsystems, another winch control subsystem takes over control of the faulty winch control subsystem. Redundancy switching is triggered by a manual switching command on the console, thereby achieving cross-backup of the winch control subsystems.

[0009] According to a preferred embodiment, the multiple safety detection unit includes a wire rope detection sensor for detecting wire rope damage, a vibration sensor for monitoring the operating status of the motor, reducer and drum, a stress-strain sensor for monitoring the stress and strain of the metal structure, an absolute encoder for measuring the gate lifting height, and a water level sensor for measuring the downstream water level.

[0010] According to a preferred embodiment, the multi-security detection unit further includes a video surveillance and security broadcasting subsystem. The video surveillance and security broadcasting subsystem includes spherical cameras arranged around the equipment room and gate openings, as well as a hard disk recorder and broadcasting equipment installed in the centralized control cockpit, for real-time monitoring of the equipment operating environment and providing security warnings.

[0011] According to a preferred embodiment, the centralized intelligent monitoring platform is located in a centralized control cockpit and includes an industrial computer, a server, and a display unit, used for centralized start-stop control, parameter setting, status monitoring, and data recording of two fixed winches.

[0012] According to a preferred embodiment, the centralized intelligent monitoring platform integrates intelligent gate opening control logic, which can determine the water level between gate sections based on the downstream water level value measured by the water level sensor, and control the fixed winch to run to the corresponding water filling position and then pause, and continue the lifting process after the water filling is completed.

[0013] According to a preferred embodiment, the control system of the stationary winch further includes: an emergency opening and closing subsystem. The emergency opening and closing subsystem includes a movable hydraulic power unit and an emergency operator. The emergency operator can be selectively connected to the motor drive shaft of any fixed winch via a quick connector to provide emergency power in the event of a winch control subsystem failure.

[0014] According to a preferred embodiment, a physical interlock protection device is provided between the emergency start-up and shutdown subsystem and the autonomous controllable electrical control subsystem, so that the emergency start-up and shutdown subsystem does not interfere with the autonomous controllable electrical control subsystem during normal operation, and the power supply of the autonomous controllable electrical control subsystem is isolated during emergency operation.

[0015] On the other hand, this application also discloses: A control method for a fixed winch used for opening and closing maintenance doors of a tailrace tunnel in a hydropower station, based on the aforementioned control system for a fixed winch, the control method comprising: S1. Redundancy control steps: Real-time monitoring of the operating status of the two winch control subsystems. When it is determined that one winch control subsystem has failed, a manual switching command is received to switch the control of the failed winch control subsystem to the other winch control subsystem. S2. Intelligent gate opening procedure: The downstream water level is obtained through the water level sensor, and the water filling process is automatically determined according to the downstream water level. The fixed winch is controlled to lift the gate to the water filling position and pause. After receiving the water filling completion confirmation signal, the fixed winch is controlled to lift the gate to the predetermined height and automatically engage the mechanical lock. S3. Emergency opening and closing procedure: When the main power supply or the autonomous controllable electrical control subsystem fails, the emergency opening and closing subsystem is activated. The hydraulic power unit and the emergency operator are connected to the target fixed winch through quick connectors. The fixed winch is driven by hydraulic power to complete the opening and closing operation of the gate.

[0016] The aforementioned main solution and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application. Those skilled in the art, after understanding the solution of this application, will realize that there are many combinations based on the prior art and common general knowledge, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here.

[0017] The beneficial effects of this application are: This invention, by designing two fixed-winding PLCs, a cross-back function for the variable frequency speed control device, and an independent emergency start-stop subsystem, can quickly switch to a healthy system or activate hydraulic emergency power when the main system fails, significantly improving the reliability of equipment operation and the safety assurance capability under extreme working conditions. This invention integrates a centralized intelligent monitoring platform with multiple safety detection units. It automatically determines the water filling scheme through water level sensors and automatically engages and disengages mechanical locks, realizing an intelligent opening and closing process, reducing manual intervention. It is equipped with full-state perception functions such as wire rope damage detection, vibration and stress monitoring, and combined with video monitoring and safety broadcasting systems, it realizes early warning of faults and real-time monitoring of the operating environment, improving the level of digital management of equipment and operational efficiency. Attached Figure Description

[0018] Figure 1 This is a system block diagram of this application; Figure 2 This is a system block diagram of the autonomous and controllable electronic control subsystem in this application; Figure 3 This is a system block diagram of the multiple security detection units in this application; Figure 4 This is a system block diagram of the emergency start / stop subsystem in this application; Figure 5 This is a system block diagram of the video surveillance and security broadcast subsystem in this application; Among them, 100-Autonomous and controllable electrical control subsystem, 200-Autonomous and controllable electrical control layer, 201-PLC controller a, 202-PLC controller b, 203-Variable frequency speed control device a, 204-Variable frequency speed control device b, 300-Centralized intelligent monitoring platform, 400-Multiple safety detection units, 401-Wire rope detection sensor, 402-Vibration sensor, 403-Stress and strain sensor, 404-Absolute encoder, 405-Water level sensor, 500-Emergency opening and closing subsystem 500, 501-Hydraulic power unit, 502-Emergency operator, 503-Quick connector, 504-Physical interlock protection device, 600-Field equipment layer, 601-Fixed winch a, 602-Fixed winch b, 700-Video monitoring and safety broadcasting subsystem, 701-Spherical camera, 702-Hard disk recorder, 703-Broadcasting equipment. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Furthermore, it should be noted that unless otherwise specified in this application, the specific structures, connections, positions, power sources, etc. involved are all things that a person skilled in the art can know without creative effort based on the prior art.

[0025] Example 1 refer to Figures 1 to 5 As shown in the figure, this embodiment discloses a control system for a fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station, including: an autonomous and controllable electrical control subsystem 100, a centralized monitoring and safety monitoring layer, and an emergency opening and closing subsystem 500.

[0026] Preferably, the autonomous and controllable electrical control subsystem 100 includes a field device layer 600 and an autonomous and controllable electrical control layer 200. The field device layer 600 includes a fixed winch a601 and a fixed winch b602, and the autonomous and controllable electrical control layer 200 includes a PLC controller a201, a PLC controller b202, a variable frequency speed control device a203, and a variable frequency speed control device b204. The variable frequency speed control device a203 and the variable frequency speed control device b204 adopt a rectifier feedback and inverter scheme to realize closed-loop vector control of the hoisting motor.

[0027] The autonomous and controllable electrical control subsystem 100 realizes the drive and basic control of the winch, replacing the traditional PLC + resistor cutting solution, improving energy efficiency and reliability. The field equipment layer 600 includes independent fixed winches a601 and b602, each equipped with 2×110kW motors and mechanical synchronization mechanism, and the double lifting points are connected by a rigid shaft to ensure synchronous lifting of the gate. The independently controllable electrical control layer 200 includes PLC controller a201 and PLC controller b202, which adopts the domestic Huichuan AM500 series PLC, with modular design, supports multi-core processors and redundant communication, program storage space ≥8M, meets GB / T 34068-2017 standard, and realizes control logic operation and instruction issuance; The variable frequency speed control devices a203 and b204 adopt the Hopewind HD2000 series rectifier feedback + inverter solution, realize bidirectional energy flow through IGBT components, support closed-loop vector control, and achieve a speed stability accuracy of ±0.02%, meeting the requirements for low-speed, high-torque start-up.

[0028] When the PLC receives an operation command, it controls the motor via a local handle or a centralized monitoring platform. The speed command signal is sent to the frequency converter via industrial Ethernet. The frequency converter drives the motor to achieve stepless speed regulation from 0.0 to 2.0 m / min. At the same time, it feeds back status data such as current and speed to the PLC. The PLC, in conjunction with the 404 absolute encoder, monitors the gate position in real time to achieve precise stroke control.

[0029] PLC controller a201 is connected to frequency converter a203 as a winch control subsystem, and PLC controller b202 is connected to frequency converter b204 as a winch control subsystem. The two winch control subsystems are connected to the corresponding control consoles of fixed winch a601 and fixed winch b602 via wireless connection.

[0030] The autonomous and controllable electronic control layer 200 is configured to take over the control of the faulty winch control subsystem when a fault is detected in one of the winch control subsystems. The redundancy switching is triggered by the manual switching command on the console, thereby realizing the cross-backup of the winch control subsystems.

[0031] By using two fixed-winding control systems for cross-backup, the problem of the traditional system's single structure and lack of redundancy is solved. The two fixed-winding PLC controllers a201 and b202 collect each other's input and output data through distributed IO substations. The variable frequency speed control devices a203 and b204 support redundant Ethernet communication. Under normal operating conditions, the two winch control subsystems operate independently. When one winch control subsystem fails, the operator can manually trigger a switching command through the control panel, and the other winch control subsystem will take over the control of the failed winch control subsystem, driving its motor and brake to operate.

[0032] Preferably, the centralized monitoring and security monitoring layer includes a centralized intelligent monitoring platform 300 and multiple security detection units 400.

[0033] Centralized Intelligent Monitoring Platform 300: Located in the centralized control cockpit, it includes an industrial computer, server and display unit, and is used for centralized start-stop control, parameter setting, status monitoring and data recording of two fixed rolls.

[0034] Multiple safety detection units 400: Communicating with the centralized intelligent monitoring platform 300, including a wire rope detection sensor 401 for detecting wire rope damage, a vibration sensor 402 for monitoring the operating status of the motor, reducer and drum, a stress-strain sensor 403 for monitoring the stress and strain of the metal structure, an absolute encoder 404 for measuring the gate lifting height, and a water level sensor 405 for measuring the downstream water level.

[0035] The centralized monitoring and security monitoring layer enables intelligent centralized management and full-state monitoring of the two fixed rolls. The centralized intelligent monitoring platform 300 is deployed in the centralized control cockpit, including an industrial server, touch screen, and operator console. It supports remote control and data storage, and automatically determines the water filling scheme based on the downstream water level fed back by the water level sensor 405. When the water level is <275m, the control gate is moved to the second filling level, and water is filled in a single section with a stroke of 150mm. When the water level is ≥275m, it will run to the first water filling level, fill water between the two sections, with a stroke of 300mm, and automatically continue to rise after the water filling is completed; The lifting height, weight, motor temperature, and other parameters are displayed in real time on the touch screen.

[0036] The multiple safety detection unit 400 detects defects such as broken wires and wear through the wire rope detection sensor 401, and the data is uploaded to the platform in real time. When the data exceeds the limit, an audible and visual alarm is triggered. The vibration sensor 402 monitors the vibration of the motor and reducer bearings, and the stress and strain sensor 403 monitors the stress of the frame to prevent structural fatigue damage. The safety interlock protection integrates 18 types of protection functions such as overcurrent, overspeed, and overload.

[0037] Preferably, the emergency opening and closing subsystem 500 includes a movable hydraulic power unit 501 and an emergency operator 502. The emergency operator 502 can be selectively connected to the drive shaft of any fixed-winding motor via a quick connector 503 to provide emergency power when the main electrical control system fails.

[0038] The emergency opening and closing subsystem 500 provides an independent emergency power source to ensure reliable opening and closing of the gate when the main electrical control system fails, such as power outage or PLC failure. It includes a diesel hydraulic power unit 501, an emergency operator 502 and a quick connector 503, which can be manually switched to connect to any fixed-winding motor drive shaft. In an emergency, the physical interlock protection device 504 automatically cuts off the main system power to prevent interference. The hydraulic power drive motor rotates, and the gate descent speed is controlled by the damping system to avoid impact. The control panel is equipped with an emergency stop button and status indicator lights, and supports local manual operation and parameter display.

[0039] The control system of this application is based on an autonomous and controllable, safe and redundant, and intelligent monitoring design structure. It achieves efficient and safe control of two fixed winches through the collaborative work of four core modules: field equipment layer (execution), autonomous and controllable electrical control layer (control), centralized monitoring and safety monitoring layer (management / monitoring), and emergency start-up and shutdown subsystem (ultimate guarantee). The system architecture is based on a layered distributed design, and the modules realize data interaction through industrial Ethernet to ensure the real-time performance and reliability of control commands and status monitoring.

[0040] During cross-redundancy control, the two fixed-roll PLC controllers a201 and b202 collect the input and output data of the two fixed-roll PLCs through the distributed IO substation, and the redundancy switching is triggered by the manual switching command on the operator console. The centralized intelligent monitoring platform 300 integrates intelligent gate opening control logic, which can automatically determine the water level between gate sections based on the downstream water level value measured by the water level sensor 405, and control the fixed roll to stop after it reaches the corresponding water filling position, and continue the lifting process after the water filling is completed.

[0041] The system of this application also includes an automatic locking device for the gate mechanical lock, which is driven by an electrical control system and can realize the automatic engagement and disengagement of the lock beam. It is also equipped with an emergency mechanism that can decouple the lock beam from the drive mechanism for manual operation in case of electrical control system failure. A physical interlock protection device 504 is provided between the emergency opening and closing subsystem 500 and the main electrical control subsystem to ensure that the emergency system does not interfere with the main system during normal operation and that the main system power supply is reliably isolated during emergency operation.

[0042] The system also includes a video surveillance and security broadcasting subsystem 700, which includes spherical cameras 701 arranged around the equipment room and gate openings, as well as a hard disk recorder 702 and broadcasting equipment 703 installed in the centralized control cockpit, for real-time monitoring of the equipment operating environment and providing security warnings.

[0043] Example 2 Based on Embodiment 1, this embodiment also discloses a control method for a fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station. Based on the control system described in Embodiment 1, the control method of this application includes the following steps: S1. Redundancy control steps: Real-time monitoring of the operating status of the two fixed roll control systems. When it is determined that the control system of one fixed roll has failed, a manual switching command is received to switch the control of the failed fixed roll to the health control system of the other fixed roll. S2. Intelligent gate opening procedure: The downstream water level is obtained through the water level sensor, the water filling scheme is automatically determined according to the downstream water level, the fixed roll is controlled to lift the gate to the water filling position and pause, and after receiving the water filling completion confirmation signal, the fixed roll is controlled to lift the gate to the predetermined height and automatically engage the mechanical lock. S3. Emergency opening and closing procedure: When the main power supply or main control system fails, start the emergency opening and closing subsystem, connect the hydraulic power unit and emergency operator to the target fixed roll through quick connectors, operate the emergency control console, and use hydraulic power to drive the fixed roll to complete the opening and closing operation of the gate.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control system for a fixed winch used for opening and closing maintenance doors of a tailrace tunnel in a hydropower station, characterized in that, The control system of the stationary winch includes: The system comprises a field equipment layer (600), an autonomous and controllable electrical control layer (200), and a centralized monitoring and security monitoring layer. The field equipment layer (600) and the autonomous and controllable electrical control layer (200) constitute an autonomous and controllable electrical control subsystem (100). The field equipment layer (600) includes a fixed winch a (601) and a fixed winch b (602). The autonomous controllable electrical control layer (200) is equipped with two winch control subsystems, and the two winch control subsystems are wirelessly connected to the fixed winch a (601) and the fixed winch b (602) respectively, so as to realize cross-redundant control of the fixed winch. The centralized monitoring and security monitoring layer includes multiple security detection units (400) and a centralized intelligent monitoring platform (300). The multiple safety detection unit (400) is equipped with several sensors for monitoring the status of equipment related to the tailrace tunnel maintenance gate of the hydropower station; The multiple safety detection unit (400) and the autonomous controllable electronic control layer (200) are respectively connected to the centralized intelligent monitoring platform (300). The centralized intelligent monitoring platform (300) controls the field equipment layer (600) based on the monitoring data collected by the multiple safety detection unit (400) through the autonomous controllable electronic control layer (200).

2. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 1, characterized in that, The autonomous and controllable electronic control layer (200) includes PLC controller a (201), PLC controller b (202), and variable frequency speed control device a (203) and variable frequency speed control device b (204). The PLC controller a (201) is connected to the variable frequency speed control device a (203) as a winch control subsystem, and the PLC controller b (202) is connected to the variable frequency speed control device b (204) as a winch control subsystem. The two winch control subsystems are connected to the corresponding control consoles of the fixed winch a (601) and the fixed winch b (602) via wireless connection.

3. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 2, characterized in that, The PLC controller a (201) and PLC controller b (202) collect the input and output data of the two fixed winches respectively through the distributed IO substation. The autonomous and controllable electronic control layer (200) is configured to take over the control of the faulty winch control subsystem when a fault is detected in one of the winch control subsystems. The redundancy switching is triggered by the manual switching command on the console, thereby realizing the cross-backup of the winch control subsystems.

4. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 1, characterized in that, The multiple safety detection unit (400) includes a wire rope detection sensor (401) for detecting wire rope damage, a vibration sensor (402) for monitoring the operating status of the motor, reducer and drum, a stress-strain sensor (403) for monitoring the stress and strain of the metal structure, an absolute encoder (404) for measuring the gate lifting height, and a water level sensor (405) for measuring the downstream water level.

5. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 4, characterized in that, The multi-security detection unit (400) also includes a video surveillance and security broadcasting subsystem (700), which includes a spherical camera (701) arranged around the machine room and gate opening, as well as a hard disk recorder (702) and broadcasting equipment (703) installed in the centralized control cockpit, for real-time monitoring of the equipment operating environment and providing security warnings.

6. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 4, characterized in that, The centralized intelligent monitoring platform (300) is located in the centralized control cockpit and includes an industrial computer, a server and a display unit. It is used to centrally control the start and stop of the two fixed winches, set parameters, monitor their status and record data.

7. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 6, characterized in that, The centralized intelligent monitoring platform (300) integrates intelligent gate opening control logic, which can determine the water level between the gate sections based on the downstream water level value measured by the water level sensor (405), and control the fixed winch to run to the corresponding water filling position and then pause, and continue the lifting process after the water filling is completed.

8. The control system for the fixed winch used for opening and closing the maintenance gate of the tailrace tunnel of a hydropower station as described in claim 1, characterized in that, The control system of the stationary winch also includes an emergency opening and closing subsystem (500). The emergency opening and closing subsystem (500) includes a movable hydraulic power unit (501) and an emergency operator (502), which can be selectively connected to the motor drive shaft of any fixed winch via a quick connector (503) to provide emergency power in the event of a winch control subsystem failure.

9. The control system for a fixed winch used for opening and closing the maintenance gate of a tailrace tunnel in a hydropower station as described in claim 8, characterized in that, The emergency start-stop subsystem (500) and the autonomous controllable electronic control subsystem (100) are provided with a physical interlock protection device (504), so that the emergency start-stop subsystem (500) does not interfere with the autonomous controllable electronic control subsystem (100) during normal operation, and the power supply of the autonomous controllable electronic control subsystem (100) is isolated during emergency operation.

10. A control method for a fixed winch used for opening and closing maintenance doors of a tailrace tunnel in a hydropower station, characterized in that, The control system based on any one of claims 1 to 9 for a stationary winch, wherein the control method comprises: S1. Redundancy control steps: Real-time monitoring of the operating status of the two winch control subsystems. When it is determined that one winch control subsystem has failed, a manual switching command is received to switch the control of the failed winch control subsystem to the other winch control subsystem. S2. Intelligent gate opening procedure: The downstream water level is obtained through the water level sensor, and the water filling process is automatically determined according to the downstream water level. The fixed winch is controlled to lift the gate to the water filling position and pause. After receiving the water filling completion confirmation signal, the fixed winch is controlled to lift the gate to the predetermined height and automatically engage the mechanical lock. S3. Emergency opening and closing procedure: When the main power supply or the autonomous controllable electrical control subsystem (100) fails, the emergency opening and closing subsystem (500) is started, and the hydraulic power unit (501) and the emergency operator (502) are connected to the target fixed winch through quick connectors. The fixed winch is driven by hydraulic power to complete the opening and closing operation of the gate.

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