Automatic stop control system for hydropower station under abnormal vibration throw working condition
By designing an automatic shutdown control system in a hydropower station, using signal acquisition sensors and analysis processing devices to collect and analyze vibration and swing signals, and by controlling and executing automatic shutdown commands, the problem of abnormal vibration and swing data in the prior art failing to automatically shut down, and safe and stable operation is improved.
Patent Information
- Application Number
- CN202421943527.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing hydropower station only generates alarm signals when vibration and swing data are abnormal, and fails to perform automatic shutdown control procedures, which poses safety hazards.
An automatic shutdown control system for hydropower stations under abnormal operating conditions of vibration swing degree is designed. Vibration and swing degree signals are collected and analyzed through signal acquisition sensors and signal analysis and processing devices, and the control program is configured for hierarchical processing, and the automatic shutdown command is executed through the on-site control unit and the control execution device.
It realizes automatic shutdown when vibration and swing data are abnormal, improves the safe and stable operation of hydropower station units and avoids potential mechanical and electrical accidents.
Smart Images
Figure CN223018794U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of control systems for hydropower station unit equipment, and particularly relates to an automatic shutdown control system under abnormal vibration and swing conditions of a hydropower station. Background Technique
[0002] Vibration and swing data are key indicators reflecting the operating state of a hydro-generating unit. Among them, data such as support cover vibration, upper frame vibration, stator base vibration, stator core vibration, water guide swing, and upper guide swing can indirectly reflect whether the hydro-generating unit (hereinafter referred to as the unit) is normal. When the measured values of the above data exceed the standard, there may be major hidden dangers in the unit, and situations such as unit instability or mechanical and electrical accidents may occur, endangering the safe and stable operation of the unit. When the unit monitoring system detects abnormal vibration and swing data, it will generate an alarm signal to prompt the on-duty monitoring personnel, and the on-duty personnel will then contact the relevant maintenance department for inspection and handling.
[0003] Currently, when the vibration and swing data of a hydropower station are abnormal, only an alarm signal is generated, and no automatic shutdown control process is executed. According to the relevant regulations of "Basic Technical Conditions for Automation Components (Devices) and Their Systems of Hydro-generating Units" (GB / T 11805-2019), when the measured values of unit vibration and swing are too large and exceed the allowable range, the unit should execute an emergency shutdown process to perform automatic shutdown to avoid greater harm. In the traditional control method, no control process configuration is carried out for the situation where the measured values of vibration and swing data are too large, and the degree of attention is insufficient. No automatic shutdown control process and corresponding automatic shutdown control device are configured. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an automatic shutdown control system under abnormal vibration and swing conditions of a hydropower station. Through the setting of signal acquisition sensors and signal analysis and processing devices, front-end signal acquisition and analysis and processing are realized. The local control unit sends instructions to the control execution device according to the analysis results to control the unit equipment to execute commands such as opening the circuit breaker and energizing the emergency shutdown solenoid valve. To achieve the above technical features, the purpose of the utility model is realized as follows:
[0005] An automatic shutdown control system under abnormal vibration and swing conditions of a hydropower station includes signal acquisition sensors, signal analysis and processing devices, and control execution devices;
[0006] The signal acquisition sensors are used to collect vibration signals of the support cover, upper frame, stator base, and stator core, upper guide swing, and water guide swing signals;
[0007] The input end of the signal analysis and processing device is connected to the output end of the signal acquisition sensor, and is used to collect and analyze and process the signals collected by the signal acquisition sensor;
[0008] The input end of the control execution device is connected to the output end of the local control unit of the hydropower station unit. The input end of the local control unit is connected to the output end of the signal analysis and processing device. The control execution device is used to control the hydropower station unit equipment to perform a shutdown operation.
[0009] It further includes a monitoring and operating device, which is respectively connected to the signal acquisition sensor and the local control unit.
[0010] A control program is configured in the signal analysis and processing device to classify the measured values of the vibration and swing signals, and distinguish normal signals, alarm signals, and abnormal over-large shutdown signals.
[0011] The signal acquisition sensor includes vibration sensors and swing sensors respectively installed on the support cover, upper frame, stator base, stator core, water guide, and upper guide. The installation positions of the vibration sensors include horizontal in the X direction, horizontal in the Y direction, vertical in the X direction, and vertical in the Y direction. The installation positions of the swing sensors include the X direction and the Y direction.
[0012] The utility model includes a signal acquisition sensor, a signal analysis and processing device, and a control execution device. The signal acquisition sensor is used to acquire the vibration signals of the support cover, upper frame, stator base, and stator core, the upper guide swing, and the water guide swing signals. The input end of the signal analysis and processing device is connected to the output end of the signal acquisition sensor, and is used to collect and analyze the signals acquired by the signal acquisition sensor. The input end of the control execution device is connected to the output end of the local control unit of the hydropower station unit, and the input end of the local control unit is connected to the output end of the signal analysis and processing device. The control execution device is used to control the hydropower station unit equipment to perform a shutdown operation. Through the setting of the signal acquisition sensor and the signal analysis and processing device, the front-end signal acquisition and analysis are realized, and the analysis result is sent to the local control unit. Among them, a vibration and swing abnormal over-large accident shutdown process is configured in the local control unit. When the accident shutdown process is satisfied, the local control unit sends a signal to the control execution device to control the unit equipment to execute commands such as opening the circuit breaker and energizing the emergency shutdown solenoid valve. Description of the Drawings
[0013] The present utility model will be further described below with reference to the drawings and embodiments.
[0014] Figure 1 It is a schematic diagram of an automatic shutdown control system for abnormal vibration and swing conditions of a hydropower station provided by an embodiment of the present utility model;
[0015] Figure 2 It is a working flowchart of an automatic shutdown control system for abnormal vibration and swing conditions of a hydropower station provided by an embodiment of the present utility model; Detailed Embodiments
[0016] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.
[0017] Referring to the attached Figure 1-2 , in order to achieve the above technical features, the object of the present utility model is achieved as follows:
[0018] An automatic shutdown control system under abnormal vibration and swing conditions of a hydropower station includes a signal acquisition sensor, a signal analysis and processing device, and a control execution device; the signal acquisition sensor is used to collect vibration signals of the support cover, upper frame, stator base, and stator core, upper guide swing, and water guide swing signals; the input end of the signal analysis and processing device is connected to the output end of the signal acquisition sensor, and is used to collect and analyze the signals collected by the signal acquisition sensor; the input end of the control execution device is connected to the output end of the local control unit of the hydropower station unit, the input end of the local control unit is connected to the output end of the signal analysis and processing device, and the control execution device is used to control the hydropower station unit equipment to execute a shutdown action.
[0019] Through the settings of the signal acquisition sensor and the signal analysis and processing device, the present utility model realizes front-end signal acquisition and analysis and processing, and sends the analysis and processing results to the local control unit. Among them, an accident shutdown process for abnormal excessive vibration and swing is configured in the local control unit; when the accident shutdown process is met, the local control unit sends a signal to the control execution device to control the unit equipment to execute commands such as opening the circuit breaker and energizing the emergency shutdown solenoid valve.
[0020] It further includes a monitoring and operation device, which is respectively connected to the signal acquisition sensor and the local control unit, so as to realize the human-computer interaction between the system of the present application and the operation and monitoring personnel, provide a monitoring interface and an operation interface for the operation personnel, and the operation personnel complete the monitoring and operation of the operation conditions of the entire system through the monitoring and operation device.
[0021] A control program is configured in the signal analysis and processing device to classify the measured values of the vibration and swing signals, and distinguish normal signals, alarm signals, and abnormal excessive shutdown signals. Through the configured program, the alarm limit values and abnormal over-standard shutdown limit values of the measured values of the vibration and swing sensor signals are set, and a relay for outputting alarm signals and abnormal over-standard shutdown signals is configured in the signal analysis and processing device. When the measured values of the vibration and swing signals exceed the set limit values, the corresponding output relay is excited and the corresponding signals are sent to the local control unit.
[0022] The signal acquisition sensor includes vibration sensors and swing sensors respectively installed on the support cover, upper frame, stator base, stator core, water guide, and upper guide. The installation positions of the vibration sensors include horizontal in the X direction, horizontal in the Y direction, vertical in the X direction, and vertical in the Y direction. The installation positions of the swing sensors include the X direction and the Y direction.
[0023] Furthermore, the signal analysis and processing device includes a signal acquisition module, a central control processor, a power supply, an output relay, a communication device, a human-machine interface, etc. The signal analysis and processing device collects sensor signals through the signal acquisition module, processes and analyzes the signals through the central control processor, outputs alarm and shutdown signals through the output relay, accesses the information in the signal processing device to the central control room through the communication device, realizes the maintenance and debugging of the device by maintenance personnel through the human-machine interface, and the power supply powers the entire device.
[0024] Furthermore, the signal acquisition sensor is directly connected to the signal analysis and processing device by a cable. The signal analysis and processing device powers the front-end sensor, and the front-end sensor accesses the collected signals to the analysis and processing device through the cable. The signal analysis and processing device is connected to the monitoring and operation device in the central control room through the communication device, and the connection part is a communication medium such as optical fiber and network cable. The human-machine interface is used for maintenance personnel to carry out work such as debugging, maintenance, and inspection.
[0025] Furthermore, after receiving the alarm and shutdown signals output by the signal analysis and processing device, the local control unit is processed by the controller in the local control unit, and the automatic shutdown process control is carried out through the output relay and the control loop to operate the execution device. The local control unit consists of a series of devices such as a controller, an I / O module, a power supply, an output relay, a control loop, and an execution device. The alarm and shutdown signals output by the signal analysis and processing device are connected to the I / O module. The controller outputs control signals through the preset control program, and completes the control of the control execution device through the output relay and the control loop, and completes the automatic shutdown process in the case of excessive abnormal vibration and swing. The local control unit plays a connecting role. It receives the alarm and shutdown signals connected by the signal acquisition and analysis processing device from below and sends them to the monitoring and operation device in the central control room; it receives the commands input by the monitoring and operation device from above and operates the execution device according to the commands to complete the operation instructions of the monitoring and operation device in the central control room. The local control unit is directly connected to the control execution device by a cable, and the connection medium is the cable core wire. The local control unit is directly connected to the signal analysis and processing device by a cable to receive relevant alarm and shutdown signals. In the local control unit, through the configuration program, when receiving the alarm signal sent by the signal analysis and processing device, the local control unit sends out an alarm signal and feedbacks it to the operation monitoring screen personnel through the monitoring and operation device. When receiving the shutdown signal sent by the signal analysis and processing device, the local control unit sends out an alarm signal and feedbacks it to the operation monitoring screen personnel through the monitoring and operation device, and at the same time starts timing. When the timing time ends, if the shutdown signal still exists, it enters the automatic shutdown process to control the unit to automatically shut down.
Claims
1. An automatic shutdown control system for a hydropower station under abnormal vibration swing conditions, characterized in that: It includes a signal acquisition sensor, a signal analysis and processing device, and a control execution device; The signal acquisition sensor is used to collect vibration signals, upper guide swing, and water guide swing signals of the support cover, upper frame, stator base, and stator core; The input end of the signal analysis and processing device is connected to the output end of the signal acquisition sensor, and is used to collect and analyze the signals collected by the signal acquisition sensor; The input end of the control execution device is connected to the output end of the local control unit of the hydropower station unit, and the input end of the local control unit is connected to the output end of the signal analysis and processing device. The control execution device is used to control the hydropower station unit equipment to execute the shutdown action.
2. According to claim 1, the automatic shutdown control system for a hydropower station under abnormal vibration swing conditions is characterized in that: It also includes a monitoring and operating device, which is connected to the signal acquisition sensor and the on-site control unit respectively.
3. The automatic shutdown control system for a hydropower station under abnormal vibration swing conditions according to claim 2 is characterized in that: The signal acquisition sensor includes a vibration sensor and a swing sensor respectively installed on the support cover, the upper frame, the stator base, the stator core, the water guide, and the upper guide. The installation positions of the vibration sensor include horizontal in the X direction, horizontal in the Y direction, vertical in the X direction, and vertical in the Y direction. The installation positions of the swing sensor include the X direction and the Y direction.