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WO2022007013A1 - Système de surveillance en ligne et de prédiction d'anomalies pour dispositif électrique à haute tension - Google Patents

Système de surveillance en ligne et de prédiction d'anomalies pour dispositif électrique à haute tension Download PDF

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Publication number
WO2022007013A1
WO2022007013A1 PCT/CN2020/104041 CN2020104041W WO2022007013A1 WO 2022007013 A1 WO2022007013 A1 WO 2022007013A1 CN 2020104041 W CN2020104041 W CN 2020104041W WO 2022007013 A1 WO2022007013 A1 WO 2022007013A1
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WIPO (PCT)
Prior art keywords
information
voltage
sensor
online monitoring
monitoring
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Ceased
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PCT/CN2020/104041
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English (en)
Chinese (zh)
Inventor
赵振龙
侯荣涛
林静茹
孟伟南
朱新向
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Nanjing Neunovo Iot Research Institute Co Ltd
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Nanjing Neunovo Iot Research Institute Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network

Definitions

  • the invention relates to the field of on-line monitoring, in particular to an on-line monitoring and fault prediction system for high-voltage electrical equipment.
  • High-voltage electrical equipment with monitoring needs mainly include high-voltage transformers, GIS (gas-insulated fully enclosed combined electrical appliances), high-voltage motors, switch cabinets, etc.
  • GIS gas-insulated fully enclosed combined electrical appliances
  • high-voltage motors high-voltage motors
  • switch cabinets etc.
  • online monitoring systems are currently used to replace manual inspections and real-time fault monitoring of high-voltage electrical equipment.
  • the existing on-line monitoring systems have the following problems: 1) Most of the existing on-line monitoring systems only target a single high-voltage electrical equipment, and judge whether the high-voltage electrical equipment has occurred according to whether a single element in the high-voltage electrical equipment exceeds the set threshold. fault, only based on a single factor cannot guarantee the accuracy of fault judgment; 2) The existing online monitoring system stores information that the user cares about and does not care about, and the information that the user does not care about will increase the storage burden of the system, and cannot meet the user needs.
  • the present invention proposes an on-line monitoring and fault prediction system for high-voltage electrical equipment.
  • Real-time online monitoring of device information the edge computing gateway in the system reduces the information storage burden of the application server, and can directly provide the information that users care about through the application server.
  • the present invention provides the following scheme:
  • An online monitoring and fault prediction system for high-voltage electrical equipment comprising:
  • High-voltage transformer online monitoring station GIS equipment online monitoring station, high-voltage motor online monitoring station and switch cabinet online monitoring station and application server;
  • the high-voltage transformer online monitoring station stores the high-voltage transformer information monitored in real time in an edge computing gateway suitable for high-voltage transformers
  • the GIS equipment online monitoring station stores the real-time monitored GIS device information in the edge suitable for GIS equipment.
  • the high-voltage motor online monitoring station stores the real-time monitored high-voltage motor information in an edge computing gateway suitable for high-voltage motors
  • the switch cabinet online monitoring station stores the real-time monitored switch cabinet information In the edge computing gateway of the switch cabinet;
  • Each edge computing gateway transmits and stores the information monitored within the set time period or the information required by the user in the application server through Ethernet;
  • the user obtains the information stored in the application server through the Internet through the mobile client, or directly displays the information stored in the application server through the monitoring large screen.
  • the application server is a rack server, and its model is NF5466M5;
  • the model of the edge computing gateway is IG902-H.
  • the high-voltage transformer online monitoring station includes:
  • the infrared thermal imager is installed at a position higher than the high-voltage transformer and 2-5 meters away from the high-voltage transformer;
  • Dissolved gas monitoring device in oil, iron core grounding current monitoring device, partial discharge monitoring device, transformer vibration monitoring device, fiber grating temperature measurement device, and edge computing gateway for high-voltage transformers are all installed 2-5 meters away from high-voltage transformers. In the switch cabinet on the ground;
  • the edge computing gateway suitable for high-voltage transformers is electrically connected to the infrared thermal imager, the oil-dissolved gas monitoring device, the iron core grounding current monitoring device, the partial discharge monitoring device, the transformer vibration monitoring device, and the fiber grating temperature measuring device, and uses It is used to store the real-time monitoring information of the infrared thermal imager and each device, and transmit and store the monitored information within a set time period or the information required by the user to the application server through Ethernet.
  • the GIS equipment online monitoring station includes:
  • Partial discharge monitoring device, SF6 micro-water density monitoring device, SF6 environmental online monitoring device, circuit breaker monitoring device and edge computing gateway suitable for GIS equipment are installed in the switch cabinet 2-5 meters away from the GIS equipment and placed on the ground ;
  • the edge computing gateway suitable for GIS equipment is electrically connected with the partial discharge monitoring device, the SF6 micro-water density monitoring device, the SF6 environment online monitoring device and the circuit breaker monitoring device, and is used to store the information monitored by each device in real time, and The information monitored within the set time period or the information required by the user is transmitted and stored in the application server through the Ethernet.
  • the high-voltage motor online monitoring station includes:
  • the AC electrical quantity measurement device, the motor speed measurement device, the motor vibration measurement device, the temperature and humidity measurement device, and the edge computing gateway suitable for high-voltage motors are installed in the switch cabinet 2-5 meters away from the high-voltage motor and placed on the ground;
  • the edge computing gateway suitable for high-voltage motors is electrically connected to the AC electrical quantity measurement device, the motor speed measurement device, the motor vibration measurement device, and the temperature and humidity measurement device, and is used to store the real-time monitoring information of each device, and to set the device.
  • the information monitored within a certain period of time or the information required by the user is transmitted and stored in the application server through the Ethernet.
  • the switch cabinet online monitoring station includes:
  • Partial discharge monitoring device, fiber grating temperature measurement device and edge computing gateway suitable for switchgear are installed in the switchgear;
  • the edge computing gateway suitable for the switch cabinet is electrically connected to the partial discharge monitoring device and the fiber grating temperature measuring device, and is used to store the information monitored in real time by each device, and to store the monitored information within a set time period or to the user.
  • the required information is transmitted over Ethernet and stored in the application server.
  • the oil-dissolved gas monitoring device is electrically connected to the oil-gas separation device installed in the oil sampling port of the high-voltage transformer, and obtains H 2 , CO, CO 2 , CH in the oil tank of the high-voltage transformer collected by the oil-gas separation device 4.
  • the iron core grounding current monitoring device is electrically connected to an active zero-flux leakage current sensor installed on the iron-core grounding plate of the high-voltage transformer, and acquires grounding leakage current information collected by the active zero-flux leakage current sensor;
  • the partial discharge monitoring device is electrically connected to the ultra-high frequency sensor installed on the outer wall of the oil discharge pipeline directly connected to the oil discharge valve of the high-voltage transformer, and the discharge signal of the high-voltage transformer collected by the ultra-high frequency sensor is obtained. Amplitude, polarity, phase of discharge and number of discharges;
  • the transformer vibration monitoring device is electrically connected to a vibration sensor installed on the outer surface of the high-voltage transformer, and obtains vibration information collected by the vibration sensor;
  • the fiber grating monitoring device is electrically connected with the fiber grating temperature sensor installed on the outer surface of the winding surrounding the iron core in the high-voltage transformer, and obtains the temperature information of the winding collected by the fiber grating temperature sensor;
  • the polarity, discharge phase and discharge times information, the vibration information and the temperature information are real-time monitored information by the high-voltage transformer online monitoring station, and are all stored in the edge computing gateway suitable for high-voltage transformers.
  • the partial discharge monitoring device is electrically connected to the ultra-high frequency sensor installed on the outer wall of the basin insulator of the GIS equipment to obtain the amplitude and polarity of the discharge signal inside the GIS equipment collected by the ultra-high frequency sensor , discharge phase and discharge times information;
  • the SF6 micro-water density monitoring device is electrically connected with the SF6 density relay installed on the outer wall of the fully enclosed metal grounded casing of the GIS equipment, and obtains the density, pressure and temperature information of the SF6 gas collected by the SF6 density relay;
  • At least one high-sensitivity SF6-02 sensor is distributed in the indoor environment where the GIS equipment is located, and the SF6 environment online monitoring device is electrically connected to the high-sensitivity SF6-02 sensor to obtain the high-sensitivity SF6-02 sensor.
  • SF6 gas content and oxygen content information in the indoor air environment where the GIS equipment is installed and collected by the SF6-02 sensor;
  • the circuit breaker monitoring device is electrically connected with a current transformer, a Hall sensor, a vibration sensor and a mechanical characteristic tester installed on the outer wall of the circuit breaker installed in the fully enclosed metal casing of the GIS equipment, and the current transformer, The state information of the circuit breaker collected by the Hall sensor and the vibration sensor, and the mechanical characteristic information of the circuit breaker collected by the mechanical characteristic tester;
  • the mechanical characteristic information is the information monitored in real time by the online monitoring station of the GIS equipment, and is stored in the edge computing gateway suitable for the GIS equipment.
  • the AC electrical quantity measuring device is electrically connected to the voltage sensor and the current sensor installed on the power supply line of the high-voltage motor, and obtains the voltage information collected by the voltage sensor when the high-voltage motor is working and the current sensor collected. Current information when the high-voltage motor is working;
  • the motor speed measuring device is electrically connected with a Hall sensor installed on the bearing of the high-voltage motor, and acquires the speed information of the high-voltage motor when the high-voltage motor is working collected by the Hall sensor;
  • the motor vibration device is electrically connected to the vibration sensor and the acceleration sensor installed on the bearing of the high-voltage motor along the horizontal direction and the vertical direction, and the vibration sensor and the acceleration sensor are collected when the high-voltage motor is working. Vibration frequency information;
  • the motor displacement measuring device is electrically connected with a linear displacement sensor installed on the outer surface of the high-voltage motor and its frame, and the high-voltage motor is relative to the frame of the high-voltage motor when the high-voltage motor collected by the linear displacement sensor is obtained. displacement change information;
  • the temperature and humidity measuring device is electrically connected to at least one temperature and humidity sensor installed on the outer surface of the high-voltage motor, and acquires the temperature and humidity information on the outer surface of the high-voltage motor collected by the temperature and humidity sensor;
  • the voltage information and current information, the rotational speed information, the vibration frequency information, the displacement change information and the temperature and humidity information are real-time monitored information by the high-voltage motor online monitoring station, and are all stored in the applicable in edge computing gateways for high-voltage electric motors.
  • the partial discharge monitoring device is electrically connected with at least one ultra-high frequency sensor installed on the inner wall of the switch cabinet, and acquires the amplitude and polarity of the discharge signal generated inside the switch cabinet when the switch cabinet is in operation and collected by the ultra-high frequency sensor , discharge phase and discharge times information;
  • a fiber grating temperature sensor is installed at the cable joint between circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices in the switch cabinet, and the fiber grating monitoring device is connected to the fiber grating.
  • the temperature sensor is electrically connected to obtain the temperature information on the surface of the circuit breaker, isolating switch, load switch, operating mechanism, transformer and various protection devices collected by the fiber grating temperature sensor;
  • the amplitude, polarity, phase and number of discharge information of the discharge signal and the temperature information of the surface are the real-time monitoring information of the switchgear online monitoring station, which are all stored on the edge of the switchgear suitable for use in the switchgear. in the computing gateway.
  • the present invention discloses the following technical effects:
  • the high-voltage electrical equipment on-line monitoring and fault prediction system provided by the present invention can perform simultaneous real-time on-line monitoring of high-voltage electrical equipment such as high-voltage transformers, GIS equipment, high-voltage motors, and switch cabinets, which solves the problem that existing on-line monitoring systems can only monitor Problems with a single type of high-voltage electrical equipment;
  • the present invention simultaneously monitors various information of the high-voltage transformer online in real time through an infrared thermal imager, a dissolved gas monitoring device in oil, a core grounding current monitoring device, a partial discharge monitoring device, a transformer vibration monitoring device and a fiber grating temperature measuring device; Partial discharge monitoring device, SF6 micro water density monitoring device, SF6 environmental online monitoring device and circuit breaker monitoring device simultaneously monitor various information of GIS equipment online in real time; The motor displacement measurement device and the temperature and humidity measurement device simultaneously monitor various information of the high-voltage motor online in real time; the partial discharge monitoring device and the fiber grating temperature measurement device simultaneously monitor various information of the switch cabinet online in real time; according to the real-time online monitoring of various information The information realizes the online monitoring of high-voltage transformers, GIS equipment, high-voltage motors and switch cabinets respectively;
  • the staff can comprehensively consider the real-time working conditions of high-voltage transformers, GIS equipment, high-voltage motors and switchgear based on various information, and realize real-time comprehensive monitoring of the faults of high-voltage transformers, GIS equipment, high-voltage motors and switchgear based on various information;
  • the edge computing gateway suitable for high-voltage transformers, GIS equipment, high-voltage motors and switch cabinets in the present invention stores all real-time online monitoring information corresponding to high-voltage transformers, GIS equipment, high-voltage motors and switch cabinets respectively;
  • the monitoring information that the user cares about within the set time period extracted from the edge computing gateway is stored; when the user needs to obtain the monitoring information of interest, it can be obtained directly from the application server through the Internet, or directly read from the monitoring screen.
  • the above design not only reduces the storage burden of the application server, but also meets the daily information needs of users.
  • Figure 1 is a schematic structural diagram of an on-line monitoring and fault prediction system for high-voltage electrical equipment
  • Fig. 2 is the structural schematic diagram of the high-voltage transformer online monitoring station
  • Figure 3 is a schematic structural diagram of an online monitoring station for GIS equipment
  • Fig. 4 is the structural schematic diagram of the high-voltage motor online monitoring station
  • Figure 5 is a schematic diagram of the structure of the switch cabinet online monitoring station.
  • the purpose of the present invention is to provide an online monitoring and fault prediction system for high-voltage electrical equipment.
  • the high-voltage electrical equipment online monitoring and fault prediction system includes multiple lower-level online monitoring stations, namely the high-voltage transformer online monitoring station, the GIS equipment online monitoring station, the high-voltage motor online monitoring station and the switch cabinet online monitoring station.
  • the four online monitoring stations are respectively electrically connected to the sensors on the corresponding equipment, collect the information of high-voltage transformers, GIS equipment, high-voltage motors and switch cabinets in real time, and store all the information in the edge computing gateway inside each online monitoring station.
  • the edge computing gateways include edge computing gateways for high-voltage transformers, edge computing gateways for GIS equipment, edge computing gateways for high-voltage motors, and edge computing gateways for switch cabinets.
  • Each edge computing gateway has at least two 100M Ethernet ports, one of which is used for communication with the application server, and the other is electrically connected to the monitoring device in each online monitoring station for obtaining real-time monitoring information.
  • the storage capacity of each edge computing gateway can be determined according to the number of monitoring devices electrically connected to it and the length of time that users want to keep their information.
  • Each edge computing gateway will compare the information monitored in real time with the information set by the user. If the information monitored in real time is different from the information set by the user, the edge computing gateway will send feedback information.
  • the edge computing gateway will extract the information monitored within the set time period or the information required by the user and the feedback information from all the information, transmit it to the application server and store it, and the user can directly obtain the application through the mobile client or the large screen. information in the server.
  • FIG. 1 shows the schematic diagram of the structure of the online monitoring and fault prediction system for high-voltage electrical equipment.
  • the main body of the high-voltage electrical equipment online monitoring and fault prediction system is composed of high-voltage transformer online monitoring station, GIS equipment online monitoring station, high-voltage motor online monitoring station, switch cabinet online monitoring station and application server.
  • the online monitoring station for high-voltage transformers, the online monitoring station for GIS equipment, the online monitoring station for high-voltage motors and the online monitoring station for switch cabinets are similar in shape to cabinets in the style of switch cabinets.
  • each online monitoring station including various monitoring devices is first placed within 2-5 meters of the corresponding monitored equipment, and then each online monitoring station will use the information collected by various monitoring devices in real time.
  • the information monitored within the set time period or the information required by the user and the feedback information of the edge computing gateway are transmitted through the Ethernet and stored in the application server.
  • the user can directly obtain the required information from the application server through the mobile client through the Internet. Or view the information stored in the application server in real time by monitoring the large screen.
  • a firewall is also set between the application server and the Internet, which is used to improve the security of users obtaining information from the application server through the mobile client, reduce the intrusion of the external environment on the information in the application server, and ensure the integrity of the information in the application server. and accuracy.
  • FIG. 2 shows the schematic diagram of the structure of the high-voltage transformer online monitoring station.
  • the online monitoring station for high-voltage transformers includes edge computing gateways suitable for high-voltage transformers, infrared thermal imagers, dissolved gas monitoring devices in oil, iron core grounding current monitoring devices, partial discharge monitoring devices, transformer vibration monitoring devices, and fiber grating temperature measurement devices.
  • the working principle and working method of the infrared thermal imager are conventional in the field, and it needs to be installed at a position higher than the high-voltage transformer and 2-5 meters away from the high-voltage transformer.
  • the structure of the transformer is generally transformer oil tank, iron core and winding.
  • the transformer oil tank is the outer casing of the transformer, which is equipped with iron core and winding, and the transformer oil tank is filled with transformer oil, so that the iron core and winding are immersed in the transformer oil.
  • Transformer oil acts as insulation and heat dissipation.
  • the transformer oil tank also includes an oil sampling port.
  • the oil and gas separation device is installed in the oil sampling port of the transformer oil tank, and the dissolved gas monitoring device in the oil is electrically connected with the oil and gas separation device for real-time monitoring of H 2 , CO, and CO in the transformer oil tank. Composition and content information of CO 2 , CH 4 , C 2 H 2 , C 2 H 4 , C 2 H 6 .
  • the active zero-flux leakage current sensor is placed on the grounding end of the iron core of the transformer, and the iron-core grounding current monitoring device is electrically connected with the active zero-flux leakage current sensor for real-time monitoring of the grounding leakage current information of the transformer iron core.
  • the transformer oil tank has not only an oil sampling port, but also an oil drain valve.
  • the ultra-high frequency sensor is installed on the outer wall of the oil drain pipeline that is directly connected with the oil drain valve, and the ultra-high frequency sensor is electrically connected with the partial discharge monitoring device. , used for real-time monitoring of the amplitude, polarity, phase and number of discharges of the transformer discharge signal.
  • the vibration sensor is installed on the outer surface of the transformer, and the vibration sensor is electrically connected with the transformer vibration monitoring device for real-time monitoring of the vibration information on the outer surface of the transformer.
  • a fiber grating temperature sensor is also installed on the outer surface of the winding surrounding the iron core, and the fiber grating temperature measuring device is electrically connected with the fiber grating temperature sensor to monitor the temperature information of the winding in the transformer in real time.
  • the high-voltage transformer online monitoring station also contains an edge computing gateway suitable for high-voltage transformers.
  • the above devices will first transmit the real-time monitoring information to the edge computing gateway suitable for high-voltage transformers.
  • the edge computing gateway on the high-voltage transformer stores all the information about the transformer monitored in real time.
  • the high-voltage transformer online monitoring station communicates with the application server through Ethernet, and can select the information within the set time period from all the information and transmit it to the application server in real time, or when the user wants to obtain information, he can directly connect to the mobile client and the application server through the Internet. Communication is established between application servers, and the information required by users is obtained directly through the application server in the edge computing gateway suitable for high-voltage transformers.
  • the invention can not only obtain the information of the high-voltage transformer in real time through a plurality of sensors installed in different positions of the high-voltage transformer, it is beneficial to the monitoring of the real-time state and real-time operation of the high-voltage transformer, and realizes the real-time judgment of the fault of the high-voltage transformer.
  • the edge computing gateway suitable for high-voltage transformers in the online monitoring station stores all the real-time monitoring information about high-voltage transformers, and obtains the information of the set time period through the application server or only obtains the information required by the user and the feedback information of the edge computing gateway , which solves the problem that the existing application server needs to store all the information, and the large storage burden affects the life of the system and the convenience of information acquisition.
  • FIG. 3 shows the schematic diagram of the structure of the GIS equipment online monitoring station.
  • the GIS equipment online monitoring station includes edge computing gateways suitable for GIS equipment, partial discharge monitoring devices, SF6 micro-water density monitoring devices, SF6 environmental online monitoring devices and circuit breaker monitoring devices.
  • GIS equipment is the English abbreviation of GAS insulated SWITCHGEAR (gas-insulated fully enclosed combined electrical appliance).
  • the shell is filled with SF6 (sulfur hexafluoride) insulating gas with a certain pressure.
  • GIS equipment is a high-voltage power distribution device.
  • the basin-type insulator is an insulating support for connecting the two air chambers of the GIS equipment.
  • the ultra-high frequency sensor is installed on the outer wall of the basin-type insulator, and the partial discharge monitoring device is electrically connected with the ultra-high frequency sensor for real-time monitoring.
  • the SF6 insulating gas is filled into the fully sealed metal grounded casing. Under the rated pressure of 20°C, the insulating gas has a certain density value. When the temperature changes, although the pressure of the SF6 insulating gas will change with the temperature. The density value of SF6 insulating gas is closely related to whether the GIS equipment can work normally or not. Therefore, it is very important to accurately monitor the density value of SF6 insulating gas in GIS equipment.
  • the SF6 density relay is installed on the outer wall of all closed metal grounding casings of the GIS equipment, and the SF6 environment online monitoring device is electrically connected with the SF6 density relay, so as to monitor the SF6 insulating gas in the GIS equipment in real time through the SF6 density relay. Density, pressure and temperature information.
  • the present invention installs a plurality of high-sensitivity SF6-02 sensors in a distributed manner in an indoor environment where GIS equipment is installed, and electrically connects the SF6 environment online monitoring device with a plurality of high-sensitivity SF6-02 sensors, for passing Real-time monitoring of SF6 insulating gas content and oxygen content information in the indoor air environment where GIS equipment is installed, combined with the density, pressure and temperature information of SF6 insulating gas in GIS equipment monitored by SF6 density relay in real time, to comprehensively judge GIS Leakage of SF6 insulating gas in equipment.
  • the present invention also installs the current transformer, the Hall sensor, the vibration sensor and the mechanical characteristic tester on the outer wall of the circuit breaker in the fully enclosed metal grounded casing of the GIS equipment, and connects the circuit breaker monitoring device with the current transformer.
  • Hall sensor, vibration sensor and mechanical characteristic tester are electrically connected to monitor the status information of the circuit breaker in real time through the current transformer, Hall sensor and vibration sensor, and monitor the mechanical characteristic information of the circuit breaker in real time through the mechanical characteristic tester.
  • the invention can not only obtain the information of the GIS equipment in real time through a plurality of sensors installed in the internal or external environment of the GIS equipment, but also facilitate the monitoring of the real-time state and real-time operation of the GIS equipment, and realize the real-time judgment of the fault of the GIS equipment.
  • the edge computing gateway suitable for GIS equipment in the GIS equipment online monitoring station stores all the real-time monitoring information about the GIS equipment, and obtains the information of the set time period through the application server or only obtains the information required by the user and the edge computing gateway. Feedback information solves the problem that the existing application server needs to store all the information, and the large storage burden affects the life of the system and the convenience of information acquisition.
  • FIG. 4 is a schematic diagram of the structure of the high-voltage motor online monitoring station.
  • the high-voltage motor online monitoring station includes an edge computing gateway suitable for high-voltage motors, an AC electrical quantity measurement device, a motor speed measurement device, a motor vibration measurement device, a motor displacement measurement device, and a temperature and humidity measurement device.
  • the stator, rotor and bearing are the basic components of the high-voltage motor. All three are located in the high-voltage motor housing.
  • the high-voltage motor frame is used to fix the stator and the front and rear covers to support the rotor, and play a role in protection and heat dissipation during the working process of the high-voltage motor. .
  • the working principle of the high-voltage motor is: energizing the stator of the high-voltage motor, generating a rotating magnetic field between the stators, acting on the rotor to form a magneto-electric rotational torque, and driving the shaft of the high-voltage motor to do mechanical motion through the rotor, thereby realizing the conversion of electrical energy to mechanical energy.
  • the present invention installs the voltage sensor and the current sensor on the power supply line of the high-voltage motor, and electrically connects the AC electric quantity measuring device with the voltage sensor and the current sensor for real-time monitoring of the work of the high-voltage motor. voltage information and current information.
  • a Hall sensor is installed on the bearing of the high-voltage motor, and the motor speed measuring device is electrically connected with the Hall sensor, so as to monitor the speed information of the high-voltage motor in real time through the motor speed measuring device.
  • a vibration sensor and an acceleration sensor are respectively installed on the high-voltage motor bearing along the horizontal direction and the vertical direction, and both the vibration sensor and the acceleration sensor are electrically connected to the motor vibration measurement device for real-time monitoring when the high-voltage motor is working. vibration frequency information.
  • the present invention also installs at least one temperature and humidity sensor on the outer surface of the high-voltage motor, and electrically connects the temperature and humidity sensor with the temperature and humidity measuring device for real-time monitoring of the temperature of the outer surface of the high-voltage motor.
  • Humidity information when the high-voltage motor is working, not only the information on the inside or the outer surface of the high-voltage motor itself will change compared to the static state, but also the frame of the high-voltage motor used to fix the stator and support the rotor of the high-voltage motor compared to the static state. .
  • the present invention also installs a linear displacement sensor on the outer surface of the high-voltage motor and its frame, and electrically connects the linear displacement sensor with the motor displacement measuring device for real-time monitoring of the high-voltage motor.
  • the invention can not only obtain the information of the high-voltage motor in real time through a plurality of sensors installed in the high-voltage motor or in the external environment, it is beneficial to the monitoring of the real-time state and real-time operation of the high-voltage motor, and realizes the real-time judgment of the fault of the high-voltage motor.
  • the edge computing gateway suitable for high-voltage motors in the high-voltage motor online monitoring station stores all the real-time monitoring information about the high-voltage motor, and obtains the information of the set time period through the application server or only obtains the information required by the user and the edge computing gateway. Feedback information solves the problem that the existing application server needs to store all the information, and the large storage burden affects the life of the system and the convenience of information acquisition.
  • FIG. 5 is a schematic diagram of the structure of the switchgear online monitoring station.
  • the switchgear online monitoring station includes edge computing gateways suitable for switchgear, partial discharge monitoring devices and fiber grating temperature measurement devices.
  • Switchgear is used to switch, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. Its main structures are circuit breakers, isolation switches, load switches, operating mechanisms, transformers and Various protection devices.
  • at least one ultra-high frequency sensor is installed on the inner wall of the switch cabinet, and the ultra-high frequency sensor is electrically connected with the partial discharge monitoring device, which is used for real-time monitoring of the amplitude, polarity and discharge of the discharge signal generated inside the switch cabinet during operation. phase and discharge count information.
  • the present invention also installs fiber grating temperature sensors at the cable joints between circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices, and connects the fiber grating temperature sensors with the fiber grating monitoring device.
  • the electrical connection is used for real-time monitoring of the temperature information on the surface of the above-mentioned main structure in the switch cabinet.
  • Comprehensive monitoring of switchgear information is realized by synthesizing the amplitude, polarity, discharge phase, discharge times, and temperature information of the main structural surface of the switchgear when the switchgear is in operation.
  • the invention can not only obtain the information of the switch cabinet in real time through a plurality of sensors installed in the switch cabinet, but also facilitate the monitoring of the real-time state and real-time operation of the switch cabinet, and realize the real-time judgment of the fault of the switch cabinet.
  • the edge computing gateway suitable for the switchgear in the monitoring station stores all the real-time monitoring information about the switchgear, and obtains the information of the set time period through the application server or only obtains the information required by the user and the feedback information of the edge computing gateway. It solves the problem that the existing application server needs to store all the information, and the large storage burden affects the life of the system and the convenience of information acquisition.
  • the present invention performs real-time monitoring on high-voltage transformers, GIS equipment, high-voltage motors and switch cabinets. More than one sensor is installed in different positions inside, on the surface or in the external environment of the high-voltage electrical equipment to be measured. By monitoring all the information in the internal, surface or external environment of the high-voltage electrical equipment under test in real time, the working status and operation of the high-voltage electrical equipment under test can be realized. Real-time comprehensive monitoring of the situation and comprehensive fault diagnosis.
  • the present invention is used in the online monitoring station of high-voltage transformers and the online monitoring station of GIS equipment.
  • the high-voltage motor online monitoring station and the switch cabinet online monitoring station are equipped with edge computing gateways suitable for each high-voltage electrical equipment. Its function is to store all the real-time monitoring information of each online monitoring station, and set the time through Ethernet
  • the information in the segment or the information required by the user and the feedback information of the edge computing gateway are transmitted to the application server.
  • the addition of the edge computing gateway makes the information stored in the application server no longer all the information monitored in real time by multiple online monitoring stations, but only a small part of the total information. Users can directly obtain information from the application server through the Internet through the mobile client, or view the information stored in the application server directly through the monitoring large screen.
  • the above arrangement of the present invention not only relieves the information storage pressure of the application server, but also reduces the information storage burden of the application server, and at the same time, through the cooperation of the edge computing gateway and the application server, the user can more conveniently obtain the monitoring information of each high-voltage electrical equipment, and further The accuracy and comprehensiveness of the judgment on the working state and operation of high-voltage electrical equipment have been strengthened.
  • the present invention is electrically connected to each monitoring device in the high-voltage transformer online monitoring station, the GIS equipment online monitoring station, the high-voltage motor online monitoring station, and the switch cabinet online monitoring station, and is located inside, on the surface or inside of each tested high-voltage electrical equipment.
  • the number of sensors in the external environment is at least one, and by increasing the number of sensors, the accuracy of real-time monitoring information corresponding to each measured high-voltage electrical device can be further improved.
  • the number of sensors is not limited, as long as the functions corresponding to the sensors can be implemented, the number of sensors is within the protection scope of the present invention.
  • an online monitoring station for high-voltage transformers an online monitoring station for GIS equipment, an online monitoring station for high-voltage motors, and an online monitoring station for switch cabinets.
  • These online monitoring stations are parallel.
  • the user can select the online monitoring station corresponding to the high-voltage electrical equipment according to the actual needs, establish the communication with the application server through the Ethernet, and complete the real-time comprehensive monitoring and information acquisition of the high-voltage electrical equipment information. Therefore, as long as it is based on one or more of the above-mentioned online monitoring stations, the real-time comprehensive monitoring and information acquisition of high-voltage electrical equipment information are all within the protection scope of the present invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Relating To Insulation (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

Système de surveillance en ligne et de prédiction d'anomalies pour un dispositif électrique à haute tension, le système comprenant une station de surveillance en ligne de transformateurs à haute tension, une station de surveillance en ligne de dispositifs de GIS, une station de surveillance en ligne de moteurs à haute tension, une station de surveillance en ligne d'armoires de commutation et un serveur d'applications. Chaque station de surveillance en ligne mémorise des informations, détectées en temps réel, dans une passerelle périphérique de calcul appropriée pour chaque dispositif électrique à haute tension et la passerelle périphérique de calcul transmet ensuite les informations pendant une durée définie ou des informations nécessaires à un utilisateur d'un serveur d'applications et l'utilisateur peut directement acquérir les informations du serveur d'applications grâce à un client mobile par l'intermédiaire d'Internet ou peut acquérir les informations grâce à un grand écran d'affichage par l'intermédiaire d'Ethernet. Grâce au système, non seulement la charge de mémorisation d'informations d'un serveur d'applications est réduite grâce à une passerelle périphérique de calcul, mais une surveillance complète en temps réel des informations de fonctionnement et des informations d'anomalies de divers dispositifs électriques à haute tension peut également être réalisée et la réponse aux besoins en informations d'un utilisateur peut également s'obtenir.
PCT/CN2020/104041 2020-07-08 2020-07-24 Système de surveillance en ligne et de prédiction d'anomalies pour dispositif électrique à haute tension Ceased WO2022007013A1 (fr)

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