CN101873011A - Intelligent on-line monitoring system of high-voltage switch - Google Patents
Intelligent on-line monitoring system of high-voltage switch Download PDFInfo
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- CN101873011A CN101873011A CN201010233067A CN201010233067A CN101873011A CN 101873011 A CN101873011 A CN 101873011A CN 201010233067 A CN201010233067 A CN 201010233067A CN 201010233067 A CN201010233067 A CN 201010233067A CN 101873011 A CN101873011 A CN 101873011A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention provides an intelligent on-line monitoring system of a high-voltage switch, which comprises a sensor unit, a data acquisition unit, a central processing unit and a communication unit which are connected in sequence through a backboard bus, wherein the sensor unit is used for converting the acquired information quantity into a voltage signal; the data acquisition unit is used for converting the voltage signal into a digital signal; the central processing unit is used for compiling and processing the digital signal and comparing the processed digital signal with the preset criterion to obtain state evaluation or alarm of the high-voltage switch; and the filed data result acquired by the communication unit is transmitted to a monitoring system of an upper computer through an optical fiber Ethernet. The system can realize the real-time judgment of an operation field of a circuit breaker; the judgment results include a normal operation state, an early warning state and a fault repair state; and in addition, the system can transmit the early warning state to a remote terminal and a monitoring center and realize the real-time on-line monitoring.
Description
Technical field
The present invention relates to the high-voltage switch gear monitoring technique, relate in particular to a kind of intelligent on-line monitoring system of high-voltage switch, belong to the high-voltage intelligent technical field of electric appliances.
Background technology
Sharp increase along with China's power load, and the large span of China supply and demand position, the ultra-high-tension power transmission line of national grid and transmission of electricity grade all further promote in recent years, make the demand sharp increase of primary cut-out equipment, and the stable operation to primary cut-out simultaneously also improves thereupon.Primary cut-out is one of visual plant in the electric power system; play control and protection dual role; its running status directly affects the operation stability and the power supply reliability of electric power system; break down or can cause power grid accident or expansion accident during accident when it, cause the loss of sizable economy and other aspect.
In the prior art, also relate to the high-voltage switch gear monitoring technique is carried out improved open source literature, for example application number is the application for a patent for invention " monitoring system for high-voltage switch gears " of 200610140319.X, a kind of method that is used for measuring the contact abrasion of electric switch device that involved is, described electric switch device comprises the rated current path with rated current contact system and has the consumable pick-up current path of consumable contact system, contact Δ T overlapping time between the separation that resistance when separated changes the separation of measuring described rated current contact and the contact of described consumable from the contact of described rated current and described consumable, and determine the abrasion of described consumable contact from it, described method is characterised in that: A) always distribute first electric current and second electric current from the electric current of presenting of measuring current source, B) described first electric current transmitted described switching device, and described second electric current and described switching device transmit in parallel, and C) utilize measuring system to detect described second electric current, from determine described overlapping time of Δ T as the change of described second electric current of the function of time.Yet the shortcoming that this invention exists is: this invention mainly provides the method and apparatus of the contact abrasion in the electric switch device, and its function is comparatively single, and the technological means complexity that adopts, and restricted application is unfavorable for applying.
And for example application number is 200610016964.0 patent of invention " real-time monitoring system for temp pressure of high voltage switch hydraulic operation mechanism box of converting station ", relate to a kind of real-time monitoring system for temp pressure of high voltage switch hydraulic operation mechanism box of converting station, it comprises remote computer, communications adapter is connected successively with industrial bus, be characterized in: at high voltage switch hydraulic operation mechanism case built-in on-site supervision device and connected heater, the on-site supervision device is connected on the industrial bus, the on-site supervision device has body, the built-in control circuit of body by host circuit respectively with testing circuit, display driver circuit, analog-to-digital conversion and temperature sensor circuit, the data communication transmission circuit, the Drive and Control Circuit composition that is connected with pressure signal acquisition process circuit; Heater has housing, is provided with on housing into and out of the air port, is built-in with heater and axial flow blower at housing, and axial flow blower is located at the lower end of heater.Can realize temperature, pressure on-line monitoring and the control of high voltage switch hydraulic operation mechanism case.Yet, the shortcoming that this invention exists is: the real-time monitoring system for temp pressure of high voltage switch hydraulic operation mechanism box of converting station of this invention mainly is that the temperature of high voltage switch hydraulic operation mechanism case, pressure are carried out on-line monitoring and control, its function is more single, the technological means complexity that adopts is unfavorable for applying.
There is serious deficiency in the planning system of " periodic maintenance " that China adopts at present,, blindly maintenance or because of overhaul improper cause maintenance accident superfluous as provisional maintenance deficiency, maintenance.The repair based on condition of component that relies on equipment condition monitoring, is based upon on the equipment running status basis is a repair based on condition of component system of working as prescience, primary cut-out is carried out on-line monitoring research, to improving the required level of service of circuit breaker, realize the repair based on condition of component of circuit breaker, have important economic implications and technical meaning.The present invention is directed to the maintenance present situation of China's circuit breaker, is target with the status monitoring of primary cut-out, develops a kind of intelligent on-line monitoring system of high-voltage switch.
Summary of the invention
Technical problem to be solved by this invention is: solve in the prior art the effective monitoring of primary cut-out shortage, and provide a kind of intelligent on-line monitoring system of high-voltage switch, monitoring capability to primary cut-out is provided, realize giving warning in advance and Fault Identification of circuit breaker, really reach comprehensive grasp circuit breaker ruuning situation, guarantee power grid operation.
The technical solution adopted in the present invention is: a kind of intelligent on-line monitoring system of high-voltage switch, it is characterized in that, comprise sensor unit, data acquisition unit, CPU and communication unit, its annexation is that sensor unit, data acquisition unit, CPU and communication unit are connected successively by core bus; Sensor unit mainly comprises displacement transducer, current sensor, vibrating sensor, pressure sensor, temperature sensor and electric field probe; Data acquisition unit mainly is made up of filter circuit, modulate circuit, discharge circuit and high-precision adc; By data acquisition unit, CPU and communication unit, sensor unit is converted into voltage signal with the amount of information that collects, data acquisition unit is converted to digital signal with voltage signal, CPU compiles and handles digital signal, compare with predefined criterion, draw the state estimation or the warning of high-voltage switch gear, the on-site supervision data result that obtains is passed to the supervisory control system of host computer by fiber optic Ethernet by communication unit.The technique effect that brings thus is at least: native system can be realized the on-the-spot real-time judge of circuit breaker operation, judged result is that normal operating condition, alert status and fault are reported state for repairment, and alert status sent to remote terminal and Surveillance center, realize the circuit breaker real time and on line monitoring.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: by the detection of current sensor unit, by analysis and the calculating to current detection signal, can realize the assessment to the tap life-span of switch.The technique effect that brings thus is at least: make this intelligent on-line monitoring system of high-voltage switch have the function in monitoring tap life-span.
Aforesaid intelligent on-line monitoring system of high-voltage switch, it is characterized in that: by the detection of shock sensor, displacement transducer, draw oscillating curve, the divide-shut brake moment and stroke curve, can realize assessment and fault alarm the breaker operation mechanism running status of switch.The technique effect that brings thus is at least: make this intelligent on-line monitoring system of high-voltage switch have the assessment of monitoring breaker operation mechanism running status and the function of fault alarm.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: by the detection of pressure sensor, temperature sensor, can realize assessment and fault alarm to the inner SF6 gaseous state of circuit breaker of switch.The technique effect that brings thus is at least: make this intelligent on-line monitoring system of high-voltage switch have the assessment of the inner SF6 gaseous state of circuit breaker of pilot switch and the function of fault alarm.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: by the detection of electric field probe, can realize assessment and fault alarm to the vacuum circuit-breaker inner vacuum state of switch.The technique effect that brings thus is at least: make this intelligent on-line monitoring system of high-voltage switch have the assessment of vacuum circuit-breaker inner vacuum state of pilot switch and the function of fault alarm.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: data acquisition unit adopts the board plug type structural design.The technique effect that brings thus is at least: the convenient expansion and the replacing parts, adopt the plug-in structure, and be convenient to keep in repair and safeguard.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: CPU adopts arm processor S3C44B0X.The technique effect that brings thus is at least: owing to adopted dynamical processor, make this online monitoring system have data-handling capacity and result of use preferably.
Aforesaid intelligent on-line monitoring system of high-voltage switch is characterized in that: communication unit adopts fiber optic Ethernet.The technique effect that brings thus is at least: utilize Ethernet transmission data fast, the characteristics that bandwidth is high can be guaranteed the information data real-time Transmission.
The invention has the beneficial effects as follows: the amount of information that adopts data acquisition unit, CPU and communication unit, sensor unit that each circuit breaker is paid close attention to is converted into voltage signal, data acquisition unit is converted to digital signal with voltage signal, CPU will compile and handle digital signal, compare with predefined criterion, draw the state estimation or the warning of circuit breaker; Native system also passes to the on-site supervision data result that obtains the supervisory control system of host computer simultaneously by fiber optic Ethernet.Native system can be realized the on-the-spot real-time judge of circuit breaker operation, and judged result is that normal operating condition, alert status and fault are reported state for repairment, and alert status is sent to remote terminal and Surveillance center, realizes the circuit breaker real time and on line monitoring.
Description of drawings
Fig. 1 is the principle schematic of the intelligent on-line monitoring system of high-voltage switch of the embodiment of the invention;
Fig. 2 is the structural representation of the intelligent on-line monitoring system of high-voltage switch of the embodiment of the invention;
Fig. 3 is the schematic diagram of data acquisition unit among Fig. 1;
Fig. 4 is the schematic diagram of communication unit among Fig. 1;
Fig. 5 is the schematic diagram of the CPU among Fig. 1;
Fig. 6 is the principle schematic of the embodiment of the invention 1.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The explanation of mark among Fig. 1: 1-sensor unit, 2-data acquisition unit, 3-CPU, 4-communication unit.
The explanation of mark among Fig. 2: the 5-power panel, second of 6-is core bus, 7-liquid crystal display, 8-LED lamp.
The explanation of mark among Fig. 3: 9-voltage changer, 10-filter circuit, 11-modulate circuit, 12-discharge circuit, 13-high-precision adc.
As shown in Figure 1, intelligent on-line monitoring system of high-voltage switch of the present invention comprises sensor unit 1, data acquisition unit 2, CPU 3 and communication unit 4, and its annexation is that sensor unit 1, data acquisition unit 2, CPU 3 and communication unit 4 are connected successively.
As shown in Figure 2, that provide is the concrete structure figure of native system, by core bus data acquisition unit, CPU, communication unit, power subsystem is connected successively.
As shown in Figure 3, the data acquisition unit of intelligent on-line monitoring system of high-voltage switch of the present invention part mainly is made up of filter circuit 10, modulate circuit 11, discharge circuit 12 and high-precision adc 13.The voltage that filter circuit 10 collects flat-plate type broad frequency sensor 9 carries out giving modulate circuit 11 after the Filtering Processing, 11 pairs of voltages that send of modulate circuit carry out giving discharge circuit 12 after the de-noising and amplify, at last amplifying signal is given analog to digital converter 13 and changed, the digital quantity after the conversion is by interrupting giving processing module 3.This acquisition module 2 adopts the board plug type structural design, and connected mode is that core bus connects.
As shown in Figure 4, the schematic diagram of communication unit; Embodiment of the invention intelligent on-line monitoring system of high-voltage switch requires to have high-speed data communication ability and antijamming capability.Ethernet communication has 10M bit or 100M bit adaptive communications ability at present, and Optical Fiber Transmission has good antijamming capability.Therefore, adopt the fiber optic Ethernet communication mode to strengthen the antijamming capability and the high-speed communication ability of native system.Multiple communication modes and today of depositing in electric power system, press for a kind of current standard that has high speed transmission abilities, has unified transformat, under various countries Utilities Electric Co. and institute promote international standard IEC61850, make ethernet communication become the standard (IEEE 802.3) of communication network in the electric power system; Therefore, with IEEE 802.3 standards as the external main communication format of native system.The ethernet communication of embodiment of the invention controller system adopts the Realtek third generation Fast Ethernet control chip RTL8019 of company, it supports Ethernet II and IEEE802.3 standard, embedded 16Kbit SRAM, can realize that on twisted-pair feeder 10Mbps transmits and receive data simultaneously by Ethernet switch, have 16 position datawire interfaces and 20 bit address line interfaces, support 8 or 16 s' data pattern, support wire jumper and two kinds of patterns of wire jumper free, support the interrupt requests of 8 circuits, support 3 kinds of reference power supply " shut " mode"s.The ethernet communication circuit theory diagrams that the RTL8019 chip constitutes, as shown in Figure 4.Adopt wire jumper working method (I/O and the interruption that are network interface card are determined by wire jumper); The JP pin connects high level, selects 16 bit data bus; The S3C44B0X processor is controlled and is also realized reading of data by register address and storage address that 5 address wire A0～A4 selects RTL8019; The pin of indication network card status is connected to Green/RedLED, is convenient to intuitive judgment ethernet communication state; (PSD4235G2) controls the chip selection signal of RTL8019 by programmable logic device.RTL8019 can be connected with coaxial cable with twisted-pair feeder, the utility model embodiment adopts twisted-pair feeder to connect, interface adopts RJ45, and RTL8019 can not directly export, and also must have a network transformer 20F001N to carry out level conversion in the middle of RJ-45 interface and RTL8019.20F001N is a twisted-pair feeder driving/receiving device, and there are two transmission transformers inside, with two couples of differential signal TPIN of RTL8019 ± and TPOUT ± carry out laggard line output of conversion or input.Communication unit is main interface with Fast Ethernet, has powerful communication capacity.Communication mode adopts industry ethernet, has guaranteed traffic rate, can make up the on-line monitoring of many circuit breakers easily, and guarantee real time of data transmission.
As shown in Figure 5, the processing module of embodiment of the invention intelligent on-line monitoring system of high-voltage switch is to adopt arm processor S3C44B0X.Processing module mainly by active crystal oscillator, button input setting, clock chip, E2PROM, house dog, form by LCDs, gate, warning LED lamp.Clock chip adopts DS1307, adopts the I2C bus to be connected to S3C44B0X; Gate is used programming device GAL20V8B chip; Bleed off electrical storage and adopt E2PROM.
Fig. 6 is the embodiment of the invention 1 principle schematic.In the transformer station or power plant inner high voltage circuit breaker is carried out on-line monitoring, because native system adopts the Ethernet transmission means, insert high-speed port by optical fiber, strengthen antijamming capability and high-speed communication ability, the monitor staff can inquire about and obtain by the visit master system the circuit-breaker status data.It is extremely convenient that the Optical Fiber Transmission access way makes that the on-line monitoring of structure substation breakers becomes, and lays the first stone for realizing the inner unattended operation of transformer station.By increasing a station server, industrial computer and large screen display in the Surveillance center in transformer station or in the power plant, get final product the change procedure of real-time each critical component of display monitoring scope inner high voltage circuit breaker, make things convenient for the operations staff in time to grasp the running status of primary cut-out.
Claims (8)
1. intelligent on-line monitoring system of high-voltage switch, it is characterized in that, comprise sensor unit, data acquisition unit, CPU and communication unit, its annexation is that sensor unit, data acquisition unit, CPU and communication unit are connected successively by core bus; Sensor unit mainly comprises displacement transducer, current sensor, vibrating sensor, pressure sensor, temperature sensor and electric field probe; Data acquisition unit mainly is made up of filter circuit, modulate circuit, discharge circuit and high-precision adc; By data acquisition unit, CPU and communication unit, sensor unit is converted into voltage signal with the amount of information that collects, data acquisition unit is converted to digital signal with voltage signal, CPU compiles and handles digital signal, compare with predefined criterion, draw the state estimation or the warning of high-voltage switch gear, the on-site supervision data result that obtains is passed to the supervisory control system of host computer by fiber optic Ethernet by communication unit.
2. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: by the detection of current sensor unit, by analysis and the calculating to current detection signal, can realize the assessment to the tap life-span of switch.
3. intelligent on-line monitoring system of high-voltage switch according to claim 1, it is characterized in that: by the detection of shock sensor, displacement transducer, draw oscillating curve, the divide-shut brake moment and stroke curve, can realize assessment and fault alarm the breaker operation mechanism running status of switch.
4. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: by the detection of pressure sensor, temperature sensor, can realize assessment and fault alarm to the inner SF6 gaseous state of circuit breaker of switch.
5. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: by the detection of electric field probe, can realize assessment and fault alarm to the vacuum circuit-breaker inner vacuum state of switch.
6. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: data acquisition unit adopts the board plug type structural design.
7. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: CPU adopts arm processor S3C44B0X.
8. intelligent on-line monitoring system of high-voltage switch according to claim 1 is characterized in that: communication unit adopts fiber optic Ethernet.
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Cited By (17)
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|---|---|---|---|---|
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508076A (en) * | 2011-11-09 | 2012-06-20 | 东北大学 | Fault diagnosis device and method based on multi-agent system and wavelet analysis |
| CN103176021A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Data acquisition device for bus structure |
| CN103197233A (en) * | 2012-12-18 | 2013-07-10 | 辽宁省电力有限公司检修分公司 | High-voltage switch opening and closing time online monitor and high-voltage switch opening and closing time online monitoring method |
| CN103199623A (en) * | 2013-03-26 | 2013-07-10 | 国家电网公司 | Transformer substation state monitoring system |
| CN103675668A (en) * | 2013-12-18 | 2014-03-26 | 国家电网公司 | State monitoring system of high-voltage breaker |
| CN104198932A (en) * | 2014-08-18 | 2014-12-10 | 江苏科技大学 | High voltage circuit breaker machinery property online monitoring system and fault diagnosis method |
| CN104502841A (en) * | 2015-01-12 | 2015-04-08 | 国网上海市电力公司 | Circuit breaker condition monitoring system |
| CN105891710A (en) * | 2016-06-08 | 2016-08-24 | 上海市南电力（集团）有限公司 | 10kV switchgear online monitoring device and online monitoring method |
| CN106707151A (en) * | 2016-12-15 | 2017-05-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | High-voltage breaker online monitoring system |
| CN106885987A (en) * | 2017-04-13 | 2017-06-23 | 国网宁夏电力公司吴忠供电公司 | A kind of high voltage isolator on-line monitoring system based on modal analysis method |
| CN109116221A (en) * | 2018-05-04 | 2019-01-01 | 东莞市统益塑料机械制造有限公司 | A kind of Multi-band switch detection device |
| CN113391203A (en) * | 2021-07-07 | 2021-09-14 | 国家电网有限公司 | Detection system for bad closing state of isolating switch |
| CN114184368A (en) * | 2021-12-03 | 2022-03-15 | 国家电网有限公司 | Built-in hydraulic transmission infrared distance and speed measuring device and evaluation method |
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
| CN116742794A (en) * | 2023-04-28 | 2023-09-12 | 北京国电通网络技术有限公司 | Intelligent monitoring equipment and method for closed type jet type fuse |
| CN117872113A (en) * | 2023-12-29 | 2024-04-12 | 广东电网有限责任公司江门供电局 | Sampling system suitable for fault diagnosis of high-voltage circuit breaker |
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| CN102508467B (en) * | 2011-10-18 | 2014-03-12 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508076A (en) * | 2011-11-09 | 2012-06-20 | 东北大学 | Fault diagnosis device and method based on multi-agent system and wavelet analysis |
| CN102508076B (en) * | 2011-11-09 | 2013-09-25 | 东北大学 | Fault diagnosis device and method based on multi-agent system and wavelet analysis |
| CN103176021B (en) * | 2011-12-21 | 2017-04-05 | 北京普源精电科技有限公司 | A kind of bus-structured data acquisition unit |
| CN103176021A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Data acquisition device for bus structure |
| CN103197233A (en) * | 2012-12-18 | 2013-07-10 | 辽宁省电力有限公司检修分公司 | High-voltage switch opening and closing time online monitor and high-voltage switch opening and closing time online monitoring method |
| CN103199623A (en) * | 2013-03-26 | 2013-07-10 | 国家电网公司 | Transformer substation state monitoring system |
| CN103675668A (en) * | 2013-12-18 | 2014-03-26 | 国家电网公司 | State monitoring system of high-voltage breaker |
| CN104198932A (en) * | 2014-08-18 | 2014-12-10 | 江苏科技大学 | High voltage circuit breaker machinery property online monitoring system and fault diagnosis method |
| CN104502841A (en) * | 2015-01-12 | 2015-04-08 | 国网上海市电力公司 | Circuit breaker condition monitoring system |
| CN105891710A (en) * | 2016-06-08 | 2016-08-24 | 上海市南电力（集团）有限公司 | 10kV switchgear online monitoring device and online monitoring method |
| CN106707151A (en) * | 2016-12-15 | 2017-05-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | High-voltage breaker online monitoring system |
| CN106885987A (en) * | 2017-04-13 | 2017-06-23 | 国网宁夏电力公司吴忠供电公司 | A kind of high voltage isolator on-line monitoring system based on modal analysis method |
| CN109116221A (en) * | 2018-05-04 | 2019-01-01 | 东莞市统益塑料机械制造有限公司 | A kind of Multi-band switch detection device |
| CN113391203A (en) * | 2021-07-07 | 2021-09-14 | 国家电网有限公司 | Detection system for bad closing state of isolating switch |
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
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Application publication date: 20101027 |