CN105334432A - GIS partial discharge supersonic wave detection system - Google Patents
GIS partial discharge supersonic wave detection system Download PDFInfo
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- CN105334432A CN105334432A CN201410384228.5A CN201410384228A CN105334432A CN 105334432 A CN105334432 A CN 105334432A CN 201410384228 A CN201410384228 A CN 201410384228A CN 105334432 A CN105334432 A CN 105334432A
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Abstract
The invention relates to a GIS partial discharge supersonic wave detection system in which fiber transmission, supersonic wave detection and digital signal processing technologies are used comprehensively. The system is composed of a supersonic wave sensor, a far-end high-speed collection module, a local module and system software. The system collects supersonic wave signals via supersonic wave probes, the far-end high-speed collection module carries out high speed collection, and electric to optical conversion is carried out at the same time; the far-end module and the local module transmit data by utilizing the fiber transmission technology, and light pulse triggering is utilized to ensure synchronized collection of all far-end modules; and the local module carries out electric to optical conversion on data, electric signals are converted into digital signals, the digital signals are transmitted to a portable computer, and finally the detection software filters, displays, stores and analyzes the data. The system can accurately determine whether partial discharge occurs in the GIS and position the fault position.
Description
Technical field:
The present invention relates to a kind of new gas insulation in combined electric appliance shelf depreciation ultrasonic wave detecting system, integrated use optical fiber transmission technique, ultrasonic detection technology and Digital Signal Processing.The high speed that system application optical fiber transmission technique realizes local discharge of gas-insulator switchgear signal reliably gathers, accurately extracting on the basis of Partial discharge signal, use graphical programming language LabVIEW to develop upper computer software system, adopt UDP communication protocol to realize the communication of upper and lower computer.System can Real-time Collection and stored GIS Processing of Partial Discharge Ultrasonic Signals, and can analyze information such as the time domain of local discharge signal, frequency domain distribution, positions abort situation.
Background technology:
Gas insulated combined electrical equipment (GasInsulatedSwitch-gear, GIS) is due to compact conformation, and adaptive capacity to environment is strong, and high reliability, the application in electric system is increasingly extensive.Along with the development of electrical network scale, the working voltage of GIS improves constantly, and because GIS inner space is limited, the work field intensity of GIS is very high, and insulation margin is relatively little.But GIS can produce the insulation defects such as such as burr, insulator bubble, free metal particle in GIS inside in the processes such as production, assembling, transport and switch motion, these defects can have a strong impact on the Electric Field Distribution of GIS inside, cause electric field distortion, jeopardize the security of operation of equipment.
The load of GIS transformer station supply is mostly urban district important load, once GIS device breaks down, will cause large area, have a power failure for a long time.As can be seen here, Partial Discharge Detection is carried out to GIS, finds timely in early days at insulation fault, generation of preventing accident, significant to guarantee power supply reliability.
At present, the detection method of GIS partial discharge mainly contains the ultrasonic Detection Method etc. in general pulse current method in electric power detection method and ultra-high-frequency detection method, non electrical quantity detection method.Pulse current method be study the earliest, most widely used a kind of detection method for local discharge, be also the detection method that IEC60270 and GB/T7354 standard is recommended.This technology can obtain Apparent discharge magnitude, but anti-interference is poor, and frequency band is narrow, and the quantity of information comprised is few.Ultrahigh frequency method utilizes and is installed in the discharge electromagnetic wave signal that gives off of the inner or outside antenna sensor local of GIS and carries out the determination and analysis of shelf depreciation, and detection sensitivity is high, but cannot realize the demarcation of Apparent discharge magnitude.The ultrasonic signal that ultrasonic Detection Method utilizes the ultrasonic sensor local electric discharge be arranged on GIS device shell to produce, because hyperacoustic wavelength is shorter, directivity is stronger, energy is comparatively concentrated, so ultrasonic Detection Method can realize the accurate location to discharge defect, anti-electromagnetic interference capability is comparatively strong simultaneously, and these advantages make ultrasonic Detection Method become the main method of GIS partial discharge detection.Other detection methods such as chemical measure, the methods such as Infrared Detection Method, are not all widely used because of the limitation of self.
Summary of the invention:
The object of the invention is to propose a kind of local discharge of gas-insulator switchgear ultrasonic wave detecting system and method, measure at GIS housing surface, isolated ground interference is disturbed with spatial electromagnetic, and fast response time, can obtain the Partial discharge signal of high strength.
A kind of local discharge of gas-insulator switchgear ultrasonic wave detecting system, comprises ultrasonic probe, far-end high speed acquisition module, local module and collection analysis software.It is characterized in that:
Ultrasonic signal is gathered by ultrasonic probe, high speed acquisition is carried out through far-end high speed acquisition module, carry out electro-optic conversion remote end module and local module adopts optical fiber transmission technique to carry out data transmission simultaneously, utilize light pulse to trigger and ensure each remote end module synchronous acquisition; After data are carried out opto-electronic conversion by local module, be converted to digital signal by electric signal, be transferred to portable computer by udp protocol, finally by inspection software, filtering, display, storage and analysis are carried out to data.
Described ultrasonic probe adopts piezoceramic transducer, and centre frequency 30kHz, 60dB frequency band range 20 ~ 110kHz, sensitivity peaks is greater than 80dB.
Described far-end high speed acquisition module is by low-power consumption main control module (CPLD), and high-precision adc module, synchronizing pulse demodulation module, data transmission blocks, the peripheral hardwares such as phototiming input port form.Its function is the simulating signal obtaining electric current and voltage from ultrasonic sensor, carries out analog to digital conversion and electro-optic conversion on the spot immediately, the light digital signal after conversion by Optical Fiber Transmission to local module.
Described Optical Fiber Transmission refers to that this cover system remote end module and local module data are therebetween transmitted and adopts Optical Fiber Transmission.Adopt light pulse to trigger and ensure the collection of each far-end high speed acquisition module synchronization, ensure the synchronism of voltage and current signal, convert the weak electric signal of remote end module collection to optical signal transmission on the spot to local module simultaneously.
Described local module is made up of high-performance embedded processor P owerPC, FPGA and other peripheral hardwares.Local module is made up of two parts: a part is signal circuit, and the light digital signal come by Optical Fiber Transmission is converted to electric digital signal, is exported by specified standard stipulations numeral.Another part is laser powered sensor loop, and laser diode sends luminous energy, by Optical Fiber Transmission to far-end high speed acquisition module, through gallium arsenide photoelectric energy conversion device (PPC) power supply to far-end converter.
Described collection analysis software application Virtual instrument LabVIEW software building.Software systems are made up of Partial discharge signal collection and data analysis two parts, and partial discharge signal detection comprises the collection of ultrasound data, communication, effectively extract Processing of Partial Discharge Ultrasonic Signals characteristic quantity, and waveform full storage and discharge signal store; Data analysis comprises the time domain to local discharge signal, and the features such as frequency domain distribution are analyzed, and draws discharge time-phase place, discharge time-discharge capacity, and PHASE DISTRIBUTION (PRPD) etc. analyzes collection of illustrative plates.
Accompanying drawing illustrates:
Fig. 1 is structural principle block diagram of the present invention.
Fig. 2 is far-end high speed acquisition module work schematic diagram of the present invention.
Fig. 3 is local functions of modules interface schema in the present invention.
Fig. 4 is software program flow chart in the present invention.
Embodiment:
The present invention relates to a kind of local discharge of gas-insulator switchgear ultrasonic wave detecting system and method, below in conjunction with specific embodiments and the drawings, the present invention is elaborated, but content not thereby limiting the invention.
A kind of local discharge of gas-insulator switchgear ultrasonic wave detecting system, comprises ultrasonic sensor, far-end high speed acquisition module, local module and system software.
Described ultrasonic sensor adopts piezoelectric transducer, during enforcement, ultrasonic sensor is close to GIS housing surface, in order to make ultrasonic sensor better gather ultrasonic signal, being coated with and spreading a certain amount of couplant, prevent signal attenuation at sensor surface.
Described far-end high speed acquisition module is placed near GIS to be detected, and far-end high speed acquisition module, by the simulating signal of the electric current that obtains from ultrasonic sensor and voltage, is carried out analog to digital conversion and electro-optic conversion on the spot immediately, given local module subsequently by Optical Fiber Transmission.
Optical Fiber Transmission is adopted between described local module and far-end high speed acquisition module, local module can be placed on distance field master-control room far away, the insulating property utilizing optical fiber good make to realize good isolation between checkout equipment and high-tension apparatus, ensure that the safety of survey crew, avoid superpotential and realize security protection.The light digital signal come by Optical Fiber Transmission is converted to electric digital signal by local module, is exported, power to far-end converter simultaneously through gallium arsenide photoelectric energy conversion device (PPC) by specified standard stipulations numeral.
Described system software is developed by Virtual Instrument Language, during System Implementation, by this system software, can the time domain waveform of real-time monitored local discharge signal, and carry out frequency-domain analysis and corresponding spectrogram is drawn, for failure judgement type provides foundation and basis.
Claims (4)
1. a local discharge of gas-insulator switchgear ultrasonic wave detecting system, is characterized in that comprising ultrasonic sensor, far-end high speed acquisition module, Optical Fiber Transmission, local module and system software.
2. the peripheral hardwares such as described in, far-end high speed acquisition module is by low-power consumption main control module (CPLD), high-precision adc module, synchronizing pulse demodulation module, data transmission blocks, phototiming input port form, and far-end high speed acquisition module is placed near Devices to test.
3. Optical Fiber Transmission described in refers to that this cover system remote end module and local module data are therebetween transmitted and adopts Optical Fiber Transmission, adopt light pulse to trigger and ensure the collection of each far-end high speed acquisition module synchronization, ensure the synchronism of voltage and current signal, convert the weak electric signal of remote end module collection to optical signal transmission on the spot to local module simultaneously.
4. local module described in is made up of high-performance embedded processor P owerPC, FPGA and other peripheral hardwares, local module is made up of two parts: a part is signal circuit, the light digital signal come by Optical Fiber Transmission is converted to electric digital signal, exported by specified standard stipulations numeral, another part is laser powered sensor loop, laser diode sends luminous energy, by Optical Fiber Transmission to far-end high speed acquisition module, through gallium arsenide photoelectric energy conversion device (PPC) power supply to far-end converter.
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| CN201410384228.5A CN105334432A (en) | 2014-08-07 | 2014-08-07 | GIS partial discharge supersonic wave detection system |
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| CN201410384228.5A CN105334432A (en) | 2014-08-07 | 2014-08-07 | GIS partial discharge supersonic wave detection system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093715A (en) * | 2016-03-17 | 2016-11-09 | 国网江西省电力科学研究院 | Source location device and localization method are put in a kind of electrical equipment office |
| CN106932698A (en) * | 2017-04-26 | 2017-07-07 | 三峡大学 | A kind of livewire work device of transmission line composite insulator defects detection |
| CN113092965A (en) * | 2021-04-09 | 2021-07-09 | 华北电力大学（保定） | Converter valve equipment defect partial discharge detection device based on microphone array |
| CN113567815A (en) * | 2021-07-21 | 2021-10-29 | 西安交通大学 | Flexible piezoelectric ultrasonic sensing system for monitoring partial discharge of power equipment |
| CN114062835A (en) * | 2021-10-11 | 2022-02-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Laser-powered GIL breakdown fault positioning system and method |
-
2014
- 2014-08-07 CN CN201410384228.5A patent/CN105334432A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093715A (en) * | 2016-03-17 | 2016-11-09 | 国网江西省电力科学研究院 | Source location device and localization method are put in a kind of electrical equipment office |
| CN106093715B (en) * | 2016-03-17 | 2018-11-27 | 国网江西省电力科学研究院 | A kind of electrical equipment partial discharge source positioning device and localization method |
| CN106932698A (en) * | 2017-04-26 | 2017-07-07 | 三峡大学 | A kind of livewire work device of transmission line composite insulator defects detection |
| CN113092965A (en) * | 2021-04-09 | 2021-07-09 | 华北电力大学（保定） | Converter valve equipment defect partial discharge detection device based on microphone array |
| CN113567815A (en) * | 2021-07-21 | 2021-10-29 | 西安交通大学 | Flexible piezoelectric ultrasonic sensing system for monitoring partial discharge of power equipment |
| CN114062835A (en) * | 2021-10-11 | 2022-02-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Laser-powered GIL breakdown fault positioning system and method |
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Application publication date: 20160217 |
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