CN104808123A - Switchgear partial discharge detecting system - Google Patents
Switchgear partial discharge detecting system Download PDFInfo
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- CN104808123A CN104808123A CN201510215098.7A CN201510215098A CN104808123A CN 104808123 A CN104808123 A CN 104808123A CN 201510215098 A CN201510215098 A CN 201510215098A CN 104808123 A CN104808123 A CN 104808123A
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Abstract
A switchgear partial discharge detecting system is used for accurately detecting and positioning switchgear partial discharge. The technical scheme includes that the switchgear partial discharge detecting system comprises a tablet computer, a data acquisition card, a TEV sensor, an ultrahigh frequency sensor and four ultrasonic sensors, wherein the TEV sensor, the ultrahigh frequency sensor and the ultrasonic sensors are mounted in different positions of the surface of a switchgear, their signal output ends are connected with different input ends of the data acquisition cards, the signal output end of the data acquisition card is connected with the tablet computer, and the tablet computer is connected with an upper computer via a wireless network. By adopting three kinds of sensors complementing each other's advantages, switchgear partial discharge can be monitored jointly, not only can interference generated by onsite complicated surroundings be avoided but detection accuracy is improved. In addition, partial discharge source can be accurately positioned and discharge modes can be accurately identified; detection level of switchgear partial discharge is greatly improved.
Description
Technical field
The present invention relates to a kind of device that accurately can detect partial discharge position and type in high-tension switch cabinet, belong to switching technique field.
Background technology
High-tension switch cabinet is very important electrical equipment in electric system, and its operational reliability directly affects the safety and stablization of whole system.Due to reasons such as manufacturing process, the insulation of high-tension switch cabinet can be aging gradually in operational process, cause partial discharge phenomenon occurs, constantly the spreading and develop of this electric discharge, the deterioration of insulating can be accelerated conversely, thus cause serious accident of power supply, therefore study partial discharge of switchgear detection technique significant to raising power supply reliability.
The method for detection of partial discharge of switch cabinet extensively adopted at present has ultrahigh frequency method (UHF), supercritical ultrasonics technology (AE), transient state ground electric wave method (TEV) etc., and above-mentioned three kinds of methods all can realize not outage detection.Ultrahigh frequency method is ultrahigh frequency (300MHz-3GHz) electromagnetic signal utilizing the electric discharge of sensor local to produce, play a game according to ultrahigh frequency electromagnetic signal and put row detection into, because common undesired signal frequency is all at below 300MHz, therefore the method has comparatively outstanding interference free performance, but because site environment is comparatively complicated, and not yet have the corresponding standard of formulation at present, therefore the method cannot quantize the size of partial discharge quantity.Supercritical ultrasonics technology is that the ultrasound wave (centre frequency is generally 40KHz) produced according to molecule generation sharp impacts in shelf depreciation region detects shelf depreciation, the maximum advantage of the method is not by the interference on electrically, and have station-keeping ability comparatively accurately, but because switch cabinet structure is comparatively complicated, ultrasound wave has decay and catadioptric in communication process, easily causes and fails to judge or judge by accident.When TEV method is by induction shelf depreciation, the transient state voltage-to-ground that produces on the metal safe face of switch cubicle of electromagnetic wave that discharge pulse produces is to detect shelf depreciation, the method can quantize shelf depreciation, but cannot avoid on-the-spot a large amount of electromagnetic interference (EMI), has some limitations.
Method that location for partial discharge of switchgear generally adopts " sound-sound ", because inside switch cabinet insulation system is complicated, ultrasound wave produces decay, and therefore larger positioning error often appears in the method.
In view of said method cuts both ways, be therefore necessary to develop a kind of joint-detection and locating device, to make up existing methods deficiency, realize the accurate detection and positioning of partial discharge of switchgear.
Summary of the invention
The object of the invention is to the drawback for prior art, a kind of partial discharge of switchgear detection system is provided, realize the accurate detection and positioning of partial discharge of switchgear.
Problem of the present invention solves with following technical proposals:
A kind of partial discharge of switchgear detection system, formation comprises panel computer, data collecting card, TEV sensor, uhf sensor and four ultrasonic sensors, described TEV sensor, uhf sensor and four ultrasonic sensors are installed on the different parts on switch cubicle surface respectively, their signal output part connects the different input ends of data collecting card, the signal output part of described data collecting card connects panel computer, and described panel computer is connected with host computer by wireless network.
Above-mentioned partial discharge of switchgear detection system, also comprises TEV signal demodulator amplifier in formation, the ultra-high frequency signal that TEV sensor exports sends into data collecting card through TEV signal demodulator amplifier.
Above-mentioned partial discharge of switchgear detection system, also comprises ultra-high frequency signal detector amplefier in formation, and the ultra-high frequency signal that uhf sensor exports sends into data collecting card through ultra-high frequency signal detector amplefier.
Above-mentioned partial discharge of switchgear detection system, also comprises filter amplifier in formation, and the ultrasonic signal of four ultrasonic sensor outputs sends into the different input ends of data collecting card after filter amplifier process.
Above-mentioned partial discharge of switchgear detection system, four ultrasonic sensors are arranged on four angles place of switch cubicle respectively.
The present invention adopts three kinds of sensors of mutual supplement with each other's advantages to carry out combined monitoring to partial discharge of switchgear, not only effectively can avoid the interference that on-the-spot complex environment produces, improve Detection accuracy, and the accurate identification of the accurate location that can realize Partial Discharge Sources and discharge mode, substantially increase the detection level of partial discharge of switchgear.In general, there is a large amount of Electromagnetic Interference signal harmony interference wave signals at the scene run at switch cubicle, therefore the monitoring method based on these two kinds of physical quantitys is adopted can to exclude the erroneous judgement caused because of background noise, in location, because the determination that traditional " several " method, for shelf depreciation, occurs the moment does not have " acoustic-electric " accurate, and the processing procedure of these signals is comparatively complicated, be difficult to use in detection and localization.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the scheme of installation of four ultrasonic sensors.
In figure, each label is: PD, shelf depreciation point, S1 ~ S4, the first ultrasonic sensor ~ the 4th ultrasonic sensor, U1, data collecting card, U2, panel computer, U3, host computer, LF, filter amplifier, JF1, TEV signal demodulator amplifier, JF2, ultra-high frequency signal detector amplefier, TEV, TEV sensor, GP, uhf sensor.
Embodiment
Referring to Fig. 1, the present invention includes four ultrasonic sensors (i.e. the first ultrasonic sensor S1 ~ the 4th ultrasonic sensor S4), uhf sensor GP, TEV sensor, filter amplifier LF, TEV signal demodulator amplifier JF1, ultra-high frequency signal detector amplefier JF2, data collecting card U1, panel computer U2 and power module U3.
Four ultrasonic sensors are arranged in 4 corners of switch cubicle and are connected (referring to Fig. 2) with filter amplifier LF; Uhf sensor GP is arranged in switch cubicle front window and is connected with ultra-high frequency signal detector amplefier JF2; TEV sensor is arranged on switch cubicle surface and is connected with TEV signal demodulator amplifier JF1.Filter amplifier LF, for receiving the signal of four ultrasonic sensors, by undesired signal elimination wherein, then sends into data collecting card U1 after being amplified by the signal of filtering process; TEV signal demodulator amplifier JF1 and ultra-high frequency signal detector amplefier JF2 is for realizing the detection process to TEV and ultra-high frequency signal, because the frequency of TEV signal and ultra-high frequency signal is excessive, be unfavorable for the process of data collecting card U1, therefore need two detector amplefiers carry out frequency reducing and amplify after send into data collecting card U1 again.
Data collecting card U1 is hyperchannel, high speed synchronous sample card, can select wherein arbitrary passage as ultrasound signal receipt passage, TEV Signal reception passage or ultrahigh frequency receiving cable.
The data that data collecting card U1 collects are connected with panel computer U2 by USB connecting line, and panel computer U2 processes to the received signal.The maximal value t in sound wave computed in advance travel-time in switch cubicle before the test
maxwith minimum value t
min, using the output signal of uhf sensor GP or TEV sensor as trigger pip, calculate the travel-time t of ultrasonic signal, if t
min<t<t
maxthen be judged to be that inside switch cabinet discharges, carry out shelf depreciation location afterwards, and in conjunction with the discharge capacity that TEV sensor measurement obtains, pattern-recognition is carried out to electric discharge type.Described t
maxcan determine according to the size of switch cubicle and the velocity of sound.
The power module of native system adopts rechargeable battery, and power module is powered to panel computer U2 and data collecting card U1, can ensure that native system has longer service time.
Panel computer U2 has warning and wireless data transmission function, can send the alarm bell sound of different loudness, utilize wireless module simultaneously, measurement data is sent to host computer U3 and carries out stored record and printing according to the order of severity of electric discharge.
The course of work of the present invention is as follows:
Ultra-high frequency signal after data collecting card U1 amplifies detection and the ultrasonic signal after filter and amplification gather, and are sent to panel computer U2.Because electromagnetic wave velocity of propagation is in space similar to the light velocity, can think that the moment receiving ultra-high frequency signal is the moment of shelf depreciation generation.Panel computer U2 selects ultra-high frequency signal as timing reference signal, moment of signal is received and uhf sensor GP receives the mistiming of ultra-high frequency signal and equivalent velocity of sound v according to the 4th ultrasonic sensor, calculate the distance of four ultrasonic sensors to Partial Discharge Sources, and then solve the coordinate of Partial Discharge Sources.
The position of uhf sensor GP should be placed in the gap place that cabinet door is connected with cabinet, according to test, because switch cubicle is a metal cabinet, shielding action is had to electromagnetic wave, therefore uhf sensor is placed in the gap place that cabinet door is connected with cabinet, neither hinder the acceptance of signal, the interference of other signals can be avoided again.
The signal that TEV sensor collects imports data collecting card U1 into after detection is amplified; The TEV signal collected is sent in panel computer U2 by data collecting card U1; Panel computer U2 extracts the characteristic quantity of signal, then identifies the type of this shelf depreciation according to the characteristic quantity of signal.
Because each signal how much all can some background noise, the sensor collection of this three types of the present invention be dissimilar signal, and respectively to have superiority, so can learn from other's strong points to offset one's weaknesses.Specifically, TEV sensor and uhf sensor have higher sensitivity, even if there is faint electric discharge also can detect, but the noise of on-the-spot some electromagnetic interference (EMI) sometimes simultaneously, only lean on TEV sensor and uhf sensor to be can not judge whether shelf depreciation occurs, therefore can carry out secondary-confirmation with ultrasonic sensor.In addition, TEV signal and ultra-high frequency signal are the signals of different frequency, the monitoring frequency of TEV signal is relatively low, the monitoring frequency of ultra-high frequency signal is relatively high, for the electric discharge of single, not necessarily all can produce these two kinds of discharge signals, therefore adopt these two kinds of methods can monitor out electric discharge more accurately.Ultrasound wave has certain advantage compared with TEV and ultrahigh frequency in location simultaneously, but because the velocity of sound is starkly lower than electromagnetic velocity of wave, first signal that TEV or ultra-high frequency signal therefore can be utilized to monitor, as the initial time of electric discharge, carries out shelf depreciation point location.
In a word, the present invention can realize detection, the location to partial discharge of switchgear and identify, experiment shows that the present invention has higher discrimination for shelf depreciation, and accurate positioning, effectively reduce the generation of situation of failing to judge, judge by accident, improve the work efficiency of maintenance of electric device.
Claims (5)
1. a partial discharge of switchgear detection system, it is characterized in that, it comprises panel computer (U2), data collecting card (U1), TEV sensor, uhf sensor (GP) and four ultrasonic sensors, described TEV sensor, uhf sensor (GP) and four ultrasonic sensors are installed on the different parts on switch cubicle surface respectively, their signal output part connects the different input ends of data collecting card (U1), the signal output part of described data collecting card (U1) connects panel computer (U2), described panel computer (U2) is connected with host computer (U3) by wireless network.
2. a kind of partial discharge of switchgear detection system according to claim 1, it is characterized in that, also comprise TEV signal demodulator amplifier (JF1) in formation, the ultra-high frequency signal that TEV sensor exports sends into data collecting card (U1) through TEV signal demodulator amplifier (JF1).
3. a kind of partial discharge of switchgear detection system according to claim 1 and 2, it is characterized in that, also comprise ultra-high frequency signal detector amplefier (JF2) in formation, the ultra-high frequency signal that uhf sensor (GP) exports sends into data collecting card (U1) through ultra-high frequency signal detector amplefier (JF2).
4. a kind of partial discharge of switchgear detection system according to claim 3, it is characterized in that, also comprise filter amplifier (LF) in formation, the ultrasonic signal of four ultrasonic sensor outputs sends into the different input ends of data collecting card (U1) after filter amplifier (LF) process.
5. a kind of partial discharge of switchgear detection system according to claim 4, is characterized in that, four ultrasonic sensors are arranged on four angles place of switch cubicle respectively.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203929A (en) * | 2015-09-08 | 2015-12-30 | 武汉大学 | Fixed switch cabinet partial discharge online detection device and method |
| CN105372566A (en) * | 2015-12-04 | 2016-03-02 | 重庆臻远电气有限公司 | Wireless partial discharge signal acquisition apparatus |
| CN108333485A (en) * | 2018-01-25 | 2018-07-27 | 武汉国能测控有限公司 | A kind of partial discharge of switchgear monitoring system |
| CN108427067A (en) * | 2018-06-12 | 2018-08-21 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of partial discharge of switchgear fault detection method, apparatus and system |
| CN111190083A (en) * | 2020-01-13 | 2020-05-22 | 沈阳航空航天大学 | Switch cabinet partial discharge online monitoring system based on FPGA module |
| CN111505455A (en) * | 2020-04-26 | 2020-08-07 | 国家电网有限公司 | High-voltage switch cabinet partial discharge positioning detection system and detection method |
| CN112326035A (en) * | 2020-09-22 | 2021-02-05 | 云南电网有限责任公司昆明供电局 | Method for storing working state data of internal equipment of high-voltage switch cabinet |
| CN112345892A (en) * | 2020-09-21 | 2021-02-09 | 国网河南省电力公司安阳供电公司 | High tension switchgear partial discharge auxiliary detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435922A (en) * | 2011-10-26 | 2012-05-02 | 上海交通大学 | Acoustic-electric combined detection system and positioning method for GIS (Gas Insulated Switchgear) local discharge |
| CN102749557A (en) * | 2012-06-07 | 2012-10-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Partial discharging detecting device of switch cabinet |
| CN202720309U (en) * | 2012-08-01 | 2013-02-06 | 北京博电新力电气股份有限公司 | Detection and positioning system for partial discharging |
| CN103176110A (en) * | 2013-02-01 | 2013-06-26 | 广东电网公司电力科学研究院 | Partial discharge detection test platform of medium-voltage switch cabinet |
| CN103278751A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Partial discharge comprehensive itinerant detector for high voltage electric power equipment |
| CN103558526A (en) * | 2013-11-12 | 2014-02-05 | 国网上海市电力公司 | Method for detection of partial discharge of switch cabinet |
-
2015
- 2015-04-30 CN CN201510215098.7A patent/CN104808123B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435922A (en) * | 2011-10-26 | 2012-05-02 | 上海交通大学 | Acoustic-electric combined detection system and positioning method for GIS (Gas Insulated Switchgear) local discharge |
| CN102749557A (en) * | 2012-06-07 | 2012-10-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Partial discharging detecting device of switch cabinet |
| CN202720309U (en) * | 2012-08-01 | 2013-02-06 | 北京博电新力电气股份有限公司 | Detection and positioning system for partial discharging |
| CN103176110A (en) * | 2013-02-01 | 2013-06-26 | 广东电网公司电力科学研究院 | Partial discharge detection test platform of medium-voltage switch cabinet |
| CN103278751A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Partial discharge comprehensive itinerant detector for high voltage electric power equipment |
| CN103558526A (en) * | 2013-11-12 | 2014-02-05 | 国网上海市电力公司 | Method for detection of partial discharge of switch cabinet |
Non-Patent Citations (3)
| Title |
|---|
| 徐敏骅等: "声电联合技术在局部放电检测中的应用", 《上海电力》 * |
| 李海德: "基于TEV与超声波的高压开关柜局部放电检测方法研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 黄小龙等: "联合测试方法在局部放电检测中的应用", 《供用电》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203929A (en) * | 2015-09-08 | 2015-12-30 | 武汉大学 | Fixed switch cabinet partial discharge online detection device and method |
| CN105203929B (en) * | 2015-09-08 | 2018-02-13 | 武汉大学 | A kind of fixed switching cabinet online detector for partial discharge and method |
| CN105372566A (en) * | 2015-12-04 | 2016-03-02 | 重庆臻远电气有限公司 | Wireless partial discharge signal acquisition apparatus |
| CN105372566B (en) * | 2015-12-04 | 2019-01-08 | 重庆臻远电气有限公司 | wireless local discharge signal acquisition device |
| CN108333485A (en) * | 2018-01-25 | 2018-07-27 | 武汉国能测控有限公司 | A kind of partial discharge of switchgear monitoring system |
| CN108427067A (en) * | 2018-06-12 | 2018-08-21 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of partial discharge of switchgear fault detection method, apparatus and system |
| CN111190083A (en) * | 2020-01-13 | 2020-05-22 | 沈阳航空航天大学 | Switch cabinet partial discharge online monitoring system based on FPGA module |
| CN111505455A (en) * | 2020-04-26 | 2020-08-07 | 国家电网有限公司 | High-voltage switch cabinet partial discharge positioning detection system and detection method |
| CN111505455B (en) * | 2020-04-26 | 2023-03-14 | 国家电网有限公司 | High-voltage switch cabinet partial discharge positioning detection system and detection method |
| CN112345892A (en) * | 2020-09-21 | 2021-02-09 | 国网河南省电力公司安阳供电公司 | High tension switchgear partial discharge auxiliary detection device |
| CN112345892B (en) * | 2020-09-21 | 2024-05-31 | 国网河南省电力公司安阳供电公司 | Auxiliary detection device for partial discharge of high-voltage switch cabinet |
| CN112326035A (en) * | 2020-09-22 | 2021-02-05 | 云南电网有限责任公司昆明供电局 | Method for storing working state data of internal equipment of high-voltage switch cabinet |
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