CN102507397A - Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS - Google Patents
Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS Download PDFInfo
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- CN102507397A CN102507397A CN2011103724904A CN201110372490A CN102507397A CN 102507397 A CN102507397 A CN 102507397A CN 2011103724904 A CN2011103724904 A CN 2011103724904A CN 201110372490 A CN201110372490 A CN 201110372490A CN 102507397 A CN102507397 A CN 102507397A
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Abstract
The invention provides an acousto-electric jointed direct current detection method for metal electric conductive particles in GIS includes steps as follows: [1] utilizing the characteristic that metal electric conductive particles (11) inside equipment (8) jump easily under the direct current voltage generated by a direct current generator device (1), and applying direct current voltage to GIS so as to detect and find the electric conductive particle (11) pollution inside the equipment (8), wherein the diameters of the metal electric conductive particles (11) are smaller than 5mm; and [2] confirming the strength differences of ultrasonic signals and ultrahigh frequency signals of the particles in static and moving states, and further performing jointed detection to the metal electric conductive particles (11) inside GIS (2). The invention has the remarkable advantages of higher mobility, particle determination effectiveness, simplification of practical application in the field, conveniences for operation, etc.
Description
Technical field
The present invention relates to the acoustoelectric combined DC detection method of a kind of power equipment interior metal electrically conductive particles field, be particularly useful for the equipment of not dismantling the GIS metallic conducting particle detect technical field.
Background technology
Mostly GIS is metal shell in the electric system, but owing to reasons such as a variety of causes for example assembles, transportation, operational process arc erosion cause having some metallic conducting particles in the metal inner cavity, yet these particulates are for being filled with hyperbar SF
6The GIS operation of gas is great threat.SF
6Gas is comparatively responsive for metal tip, causes GIS electric field intensity concentration of local, is easy to reduce withstand voltage level, is the main potential safety hazard of GIS.
The further requirement of As GIS miniaturization and high reliability, there is increasing threat in the metallic conducting particle in the GIS to equipment operation, and therefore the detection for metallic conducting particle is the important subject in present international high voltage field.Method commonly used has ultrasonic detection method, ultrahigh frequency method and pulse current method etc.But these methods each have the method characteristics of itself, because pulse current method must have tangible earth point, are filled with SF then
6The GIS class GIS of gas does not usually have obvious earth point, and this method must have directly in equipment and be electrically connected, and do directly to have influence on the GIS safe operation like this, so this method usable range is limited.GIS need not to dismantle GIS, equipment need not to have a power failure and directly be not electrically connected with electric main equipment and detect for supercritical ultrasonics technology and ultrahigh frequency, so these two kinds of methods have good advantage and effect for some important GIS class GIS.
Based on above situation, the present invention proposes a kind ofly GIS is carried out off-line to apply DC voltage, adopts the method for acoustoelectric combined detection metallic conducting particle.
Summary of the invention
The metallic conducting particle that the objective of the invention is to consider the generation of power equipment long-time running process is easily to actual conditions such as safe and stable operation threaten; Propose the method for detecting of metallic conducting particle in the GIS of a kind of combining ultrasonic and ultrahigh frequency detection method, realize fast, accurately, detect easily GIS interior metal electrically conductive particles.
The present invention realizes through following technical proposal.
The acoustoelectric combined direct current method for detecting of metallic conducting particle in a kind of GIS, characteristic of the present invention is:
1) DC voltage that utilizes the dc generator device to produce makes the characteristic of the easy take-off of metallic conducting particle of device interior, GIS is applied the metallic conducting particle that DC voltage detects with discovering device inside pollute, wherein metallic conducting particle diameter＜5mm;
2) ultrasonic signal through particulate static and motion state of living in confirms with the strength difference of ultra-high frequency signal each other, and joint-detection goes out the metallic conducting particle of GIS inside.
The DC voltage that utilizes the dc generator device to produce makes the characteristic of the easy take-off of metallic conducting particle of device interior; Adopt to exchange GIS and pollute through the metallic conducting particle that applies DC voltage and detect with discovering device inside, the acoustoelectric combined direct current detection device of metallic conducting particle is made up of direct current generating means, GIS to be detected and acoustoelectric signal analytic system; At first, on high-pressure conductor, produce through high-voltage connection at GIS to be detected and can make that the metallic conducting particle end reaches take-off voltage or take-off electric field intensity in the GIS, measure metallic conducting particle simultaneously and be still in ultrahigh frequency and the ultrasonic signal of GIS when inner; Secondly, when metallic conducting particle is kept in motion, obtain ultrasonic signal and ultra-high frequency signal that metallic conducting particle produces in GIS internal motion process; At last, detect the inner metallic conducting particle of GIS through static with the ultrasonic signal of motion state and the strength difference of ultra-high frequency signal;
Further specify content of the present invention below in conjunction with accompanying drawing and instance.
Description of drawings
Fig. 1 is the acoustoelectric combined direct current method for detecting of a metallic conducting particle synoptic diagram;
Fig. 2 is particulate ultrasonic time sequence comparison diagram when static;
Ultrasonic time sequence comparison diagram when Fig. 3 is particle movement;
Fig. 4 is particulate ultra-high frequency signal amplitude statistical graph when static;
Ultra-high frequency signal amplitude statistical graph when Fig. 5 is particle movement.
Label does among Fig. 1,1, the dc generator device; 2, GIS; 3, acoustoelectric signal analytic system; 4, DC source; 5, low-pass filter; 6, electrostatic voltmeter; 7, high-voltage connection; 8, equipment; 9, insulator; 10, high-pressure conductor; 11, metallic conducting particle; 12, uhf sensor; 13, sonac; 14, signal cable; 15, advance signal processor; 16, netting twine; 17, computing machine display interface; 18, earthing device.
Embodiment:
The acoustoelectric combined direct current method for detecting of metallic conducting particle in a kind of GIS, characteristic of the present invention is:
(1) characteristic that the DC voltage that utilizes dc generator device 1 to produce makes the metallic conducting particle 11 easy take-offs that equipment 8 is inner applies DC voltage to GIS and detects metallic conducting particles 11 pollution, the wherein mean particle dia＜5mms inner with discovering device 8;
(2) ultrasonic signal through particulate static and motion state of living in confirms with the strength difference of ultra-high frequency signal each other, and joint-detection goes out the metallic conducting particle 11 of GIS 2 inside;
As shown in Figure 1, this figure has provided the acoustoelectric combined direct current method for detecting of metallic conducting particle synoptic diagram.Shown among the figure at first to produce and be lower than the GIS 2 nominal rating working voltages (GIS of 110kV for example through dc generator device 1; Direct current applies less than 110kV and gets final product); DC voltage will slowly apply, and in case the ultrasonic amplitude intensity with ultra-high frequency signal of close observation is ultrasonic when with amplitude intensity ultra-high frequency signal tangible increase (increases of tens of times of signal amplitudes) being arranged; Just explain that metallic conducting particle 11 is changed to motion state by stationary apparatus, also explains the existence of metallic conducting particle 11.If there is not particulate in GIS inside, the inner ambient noise signal amplitude increasing degree that exists of GIS can't be very big so.
Like Fig. 2, shown in Figure 3, this figure provided particulate static with when motion ultrasonic time sequence comparison diagram.From the time series collection of illustrative plates, can find out the increase of ultrasonic signal amplitude along with DC voltage among the figure, metallic conducting particle 11 states of living in are changed into motion state by stationary state, thereby can tentatively judge and have metallic conducting particle 11 in the GIS cavity.
Like Fig. 4, shown in Figure 5, this figure provided particulate static with when motion ultra-high frequency signal amplitude statistical graph.What show among the figure is the ultra-high frequency signal situation of GIS 2 inside when having metallic conducting particle 11; It is higher to know in a large amount of signal amplitudes statistics collection of illustrative plates from figure before and after the particulate that the ultra-high frequency signal of state changes, thereby associating Fig. 2 can further unite and judges in the GIS and have metallic conducting particle 11.
Claims (1)
1. the acoustoelectric combined direct current method for detecting of metallic conducting particle in the GIS is characterized in that:
1) characteristic that the DC voltage that utilizes dc generator device (1) to produce makes the easy take-off of metallic conducting particle (11) that equipment (8) is inner; GIS is applied the metallic conducting particle (11) that DC voltage detects and discovering device (8) is inner pollute, wherein metallic conducting particle (11) diameter＜5mm;
2) ultrasonic signal through particulate static and motion state of living in confirms with the strength difference of ultra-high frequency signal each other, and joint-detection goes out the metallic conducting particle (11) of GIS (2) inside.
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| CN201110372490.4A CN102507397B (en) | 2011-11-22 | 2011-11-22 | Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS |
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| CN201110372490.4A CN102507397B (en) | 2011-11-22 | 2011-11-22 | Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS |
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Cited By (10)
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| CN102698679A (en) * | 2012-06-26 | 2012-10-03 | 南京航空航天大学 | Method for operating nano matters |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN102955110A (en) * | 2012-11-15 | 2013-03-06 | 云南电力试验研究院（集团）有限公司电力研究院 | Direct current integrated test device for simulation test of insulating state of GIS (Gas Insulated Switchgear) devices |
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
| CN105466818A (en) * | 2015-12-25 | 2016-04-06 | 国家电网公司 | Experimental platform for simulating and monitoring movement condition of metal particles in GIS |
| CN107329059A (en) * | 2017-07-19 | 2017-11-07 | 西安交通大学 | Device and method for detecting superimposed voltage of free conductive particles in GIS |
| CN107390066A (en) * | 2017-08-07 | 2017-11-24 | 中国电力科学研究院 | Judge the method and device of gas-insulated transmission line sprayed coating particle movement state |
| CN108845282A (en) * | 2018-06-25 | 2018-11-20 | 西安交通大学 | Caliberating device and method for the diagnosis of GIS/GIL shelf depreciation |
| CN109444680A (en) * | 2018-10-23 | 2019-03-08 | 国网天津市电力公司 | GIS metal particle extent of injury judgment method |
| CN112881871A (en) * | 2021-01-13 | 2021-06-01 | 国网宁夏电力有限公司电力科学研究院 | Detection method and detection system for metal particles in GIS equipment |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698679A (en) * | 2012-06-26 | 2012-10-03 | 南京航空航天大学 | Method for operating nano matters |
| CN102698679B (en) * | 2012-06-26 | 2014-04-16 | 南京航空航天大学 | Method for operating nano matters |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN102841040B (en) * | 2012-08-23 | 2014-09-17 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN102955110A (en) * | 2012-11-15 | 2013-03-06 | 云南电力试验研究院（集团）有限公司电力研究院 | Direct current integrated test device for simulation test of insulating state of GIS (Gas Insulated Switchgear) devices |
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
| CN105466818A (en) * | 2015-12-25 | 2016-04-06 | 国家电网公司 | Experimental platform for simulating and monitoring movement condition of metal particles in GIS |
| CN105466818B (en) * | 2015-12-25 | 2018-10-30 | 国家电网公司 | The simulation of metal particle moving situation and monitoring experiment porch in a kind of GIS |
| CN107329059A (en) * | 2017-07-19 | 2017-11-07 | 西安交通大学 | Device and method for detecting superimposed voltage of free conductive particles in GIS |
| CN107390066A (en) * | 2017-08-07 | 2017-11-24 | 中国电力科学研究院 | Judge the method and device of gas-insulated transmission line sprayed coating particle movement state |
| CN107390066B (en) * | 2017-08-07 | 2020-09-11 | 中国电力科学研究院 | Method and device for judging motion state of particles of spraying layer of gas-insulated power transmission line |
| CN108845282A (en) * | 2018-06-25 | 2018-11-20 | 西安交通大学 | Caliberating device and method for the diagnosis of GIS/GIL shelf depreciation |
| CN108845282B (en) * | 2018-06-25 | 2020-08-25 | 西安交通大学 | Calibration device and method for GIS/GIL partial discharge diagnosis |
| CN109444680A (en) * | 2018-10-23 | 2019-03-08 | 国网天津市电力公司 | GIS metal particle extent of injury judgment method |
| CN112881871A (en) * | 2021-01-13 | 2021-06-01 | 国网宁夏电力有限公司电力科学研究院 | Detection method and detection system for metal particles in GIS equipment |
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Effective date of registration: 20220624 Address after: 650217 yundian science and Technology Park, No.105, Yunda West Road, economic development zone, Kunming City, Yunnan Province Patentee after: YUNNAN ELECTRIC POWER TEST & RESEARCH INSTITUTE (GROUP) Co.,Ltd. Address before: 650217 Yunnan Kunming Economic and Technological Development Zone Yunda West Road Middle Yundian Science Park Patentee before: YUN NAN ELECTRIC TEST & RESEARCH INSTITUTE GROUP Co.,Ltd. ELECTRIC INSTITUTE |
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