CN102507397B - 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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- CN102507397B CN102507397B CN201110372490.4A CN201110372490A CN102507397B CN 102507397 B CN102507397 B CN 102507397B CN 201110372490 A CN201110372490 A CN 201110372490A CN 102507397 B CN102507397 B CN 102507397B
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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 detaching equipment not GIS metallic conducting particle detect technical field.
Background technology
In electric system, GIS mostly is metal shell, but because the reasons such as a variety of causes for example assembles, transport, operational process arc erosion cause existing in metal inner cavity some metallic conducting particles, but 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.
Along with GIS miniaturization and the further requirement of high reliability, to equipment there is increasing threat in operation to the metallic conducting particle in GIS, is therefore one, field of current international high voltage important subject for the detection of metallic conducting particle.Conventional method has ultrasonic detection method, ultrahigh frequency method and pulse current method etc.But the each own method characteristic of these methods own, because pulse current method must have obvious earth point, is then filled with SF
6the GIS class GIS of gas does not usually have obvious earth point, and the method must have direct electrical connection in equipment, does like this and can directly have influence on GIS safe operation, and therefore the method usable range is limited.And detect GIS without dismantling GIS, equipment without having a power failure and not directly being electrically connected with electric main equipment for supercritical ultrasonics technology and ultrahigh frequency, therefore 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 of GIS is carried out to off-line apply DC voltage, adopts the method for acoustoelectric combined detection metallic conducting particle.
Summary of the invention
The metallic conducting particle that the object of the invention is to consider the generation of power equipment During Process of Long-term Operation 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 to GIS interior metal electrically conductive particles fast, accurately, detect easily.
The present invention realizes by following technical proposal.
An acoustoelectric combined direct current method for detecting for metallic conducting particle in GIS, feature of the present invention is:
1) DC voltage of utilizing DC generator device to produce makes the characteristic of the easy take-off of metallic conducting particle of device interior, GIS is applied to DC voltage and detect with the metallic conducting particle of discovering device inside and pollute, wherein metallic conducting particle diameter < 5mm;
2) mutually confirm by the particulate static and ultrasonic signal of motion state of living in and the strength difference of ultra-high frequency signal, joint-detection goes out the metallic conducting particle of GIS inside.
The DC voltage of utilizing 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 detect with the metallic conducting particle of discovering device inside and pollute by applying DC voltage, the acoustoelectric combined direct current detection device of metallic conducting particle is made up of direct current generating means, detected GIS and acoustoelectric signal analytic system; First, on high-pressure conductor, produce by high-voltage connection at detected GIS and can make metallic conducting particle end in GIS reach take-off voltage or take-off electric field intensity, measure metallic conducting particle simultaneously and be still in ultrahigh frequency and the ultrasonic signal of GIS when inner; Secondly,, in the time that 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; Finally, detect the metallic conducting particle of GIS inside by the static and ultrasonic signal of motion state and the strength difference of ultra-high frequency signal;
Further illustrate content of the present invention below in conjunction with accompanying drawing and example.
Brief description of the drawings
Fig. 1 is the acoustoelectric combined direct current method for detecting of metallic conducting particle schematic 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.
In Fig. 1, label is, 1, 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, Computer display interface; 18, earthing device.
embodiment:
An acoustoelectric combined direct current method for detecting for metallic conducting particle in GIS, feature of the present invention is:
(1) DC voltage of utilizing DC generator device 1 to produce makes the characteristic of the metallic conducting particle 11 easy take-offs of equipment 8 inside, GIS is applied to DC voltage and detect with the metallic conducting particle 11 of discovering device 8 inside and pollute, wherein mean particle dia < 5mm;
(2) mutually confirm by the particulate static and ultrasonic signal of motion state of living in and the strength difference of ultra-high frequency signal, 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 schematic diagram.In figure, show first and produced the 2 nominal rating working voltage (GIS of for example 110kV lower than GIS by DC generator device 1, direct current applies and is less than 110kV), DC voltage will slowly apply, the amplitude intensity of the ultrasonic and ultra-high frequency signal of close observation, there is obvious increase (increase of decades of times signal amplitude) once ultrasonic and amplitude intensity ultra-high frequency signal, just illustrate that metallic conducting particle 11 is changed to motion state by stationary apparatus, also illustrates the existence of metallic conducting particle 11.If GIS inside does not exist particulate, the inner ambient noise signal amplitude increasing degree existing of GIS can't be very large so.
As Fig. 2, shown in Fig. 3, this figure has provided particulate static and when motion ultrasonic time sequence comparison diagram.In figure, from time series collection of illustrative plates, can find out the increase of ultrasonic signal amplitude along with DC voltage, metallic conducting particle 11 status are changed into motion state by stationary state, thereby can tentatively judge and in GIS cavity, have metallic conducting particle 11.
As Fig. 4, shown in Fig. 5, this figure has provided particulate static and when motion ultra-high frequency signal amplitude statistical graph.What in figure, show is the ultra-high frequency signal situations of GIS 2 inside while there is metallic conducting particle 11, from figure, in a large amount of signal amplitudes statistics collection of illustrative plates, can know before and after particulate that the ultra-high frequency signal of state changes higher, thereby associating Fig. 2 can further combine and judges and in GIS, have metallic conducting particle 11.
Claims (1)
1. an acoustoelectric combined direct current method for detecting for metallic conducting particle in GIS, is characterized in that:
1) DC voltage of utilizing DC generator device (1) to produce makes the easily characteristic of take-off of the inner metallic conducting particle (11) of equipment (8), GIS is applied to the metallic conducting particle (11) that DC voltage detects and discovering device (8) is inner and pollute, wherein metallic conducting particle (11) diameter < 5mm;
2) mutually confirm by the particulate static and ultrasonic signal of motion state of living in and the strength difference of ultra-high frequency signal, joint-detection goes out GIS(2) inner metallic conducting particle (11).
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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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| CN102507397A CN102507397A (en) | 2012-06-20 |
| CN102507397B true CN102507397B (en) | 2014-08-27 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102698679B (en) * | 2012-06-26 | 2014-04-16 | 南京航空航天大学 | Method for operating nano matters |
| 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 |
| 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 | The superimposed voltage detection means and method of free conducting particle in a kind of GIS |
| 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 |
| 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 |
| CN112881871B (en) * | 2021-01-13 | 2022-08-23 | 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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| JPH0232274A (en) * | 1988-07-22 | 1990-02-02 | Toshiba Corp | High voltage testing method for gas insulated switching device |
| JPH1169583A (en) * | 1997-08-20 | 1999-03-09 | Toshiba Corp | Device for diagnosing abnormality of equipment |
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| CN102103181A (en) * | 2009-12-17 | 2011-06-22 | 上海莫克电子技术有限公司 | Geographic information system (GIS) on-line local discharge monitoring system |
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| 直流下GIS内运动金属微粒的超声波特性及状态识别;谭向宇等;《高电压技术》;20100228;第36卷(第2期);391-395 * |
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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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