CN103777124A - Breakdown failure positioning method of GIS on-site voltage withstand test based on vibration test - Google Patents

Breakdown failure positioning method of GIS on-site voltage withstand test based on vibration test Download PDF

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Publication number
CN103777124A
CN103777124A CN201410040706.0A CN201410040706A CN103777124A CN 103777124 A CN103777124 A CN 103777124A CN 201410040706 A CN201410040706 A CN 201410040706A CN 103777124 A CN103777124 A CN 103777124A
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vibration
gis
test
test point
testing
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CN201410040706.0A
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Chinese (zh)
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CN103777124B (en
Inventor
徐鹏
苏勇令
高凯
贺林
倪浩
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国网上海市电力公司
华东电力试验研究院有限公司
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Abstract

The invention relates to a breakdown failure positioning method of a GIS on-site voltage withstand test based on a vibration test. A plurality of vibration sensors are distributed on a GIS outer shell within a test range to carry out monitoring, the vibration signals generated when a GIS breakdown failure occurs are collected, and failure positioning is carried out by comparing the amplitude difference and time difference between monitoring point signals. Compared with the prior art, the breakdown failure positioning method of the GIS on-site voltage withstand test based on the vibration test has the advantages of being high in test accuracy and saving the trouble of large-area detachment examination by achieving failure positioning through the vibration test, thereby effectively improving the on-site construction progress, and meanwhile eliminating quality hidden risks caused by large-area detachment.

Description

The breakdown fault localization method of the GIS On-Site Testing based on vibration-testing
Technical field
The present invention relates to a kind of breakdown fault localization method of GIS On-Site Testing, especially relate to a kind of breakdown fault localization method of the GIS On-Site Testing based on vibration-testing.
Background technology
GIS (Cubicle Gas-Insulated Switchgear) is as a kind of fully closed electrical equipment, comprise multiple elements and bus air chamber, according to relevant criterion requirement, GIS scene completes after installation, should carry out withstand voltage test, with checkout facility manufacture, transportation and installation quality.Once at withstand voltage middle generation breakdown fault, because GIS is fully closed, cannot determine intuitively fault occurrence positions by the mode of eye-observation.And AC extra high voltage 1100kVGIS has, scope is large, bus long, air chamber feature how, if there is no reliable breakdown fault localization method, large-area strip inspection certainly will will be carried out, can affect site operation progress on the one hand, on the other hand multiple air chambers be carried out recovering also can bring again certain hidden danger of quality after strip inspection.Therefore,, in AC extra high voltage 1100kV GIS On-Site Testing process, adopting suitable technological means is necessary as breakdown fault localization method.
Summary of the invention
Object of the present invention is exactly the breakdown fault localization method for a kind of GIS On-Site Testing based on vibration-testing is provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of breakdown fault localization method of the GIS On-Site Testing based on vibration-testing, it is characterized in that, on GIS shell in tested scope, arrange that multiple vibration transducers monitor, vibration signal when gathering GIS breakdown fault and occurring, carries out localization of fault by difference in magnitude and mistiming between the each measuring point signal of comparative analysis.
Specifically comprise the following steps:
1) each position vibration transducer is numbered to n, wherein n=1,2......k;
2) obtain the test point m of vibration signal peak value maximum, its vibration signal peak value is A mMAX;
3) obtain the test point O that vibratory response occurs the earliest, and the crest location that defines this test point is A o, and the moment corresponding this crest location is defined as to time zero t o=0;
4) obtain the absolute value delta t of each test point crest moment with respect to the mistiming in O point crest moment n, after sequence, obtain maximum time difference Δ t fMAX,
5) obtain Vibration propagation time relative value δ tn and the vibration amplitude relative value δ A of each test point n, wherein δ t n=Δ t n/ Δ t fMAX, δ A n=A n/ A mMAX, wherein A nfor the peak value of test point n;
6) obtain the δ A of each test point nxwith δ t nxdifference X n=δ A nx-δ t nx;
7) to X nsort from big to small, two measuring point intervals of sequence front two are region, trouble spot.
Described each position vibration transducer can cover tested GIS.
Compared with prior art, it is high that the present invention has measuring accuracy, realizes localization of fault by vibration-testing, avoided the trouble of large area strip inspection, thereby effectively improved site operation progress, eliminated due to the large area hidden danger of quality bringing that disintegrates simultaneously.
Accompanying drawing explanation
Vibration signal figure when Fig. 1 is GIS breakdown fault;
Fig. 2 is localization of fault process flow diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of breakdown fault localization method of the GIS On-Site Testing based on vibration-testing, on GIS shell in tested scope, arrange that multiple vibration transducers monitor, vibration signal when gathering GIS breakdown fault and occurring, carries out localization of fault by difference in magnitude and mistiming between the each measuring point signal of comparative analysis.Described each position vibration transducer can cover tested GIS.
As shown in Figure 2, the present invention specifically comprises the following steps:
1) each position vibration transducer is numbered to n, wherein n=1,2......k;
2) obtain the test point m of vibration signal peak value maximum, its vibration signal peak value is A mMAX;
3) obtain the test point O that vibratory response occurs the earliest, and the crest location that defines this test point is A o, and the moment corresponding this crest location is defined as to time zero t o=0;
4) obtain the absolute value delta t of each test point crest moment with respect to the mistiming in O point crest moment n, after sequence, obtain maximum time difference Δ t fMAX,
5) obtain the Vibration propagation time relative value δ t of each test point nwith vibration amplitude relative value δ A n, wherein δ t n=Δ t n/ Δ t fMAX, δ A n=A n/ A mMAX, wherein A nfor the peak value of test point n;
6) obtain the δ A of each test point nxwith δ t nxdifference X n=δ A nx-δ t nx;
7) to X nsort from big to small, two measuring point intervals of sequence front two are region, trouble spot.

Claims (3)

1. the breakdown fault localization method of the GIS On-Site Testing based on vibration-testing, it is characterized in that, on GIS shell in tested scope, arrange that multiple vibration transducers monitor, vibration signal when gathering GIS breakdown fault and occurring, carries out localization of fault by difference in magnitude and mistiming between the each measuring point signal of comparative analysis.
2. the breakdown fault localization method of a kind of GIS On-Site Testing based on vibration-testing according to claim 1, is characterized in that, specifically comprises the following steps:
1) each position vibration transducer is numbered to n, wherein n=1,2......k;
2) obtain the test point m of vibration signal peak value maximum, its vibration signal peak value is A mMAX;
3) obtain the test point O that vibratory response occurs the earliest, and the crest location that defines this test point is A o, and the moment corresponding this crest location is defined as to time zero t o=0;
4) obtain the absolute value delta t of each test point crest moment with respect to the mistiming in O point crest moment n, after sequence, obtain maximum time difference Δ t fMAX,
5) obtain the Vibration propagation time relative value δ t of each test point nwith vibration amplitude relative value δ A n, wherein δ t n=Δ t n/ Δ t fMAX, δ A n=A n/ A mMAX, wherein A nfor the peak value of test point n;
6) obtain the δ A of each test point nxwith δ t nxdifference X n=δ A nx-δ tn x;
7) to X nsort from big to small, two measuring point intervals of sequence front two are region, trouble spot.
3. the breakdown fault localization method of a kind of GIS On-Site Testing based on vibration-testing according to claim 2, is characterized in that, described each position vibration transducer can cover tested GIS.
CN201410040706.0A 2014-01-27 2014-01-27 Based on the breakdown fault localization method of the GIS On-Site Testing of vibration-testing Active CN103777124B (en)

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CN104020403A (en) * 2014-06-20 2014-09-03 国家电网公司 Diagnostic system for composite apparatus fault positioning
CN104698354A (en) * 2015-03-13 2015-06-10 西安交通大学 GIL (globalization, internationalization and localization) breakdown discharge positioning detecting system
CN105910695A (en) * 2016-04-14 2016-08-31 沈阳嘉越电力科技有限公司 Detection system and method for GIS mechanical fault vibration
CN105954653A (en) * 2016-04-26 2016-09-21 西安交通大学 GIS on-site voltage withstand test breakdown point locating method and GIS on-site voltage withstand test breakdown point locating system
CN105974276A (en) * 2016-04-25 2016-09-28 西安交通大学 GIS interval delivery withstand voltage test breakdown point locating method
CN110261711A (en) * 2019-08-06 2019-09-20 广东电网有限责任公司 A kind of faulty insulator localization method of GIS multiple-factor joint degradation platform

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CN104020403A (en) * 2014-06-20 2014-09-03 国家电网公司 Diagnostic system for composite apparatus fault positioning
CN104698354A (en) * 2015-03-13 2015-06-10 西安交通大学 GIL (globalization, internationalization and localization) breakdown discharge positioning detecting system
CN105910695A (en) * 2016-04-14 2016-08-31 沈阳嘉越电力科技有限公司 Detection system and method for GIS mechanical fault vibration
CN105974276A (en) * 2016-04-25 2016-09-28 西安交通大学 GIS interval delivery withstand voltage test breakdown point locating method
CN105954653A (en) * 2016-04-26 2016-09-21 西安交通大学 GIS on-site voltage withstand test breakdown point locating method and GIS on-site voltage withstand test breakdown point locating system
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CN110261711A (en) * 2019-08-06 2019-09-20 广东电网有限责任公司 A kind of faulty insulator localization method of GIS multiple-factor joint degradation platform

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