article techcon 2010

8/20/2019 Article TechCon 2010

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Abstract

Between 40 and 50 % failures (CIGRE report) on high voltage circuit breakers and tap changerson high voltage transformers are of mechanical origin.

The vibro-acoustic testing methods applied for both type apparatus have been able to detectnumerous mechanical anomalies.

This article will describe the theoretical aspects, the measurements methods and real successful

cases of the vibro-acoustic testing methods. We will show how to interpret vibro-acousticsignatures simply. We will introduce also differences and similitudes between the breaker testing

and the tap changer testing.

For example, in a breaker case, the vibro-acoustic test has permitted to detect precisely that the

origin of a SF6 gas leakage was due to a high impact of a mobile element on the breaker carter.

The repetitive vibro-acoustic test has permitted to adjust precisely the strength of the impact

without affecting the mechanical breaker performance.

In Tap Changers example cases, we will show how synchronism and wear contact problems are

easily detected ON LINE or OFF LINE.

Finally, after a campaign of real tests realised in Hydro-Québec substations on both typeapparatus, we will evaluate the efficiency of the vibro-acoustic testing in a maintenance program.


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1 CEAI EPO N. 0637003038 " " P H IE , , C

2 F D ABB C B, C, D, G L H 17 D2009

3 H D 17 D 2009

4 " " PP J 2009 H M L

5 " " B M. F,. B, C. EMO P, 2001

The following references are recommended:

1 . B, M. F, ., , CIG 1996 , 12101.

2 F. . " ,"I M C, 2005. IMC 2005. P IEEE, 3, I , 1619 M 2005, (): 22882293

3

P. K, D. B, " . ," IEE P. G. . D. 148, 307311 (2001)

4 K. , " ," C A 2006.

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