Analysis on reason causing the 500kV main transformer breaker failure protection to refuse to trip

Huadian Technology ›› 2012, Vol. 34 ›› Issue (9): 65-66.

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Analysis on reason causing the 500kV main transformer breaker failure protection to refuse to trip

WANG Tianmin, ZHANG Xiaogang, GAO Bo

Anyang Power Supply Company, Anyang 455000, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-09-25 Published:2012-09-25

Abstract

Abstract: It was found that after the 500kV main transformer breaker failure protection acted, the function of intertrip of the switches in three sides of the main transformer can not be realized in the transmission debug process of a 500kV substation. The fault in this circuit was analyzed, and it was pointed out that the main reason of this fault is the design error which result the malfunction of the 500kV main transformer breaker failure protection to refuse to trip . A solution was proposed to avoid effectively refusing to trip and tripping improperly.
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Key words: substation, main transformer, circuit breaker failure, refuse to trip, improper tripping

WANG Tianmin;ZHANG Xiaogang;GAO Bo. Analysis on reason causing the 500kV main transformer breaker failure protection to refuse to trip[J]. Huadian Technology, 2012, 34(9): 65-66.

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Analysis on reason causing the 500kV main transformer breaker failure protection to refuse to trip

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