Reason analysis of suddenly opening of mediumpressure regulating valve in digital electrohydraulic control system

Huadian Technology ›› 2011, Vol. 33 ›› Issue (11): 23-27.

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Reason analysis of suddenly opening of mediumpressure regulating valve in digital electrohydraulic control system

ZENG Aiping

Hunan Changsha Power Generation Corporation Limited, Changsha 410203, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-11-25 Published:2011-11-25

Abstract

Abstract: In the Hunan Changsha Power Generation Corporation Limited, after the overhaul of the unit No.1, the mediumpressure regulating valve suddenly opened during rolling the turbine and warming up two times, and the rotate speed was increasing quickly and can not be controlled. The digital electrohydraulic control system and the reason of the mediumpressure regulating valve suddenly opening were analyzed in detail. After the effective measures were adopted, the suddenly opening of the mediumpressure regulating valve was not occurred again. 

Key words: digital electro-hydraulic control system (DEH), warming up logic, speed increasing, reason analysis

ZENG Aiping. Reason analysis of suddenly opening of mediumpressure regulating valve in digital electrohydraulic control system[J]. Huadian Technology, 2011, 33(11): 23-27.

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Reason analysis of suddenly opening of mediumpressure regulating valve in digital electrohydraulic control system

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