Reliability Assessment of DEH System Optimization Based on Dynamic Fault Tree Analysis

doi:10.11930/j.issn.1004-9649.2014.5.92.4

Abstract

Abstract: In this paper, an optimization scheme in which power control is switched to main steam pressure control in digital electro-hydraulic (DEH) governing systems is proposed to address the detection system fault issue caused by the power control failure. A dynamic fault tree model is established to assess the reliability of the DEH system functions for the first time. In addition, this dynamic fault tree is also converted into repairable Markov chain to calculate the failure rate. Through the comparison between the failure rates before and after the DEH system optimization, the feasibility of the optimization scheme and its effectiveness on improving the system reliability are demonstrated and verified.

Key words: DEH system, dynamic fault tree, Markov chain, reliability

CLC Number:

TK323

QIAN Hong, LUO Jian-bo, JIN Wei-xiao, ZHOU Jin-ming, ZANG Xu-dong. Reliability Assessment of DEH System Optimization Based on Dynamic Fault Tree Analysis[J]. Electric Power, 2014, 47(5): 92-96.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.5.92.4

https://www.electricpower.com.cn/EN/Y2014/V47/I5/92

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