| 基于动态故障树的DEH系统优化的可靠性评价 |
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| 引用本文： | 钱虹,骆建波,金蔚霄,周金明,臧旭东.基于动态故障树的DEH系统优化的可靠性评价[J].中国电力,2014,47(5):92-96. |
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| 作者姓名： | 钱虹 骆建波 金蔚霄 周金明 臧旭东 |
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| 作者单位： | 1. 上海电力学院 自动化工程学院，上海 200090;2. 上海市电站自动化技术重点实验室，上海 200072;3. 华电望亭电厂，江苏 苏州 215155 |
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| 基金项目： | 上海市电站自动化技术重点实验室资助项目（04DZ05901）； 2013年华电集团科技资助项目 |
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| 摘 要： | 针对数字电液调节系统（DEH）的功率控制故障后会导致检测系统故障的问题，提出将功率控制切换到主蒸汽压力控制的优化方案，首次利用建立动态故障树的模型评价DEH系统功能的可靠性。将动态故障树转换成可修复的马尔科夫链进行失效率的计算，通过对比优化前后DEH系统的失效率，论证优化方案的可行性以及优化方案对提高系统可靠性的效果。
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| 关 键 词： | DEH系统 动态故障树 马尔科夫链 可靠性 |
| 收稿时间： | 2013-12-05 |
Reliability Assessment of DEH System Optimization Based on Dynamic Fault Tree Analysis |
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| 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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| Authors: | QIAN Hong LUO Jian-bo JIN Wei-xiao ZHOU Jin-ming ZANG Xu-dong |
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| Affiliation: | 1. School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China; 2. Shanghai Key Laboratory of Power Station Automation Technology, Shanghai 200072; 3. HuaDian Wangting Power Plant, Suzhou 215155, China |
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| 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. |
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| Keywords: | DEH system dynamic fault tree Markov chain reliability |
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