电力系统及其自动化学报2018，Vol.30Issue(4)：84-90,7.DOI:10.3969/j.issn.1003-8930.2018.04.013
考虑隐性故障的单一保护装置风险评估
Risk Assessment on Single-protection Equipment Considering Hidden Failures
摘要
Abstract
In order to analyze the impact of hidden failures on the relay protection equipment,a risk assessment method for the hidden failures of protection equipment is proposed considering the probabilities of hidden failures and the sever?ity of their consequence comprehensively.First,the probabilities of hidden failures are calculated by using the Markov state-space method,and four single severity indices are constructed based on utility function and Monte Carlo method, including over-voltage,low-voltage,device over-loading and bus load loss.Then,based on analytic hierarchy process (AHP)and entropy weight method,the above four indices are synthesized with weights,and the risk index of hidden failures can be acquired by multiplying the probability value with severity index.Finally,a numerical example verifies the validity of the proposed method.The results in this paper can provide reference for the operation and maintenance personnel of power system.关键词
继电保护系统/风险评估/隐性故障率/严重度函数/蒙特卡洛法Key words
relay protection system/risk assessment/hidden failure rate/severity function/Monte Carlo method分类
信息技术与安全科学引用本文复制引用
卢扬,李永丽,李仲青,孙文鹏..考虑隐性故障的单一保护装置风险评估[J].电力系统及其自动化学报,2018,30(4):84-90,7.基金项目
国家电网公司大电网重大专项资助项目(SGCC-MPLG028-2012) （SGCC-MPLG028-2012）
