电力系统自动化2012，Vol.36Issue(19)：17-21,5.
直流保护装置时变失效特性分析
Analysis of Time-varying Failure Characteristics for HVDC Protection Devices
摘要
Abstract
The time-varying aging failure rate(AFR) can simulate the failure characteristic of protection devices more accurately than the mean failure rate(MFR).This paper focuses on the time-varying failure rate(TFR) characteristics for the HVDC protection devices and firstly divides the failure data into two catalogs,i.e.the aging failure and random failure.Next,with the above data,the time-varying aging failure rate(AFR) is estimated with the Weibull distribution function,and the constant random failure rate(RFR) is drown up with estimating exponential distribution function;then TFR is obtained with the addition of AFR and RFR.Furthermore,based on the field failure data of a regional power grid,TFR of the grid can be obtained and the differences in time-varying failure characteristic of different batches and modules of protection devices are given.Results show that different batches of the devices are,respectively,in the loss failure period and the random failure period,thus the maintenance strategy should be formulated severally.Meanwhile,results also indicate that power and communication unit is easy to enter the loss failure period.关键词
高压直流输电/直流保护装置/偶然失效率/老化失效率/时变失效率/Weibull分布Key words
HVDC/DC protection devices/random failure rate(RFR)/aging failure rate(AFR)/time-varying failure rate(TFR)/Weibull distribution分类
信息技术与安全科学引用本文复制引用
薛安成,王宝,王睿琛,曹小拐,毕天姝,黄少锋..直流保护装置时变失效特性分析[J].电力系统自动化,2012,36(19):17-21,5.基金项目
国家重点基础研究发展计划（973计划）资助项目 （）
国家自然科学基金资助项目 （）
高等学校学科创新引智计划（“111”计划）资助项目 （）
