一种基于威布尔分布的继电保护装置可靠性分析的新方法  

A new method for protective relay reliability analysis based on Weibull distribution

作　　者：徐岩[1] 白静[1] 戴志辉[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2012年第4期15-19,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：中央高校基本科研业务费专项资金资助(11MG38)

摘　　要：目前继电保护可靠性研究主要针对保护可靠性评估指标及计算模型方面展开,由于缺乏可靠性基础数据,保护可靠性评估中各种参数很难准确全面获得,评估过程中假设过多,影响了评估效果,难以提供有效的改善措施。收集继电保护装置寿命的相关现场运行数据,对这些数据进行分析处理,应用威布尔分布对其进行可靠性参数估计,利用最小二乘法及平均秩次法估算二参数威布尔分布的参数值,得到继电保护装置寿命的分布函数、分布密度函数、可靠度函数、故障率函数,为继电保护装置的可靠性评估提供依据。The study on reliability of protective relay mainly focuses on the reliability evaluation criteria and models currently. For the lack of reliability based data, protection reliability evaluation of various parameters is difficult to be obtained accurately. Therefore too many assumptions in assessment process affect evaluation result and make it difficult to provide effective improvement measures. This paper collects and analyzes all operation data related to life-circle of relay protection devices, applies Weibull distribution model to estimate the reliability parameters and uses the least square method and average rank time method to find parameter values of two weibull distribution. Then life-circle distribution function, distribution density function, reliability function and failure rate function of relay protection device can be obtained, providing the basis for the relay protection device reliability evaluation.

关 键 词：威布尔分布 浴盆曲线 最小二乘法 平均秩次法 继电保护装置 

分 类 号：TM774[电气工程—电力系统及自动化]