电器与能效管理技术 ›› 2022, Vol. 0 ›› Issue (11): 63-68.doi: 10.16628/j.cnki.2095-8188.2022.11.011

• 系统检测与保护 • 上一篇    下一篇

基于Weibull分布与迭代极大似然估计法的继电保护装置可靠性评估

王晶晶1, 孙志绚2   

  1. 1.潍坊科技学院 建筑工程学院, 山东 寿光 262700
    2.山东农业大学 机械与电子工程学院, 山东 泰安 271018
  • 收稿日期:2022-05-12 出版日期:2022-11-30 发布日期:2023-01-04
  • 作者简介:王晶晶(1991—),女,讲师,博士,研究方向为可靠性评估理论与应用、工程灾害监测与预报、GNSS性能评估。|孙志绚(2000—),女,研究方向为可靠性评估理论与应用。
  • 基金资助:
    山东省自然科学基金资助项目(ZR2022QD100);潍坊科技学院博士科研启动基金(2021KJBS16);山东省高校设施园艺实验室资助项目(2018YY064)

Reliability Assessment of Relay Protection Devices Based on Weibull Distribution and Iterative Maximum Likelihood Estimation

WANG Jingjing1, SUN Zhixuan2   

  1. 1. School of Architectural Engineering,Weifang University of Science and Technology,Shouguang 262700, China
    2. College of Mechanical and Electronic Engineering,Shandong Agricultural University, Taian 271018, China
  • Received:2022-05-12 Online:2022-11-30 Published:2023-01-04

摘要:

针对小样本、截尾数据条件下的继电保护装置可靠性评估问题,提出了一种基于两参数Weibull分布的迭代极大似然估计法。收集继电保护装置现场运行数据,应用两参数Weibull分布对其进行可靠性建模,使用迭代极大似然估计法估计Weibull分布模型参数,得出继电保护装置寿命分布的可靠度函数、累积故障分布函数、故障密度函数与故障率函数。通过仿真试验,结果表明所提方法计算的继电保护装置可靠性指标与实际工程应用经验值基本一致,具有较高的准确性与实用性。

关键词: 继电保护装置, 可靠性评估, Weibull分布, 迭代极大似然估计

Abstract:

Aiming at the reliability assessment of relay protection devices with small samples and censored data,an iterative maximum likelihood estimation method based on two-parameter Weibull distribution is proposed.The field operation data of the protective relays is collected,the two-parameter Weibull distribution is used for reliability modeling,and the iterative maximum likelihood estimation method is used to estimate the parameters of the Weibull distribution model.Finally,the reliability function,cumulative failure distribution function,failure density function and failure rate function of relay protection device life distribution are obtained.The simulation results show that the reliability indexes of the relay protection device calculated by the proposed method are basically consistent with the actual engineering application experience values,which can proved the assessment method has high accuracy and practicability.

Key words: relay protection device, reliability assessment, Weibull distribution, iterative maximum likelihood estimation

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