董贤光,代燕杰,王婷婷,崔越,刘凯辛.基于现场删失数据的电能表可靠性评估方法及轮换策略研究[J].电测与仪表,2021,58(12):175-183. Dong xianguang,Dai Yanjie,Wang Tingting,Cui Yue,Liu Kaixin.Reliability evaluation method and replacement strategy of electric energy meter based on field censored data[J].Electrical Measurement & Instrumentation,2021,58(12):175-183.
基于现场删失数据的电能表可靠性评估方法及轮换策略研究
Reliability evaluation method and replacement strategy of electric energy meter based on field censored data
The useful life of smart electricity meters (SEMs) was improved from 8 years to 16 years, and the operation and maintenance planning of SEMs that are to expire in service in the near future has become a hot and difficult issue. Reliability evaluation model was established based on Weibull distribution using left and right censored data collected in two years, the parameters were estimated using the maximum likelihood estimation, the confidence bounds of model parameters were computed according to Fisher information matrix, and the confidence limits of reliability, MTBF, failure rate, and reliability life were given. For electricity meter replacement, reliability life was employed to characterize the useful life of SEMs, some suggestions on replacement decision-making methods and prolong service lifetime determination methods were given, and engineering example was employed to verify the effectiveness of the methods. The research results have reference value to the optimization of electricity meter operation and maintenance strategies.
