章江铭,姚力,徐韬,陆春光,刘炜,周佑.基于多应力影响威布尔分布模型的电能表寿命预判及验证[J].电测与仪表,2021,58(5):195-200. Zhang Jiangming,Yao Li,Xu Tao,Lu Chunguang,Liu Wei,Zhou You.Life prediction and verification of electricity meter based on multi-stress influence Weibull distribution model[J].Electrical Measurement & Instrumentation,2021,58(5):195-200.
基于多应力影响威布尔分布模型的电能表寿命预判及验证
Life prediction and verification of electricity meter based on multi-stress influence Weibull distribution model
The failure distribution characteristics of different failure modes of electricity meter are different, and the stress types and degradation processes that induce their failures also differ. This paper proposes a method for predicting the life of electricity meter based on multi-stress influence Weibull distribution model. The stress types mainly include environmental stress and electrical stress. Historical fault data of electricity meter is used to establish Weibull distribution model of failure rate of each failure mode, and then, for the main types of influence stress, a model is established between the influence stress and failure rate of each failure mode, and the influence coefficient is calculated. The short-term life of the overall electricity meter is obtained by adjusting the failure rate at the predicted stage of each failure mode. By verifying fault data of the actual electricity meter in field, the average deviation rate of the cumulative failure rate is 1.99%, the average deviation rate of the number of failures is 4.41%, showing that the proposed method can effectively predict the life of the electricity meter, and provide technical support for electricity meter status replacement, and fault early warning.
