Failure Number Prediction and Replacement Strategies for Electricity Meters in Service

The prediction of failure numbers is helpful to develop and optimize the strategies of operation and management for smart electricity meters. In this paper, a failure number prediction method for smart electricity meters based on Weibull distribution and odds ratio was proposed. Then strategies for spare parts inventory and rotation were developed based on the on-site failure data of smart electricity meters. The odds ratio was used to compute the distribution of failure number of meters. The confidence intervals of distribution parameters and failure numbers in the future time interval were given. The research results have reference value for making operation plan and reserve strategy of electricity meters.