基于加速退化试验数据的智能电能表早期失效分析

摘要

基于加速退化试验进行智能电能表的寿命预测，是当前解决智能电能表的可靠性评估的一种有效手段。智能电能表在设计、制造过程中不可避免的引入早期失效的问题，若在开展加速退化试验工作时，不对检测得到的智能电能表性能数据进行早期失效分析，将存在早期失效的智能电能表的伪寿命数据引入寿命评估，会导致错误的寿命评估结果及不必要的后期维修更换成本、风险。针对智能电能表的加速退化试验数据处理问题，提出了一种基于加速退化试验数据的早期失效分析方法，并以某单相智能电能表为例，进行了分析验证，本文的研究进一步提升了智能电能表寿命评估的准确性。%Life prediction based on the accelerated degradation data analysis is an effective means for the reliability evaluation of intelligent watt-hour meter. In the process of design and manufacture, the early failure problem is inevitably introduced to watt-hour meter. If the early failure analysis is ignored in the accelerated degradation test, the pseudo data will be introduced to life prediction, which will lead to wrong life evaluation and the unnecessary maintenance cost and risk. In this paper, an early failure analysis method based on the accelerated degradation test data is proposed to solve the problem of the accelerated degradation test data processing of the intelligent watt-hour meter. At last, the method is verified by the analysis of a single-phase intelligent watt-hour meter, and the life assessment accuracy of the intelligent watt-hour meter is further enhanced by this method.