基于性能退化的漏电保护模块可靠性仿真分析

Simulation analysis of leakage protection module reliability based on performance degradation

漏电断路器作为低压配电系统中重要的终端保护电器,在防止漏电事故、保护用电人员人身安全上发挥着重要作用。漏电保护模块由电子元器件组成,其参数偏差和退化造成的参数漂移,都会引起断路器漏电保护性能退化。文中构建漏电保护模块的仿真模型,采用灵敏度分析进行漏电保护模块关键元器件的辨识,考虑容差引起的个体间性能差异,利用Monte-Carlo仿真获取系统性能参数退化数据,分析由元器件退化造成的漏电保护模块性能退化,根据性能变化实现漏电保护可靠性评估,为早期设计提供决策支持。

Residual current circuit breakers are important terminal protection apparatus in low-voltage distribution systems,which play a major role in preventing leakage accidents and protecting the personal safety of power users.The leakage protection module is composed of electronic components,and its parameter deviation and degradation cause parameter drift,which will cause the protection performance degradation of residual current circuit breaker.Therefore,the simulation model of leakage protection module is established,and sensitivity analysis is adopted to identify the key components of leakage protection module.Considering the performance difference caused by tolerance,the Monte-Carlo simulation is used to obtain system performance degradation data.The leakage protection module degradation caused by the degradation of components is analyzed,and the reliability evaluation of leakage protection is realized according to the performance change,which can provide decision support for early design.