LAUSR

This paper proposed the reclosing method in distribution system with battery energy storage system (BESS) using wavelet transform (WT). The proposed method performs the WT of load current and then calculates the absolute value of slope of detail coefficient. The mother wavelet used is db4 of level 6. The fault clearing is detected using the rapid increase of this value. After the detection of fault clearing, the reclosing is performed. To verify the proposed method, various simulations according to the fault clearing times, fault resistances, and fault lengths are performed using EMTP. The simulation results show that fault clearing can be detected using proposed absolute value of slope of detail coefficient and hence the reclosing can be performed successfully.摘要本文提出了采用小波变换 (WT) 的电池储能 (BESS) 配电网系统重合闸方法。 该方法对负载电流进行小波变换, 然后计算细节系数斜率的绝对值。 使用的母小波是 6 级的 db4。 若该值快速的增加即表明故障已清除。 检测到故障清除后, 执行重合闸。 为了验证所提出的方法是否合适, 使用 EMTP (用于电力系统电磁暂态分析的仿真软件) 根据故障清除时间、 故障阻抗和故障范围进行各种仿真。 仿真结果表明, 利用所提出的细节系数斜率绝对值可以检测出故障清除情况, 从而可以成功实现重合闸。