应用小波包构成暂态零序功率分量的消弧线圈接地系统故障选线保护

引入一种新的基于小波包分析的小接地系统单相接地短路故障选线方法:利用零序电压和零序电流的小波包系数构成零序功率分量,并以此构成故障选线保护判据,通过比较其相位特征完成故障选线工作。利用MATLAB仿真了一个中性点经消弧线圈接地的小系统,通过对仿真结果的分析和计算,证明了此方法的正确和有效。

Single-phase fault detection based on the wavelet packet analysis of zero-sequence power components in the Petersen-coil grounded system

A new single phase earth fault detection technique based on wavelet packet analysis is introduced in this article: The zero sequence power components are formed of the wavelet packets coefficients of the zero sequence voltage and currents, and are used to be the signs of fault detection, the fault detection is accomplished with comparing the phases of the power components. A small Petersen coil grounded system is simulated in the article, analyzing and computing the simulation results, the rightness and availability is proved.