基于故障分量相关分析的供电牵引网异相短路保护

基于对异相短路的分析，发现两相电流故障分量波形呈现反向对称性，可利用相关分析法快速提取此特征。根据供电牵引网特点，建立了基于两相电流故障分量波形的相关分析识别异相短路的保护新方法。基于MATLAB的仿真分析和实际短路故障数据分析表明，该方法对该类型短路具有良好的识别能力，可在牵引变电所保护系统中配置该保护。

Protection Against Wrong-phase-coupling of Power Traction System Based on Correlation Analysis of Fault Component

The waveforms of the current fault component of two phases are symmetrical according to an analysis of wrongphase-coupling. This characteristic can be quickly extracted by correlation analysis. Based on the characteristic of the power traction system, a new protection scheme is developed by referring to the correlation analysis of the fault component. The MATLAB simulation results and the analysis of actual data on a short circuit fault show that, with its good discernment, this protection scheme can be equipped in the protection system of the traction power substation.