郑西高铁全并联AT越区供电时失压保护配置的改进

Under-voltage Protection Configuration Improvement in all Parallel AT Traction with Cross-area Power Supply of ZhengXi High-speed Railway

在郑西(郑州—西安)高铁的运行实践中,发现全并联AT越区供电时部分保护方案配置中存在问题,特别是失压保护配置不当。当采用越区供电方式时,如果被越区段发生故障,将导致被越区段停电,直接影响到正常供电,干扰了高铁的正常运行秩序。现对存在的问题进行了分析和研究,并提出了改进方案予以解决。

The operation practice of the ZhengXi-high speed railway shows that, there are many problems with some protection schemes configuration at the all parallel AT traction with cross-area power supply mode, especially the under-voltage protection configuration is inappropriate. When using the cross-area power supply, if the cross-area section goes wrong, the power supply interruption of this sec- tion occurs, which would disturb the normal operation of ZhengXi-high speed railway. On the basis of analysis and research of the ex- isting problem, this paper puts forward some improvement schemes to solve the problem.