发电机定子接地保护在二滩水电站的应用

结合二滩水电站的实际运行情况,阐述了基波零序电压和外加电源注入式定子接地保护的原理。通过对一次定子接地故障的研究,介绍了定子接地保护动作的分析方法。从3个不同的角度计算了故障点的位置和故障点的接地电流,结合查找出的故障点位置,验证了定子接地保护的准确性和正确性。

Application of Generator Stator Grounding Protection in Ertan Hydropower Station

According to the operational situation of Ertan Hydropower Station,the operation principle of the stator grounding protection based on zero-sequence fundamental voltage and external injection voltage are introduced.Through the study of a stator grounding fault,the analysis methods of stator grounding protection action are introduced.The grounding current and location of the fault point are calculated from three different points of views.Combined with the found location of the fault point,the accuracy and correctness of the protection are verified.