关于发电机定子绕组接地保护3U_0整定的讨论

Discussion about Stator Grounded Protection 3U_0 Setting in Power Plant

本文通过对大型发电机组定子接地保护的作用和目前使用的定子接地保护整定方法进行了介绍。分析计算了在各种运行条件下,主变高压侧发生单相接地故障时耦合至发电机侧的零序电压,并通过计算发电机单相接地时的接地电流,结合《导则》及省电力技术监督办公室文件,提出了发电机定子接地保护的整定建议。

By introducing stator grounded protection and setting method used in power plant,this paper analyzes and calculates the transferred voltage value when single phase grounded fault occurs in the main transformer high voltage side and the stator current value while grounded fault.Combined with the principle of setting and the documents of the Shandong electric technology intendance office,it puts forward a setting suggestion about stator grounded protection.