三种失磁保护判据与低励限制配合研究

Research on Cooperation between Three Criteria for Loss-of-excitation Protection and Low Excitation Limit

通过介绍南瑞RCS-985发变组失磁保护判据特性,对二滩水电站失磁保护典型配置方案进行了分析。结合二滩水电站定值,通过将三种不同坐标系下的失磁保护判据映射到阻抗平面和功率平面两种方法,系统研究失磁保护与低励限制的配合关系,验证其定值的合理性。

The typical configuration of loss - of - excitation protection in Ertan Hydropower Station is analyzed according to the criteria characteristics of loss - of - excitation of RCS_985 generator - transformer unit manufactured by Nanrui. Combined with the constant value of Ertan Hydropower Station, the cooperation between loss -of- excitation and low excitation limit is studied by mapping the criteria of loss - of - excitation protection under three different coordinate systems to the impedance plane and power plane, and the rationality of the constant value is verified.