发电机保护中的三次谐波滤过器和滤波器算法

High Performance Algorithm for Third-Harmonic Pass Filter and Block Filter in Generator Protection

针对发电机定子一点接地保护及匝间短路保护中，要求配置三次谐波滤过器和三次谐波滤波器的实际情况，设计了三次谐波滤过器和三次谐波滤波器的算法，这两种算法具有计算简单、性能优良且不受频率偏移影响的特点。这些算法已在有关实际保护装置中应用。

In view of the situation of disposing third-harmonic pass filter and block filter in winding one point to ground fault protection and coil-to-coil fault protection of generator, the algorithm of third-harmonic pass filter and block filter is designed. The two kinds of algorithm possess the features of simply calculation and excellent performance and is not influenced by deviation of frequency. These algorithms have been used in actual protection equipment.