基于感受量的接地距离保护整定方法探讨

A DISCUSSION ON GROUNDING DISTANCE PROTECTION METHOD BASED ON DETECTING IMPEDANCE

针对接地距离保护整定计算中基于助增系数的整定方法的不足,探讨了基于感受量的整定方法,给出了普遍适用的整定计算公式。该方法能够实现接地距离保护与配合保护的整定,全面提高接地距离保护的灵敏度,并且易于计算机实现。该方法已经运用于工程实际中,工程算例验证了本方法的正确性和有效性。

According to the shortage of the current method of assistance parameter setting of grounding distance protection, a setting method based on detecting impedance method is presented and the universal setting formulae are given. Using the presented method the feasible coordination of grounding distance protection with other protection can be implemented and the sensitivity of the grounding distance protection can be overall improved. This method is easy to implement by computer and is applied to practical engineering. The correctness and effectiveness of this method is verified by practical examples.