输电线路接地距离保护整定计算方法

对接地距离保护整定计算方法的现状进行了总结和评述,在此基础上,从引入零序电流补偿系数的根本目的出发,提出了更加简单实用的零序电流补偿系数计算方法.针对目前整定计算方法的不足,提出了系统的基于感受阻抗的整定计算方法,具有更普遍的适用性,同时计算定值更加精确,已应用于实际工程中.算例验证了此方法的正确性和有效性.

Coordination of Ground Distance Relays for Transmission Lines

The current methods of calculating the settings of grounding distance relay are summarized and analyzed. A simple and more applicable method is presented to calculate the zero sequence current compensation coefficient for the purpose of introducing the coefficient. In view of the drawbacks of the currently used setting calculation methods, a systematic method based on detecting impedance is proposed to calculate the settings of the grounding distance relay. More widely applicable and accurate, the method proposed is already applied to actual practice. The correctness and effectiveness of this method are verified by examples.