微机线路保护四边形阻抗元件动态特性分析

Dynamic Analysis for Quadrilateral Impedance Algorithm of Microcomputer-Based Transmission Line Protection

分析了微机型输电线路保护中方向性四边形阻抗元件在保护装置正反向出口附近发生短路时存在的问题，提出了一种解决问题的有效方法，并给出了相应的保护算法。

Analyzes the problems of directional quadrilatetal impedance algorithm while faults taking place at the start point of the transmission line or the back of the protection device, presents an efficient methed which can resolve above problems, and provides a corresponding protection algorithm.