超高压线路近端故障的快速距离保护

Fast Distance Protection for Proximal Fault of EHV Transmission Line

提出了一种针对超高压线路近端故障的快速距离保护新算法.该方法利用积分算法响应速度快、计算工作量小的特点,基于微分方程模型,结合工频变化量原理,有效地实现了超高压长线路近端故障的正确快速动作.基于RTDS数模仿真平台,对500 k V线路的多种故障形式进行了数模仿真试验,验证了该算法在超高压线路近端故障时可靠快速的动作性能.

A fast distance protection algorithm for proximal fault of EHV transmission line is proposed. Based on differential equation model and power frequency variation principle,the method has fast response speed and small workload. And the protection for proximal fault of long distance EHV transmission lines can be correctly implemented in a very short time. Finally,through the RTDS simulation platform,a variety of fault modes of 500 k V transmission lines is realized,and the accuracy and rapidity of the algorithm is verified by the simulation result.