基于EMTP稳态计算的距离继电器静态动作特性分析方法

介绍了一种基于电力系统电磁暂态仿真程序（EMTP）稳态计算的距离继电器静态动作特性分析方法。该方法建立分布参数的网络模型,按照“改进直接法”的原理反复修改过渡电阻,并调用EMTP进行稳态故障计算来确定继电器的动作情况,从而求出某个故障点的临界支接电阻。综合全网络所有故障点的计算结果可得到某种故障继电器在该系统中的支接阻抗特性。该方法的网络结构具有一般性,故障计算准确可靠,仿真结果具有说服力。

STATIC CHARACTERISTIC ANALYSIS OF DISTANCE RELAY BASED ON EMTP STEADY STATE COMPUTATION

This paper presents a novel method for static characteristic analysis of distance relay. In a distributed parameter system model, the fault resistance is modified according to "the improved direct principle". The operation of the distance relay is decided by the fault current and fault voltage based on the steady state computation of Electro Magnetic Transients Program. The fault point is changed orderly after the critical tapped resistance in the fault point is found. The tapped resistance characteristic of this kind of distance relay is obtained when every fault point in the system model is considered. The influence of changing system parameters such as source impedance is studied. The simulation results show that this method is valid and will have a wide application.