基于PSCAD4.2软件的电力系统距离保护仿真分析

分析了输电线路距离保护的基本原理,并基于PSCAD4.2软件搭建了电力系统距离保护仿真模型,设置了输电线路可能发生的接地故障和相间故障,得出不同故障类型下输电线路的电压、电流以及其他量的变化规律的波形,仿真结果表明,利用该软件建立的模型能够准确反映距离保护的作用机理,即距离保护装置能够快速响应故障信号并动作于断路器,实现输电线路的保护。

Simulation Analysis of Power System Distance Protection Based on PSCAD4.2 Software

Analysis was made on the basic principle of power transmission line distance protection, this paper built up the distance protection simulation model based on PSCAD4.2 software and set possibly happening grounding faults and faults between phases of the transmission lines, to get waveforms of voltage, current and other change rules transmission line under the conditions of different fault kinds. Simulation result shows that the established model with this software can correctly reflect function mechanism of distance protection, that the distance protection device is able to respond to fault signal fast with action on the circuit breaker, to realize protection of power transmission lines.