基于正序故障分量的方向元件性能分析

Analysis of the directional relay performance based on the positive-sequence fault components

基于正序故障分量的方向继电器是一种新型故障方向判别元件。为全面了解该元件的工作性能,在500kV输电系统模型上,对振荡伴随不同类型短路和非全相运行情况下方向元件的动作行为进行仿真计算和分析。仿真结果表明,基于正序故障分量的方向元件适应于所有故障类型,不受负荷电流影响,无电压死区,灵敏度高。

The positive-sequence fault components based directional relay is a new type of unit for recognizing fault direction. To understand the relay's performance comprehensively, this paper carries on the simulation calculation and analysis under the conditions of different fault types accompanied with power oscillation and incomplete phase operation on a 500 kV transmission line model. The simulation results show that this new directional relay can adapt to all transmission line fault types. Moreover, its behavior is not affected by load current, and it has no voltage dead zone and owns a high sensitivity.