基于工频故障分量的方向纵联保护

Direction pilot protection based on power frequency fault components

介绍了工频故障分量的基本概念,提出了利用工频故障分量来判断故障方向的原理,进而形成了一种新的方向纵联保护.应用PSCAD仿真软件对保护的可靠性进行了验证.结果证明,此种保护具有良好的动作特性,且不受系统电势和短路点过渡电阻的影响.

The basic concepts of power frequency fault components were firstly introduced,the principle of using fault components to decide the fault direction was proposed and then a new direction pilot protection was formed.Secondly,simulation software PSCAD was used to test the reliability of protection.Lastly,simulation results show that protection of this type has good acting characteristic,and it will not be affected by the system＇s potential and transition resistance.