平行线对接地距离保护运行特性的影响

Analysis of some protection schemes on double transmission lines on the ground fault conditions

用电压向量图和数字仿真的方法分析了双下偏 I0 极化接地距离继电器、工频变化量距离继电器、零序电抗继电器等在平行双回线的动作特性 。

The performance of some relays is analyzed on the condition of double lines. These relays include 0 polarized relay with double declinational angles, fundamental component mutation realy and zero sequence reactance relay. In addition, improvement is discussed and a new scheme for the comparison of the zero sequence current between the two lines on parallel-wire line is put forward.