10kV电缆金属护层接地方式对故障暂态行波特性的影响

The impact of 10kV cable metal shield grounding on fault transient traveling wave characteristics

分析了变电站10kV电缆出线发生单相接地故障时,电缆金属护层不同接地方式对故障暂态特性的影响.重点分析对比了暂态电流波初始极性,并利用PSCAD仿真软件进行仿真,利用MATLAB对所获取的波形进行处理比较.大量的仿真结果表明,不同金属屏蔽层接地方式下发生单相接地故障时,故障暂态特性会有所区别,会对原有的故障特性产生影响.

We analyze the impact of different metal shield grounding on the fault transient charac‐teristics of cables w hen the 10kV substation cable outlet single-phase ground fault occurs .We fo‐cuse on analysis and comparison of the initial transient current wave polarity and use PSCAD sim‐ulation software to simulate , then use MATLAB for processing and comparing the acquired waveform .Substantial simulative results show that single-phase ground fault occurs in different metal shield grounding method ,and the fault transient characteristics will be different ,and affect the fault characteristics .