摘要
对中性点不接地电网中发生单相接地故障时系统的电压、零序电流、零序功率和工频电流变化量的规律进行了详细的分析,得出了它们的特征。提出了单相接地选线的一种新原理,即利用比较各线路零序电流幅值的大小和工频电流的变化量来同时判断的综合判据原理,此判据可以较大地提高选线的准确性。
By analyzing the rtde of voltage, zero - sequence current, zero - sequence power and the variation of power - frequency current during single- phase grounding fault in isolated neutral distribution network in detailed, their characteristics are found. A synthetic principle based on the comparison of the zero - sequence current and the variation of power - frequency current between the lines at the same time is presented, and it brings a higher accuracy of line selection.
出处
《四川电力技术》
2007年第6期61-64,共4页
Sichuan Electric Power Technology
关键词
中性点不接地系统
选线
工频电流变化量
isolated neutral system
line selection
the variation of power- frequency current
