新型暂态零序电流频带能量故障选线法的抗噪分析

由于小电流接地系统单相接地故障电流非常小,干扰影响严重,所以其故障选线一直是一个技术难题,很久以来没有得到圆满解决.在基于暂态零序电流频带能量的配电系统接地选线方法的基础上通过仿真分析了该方法对噪声信号的抗干扰能力,实验结果显示该方法能够在较强干扰的情况下实现正确选线,效果很好.

Noise Proof Analysis of Fault Line Selection Method by Novel Transient Zero-sequence Current Frequency-band Energy

As the single-phase earth current in small current earthing system is very small,the interference effect amplified,so it remains hard to detect the fault line.Based on distribution system grounding fault line selection method by transient zero-sequence current frequency-band energy,through simulation analyses its ability to anti-jam the noise signal,experimental results show that the method can select the correct line in strong interference and works well.