中性点非有效性接地系统故障选线

Fault Line Selection in Neutral Ineffectively Grounded System

通过对中性点非有效性接地系统接地故障暂态过程的分析并结合小波包理论,针对接地故障的特点,提出了利用暂态零序电容电流的特征频带并结合其极性与幅值关系来进行故障选线的方法,介绍了该方法的选线基础、原理和步骤。Matlab仿真实验表明,该选线方法提高了接地故障选线的准确性和可靠性,具有良好的应用前景。

Through deep analysis of transient state component process and characteristics of grounding fault in neutral ineffectively grounded system and combined with wavelet packet theory,a new method of single-phase grounding line selection in distribution network was put forward,based on the characteristic component and its polarity and amplitude.The basis,principle and procedure of fault line selection of the methods were introduced.The Matlab simulation experiment indicated that the line selection method enhanced the accuracy and reliability of grounding fault line selection,which had good application prospects.