基于小波包能量分析的小电流接地故障选线的研究

Research of Fault Line Selection in Small Current Grounding System Based on Wavelet Packets and Energy Analysis

通过对配电网接地故障的稳态和暂态过程的深入分析并结合小波包理论,文章提出了一种基于小波包和能量大小进行配电网单相接地选线的新方法,介绍了该方法的选线基础、原理及步骤。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,具有较高的实用价值。

Through deep analysis of stable state and transient state process of grounding fault in distri- bution network and combining with wavelet packets theory, the paper put forward a new method of singlephase grounding line selection in distribution network based on the wavelet packet and energy, introduced base, principle and procedure of line selection of the method. The simulation experiment of Matlab indicated that the line selection method enhanced accuracy and reliability of grounding fault line selection, which had good application worth.