基于小波分析的配电网单相接地故障智能化检测方法

Intelligent Detection Method of Single-phase Grounding Fault in Distribution Network Based on Wavelet Analysis

常规的故障智能检测方法主要是根据故障发生后,配网结构的变化来定位故障,并未考虑到故障注入信号的电流相位,检测效果不佳。文中设计了一种基于小波分析的配电网单相接地故障智能化检测方法,该方法可以检测单相接地故障注入信号的电流相位,确定配电网单相接地故障的耗散功率。基于小波分析的配电网接地故障智能定位算法可以找出瞬时、奇异的电气信号,避免过渡电阻对故障检测的影响,从而实现对配电网故障的精准检测。文中采用仿真实验的方式,验证了该检测方法的检测效果,证实了该方法能应用于实际生活。

The conventional intelligent fault detection method mainly locates the fault according to the change of the dis-tribution network structure after the fault occurs,and does not take into account the current phase of the fault injection signal,and the detection effect is not good.In this paper,an intelligent detection method for single-phase grounding faults in distribution networks based on wavelet analysis is designed.The method can detect the current phase of the single-phase grounding fault injection signal and determine the dissipated power of the single-phase grounding fault in the distribution network.The intelligent location algorithm for grounding faults in distribution networks based on wavelet analysis can find instantaneous and singular electrical signals,avoid the influence of transition resistance on fault detection,and realize ac-curate detection of distribution network faults.In this paper,simulation experiments are used to verify the detection effect of the detection method,which confirms that the method can be applied to real life.