基于小波包分析的配电网谐振接地故障电流计算

Calculation of Resonant Grounding Fault Current in Distribution Network Based on Wavelet Packet Analysis

为了提高配电网谐振接地故障时的判断效果,提出基于小波包分析的配电网谐振接地故障电流计算方法。在基于小波包分析的定位配电网谐振接地故障发生位置的基础上,通过构建配电网谐振控制模型,进一步优化配电网故障定位效果。以此为依据,计算谐振影响下配电网发生接地故障时线路中的电流。实验结果表明,所提方法具有较好的谐振控制效果,能够得到精度更高的配电网谐振接地故障电流计算结果,具有一定的推广价值。

In order to improve the judgment effect of resonant grounding fault in distribution network,a method for calculating resonant grounding fault current in distribution network based on wavelet packet analysis is proposed.On the basis of locating the location of resonant grounding fault in distribution network based on wavelet packet analysis,the effect of fault location in distribution network is further optimized by constructing the resonant control model of distribution network.Based on this,the current in the line when the grounding fault occurs in the distribution network under the influence of resonance is calculated.The experimental results show that the proposed method has better resonance control effect,and the calculation results of resonant grounding fault current of distribution network with higher accuracy.It has certain promotion value.