基于无线通信的多点接地故障定位研究

Research on Multi-point Grounding and Fault Location Based on Wireless Communication

为了精准提取三相电流故障分量,提升多点接地故障定位效果,提出一种基于无线通信的多点接地及故障定位方法。利用ZigBee无线通信技术采集并传输多点接地电流信息;以无线传感器为节点,利用相邻节点信息的故障网络电流提取法,获取邻近节点间的电流差,即多点接地暂态零序三相电流故障分量;依据该故障分量,建立多点接地故障定位模型;利用自适应二进制差分进化算法求解故障定位模型,通过自适应调整的变异因子与交叉因子,改进二进制差分进化算法,获取更为精准的故障定位求解结果。实验证明,该方法可精准传输三相电流信息,合理提取三相电流故障分量,且与实际情况相符。在不同过渡电阻与相位角时,该方法接地故障定位误差仅有0.04。

In order to accurately extract the three-phase current fault components and improve the multi-point grounding fault location effect,a multi-point grounding and fault location method based on wireless communication is proposed.It uses ZigBee wireless communication technology to collect and transmit multi-point grounding current information,takes wireless sensors as nodes,and uses the fault network current extraction method of adjacent node information to obtain the current difference between adjacent nodes,i.e.,multi-point grounding transient zero-sequence three-phase current fault component.Based on the fault component,a multi-point grounding fault location model is established,the adaptive binary differential evolution algorithm is used to solve the fault location model,and the binary differential evolution algorithm is improved through the adaptively adjusted variation factor and cross factor to obtain more accurate solution.Experiments show that the method can accurately transmit the three-phase current information,reasonably extract the three-phase current fault components,and is consistent with the actual situation.Under different transition resistances and phase angles,the ground fault location error of this method is only 0.04.