基于有限个μPMU和压缩感知理论的主动配电网复故障定位方法  

Complex Fault Location Method of Active Distribution Network Based on Finite NumberμPMU and Compression Perception Theory

作　　者：施泽慧 牟龙华[1] SHI Zehui;MU Longhua(Department of Electrical Engineering,Tongji University,Shanghai 201804;Shinan Power Supply Company,State Grid Shanghai Municipal Electric Power Company,Shanghai 200030)

机构地区：[1]同济大学电气工程系,上海201804 [2]国网上海市电力公司市南供电公司,上海200030

出　　处：《电气工程学报》2024年第3期334-342,共9页Journal of Electrical Engineering

基　　金：上海市科学技术委员会资助项目(21142201200)。

摘　　要：主动配电网(Active distribution network,ADN)动态行为相较传统电网更为复杂,亟需解决其故障检测和定位问题。针对配电网系统中微型同步相量测量装置(Micro phasor measurement unit,μPMU)的运用,提出基于有限个μPMU的复故障定位策略。首先,根据任意线路故障下全网可观的μPMU优化配置方案建立短路、断线故障线路等效模型,通过分析模型将电流故障分量等效至相邻两端节点形成虚拟注入电流向量。其次,利用压缩感知理论求解故障网络节点电压方程,根据重构电流向量中非零元素的位置得到可疑故障节点,并基于可疑故障节点及μPMU配置位置划分动态候选故障域。最后,先分别构建短路、断线区域判据,确定故障区间,再进一步根据区域两端推算电压构造线路判据,精确判断故障线路及类型。基于改进的IEEE 33节点配电网系统进行仿真分析,仿真结果表明,基于有限个μPMU的复故障定位策略是可行的,该策略能够有效判断故障的精确位置。The dynamic behavior of active distribution network(ADN)is more complex than that of traditional power grid,so it is urgent to solve the problem of fault detection and location.Aiming at the application of micro phasor measurement unit(μPMU)in distribution system,a complex fault location strategy based on limited numberμPMUs is proposed.Firstly,according to the considerableμPMU optimal configuration scheme of the whole network under any line fault,the equivalent model of short circuit and broken line fault is established.Through the analysis model,the current fault component is equivalent to the adjacent nodes at both ends to form a virtual injected current vector.Secondly,the compressive sensing theory is used to solve the voltage equation of fault network nodes,and the suspected fault nodes are obtained according to the positions of non-zero elements in the reconstructed current vector.The dynamic candidate fault domain is divided based on the suspected fault nodes andμPMU configuration positions.Finally,the short circuit and broken line area criteria are constructed respectively to determine the fault interval,then the line criterion is constructed according to the estimated voltage at both ends of the area to accurately judge the fault line and type.Based on the improved IEEE 33-node distribution system,the simulation results show that the complex fault location strategy based on limitedμPMUs is feasible,and the strategy can effectively determine the exact location of the fault.

关 键 词：配电网 微型同步相量测量装置 故障定位策略 压缩感知理论 电压推算 

分 类 号：TM854[电气工程—高电压与绝缘技术]