【摘要】 为解决小电流接地配电网系统发生单相高阻接地故障时故障选线准确率和可靠性不高的问题，提出一种基于改进自适应噪声完备集成经验模态分解(improved complete ensemble empirical mode decomposition, ICEEMDAN)与Hausdroff距离的配电网接地故障选线方案。通过分析发现故障线路与健全线路的零序电流在经过ICEEMDAN分解后，利用相关系数最大原则选出的线路本征模态分量(intrinsic mode function, IMF)的波形存在明显差异。对线路IMF分量进行数据标准化处理，使用Hausdroff距离算法量化比较线路IMF分量之间的波形差异，构造出基于Hausdroff距离的两个选线判据，规划了选线方案的流程。利用PSCAD/EMTDC、MATLAB仿真以及试验录波进行了计算验证分析，结果表明选线方案具有可靠性及准确性，同样适用于配电网发生单相高阻接地时的故障选线。更多还原

【Abstract】 In order to solve the problem of low accuracy and reliability of fault line selection in small current grounding distribution network system when single-phase high resistance grounding fault occurs, a fault line selection scheme based on improved complete ensemble empirical mode decomposition(ICEEMDAN) and Hausdroff distance was proposed. In a small current grounding system, by analyzing the zero-sequence current of a single-phase grounding fault, it is found that there is an obvious difference between the waveform of the IMF component of the line selected by using the principle of maximum correlation coefficient after ICEEMDAN decomposition between the fault and the healthy line’s zero-sequence current. The Hausdroff distance algorithm was used to quantify and compare the waveform differences between the intrinsic mode function(IMF) components of the lines for fault selection. At the same time, the IMF components of the lines were standardized to construct two criteria based on the Hausdroff distance, and the scheme and process of fault selection were planned. The calculation verification analysis was carried out by using PSCAD/EMTDC, MATLAB simulation and test recording. The results show that the line selection scheme is reliable and accurate, and it is also applicable to fault line selection when a single-phase high resistance ground occurs in the distribution network.更多还原