含分布式电源的小电流接地系统行波测距的研究  

Research on Traveling Wave Distance Measurement of Small Current Grounding System with Distributed Power Supply

作　　者：徐子熠 刘庆瑞[1] 石建华 刘嘉元[1] 

机构地区：[1]河北科技大学电气工程学院,河北石家庄050080 [2]中国宏秀电气有限公司,浙江乐清325000

出　　处：《通信电源技术》2015年第6期4-7,共4页Telecom Power Technology

摘　　要：分布式电源DG接入配电网会改变配电网络的拓扑结构和潮流方向,使得单相接地故障测距难以解决。对比分析含DG和不含DG的小电流接地系统零序电流分布,得出基于暂态零序电流选线方法适用于含DG的配电网络。DG的接入不改变配电系统波阻抗,不产生不匹配点,根据小波变换模极大值检测零模行波波头到达时刻,用双端测距法进行故障测距。最后在Matlab/Simulink环境中建立仿真模型,仿真结果表明该方法能够准确、可靠地实现故障定位。The distributed power generation（DG） accessing distribution network will change the topology structure and trend direction of distribution network, making the single phase grounding fault location difficult to solve. Comparative analysis with zero sequence current distribution of including DG and excluding DG in the small current grounding system, method of based on the transient zero sequence current line selection is suitable for distribution network with DG The access of DG does not change the distribution system impedance, and does not produce no matching points, the arrival time based on wavelet transform modulus maximum can be detected zero-mode traveling wave, using two terminal fault location method for fault location. Finally, simulation model is established in Matlab / Simulink environment is established, and simulation results show that the fault location can be achieved accurately and reliably.

关 键 词：分布式电源 零模行波 双端测距 小波变换 故障定位 

分 类 号：TM862[电气工程—高电压与绝缘技术]