含分布式电源配电网故障选线研究  

Research on fault line selection of power distribution network with distributed power supply

作　　者：李彩林[1] 陈骏洲 LI Cailin;CHEN Junzhou(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院

出　　处：《现代电子技术》2019年第18期90-94,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61661013)~~

摘　　要：当配电网发生单相接地短路故障时,短路电流中包含分布式电源提供的部分,造成对短路电流的整定和故障特征提取产生困难.为此,文中采用集合经验模态分解(EEMD)对故障零序电流进行分解以获得有限个本征模态函数分量,将处理获得的本征模态函数分量一阶差分的极性和模最大值相互对比,实现故障选线.EEMD过程主要使用加法和减法来处理信号,计算速度快.仿真分析表明,该方法简单、程序运行快、选线精度高,故障时间和过渡电阻等随机因素对选线结果影响小.Since the short-circuit current contains the distributed power supply when the single-phase grounding short-circuit fault occurs in power distribution network, it is difficult to set short-circuit current and extract fault features. Therefore,en- semble empirical mode decomposition(EEMD)is used to decompose zero sequence current to obtain a finite number of eigen-mode function components. Fault line selection is realized by comparing the polarity with modulus maximum value of the first-order difference of the obtained eigenmode function components. In the EEMD process,addition and subtraction are used mainly to process the signals,and accelerate the calculation speed. The simulation results show that the method is simple,its program runs fast,the line selection accuracy is high,and the random factors such as fault time and transition resistance have little influ- ence on the line selection results.

关 键 词：配电网 分布式电源 故障选线 仿真分析 零序电流分解 信号处理 

分 类 号：TN86.34[电子电信—信息与通信工程] TP301.6[自动化与计算机技术—计算机系统结构]