摘要
研究含分布式电源配电网单相接地短路故障区间定位方法。由于分布式电源接入,配电网发生短路故障时,分布式电源会向短路点提供一定的短路电流,导致短路电流难以进行整定,故障特征提取困难。为此提出利用集合经验模态分解,对故障零序电流进行分解,获得有限个本征模态函数分量,通过比较各监测点选取的本征模态函数分量一阶差分的极性和模最大值,实现含分布式电源配电网的单相接地故障区间定位。EEMD过程主要采用加、减法对信号进行处理,计算速度快。仿真结果表明,应用上述方法简单、运行速度快、区间定位准确,不受过渡电阻和故障时刻等随机因素影响。
The method of single-phase grounding fault region locating for distribution networks with generators is studied. Under the conditions of interconnection of distribution generators, the generators provide short current, make short current difficult to setting and fault feature extraction. The zero sequence current is decomposed by using ensemble empirical mode decomposition （EEMD）. A finite number of intrinsic mode function components are obtained. The fault region position can be located by comparing the selection of intrinsic mode function components first difference and modulus maximum value. The EEMD process adopts addition and subtraction at a high computing speed. Simulation analysis shows that this method is simple and able to accurately locate the fault at a high running speed. It is free from the influence of the random factors such as transition resistance and fault time.
出处
《计算机仿真》
CSCD
北大核心
2015年第1期132-136,共5页
Computer Simulation
基金
国家自然基金(51165004
61102012)
广西自然科学基金(2012GXNSFAA053195)
广西制造系统与先进制造技术重点实验室主任基金(12-071-11-61-003)
关键词
配电网
分布式电源
区间定位
集合经验模态分解
Distribution networks
Distributed generators （DG）
Region location
Ensemble empirical mode decomposition （EEMD）
