文章摘要
引用本文:褚福亮,金 涛.基于EEMD和能量法的谐振接地配网故障选线方法[J].福州大学学报(自然科学版),2015,43(2):207~213
基于EEMD和能量法的谐振接地配网故障选线方法
A fault line-selection method in resonant earthed distribution network based on EEMD and energy theory
  
DOI:10.7631/issn.1000-2243.2015.02.0207
中文关键词: 谐振接地  故障选线  EEMD  能量法  能量权重系数
英文关键词: resonant grounding  fault line-selection  EEMD  energy method  energy weight coefficient
基金项目:
作者单位
褚福亮 福州大学电气工程与自动化学院福建 福州 350116 
金 涛 福州大学电气工程与自动化学院福建 福州 350116 
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中文摘要:
      在分析谐振接地配电网发生单相接地故障时暂态电流特征的基础上,首先利用集合经验模态分解法对各条线路首端的零序电流进行分解,然后提取各线路零序电流较高频率的谐波分量和衰减的直流分量,进而求取各线路的能量权重系数.通过比较各线路能量权重系数之间的关系可选出故障线路.若某条线路的能量权重系数最大,且其能量权重系数超过所设定的阈值,则此条线路发生了故障;若所有线路的能量权重系数都没有超过所设定的阈值,则母线发生了故障.仿真和实验表明,该方法可适用于高阻接地故障、小角接地故障等不利于实现选线的故障,且该方法的选线准确度较高.
英文摘要:
      Based on the feature analysis of transient current when a single phase ground fault occurring in resonant earthed system,firstly,this paper used ensemble empirical mode decomposition to extract high-frequency harmonics and decaying direct-current component of zero sequence current in primary side of each lines,and calculated the energy weighting coefficient of each lines. Through comparing energy weighting coefficient of each lines,the fault line could be detected. The fault occurs in a line when the energy weight coefficient of the line is greater than threshold or occurs in the bus when all energy weight coefficients are less than threshold. Through simulations and experiments,the proposed method can be proved to select the fault line accurately in the case of high fault impedance,small inception angle and etc.
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