基于能量特征的配电网接地故障暂态选线方法研究  

Study on transient fault line selection method for distribution networks based on energy haracteristics

作　　者：张才庆 王铭[1] 李潘 赵天翔 王燕亮 ZHANG Cai-qing;WANG Ming;LI Pan;ZHAO Tian-xiang;WANG Yan-liang

机构地区：[1]中国石油大学胜利学院,山东东营257000

出　　处：《节能》2021年第9期68-71,共4页Energy Conservation

基　　金：2020年大学生创新创业训练计划资助项目“基于能量和瞬时变化率的配网综合性故障选线研究及方案设计”(项目编号:2020018)。

摘　　要：为进一步提高故障选线的准确性,充分利用配电网发生接地故障时暂态特征信息,提出一种基于能量特征的故障选线方法。从剖析故障线路与非故障线路的暂态过程的电气量差别入手,运用小波变换分析,对故障后各线路信号分解,提取高频小波系数,计算各线路高频段能量,通过区分不同馈线能量的差异实现故障选线。In order to further improve the accuracy of fault line selection and make full use of the transient characteristic information of distribution network when grounding fault occurs, a fault line selection method based on energy characteristic is proposed. Starting with the analysis of the electrical quantity difference in the transient process between the fault line and the non fault line, the wavelet transform analysis is used to decompose the signal of each line after the fault,extract the high-frequency wavelet coefficient, calculate the high-frequency band energy of each line, and realize the fault line selection by distinguishing the energy difference of different feeders.

关 键 词：配电网 能量特征 小波分析 故障选线 

分 类 号：TM711[电气工程—电力系统及自动化]