期刊论文

Study on partial discharge location of power cables based on structural similarity index algorithm

中文

电力科学与技术学报

1673-9140

2019

34

2

161-168

10.3969/j.issn.1673-9140.2019.02.023

湖南省自然科学基金（2016JJ5018）；

本校为第一机构

有效监测和定位局部放电对XLPE电缆的可靠运行有着十分重要的意义.对此提出一种基于结构相似性算法(SSIM)的局部放电源定位技术.通过分析单芯XLPE电缆的结构,结合局部放电脉冲信号在电缆中传播的基本规律,推导单个局部放电信号到达相邻两电缆接头或接头与终端之间的关系.依此应用SSIM算法比对从电缆接头或终端采集的脉冲电流信号的相似度,实现对局部放电源的精确定位.该文建立一套35 kV试验研究平台,通过高压试验验证该方法的可行性,定位误差在1 m范围内,且对靠近电缆接头或终端的局部放电源有较好的定位效果.

Monitoring and localization of partial discharges (PDs) is important for the reliable operation of XLPE cables.In this paper,a localization technology is proposed based on structural similarity (SSIM) algorithm.Firstly,the structure of single core XLPE cable is analyzed.Considering the propagating properties of a single PD pulse signal inside the cable,the differences are then studied for a single PD signal arrives two adjacent cable joints or joint-terminal.Then,the SSIM algorithm is utilized to analyze the similarity of pulse current signals acquired from the head or terminal of cable.Finall...