电力设备局部放电定位技术评述

Review of Partial Discharge Localization Technology for Power Equipment

局部放电是造成电力设备故障的主要原因之一,开展局部放电定位研究一直是电力设备故障诊断的有效手段。本文根据模拟实验及工程实际情况,从电力设备局部放电定位模型、原理、噪声、误差等多方面进行分析,对现有的数学方法及智能定位算法进行对比,重点分析了"特高频-声"及"特高频-光"联合定位法,指出了其在发展中的优势及不足,并对多局放源的定位问题进行了论述,重点对相控阵技术的定位模型、原理及效果进行了探讨,为今后现场电力设备局部放电的精确定位提供了新的研究方向。

Partial discharge （PD） is one of the main reasons of power equipments Iallure, ana me research of partial discharge localization is an effective method of fault diagnosis for power equipment. According to the simulation experiments and engineering practices, the partial discharge localization model, principle, noise, and error of power equipments were analyzed. The existing mathematical methods were compared with intelligent localization algorithms. The ＂UHF-acoustic＂ and ＂UHF-light＂ combined localization methods were emphatically analyzed, and their advantages and disadvantages were pointed out. The localization problem of multi-PD source was discussed, and the localization model, principle and effect of phased array technology were emphatically analyzed. This review provides a new research direc- tion for the precise localization of partial discharge on power equipment in future.