This paper provides a comprehensive review of the acoustic method used for partial discharge (PD) localization in power transformer. The paper outlines the partial discharge mechanism, basic principle and properties of the acoustic emission (AE), advantages and limitations of the acoustic method compared to the electrical method, and different AE based PD localization techniques along with their algorithms used in power transformer. Most of the algorithms proposed in the literature for PD localization in power transformer are based on the time difference of arrival (TDOA) of AE signals. Thus, this paper would help researchers, academicians, and engineering communities working in the area of AE based PD localization in power transformer to avoid insulation damage.

本文全面回顾了用于电力变压器局部放电 (PD) 定位的声学方法。本文概述了局部放电机制、声发射 (AE) 的基本原理和特性、声学方法与电学方法相比的优势和局限性，以及不同的基于 AE 的局部放电定位技术及其在电力变压器中使用的算法。文献中提出的用于电力变压器局部放电定位的大多数算法都是基于声发射信号的到达时间差 (TDOA)。因此，本文将帮助研究人员、院士和工程界从事基于 AE 的电力变压器局部放电定位领域的工作，以避免绝缘损坏。