Ultrasonic localization method based on Chan-WLS algorithm for detecting power transformer partial discharge faults by fibre optic F-P sensing array  

作　　者：Hong Liu Tianhe Yang Zhixian Zhang Haoyuan Tian Yuxuan Song Qiuxia Sun Wei Wang Yunjun Geng Weigen Chen 

机构地区：[1]State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing,China [2]State Grid Hubei Electric Power Research Institute,Wuhan,China [3]School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing,China [4]Shandong Taikai Transformer Co.,Ltd.,Taian,China

出　　处：《High Voltage》2024年第6期1234-1245,共12页高电压(英文)

基　　金：Science&Technology Project of China Southern Power Grid,Grant/Award Number:090000KK52222092。

摘　　要：Fibre optic F-P sensor has become one of the mainstream detection methods for partial discharge faults due to their advantages of good insulation,high sensitivity,resistance to electromagnetic interference,simple structure and inexpensive pricing.The first-order resonant frequency of the acoustically sensitive diaphragm of the F-P sensor is given based on the theory of plate and shell vibration,and the fibre optic F-P sensing array is designed based on the Fabry–Perot interference principle.A sensor installation method is also proposed for introducing a fibre optic F-P probe into the power transformer interior using a fibre optic penetrator through flange at the power transformer oil change valve.A system of non-linear equations is developed by utilising the time difference of arrival(TDOA)of the partial discharge ultrasound signal propagation to the F-P sensing array.The Chan-WLS algorithm is used to convert the non-linear equations in the TDOA localisation method into a non-linear optimisation problem to be solved and experi-mentally verified on the 220 kV real power transformer.The experimental results show that the error in the partial discharge fault localisation is solved based on the Chan-WLS algorithm and the actual location is 20.27 cm,which is within the acceptable error.

关 键 词：power FIBRE ALGORITHM 

分 类 号：TM41[电气工程—电器] TP212[自动化与计算机技术—检测技术与自动化装置]