Detection and positioning method for partial discharge of transformer

• Main Authors: WANG ZHIJUN, HUANG QINGDAN, AO CHANGMIN, XIONG JUN, FANG JIAN, YI MANCHENG, CHEN JUN, WANG YONG, LIU GUANGHUI
• Format: Patent
• Language: Chinese; English
• Published: 16.01.2013
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a detection and positioning method for partial discharge of a transformer, which comprises the steps as follows: utilizing an ultrasonic probe to detect ultrasonic signals generated by partial discharge points of the transformer on the outer side of a transformer oil tank; preprocessing the ultrasonic signals, wherein the preprocessing comprises analog-to-electrical signal conversion processing and analog-to-digital signal conversion processing; and utilizing a hyperboloid positioning method to determine positions of the partial discharge points according to the ultrasonic signals. According to the technology of the invention, internal ultrasonic generated by the partial discharge is detected on the outer side of the transformer oil tank, and the obtained ultrasonic signals are utilized to be combined with the hyperboloid positioning method to determine the positions of the partial discharge points, so that the positioning cost is low, the efficiency is high, and the detection and posit