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Vol. 165, Issue 2, February 2014, pp. 40-45




On-line Monitoring System Based on Principle of Electro-acoustic Monitoring
for Transformer Partial Discharge

Guang Ya LIU, Xing ZHANG, Lu KANG

Electronic Engineering, Hubei University of Technology, Wuhan, 430068, Hubei Province, China

E-mail: whltxz@aliyun.com, 669037364@qq.com, connie_kl@163.com


Received: 29 October 2013 /Accepted: 28 January 2014 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems


Abstract: Partial discharge inside a transformer is mainly responsible for the insulation aging and damage of the transformer. However, partial discharge is usually accompanied by external signals like sound, light and electrical signals and detectable physical phenomena such as characteristical gas and dielectric loss. Therefore, it is of great significance to monitor online the external signals and phenomena formed during partial discharge of the transformer when the transformer diagnoses faults. This paper gives a comprehensive overview of the electro-acoustic joint monitoring principles and its monitoring systems and the judgment skills concerned, on the basis of which the monitoring system is designed.


Keywords: Transformer, Accident, Partial discharge, On-line monitoring.


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