Study on the Methodology of Diagnosis for Transformer Winding Insulation Defects

Abstract:

Power transformer is the important equipment in power system, once the occurrence of faults may bring serious harm to power grid, and even cause great losses. This paper proposes a transformer winding insulation defect detection method. The method only uses the impulse voltage test. It can obtain the diagnosis signal source which contains a lot of harmonic. This paper can judge the insulation defects in the location according to compare the extreme value distribution of every winding voltage and currents correlation coefficient .and can determine the coordinate values. The method does not need large or complex additional equipment, can realize the detection and diagnosis of transformer winding insulation defect location. It is image, intuitive, convenient and practical. This paper studies the insulation defects and the severity of transformer winding, puts forward the method for changing winding current and voltage detection winding insulation defects. And it uses a large number of experiments to verify the insulated and reliability of transformer winding according to different position, different types of insulation defects.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 375-378
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.375
• Online since: February 2014
• Authors: Yu Sheng Quan*, Dai Juan Wang, Guang Chen, Zong Cheng Zhang
• Keywords: Correlation Coefficient, Extreme Value, Insulation Defect Detection, Severity

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