The Simulation and Analysis of Partial Discharge of Cast-Resin Transformers

• Main Authors: LI,CI-CHUN, 李其錞
• Other Authors: Shih-Che Hsu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/18303296155511867273

碩士 === 中原大學 === 電機工程研究所 === 103 === Epoxy-resin transformer is a type of power distribution transformers. If the insulation material of a Epoxy-resin transformer is worn, partial discharge will occur. These phenomena may be caused by the holes inside insulation material, impurities, and other factors etc. This thesis introduces the formation of the partial discharge and its effect and destruction of electrical equipment. The detection methods and standards of partial discharge are further explained. This thesis also describes the internal structure and design of a cast-resin transformer as the basis for partial discharge simulation. A lot of factors will affect the occurrence of partial discharge. This thesis uses finite element simulation software Comsol Multiphysics 4.4 to build cast-resin transformer model. Related material coefficients are selected into the simulation model. Several partial discharge phenomena of insulation breakdown are analyzed by assuming the internal insulation existing different size of holes. The results of this thesis provide a good reference to cast-resin transformer users to assess whether their transformer should be repaired or replaced. Keyword: Epoxy -Resin-Transformer, Partial Discharge, Finite Element Analysis.