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《Journal of Chongqing University of Technology(Natural Science)》 2012-01
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Corona Discharge Characteristics and Gas Generation Law in Transformer Oil

CHEN Xin-gang1,2,ZHAO Yang-yang1 (1.Chongqing University of Technology,Chongqing 400054,China; 2.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044,China)  
Transformer is one of the important equipment of electrical power system and partial discharge would affect the insulation performance of transformer seriously.Because partial discharge is the main factor of the transformer insulation degradation,understanding the emergence and development of partial discharge and the variation law of producing gas in time can determine internal latent fault of transformer.Lots of partial discharge experiments are carried out to research the development characteristic parameters' variation law of corona discharge in transformer,and the variation characteristic of dissolved gases in oil is also researched.The results show that the partial discharge first comes in the negative half cycle,and the discharge phase focuses on the 270°or so.In the corona partial discharge in oil the major gases produced are H2,CO and C2H2,and the content of the gas first increases,then remains stable,and finally increases sharply with the rise of voltage
【Fund】: 输配电装备及系统安全与新技术国家重点实验室访问学者资助项目(2007DA10512711410)
【CateGory Index】: TM855
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