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Research on corona discharge suppression of high-voltage direct-current transmission lines based on dielectric-film-covered conductor

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Plasma Science and Technology 2021年第2期23卷 64-75页

作者： Yuze JIANG Qiying LI Xuekai ZHANG Diwen JIANG Shiqiang LIU Bangfa PENG Jie LI State Grid Shandong Electric Power Research Institute Jinan 250003People's Republic of China State Grid Shandong Electric Power Company Jinan 250001People's Republic of China State Grid Jinan Jiyang Power Supply Company Jiyang 251400People's Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China

corona discharge suppression for high-voltage direct-current(HVDC)transmission lines at line terminals such as converter stations is a subject that requires *** this paper,a method based on a conductor covered with dielectric film is proposed and implemented through a bench-scale *** with the bare conductor,the corona discharge suppression effect of the dielectric-film-covered conductor under positive polarity is studied from the composite field strength and ion current density using a line-plate experimental *** influences of film thickness and film material on the corona discharge suppression effect are *** charge accumulation and dissipation characteristics of different film materials are also *** results show that the conductor covered with dielectric film has excellent ability to inhibit corona *** ground-level composite field strength of the conductor covered with dielectric film is lower than its nominal field strength,and its ion current density is at the nA m^(−2) *** corona threshold voltage can be promoted by increasing the film thickness,but the ability to inhibit corona discharge becomes *** larger the surface electric field strength,the more charge accumulated,but the faster the charge dissipation *** with polyvinyl chloride film,cross-linked polyethylene film has stronger charge accumulation ability and slower charge dissipation rate,which can better restrain the corona discharge of HVDC transmission lines.

关键词： high-voltage direct-current(HVDC)transmission lines corona discharge suppression dielectric-film-covered conductor composite field strength ion current density

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