Interfacial Breakdown Characteristics and Its Physical Model of Cable Accessories under Multiphysics Fields - Details

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Abstract：

Due　to　the　issues　of　multi-layer　insulation　coordination,　the　interface　of　cable　accessories　is　prone　to　surface　discharge　and　breakdown,　which　are　the　weakest　link　in　the　power　cable　system.　The　discharge　model　of　composite　dielectric　interface　is　established.　This　article　investigates　the　variation　of　breakdown　voltage　at　the　interface　of　XLPE/SiR　double-layer　dielectric　under　different　interfacial　roughness　and　pressures.　The　results　indicate　that　the　higher　the　interfacial　roughness,　the　lower　the　interfacial　breakdown　voltage;　the　higher　the　interfacial　pressure,　the　higher　the　interfacial　breakdown　voltage.　In　addition,　considering　the　model,　the　quantitative　relationships　between　breakdown　voltage　and　roughness　and　pressure　are　established　respectively.　Finally,　the　interfacial　breakdown　mechanism　is　explained.　©　2023　IEEE.

Keyword：

Cable sheathing Electric breakdown Insulation Multiphysics

Community：

[ 1 ] [Zhang, Tianfeng]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China
[ 2 ] [Zhang, Yunxiao]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China
[ 3 ] [Zheng, Xin]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China
[ 4 ] [Lin, Wenxin]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China
[ 5 ] [Chi, Zhengnan]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China
[ 6 ] [Zhang, Jiarui]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350025, China