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聚合物高压直流电缆系统的界面处理(英文) 被引量:1

Polymeric HVDC Cable Systems— Dealing with Interfaces
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摘要 The developments in power transmission via HVDC networks are fast,especially in Western Europe and China.The challenges that we are confronted with are huge and considerable research and development efforts are required.Special attention is needed for high voltage direct current(HVDC)and ultra-high voltage dc(UHVDC)underground cables.For the highest voltage levels,we are still dependent upon classic technology based on mass-impregnated paper used in line commutated converter(LCC)systems.Gradually,more and more polymeric type cables are appearing on the market,as yet mainly for voltage source converter(VSC)systems.For financial,environmental and technical reasons the full focus is now on polymeric type cables,for use in LCC or VSC systems.In this paper,a closer look is taken at the interfaces in polymeric cable systems,i.e.in the cables and in the cable accessories.In the design process,we are challenged by the presence of interfaces from an electrical and thermal point of view.In the field of electrical insulation,the interfaces between different materials are generally considered the weakest parts of the equipment and under DC stresses the situation becomes even more complex due to the charge dynamics at the interface.Indeed,the design of(U)HVDC accessories has become a challenge if not a problem.This paper focuses on some of the important electrical and thermal aspects of interfaces in HVDC polymeric cables.It is discussed where we lack knowledge and where we may benefit from other scientific The developments in power transmission via HVDC networks are fast, especially in Western Europe and China. The challenges that we are confronted with are huge and considerable research and development efforts are required. Special attention is needed for high voltage direct current(HVDC) and ultra-high voltage dc(UHVDC) underground cables. For the highest voltage levels, we are still dependent upon classic technology based on mass-impregnated paper used in line commutated converter(LCC) systems. Gradually, more and more polymeric type cables are appearing on the market, as yet mainly for voltage source converter(VSC) systems. For financial, environmental and technical reasons the full focus is now on polymeric type cables, for use in LCC or VSC systems. In this paper, a closer look is taken at the interfaces in polymeric cable systems, i.e. in the cables and in the cable accessories. In the design process, we are challenged by the presence of interfaces from an electrical and thermal point of view. In the field of electrical insulation, the interfaces between different materials are generally considered the weakest parts of the equipment and under DC stresses the situation becomes even more complex due to the charge dynamics at the interface. Indeed, the design of(U)HVDC accessories has become a challenge if not a problem. This paper focuses on some of the important electrical and thermal aspects of interfaces in HVDC polymeric cables. It is discussed where we lack knowledge and where we may benefit from other scientific fields
出处 《高电压技术》 EI CAS CSCD 北大核心 2015年第4期1104-1113,共10页 High Voltage Engineering
关键词 HVDC系统 地下电缆 接口处理 高分子 高压直流输电 VSC系统 聚合物型 设计过程 HVDC polymeric cable accessories space charge thermal resistance interfaces
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