直流电场中高压电缆绝缘电树枝劣化研究现状  

Research Status of Electrical Tree Degradation in High Voltage Cable Insulation in DC Electric Field

作　　者：苏金刚 杜伯学 李进 李志坚 SU Jingang;DU Boxue;LI Jin;LI Zhijian(Electric Power Research Institute of State Grid Hebei Electric Power Supply Co.,Ltd.,Shijiazhuang,Hebei 050000,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;Electric Power Research Institute of State Grid Tianjin Electric Power Supply Co.,Ltd.,Tianjin 300384,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050000 [2]天津大学电气自动化与信息工程学院,天津300072 [3]国网天津市电力有限公司电力科学研究院,天津300384

出　　处：《广东电力》2019年第12期66-72,共7页Guangdong Electric Power

基　　金：国家自然科学基金项目(51537008)

摘　　要：高压直流电缆作为直流输电的关键设备,其绝缘电树枝劣化是影响高压直流系统安全、可靠运行的重要因素。高压直流电缆运行条件复杂,承受雷电入侵、操作过电压等产生的脉冲电压作用以及非线性电气设备产生的谐波影响;同时,电树枝的引发、生长与电荷输运过程密切相关,且依赖于复杂电场作用。对此以高压直流电缆绝缘为对象,综述直流电场中电荷输运与电树枝劣化规律和作用机理,以期为高压直流电缆绝缘设计提供实验依据和理论支撑。As the key electrical equipment of DC transmission,the electrical tree in the insulation materials of HVDC cable is an important factor to affect safe and reliable operation of HVDC cable system.The operating conditions of HVDC cable are complex,and HVDC insulation materials are not only affected by the pulse voltage such as lighting invasion,operating overvoltage,but also the harmonic voltage generated by nonlinear electrical equipment.The initiation and growth of electrical tree is closely related to charge transport process and depended on effect of complicated electric field.This paper takes the HVDC cable insulation as an object and summarizes charge transport and electrical tree degradation mechanism in the DC electric field so as to provide experimental basis and theoretical support for insulation design of HVDC cable.

关 键 词：高压直流电缆 电树枝 脉冲电压 复合电压 电荷输运 

分 类 号：TM247[一般工业技术—材料科学与工程]