城网500 kV电缆与气体绝缘金属封闭输电线路操作过电压计算分析及比较  

Computational Analysis and Comparison of Operating Overvoltage Between Urban Grid 500 kV Cable and Gas-insulated Metal Closed Transmission Line

作　　者：王卿玮 叶键民 叶剑 WANG Qingwei;YE Jianmin;YE Jian(Shenzhen Power Supply Co.,Ltd.,Shenzhen 518000,China;Shanghai Electric Power Design Institute Co.,Ltd.,Shanghai 200025,China)

机构地区：[1]深圳供电局有限公司,深圳518000 [2]上海电力设计院有限公司,上海200025

出　　处：《电力与能源》2021年第6期622-625,653,共5页Power & Energy

摘　　要：高电压、长距离地下输电线路因对地电容很大,线路运行对设备绝缘配合提出了更高要求,对大电网安全稳定运行产生较大影响。基于典型城市电网结构和线路参数,通过地下线路的操作过电压仿真计算,对500 kV电缆和气体绝缘金属封闭输电线路(GIL)的操作过电压水平进行了比较分析,并提出了抑制操作过电压的建议与措施。High voltage and long distance underground transmission lines have higher requirements for equipment insulation due to their large capacitance to the ground, which has great influence on the safe and stable operation of large power grid. Based on typical urban power grid structure and line parameters, the operating overvoltage levels of 500 kV cable and Gas-insulated Metal Closed Transmission Lines(GIL) are compared and analyzed through simulation calculation of operating overvoltage levels of underground lines, and some suggestions and measures for controlling operating overvoltage are put forward.

关 键 词：城市电网 电缆 气体绝缘金属封闭输电线路 操作过电压 

分 类 号：TM595[电气工程—电器] TM75