500/220kV混压同塔四回线路电磁环境的仿真分析  

Simulation Analysis on Electromagnetic Environment of Quadruple-Circuit Transmission Lines Belonging to Different Voltage Classes on the Same Tower

作　　者：张晓[1] 贾振宏[2] 吴锁平[2] 吴建宏[3] 王坚敏[4] 陈光[1] 周浩[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]江苏省电力设计院,江苏省南京市210098 [3]江苏省电力公司,江苏省南京市210098 [4]浙江省宁波电业局,浙江省宁波市315000

出　　处：《电网技术》2010年第5期207-211,共5页Power System Technology

基　　金：江苏省电力公司2007年重点科研项目(J2007029)

摘　　要：为评估500/220kV混压同塔四回输电线路电磁环境的影响,用CDEGS软件仿真计算了典型塔型线路对应的工频电场、工频磁场、无线电干扰及可听噪声值,并分析了导线排列方式、导线高度等因素对线路下方电磁环境的影响。计算结果表明,在规程要求的导线最低对地高度下,工频磁场、无线电干扰、可闻噪声值均满足国家环保标准要求,而工频电场是决定线路电磁环境是否达标的关键性因素。按照工频电场4kV/m的限值提出线路走廊宽度的建议值,并对比给出了2典型塔型线路对应的最优导线排列方式。最后,提出改善线路下方工频电场的措施。To evaluate the impacts of electromagnetic environment due to the arrangement of quadruple-circuit transmission lines belonging to voltage classes of 500 kV and 220 kV on the same tower, the strength of power frequency electric field and magnetic field, the values of the radio interference （RI） and audible noise （AN） corresponding to typical tower type and transmission lines are simulated and calculated by the software CDEGS, meanwhile the influences of such factors as arrangement of conductors and their heights on electromagnetic environment beneath the transmission lines are analyzed. Calculation results show that under the minimum wire-to-ground height of conductors specified in the rule, all the strength of power frequency magnetic field, and the values of RI and AN can satisfy the requirements specified in national environmental standards, however the strength of power frequency magnetic field is the key factor to judge whether the electromagnetic environment of transmission line conforms to the specified standard. According to the specified limitation 4 kV/m for power frequency electric field the recommended width of the corridor is proposed and on this basis the optimal conductor arrangement modes corresponding to two typical tower types and transmission lines are given. Finally, several suggestions to improve the power frequency electric field beneath transmission lines are put forward.

关 键 词：同塔四回线路 电磁环境 工频电场 线路走廊:导线排列方式 

分 类 号：TM726[电气工程—电力系统及自动化]