220kV同塔并架多回输电线的地面场强分析

Analysis on Ground Field Strength of Multiple-circuit Transmission Lines Erected on Same 220 kV Tower

针对目前 2 2 0kV同杆并架多回输电线路的特点 ,分析了处于 2 2 0kV输电线路下方的电场强度的计算方法。并根据对华东地区某模型系统的计算结果 ,讨论了不同类型的杆塔 ,导线相序排列方式以及部分线路停电时对地面场强的影响。经分析比较在选择杆塔时 ,以垂直型杆塔的地面场强最小 ;而在相序排列方式上 ,采用逆序方式排列 ,能减少地面场强 。

According to the characteristic of the multi -circuit transmission lines,the paper analysis the calculation method of the ele ctric field strength under the transmission lines.The paper also discusses the i mpaction of the type of the transmission pole,the difference of the wire arrange s and the power cut to the electric field strength.