荆—枫±500kV同塔双回直流线路的极导线布置研究

Study on Polar Conductor Arrangements of ±500 kV Jing-Feng Double Circuits DC Transmission Line Project from Jingmen to Fengjing

根据直流输电线路的主要设计原则和特点,通过仿真计算,从电磁环境、过电压水平、雷电性能及线路运行维护等方面对荆—枫±500kV同塔双回直流线路的4种极导线布置方案进行了分析比较,并确定了最佳极导线布置方案。所得结果已用于荆—枫±500kV同塔双回直流输电线路设计中,且工程项目已良好运行超过1年,验证了该设计方案的实用性和有效性。

According to the main design principles and characteristics of DC transmission lines, simulation calculations are carried out to study the electromagnetic environment, overvoltage level, lightning performance, operation and mainte- nance of the transmission line and other aspects. Four different polar conductor arrangements of ± 500 kV Jing-Feng double circuit DC transmission lines are analyzed and compared. And then the optimal conductor arrangement mode is de- termined. The relevant results have been applied to the design of±500 kV double double circuit DC transmission line project from Jingmen to Fengjing, and the project has run well over one year, which demonstrates the validity and practi- cability of the design scheme.