±1100 kV直流线路极间距优化研究

Study on Optimization of Polarity Distance for the ±1 100 kV DC Transmission Line

±1100kV直流输电线路的极间距对塔头尺寸、杆塔重量、对地距离、走廊宽度、电磁环境等有很大影响。为了优化极间距,提高经济效益和社会效益,结合准东—华东±1100kV特高压直流工程,对电磁环境、空气间隙、绝缘子串长、导线对地距离、走廊宽度、杆塔重量等因素与极间距的关系进行了计算研究,采用年费用法进行了经济性分析,给出了多因素影响条件下的最优极间距。研究结果表明:±1100kV直流线路的极间距受绝缘子串长和空气间隙控制,因此宜从绝缘配置方面开展后续研究。

The polarity distance of the ±1100kV transmis- sion line has great influence on the tower head size, tower weight, distance In the ground, corridor width and electromag- netic environment. In order to optimize the polarity distance and improve economical and social benefits, the relationship be- Iween the electrtmmgnetic environment, air gap, insulator string length, dislance to the ground, corridor width, tower weight and polarity distance are studied in this paper based on the Zhun- dong- Huadong＋ 1100kV transmission line project. The mini- real annual cost method is used to analyze the economic condi- tions, anti the optimal polarity distance under the influence of multiple factors is given. It has been proved that the polarity dis- tance of the ±1100kV transmission line is controlled by the insu- lator string length and air gap, and on this basis, the fbllow-up stndy on lhe insulation configuratiun is recommended.