电网技术2018，Vol.42Issue(6)：2009-2015,7.DOI:10.13335/j.1000-3673.pst.2017.2791
750 kV酒杯型复合横担杆塔电场仿真计算及电晕试验
Electric Field Computation and Corona Test for Composite Cross-Arms in 750kV Cup Type Tower
杨林 1谭浩文 1王加龙 2彭宗仁2
作者信息
- 1. 西北电力设计院有限公司,陕西省 西安市 710075
- 2. 电力设备电气绝缘国家重点实验室(西安交通大学),陕西省 西安市 710049
- 折叠
摘要
Abstract
Composite cross-arm of 750kV cup type tower bears both electric and mechanical loads. Owing to its high operation voltage and very complex insulation structure, potential and electric field distributions of composite cross-arm are extremely uneven. It may affect long-term stable operation of transmission line. Using three dimension finite element method (FEM), this paper presented research on voltage equalizing characteristics of composite cross-arms in 750 kV cup type tower. Computation model was established. The potential and electric field distributions of middle phase and side phase under several design schemes were computed. The program for grading and shielding devices was designed and then optimized. The electric field computation results showed that the electric field strengths on key positions were within permitted range. Corona tests showed that no visible corona discharge was found from insulators or fittings when the applied voltage was 1.2 times of test voltage. The design of the grading and shielding devices can be applied in actual projects.关键词
酒杯塔/复合横担/均压/有限元/电晕试验Key words
cup type tower/composite cross-arm/voltage-sharing/finite element method/corona test分类
信息技术与安全科学引用本文复制引用
杨林,谭浩文,王加龙,彭宗仁..750 kV酒杯型复合横担杆塔电场仿真计算及电晕试验[J].电网技术,2018,42(6):2009-2015,7.
