电网技术Issue(9)：2541-2546,6.
1000 kV特高压交流复合绝缘子耐张串均压特性研究
Study on Optimization Characteristic of Composite Tension Insulators for 1 000 kV UHVAC Lines
李庆峰 1邓桃 2毛艳 2李晟3
作者信息
- 1. 清华大学 深圳研究生院，广东省 深圳市 518055
- 2. 中国电力科学研究院，北京市 海淀区 100192
- 3. 华北电力大学 电气与电子工程学院，北京市 昌平区 102206
- 折叠
摘要
Abstract
Due to the different stray capacitance at conductor and grounding top of composite insulators under AC voltage, the electric potential distribution along the insulators is un-uniform. The three-dimensional finite element method is used to calculate the potential distribution and electric field distribution of line-shape 4×550 kN composite tension insulators for 1 000 kV UHVAC transmission lines, where single and double circuit is calculated respectively. The impacts of structural parameters of grading ring, including shielding depth, ring diameter and tube diameter, on the distribution of electric field are compared and a recommended configuration scheme of grading ring is suggested. Calculation results show that when peak phase voltage is applied to the middle phase, the electric field strengths at key positions reach to their maximum; on single circuit 1 000 kV transmission line, the maximum electric filed strength on grading ring surface and insulator surface are 2.06 kV/mm and 0.33 kV/mm respectively, while they are 1.8 kV/mm and 0.31 kV/mm of double circuit 1 000 kV transmission lines respectively. All the calculation results under the suggested grading ring configuration meet the electric filed requirements, which are 2 kV/mm on grading ring surface under peak phase voltage and 0.4 kV/mm on insulator surface under effective value.关键词
特高压交流输电线路/复合绝缘子耐张串/有限元/均压特性Key words
UHVAC transmission lines/composite tension insulators/finite element/optimization characteristic分类
信息技术与安全科学引用本文复制引用
李庆峰,邓桃,毛艳,李晟..1000 kV特高压交流复合绝缘子耐张串均压特性研究[J].电网技术,2013,(9):2541-2546,6.
