1000 kV特高压线路中绝缘子片数的确定

Determination of the Number of Insulators in 1000 kV UHV Transmission Lines

针对我国正在建设和运行的1000 kV交流特高压线路中使用的金具串,采用泄漏比距法和污耐压法按照工频电压选择绝缘子片数,提出了耐张串推荐采用的绝缘子片数和悬垂串合成绝缘子的结构长度及爬电距离。该研究可提高1000 kV特高压线路设计水平,从而提供更加安全可靠的运行维护和合理的工程造价。

For the fittings used in 1000 kV AC UHV line under construction and operation in China,the number of insulators is selected according to the power frequency voltage by the methods of leakage ratio distance and pollution withstand voltage.The number of insulators recommended for tensile string resistance and the structural length and creepage distance of overhanging string synthetic insulators are put forward.This study can improve the design level of 1000 kV UHV lines,so as to provide more safe and reliable operation and maintenance and give reasonable project cost.