760kN绝缘子双联耐张串金具研究

为提高特高压输电线路工程安全可靠性和经济合理性,减少安装和运行维护工作量,适应绝缘子向提高负荷等级方向发展的趋势,开发了760 kN绝缘子耐张串非标金具。采用760 kN绝缘子双联耐张串替代550 kN绝缘子三联耐张串,减少了绝缘子和金具的数量,缩短了两外挂点间的距离,改善了铁塔受力条件,提高了铁塔的抗冰、抗风和抗震能力。该研究成果已应用于锦屏—苏南±800 kV直流特高压输电线路工程中。

Research on the Fittings for Double Strain Insulator-strings of 760 kN

In order to improve the reliability and the economic rationality of EHV transmission projects, reduce installation and maintenance, and adapt to the development trend of raising load about insulator, the duplex strain insulator-string fitting for 760 kN is developed. The number of insulators and fittings reduced, the distance between the two hard points shortened, and the stress condition and the ice-resistant, wind-resistant, vibration-resistant capacity of tower improved through substituting 760 kN double strain insulator-strings for 550 kN triple strain insulator-strings. The research productions had been successfully applied to the Jinpin-Sunan _＋800 kV EHV DC Transmission Project.