1000 kV特高压变电站软母线施工放线下料长度计算的探讨

在1000kV特高压变电站中,软母线采用的绝缘子串片数、重量比以前增加很多,绝缘子串长度较长,绝缘子串对导线弧垂的影响非常大,导线下料长度的计算属于短档距长绝缘子串问题。对这一问题进行了初步探讨,建立了计算的数学模型,并把计算模型应用到工程实践中,指导特高压变电站软母线施工导线下料长度的计算,工程实践证明这种方法是基本可行的,从而也为交流特高压工程软母线施工导线下料长度计算提供了有益的经验。

Discussion on the calculation of conductor fitting length in the busbar construction of 1000 kV UHV transformer substation

In the 1000kV UHV transformation substation,the number and weight of insulator string is increased more and its length is longer.The busbar sag is effected more by the insulator string.The conductor fitting length is belonged to the problem of long insulator string and short distance.The problem is discussed in this paper.The model is established and applied in the project practice to direct the calculation of the conductor fitting length.The feasiblity is tested by the practical application,which provides a good experience for the calculation of conductor fitting length in the busbar of UHV transformer substation.