双联绝缘子串在连续上下山时的串长调整计算

Length Adjustment Calculation of Double Insulator Strings in Continuous Up-and Downhill

输电线路在连续上下山时,如果导线绝缘子串为2个等长单联串并联悬挂,则2串绝缘子会受力不均,严重时还会有1串卸载。为使2串绝缘子受力均衡,需对串长进行调整。按悬链线公式方法和近似方法对串长的调整值进行计算,并对串长调整后的绝缘子受力情况进行估算,可知按2种方法计算调整均可满足工程要求。

When transmission lines go up- and downhill continuously, if two equal length insulator strings are connected and suspended in series, force acting on both strings will be imbalanced, sometimes one string may unload. To make balanced force on both strings, their length must be adjusted. this paper calculates the adjustment using Catenary equation and approximate method and estimates force on insulators after adjustment. Both methods meet engineering requirements.