特重冰区特高压交流输电线路相间距研究

Study on Phase Spacing of Ultra-High Voltage AC Transmission Lines in Extra-heavy Ice Areas

通过对40 mm、60 mm特重冰区1000 kV交流输电线路电气间隙值、电磁环境限值等方面进行分析,提出了1000 kV特高压交流输电线路导线相间距的计算方法,并得到结论。经研究,耐张塔相间距尺寸主要由电磁环境控制,而电磁环境主要由可听噪声控制;相间距(横向水平空间)对电磁环境的敏感度比对地距离(竖向垂直空间)大。所探讨的计算方法和计算结论可为特高压交流输电线路设计提供参考。

This paper conducts an analysis and study on the electrical clearance and electromagnetic environment limits of ultra-high voltage alternating current(UHVAC)transmission line conductors in 40 mm and 60 mm extra-heavy ice areas.It proposes a calculation method and conclusions for the phase spacing of 1000 kV UHVAC transmission line conductors.The study shows that the phase spacing of tension towers is primarily controlled by the electromagnetic environment,which is mainly influenced by audible noise.Phase spacing(horizontal space)is more sensitive to the electromagnetic environment than ground clearance(vertical space).The calculation method and conclusion discussed can provide reference for design of UHVAC transmission lines.