摘要
220/110kV同塔六回塔型的选择,需重点分明地考虑以下几点:铁塔结构清晰、受力与传力应尽可能简单,并能满足分期架设和带电作业的要求;能满足耐雷水平要求,并尽可能降低双回乃至多回同时跳闸率;走廊宽度不宜过大,铁塔横担不宜太长,施工、运行及维护方便;同时,尽可能优化杆塔结构,以降低铁塔耗钢量;还应对同塔多回路运行情况:断线、倒塔、风偏以及雷击跳闸率、单回跳闸率、多回同期跳闸(异名相故障等)的跳闸率等进行深入调查、分析研究。
In 220/110 kV six-circuit line tower selection, it is necessary to emphasize following considerations: tower structure must be clear, force applied and transferred must be as simple as possible, and it must meet staged stringing and live-line operation requirements; it must meet lightning withstand requii'ements and reduces double- or muhi-circuit trip rates as far as possible; the corridor should not be too wide, cross ann should not be too long, and should be easy for construction, operation, and maintenance; in the mean time, the pole and tower structure should be optimized as far as possible to reduce steel consumption. Besides, in -depth investigations and analysis of line broken during operation, tower collapse, windage, and lighting-caused trip rate, single- and multi-circuit trip rates, multi-circuit synchronized trip (different phase failure) should be carded out.
出处
《电力建设》
2008年第8期50-54,共5页
Electric Power Construction
关键词
输电线路
六回路同塔
设计
transmission line
six-circuit line
design