一种新型的220kV垂直排列四回路塔性能研究  

Research on Performance of an Innovative 220 kV Vertical Arranged Four Circuit Transmission Tower

作　　者：陈文广[1] 朱映洁[1] 潘春平[1] 

机构地区：[1]中国能源建设集团广东省电力设计研究院,广东广州510663

出　　处：《广东电力》2013年第1期68-73,共6页Guangdong Electric Power

摘　　要：针对目前常规的220 kV垂直排列四回路塔在施工放线过程中可能出现牵引下层导线的钢丝绳刮伤上层导线的情况,提出了一种新型的垂直排列四回路塔塔头布置方案,并与常规四回路塔在塔重和占用走廊宽度、绕击和反击跳闸率等方面进行了对比分析。分析结果表明:这种新型的四回路塔不仅很好地避免了上述施工过程中的导线损伤问题,而且在塔重、占用走廊宽度以及反击跳闸率等方面均比常规四回路塔优越;但在相同防雷保护角的前提下其绕击跳闸率略高于常规四回路塔。建议适当减小该塔型的防雷保护角,在相同的雷击跳闸率下其塔重和占用走廊宽度仍比常规四回路塔优越,可推广使用。Aiming at the case of scratch of upper conductor by steel wire rope for reason of dragging lower conductor when laying conductor during the process of construction of present conventional 220 kV vertical arranged four circuit transmission tower, this paper proposes a new arrangement scheme for vertical arranged four circuit tower head, compares and analyzes tower weight, aisle width, shielding failure trip-out rate and back striking tripping rate. The analysis result shows that this kind of new four circuit transmission tower can well avoid damage of conductor in construction and have obvious advantages than conventional four circuit transmission tower, but with the same lightning protection angle, its shielding failure trip-out rate is comparatively higher than conventional four circuit transmission tower. It suggests to properly reduce lightning pro- tection angle of this tower while its tower weight and aisle width is more advantageous than conventional four circuit trans- mission tower under the same lightning stroke trip-out rate and this method is feasible to be spread and used.

关 键 词：四回路塔 绕击跳闸率 反击跳闸率 塔重 走廊宽度 

分 类 号：TM753[电气工程—电力系统及自动化]