基于错层终端塔的220kV双层构架出线方式研究

Research on Outgoing Line Schemes of 220 kV Double Layer Framework Based on Staggered Terminal Tower

与220 kV单层构架出线不同,双层构架采用常规终端塔出线,将导致大部分相序排列组合的导线相间距离不满足规范要求,成为变电站布置双层构架的制约因素。通过采用三维坐标转换方法,编制进线档相间距离简易计算程序。针对220kV双层构架采用常规终端塔出线相序适用率低的问题,提出适用于错层终端塔的解决方案,提高了双层构架出线相序排列的自由度。

Different from the outgoing line schemes of single-layer framework,the double-layer framework with the conventional terminal tower outlet will result in the phase-to-phase distance of most phase sequence combinations not meeting the specification requirements.It becomes a constraint factor for the promotion of double layer framework.According to the 3D space transformation technology,the paper has compiled a simple calculation program for the phase distance of lead-in span.Aiming at the problem that the double-layer framework with the conventional terminal tower outlet adopts the low rate of the phase sequence,the solution of the staggered-layer terminal tower is proposed,and the degree of freedom of the phase sequence arrangement is improved.