电力系统保护与控制Issue(18)：105-110,6.
750 kV同塔双回不换位线路电流不平衡度研究
Analysis on current imbalance of un-transposed 750 kV double-circuit lines on the same tower
刘前进 1朱庆钢 1罗龙波1
作者信息
- 1. 华南理工大学电力学院,广东 广州,510640
- 折叠
摘要
Abstract
Transmission lines in some areas may have no condition to be transposed completely, because of shortage of the line corridor. And multi-circuit transmission lines, if un-transposed, will cause electrical three-phase parameters asymmetry. To solve this problem, the formulas of calculating the current imbalance on double-circuit lines without transposition are presented. Using PSCAD/EMTDC, the zero-sequence current unbalance and negative sequence current unbalance of a 750 kV double circuit lines without transposition are calculated in different types of tower, different phase sequence arrangement, different distance between the two loops and different line length. According to the simulation results, when the transmission line is short, the current imbalance can be controlled within a certain range by adopting the reverse phase sequence in the same tower window and adjusting loops distance properly. To avoid bad effect on the power system, transmission line must be transposed when the line is long.关键词
750 kV/同塔双回/输电走廊/不换位线路/电流不平衡度/相序排列Key words
750 kV/double-circuit transmission lines/transmission corridors/un-transposed line/current imbalance/phase sequence arrangement分类
信息技术与安全科学引用本文复制引用
刘前进,朱庆钢,罗龙波..750 kV同塔双回不换位线路电流不平衡度研究[J].电力系统保护与控制,2013,(18):105-110,6.
