摘要
同塔双回线路电气不平衡度不仅与导线空间布置有关,还跟相序排列方式有关。因此必须利用导线换位,并且采用适当的相序排列方式以及换位方向来减小线路的不平衡度。对于750kV兰州东—平凉—乾县同塔双回送电线路工程,推荐导线排列方式采用逆相序排列,并且兰州东—平凉段进行一次反向全换位,平凉—乾县段进行一次反向全换位,即可满足线路不平衡度限值的要求。
The electric imbalance of 1 -tower double-circuit transmission line depends on both conductor spatial arrangement and phase sequence. Therefore, to minimize line imbalance, conductor transposition, as well as proper phase sequence and transposition orientation have to be used. For the east Lanzhou-Pingliang-Qian County 750 kV 1 -tower double-circuit transmission line project, it is recommended that conductors should be arranged in reverse phase sequence, and two reverse transpositions ,which are applied in east Lanzhou-Pingliang section and Pingliang-Qian County section respectively, should be used to meet the line imbalance limit.
出处
《电力建设》
2007年第6期27-29,31,共4页
Electric Power Construction
关键词
750
kV同塔双回输电线路
不平衡度
换位
相序排列
750 kV 1-tower double-circuit transmission line
imbalance
transposition
phase sequence
