750 kV紧凑型交流输电关键技术研究

介绍了750kV同塔双回紧凑型交流输电关键技术研究的重点成果。研究了在西北高海拔地理环境下包括过电压与绝缘配合、无功补偿、潮流不平衡及导线换位、导线选型及排列方式、外绝缘特性试验、电磁环境、杆塔及基础、雷电性能、电晕特性及海拔高度影响、绝缘子串形式及力学特性、绝缘子串电位分布及均压环优化配置、相间间隔棒配置及机电特性试验、导线舞动及脱冰跳跃抑制措施、带电作业、继电保护15大项技术内容。该关键技术研究属国际首创性科研工作，填补了在高海拔地区750kV紧凑型输电技术的空白。

ey Technology Research on 750 kV Compact AC Transmission Line

The main conclusions of the key technology research on 750 kV single tower double-circuit compact transmission line is introduced in this paper. At high altitude in Northwest China,15 technologies are studied, including over-voltage and insulation coordination, reactive power compensation, power flow unbalance and phases changing, line conduct choose and its sequence, external insulation experiment, electromagnetic surrounding, tower and its base, lighting characteristics, corona and its characteristics according to the elevation, insulators construction and its mechanical characteristics, insulators' potential and grading rings, spacer between phases and its electro-mechanical characteristics, lines galloping and ice-off jumping, live line work and relays. Research on the key technologies is creative internationally, and fills the blank in 750 kV compact transmission line at high altitude.