气体绝缘金属封闭输电线路的研究现状及应用前景  

Research Status and Prospect of Gas-insulated Metal Enclosed Transmission Line

作　　者：齐波[1,2] 张贵新[3] 李成榕[1,2] 高春嘉 张博雅[3] 陈铮铮[4] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]清华大学电机工程与应用电子技术系,北京100084 [4]中国电力科学研究院,武汉430074

出　　处：《高电压技术》2015年第5期1466-1473,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2014CB239500);国家电网公司科技项目(EPRIGYJSKF(2013)2441)~~

摘　　要：气体绝缘金属封闭输电线路(GIL)由于其传输容量大、损耗小、安全性高以及环境友好等特点能够代替传统的架空线路或者电力电缆,可以用于大容量、长距离的电能传输。该研究概述了GIL设备的发展历史,介绍了GIL的特点和典型应用场合,总结了国内外GIL的应用现状以及关键技术问题,从制造加工和应用场合2个方面分析了GIL的发展前景。可以看出,经过40余a的发展,交流GIL设备的制造工艺日益成熟,结构更加紧凑,敷设方式更加多样,运行更加安全可靠,但受制于表面电荷积聚对绝缘性能的影响机理尚不明朗以及制造成本过高等因素,直流GIL设备的发展相对较为缓慢。随着电力行业的发展和科技的进步,未来GIL设备的研究会在绝缘件表面电荷特性、绝缘优化、新型替代气体以及低成本制造等关键技术问题方面取得突破,必将推动GIL设备获得更为广泛的应用,为我国保障电网"清洁、安全、自愈、经济、互动"的智能化运行提供必要的技术支撑。Gas insulated metal enclosed transmission line（GIL） is widely applied in high-power, long-distance transmis- sion system thanks to its larger capacitance, lower transmission losses, and greater safety and environmental friendliness in comparison with traditional overhead transmission lines and cables. We reviewed GIL development＇s history, intro- duced its features, typical application situations and development status in and outside China, summarized key GIL technologies, and analyzed its development prospect from both manufacture and application perspectives. It is revealed that, with four decades of development, AC GILs have achieved comparatively mature manufacturing techniques, better structure design, more diversified installment, and greater reliability in real operation, whereas DC GILs have lagged rela- tively behind due to inadequate knowledge on the effect of surface charge accumulation on insulation performance as well as higher manufacturing costs. With the overall development of power industry and advancement of science and technol- ogy, future GIL studies are expected to make influencing breakthroughs in key technologies covering insulation surface charge, insulation optimization, alternative gas, as well as low-cost manufacturing. Wider application of GIL apparatus should provide necessary technical backstopping in safeguarding the operation of a clean, safe, self-recovery, economic and interactive smart grid in China.

关 键 词：气体绝缘金属封闭输电线路 直流输电 表面电荷 替代气体 绝缘特性 走廊共享 

分 类 号：TM75[电气工程—电力系统及自动化]