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气体绝缘金属封闭输电线路的研究现状及应用前景

DOI: 10.13336/j.1003-6520.hve.2015.05.007, PP. 1466-1473

Keywords: 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

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Abstract:

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。

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