高压直流GIL设备绝缘关键技术研究综述  

Review of Key Insulation Technologies of HVDC GIL

作　　者：张长虹[1] 张博雅 李明洋 李奕萱 李兴文[2] 吕金壮[1] 王志刚 黎卫国[1] 杨旭 ZHANG Changhong;ZHANG Boya;LI Mingyang;LI Yixuan;LI Xingwen;LÜJinzhuang;WANG Zhigang;LI Weiguo;YANG Xu(Maintenance&Test Center of EHV Power Transmission Company,China Southern Power Grid,Guangzhou 510663,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Pinggao Group Co.,Ltd.,Pingdingshan 467001,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司检修试验中心,广州510663 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [3]平高集团有限公司,平顶山467001

出　　处：《高电压技术》2023年第3期920-936,共17页High Voltage Engineering

基　　金：国家自然科学基金(52277162,51907154)。

摘　　要：直流GIL具有输送容量大,占地面积小,可靠性高,受外界环境影响小等优势,在特殊环境中具有广泛的应用前景。然而直流电压下GIL内部气固界面电荷积聚及金属微粒的存在会导致GIL内部电场畸变、绝缘性能下降,甚至诱发沿面闪络,是限制直流GIL发展的重要因素。因此,论文总结了近年来关于直流GIL绝缘关键技术和GIL设备研制的相关研究,从气固界面电荷积聚机理与调控方法,GIL中金属微粒对绝缘性能的影响,绝缘材料沿面耐电性能,新型环保气体在直流GIL中的应用,直流GIL设备研制与试验和特高压直流GIL研制关键技术等6个方面进行总结评述,为高压直流GIL研发提供参考。HVDC GIL with the advantages of large transmission capacity,small footprint and high reliability has a wide application prospect in the special geographical environment.However,the accumulated gas-solid interface charge and the existence of metal particles in GIL are essential factors which lead to the electric field distortion and even the surface flashover and thus limit the development of DC GIL.In this paper,we summarize and review the related research progress in surface charge accumulation mechanism and suppression methods,metal particles in GIL,surface flashover characteristics,application of eco-friendly gases in DC GIL,HVDC GIL manufacturing and testing,and key technologies for developing UHVDC GIL.The paper provides a reference to the design and development of DC GIL equipment.

关 键 词：直流GIL 绝缘技术 表面电荷积聚 沿面闪络 金属微粒 特高压直流 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM75