特高压交流GIL输电技术研究及应用

发布时间：2018-02-10 12:24

本文关键词： 特高压气体绝缘输电线路绝缘设计通流能力工程应用　出处：《电网技术》2017年10期 　论文类型：期刊论文

【摘要】：气体绝缘输电线路(gas-insulated transmission line,GIL)具有传输容量大、运行可靠性高、环境友好的特点,国内外尚无特高压GIL成熟产品和应用案例,亟需开展其关键技术和工程应用研究。针对特高压GIL工程应用开展了绝缘设计、通流能力和SF6/N2混合气体方案研究,提出了间隙和绝缘子设计场强控制原则,对特高压GIL关键绝缘件(三支柱绝缘子)的电场分布做了仿真计算;提出了导电杆电联结触头结构,校核了GIL通流温升性能;针对日益提升的环保要求,分析了SF6/N2混合气体绝缘特性、混合比要求、气压和设计场强,并对SF6替代的环保气体应用进行了展望。根据上述技术分析,给出了特高压GIL标准单元典型结构和主要技术参数,分析了绝缘件、微粒陷阱和外壳等关键组部件特点。依托淮南—南京—上海特高压交流输电工程,在特高压变电站开展了特高压GIL替代气体绝缘金属封闭开关设备(gas insulated switchgear,GIS)母线应用,并在南京、苏州、泰州特高压变电站实现了特高压GIL产品的工程示范应用。总体上,国内已掌握特高压交流GIL关键技术,为苏通GIL综合管廊工程的特高压GIL过江应用提供了较好的技术基础。
[Abstract]:Gas-Insulated transmission Line Gill (GIGL) has the characteristics of large transmission capacity, high reliability and environmental friendliness. There are no mature UHV GIL products and application cases at home and abroad. It is urgent to develop its key technology and engineering application research. For UHV GIL engineering application, the insulation design, current transfer capacity and SF6/N2 mixed gas scheme are studied, and the control principles of gap and insulator design field strength are put forward. The electric field distribution of the key insulation parts (three-pillar insulators) of UHV GIL is simulated, and the electric contact structure of conductive rod is proposed to check the current current temperature rise performance of GIL. The insulation characteristics, mixing ratio, pressure and design field strength of SF6/N2 mixed gas are analyzed. The application of environmental protection gas replaced by SF6 is prospected. According to the above technical analysis, the typical structure and main technical parameters of UHV GIL standard unit are given. The characteristics of the key components, such as insulating parts, particle traps and shells, are analyzed. Based on the Huainan Nanjing-Shanghai UHV AC transmission project, UHV GIL has been applied in UHV substation instead of gas insulated switchgear, and UHV GIL has been demonstrated in Nanjing, Suzhou and Taizhou UHV substations. In general, UHV GIL products have been demonstrated in Nanjing, Suzhou and Taizhou UHV substations. The key technology of UHV AC GIL has been mastered in China, which provides a good technical basis for the application of UHV GIL across the river in Sutong GIL integrated pipe gallery project.
【作者单位】：电网环境保护国家重点实验室(中国电力科学研究院);西安交通大学电气工程学院;平高集团有限公司;新东北电气集团高压开关设备有限公司;西安西电开关电气有限公司;
【基金】：国家重点研发计划项目(2017YFB0902500) 国家电网公司科技项目(“特高压长距离GIL绝缘、通流、密封可靠性综合提升能力分析研究”)~~
【分类号】：TM75

【相似文献】