特高压气体绝缘金属封闭输电线路管廊接地方案研究  

Grounding Grid Design Scheme of UHV GIL Tunnel Project

作　　者：熊贇超 张鹏飞 王卫华 黄宝莹 乐党救 腾云 魏翀 XIONG Yun-chao;ZHANG Peng-fei;WANG Wei-hua;HUANG Bao-ying;LE Dang-jiu;TENG Yun;WEI Chong(East China Electric Power Design Institute Co.,Ltd.of CPECC,Shanghai 200001,China;China Electrical Power Research Institute Co.,Ltd.,Beijing 100192,China;Electric Power Planning&Engineering Institute,Beijing 100120,China;Jiangsu Province Electrical Power Research Institute Co.,Ltd.,Nanjing 210036,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200001 [2]中国电力科学研究院有限公司,北京100192 [3]电力规划设计总院,北京100120 [4]江苏省电力科学研究院有限公司,江苏南京210036

出　　处：《电力勘测设计》2020年第11期35-41,共7页Electric Power Survey & Design

摘　　要：苏通气体绝缘金属封闭输电线路(gas-insulated metal-enclosed transmission line,GIL)综合管廊工程在淮南—南京—上海1000 kV交流特高压输变电工程长江大跨越位置建设两回GIL,额定电压1100 kV,额定电流6300 A;GIL布置在管廊内穿越长江,两端通过地面引接站与特高压线路连接,分别引接至1000 kV泰州站和1000 kV苏州站,是世界上电压等级最高、距离最远、输送容量最大的GIL输电工程。本文主要介绍了苏通工程的接地设计方案,提出了管廊内利用自然接地体的设计方法,提出了完整的GIL管廊接地设计方案,并通过苏通工程对设计方案进行了仿真和试验验证。Sutong GIL utility tunnel project is a part of Huainan—Nanjing—Shanghai 1000 kV UHVAC power transmission project.Two circuit GIL will be arranged in a tunnel under the Yangtze River and connected to the 1100 kV lines which extending to the Taizhou 1000 kV substation and the Suzhou1000 kV substation.The rated voltage is 1100 kV and the current of GIL is 6300 A.As a GIL project,besides the highest voltage level,the project also has longest length and largest transmission capacity in the world.In this paper,the earthing program of the project is introduced,the application method of natural earth and a complete application scheme used in a GIL tunnel engineering,which is verified in the Sutong GIL utility tunnel project.

关 键 词：GIL管廊 接地设计 自然接地体 接地阻抗 接触电势 跨步电势 

分 类 号：TM726[电气工程—电力系统及自动化]