Research and Application of UHVAC Gas-Insulated Transmission Line

被引：0
|
作者：
Li P. [1 ]
Yan X. [1 ]
Wang H. [1 ]
Zhang Q. [2 ]
Jin G. [1 ]
Gao Y. [4 ]
Mu S. [5 ]
机构：
[1] State Key Laboratory of Power Grid Environmental Protection(China Electric Power Research Institute), Haidian District, Beijing
[2] School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province
[3] PingGao Group Co., Ltd., Pingdingshan, 467000, Henan Province
[4] New Northeast Electric Group High Voltage Switchgear Co., Ltd., Shenyang, 110027, Liaoning Province
[5] Xi'an XD High Voltage Apparatus Co., Ltd., Xi'an, 710077, Shaanxi Province
来源：
| 1600年 / Power System Technology Press卷 / 41期
关键词：
Current flowing capability; Engineering application; Gas-insulated transmission line; Insulation design; Ultra high voltage;
D O I：
10.13335/j.1000-3673.pst.2017.1646
中图分类号：
学科分类号：
摘要：
Gas-insulated transmission line (GIL) possesses advantages of large transmission capacity, high reliability and environmental friendliness, but there are no mature products and application cases of UHV GIL worldwide. It is urgent to research its key technologies and engineering application. For engineering application of UHV GIL, insulation design, current flowing capability and SF6/N2 gas mixture scheme were investigated in this paper. Control principles for designing electric field strength of gap and insulator were put forward. Electric field distribution of tri-post insulator, the key insulation component of UHV GIL, was simulated and particle traps were set to improve insulation performance. Structure of electric contact of conductor rod was designed. Current flowing capability and temperature rise of UHV GIL was examined. To reduce environment effect, insulation characteristics, requirement of gas mixture ratio, gas pressure and design field strength of SF6/N2 gas mixture were discussed. Application of environmentally friendly gases for SF6 replacement was further prospected. Based on advancement of key technologies, typical structure of UHV GIL standard unit and its main technical parameters were obtained. Key components, including insulators, particle traps and enclosures were developed to assemble the UHV GIL standard unit. Relying on a real UHVAC transmission project, application solution of GIL replacing partly GIS busbar was conducted, inaugurating pilot engineering application of UHV GIL products in several UHV substations. In general, the key technologies of UHVAC GIL have been mastered in China, and these pilot applications provide important technical reference for UHV GIL crossing river in a GIL pipeline corridor project. © 2017, Power System Technology Press. All right reserved.
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页码：3161 / 3167
页数：6
相关论文
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