Multi-physical Field Coupling Simulation and Verification of Tri-post Insulator on Environment-friendly 1 100 kV GIL

被引：0
|
作者：
Gao L. [1 ]
Jia Y. [1 ]
Ji S. [1 ]
Cheng Y. [2 ]
Li X. [2 ]
Li Z. [3 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] Xi'an Xidian Switch Electric Co., Ltd., Xi'an
[3] China Electric Power Research Institute, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 03期
基金：
国家重点研发计划;
关键词：
C[!sub]4[!/sub]F[!sub]7[!/sub]N/CO[!sub]2[!/sub; Environment-friendly GIL; Magnetocaloric fluid coupling; Thermoelectric coupling; Tri-post insulator;
D O I：
10.13336/j.1003-6520.hve.20190410033
中图分类号：
学科分类号：
摘要：
In order to develop tri-post insulators for environmental-friendly 1 100 kV gas-insulated transmission line (GIL), a complete multi-physical field coupling simulation model is established based on the existing structure of tri-post insulator on UHV GIL in accordance with the difference between environmental-friendly gas and traditional SF6 gas in terms of insulation strength and heat dissipation capacity. The temperature distribution of tri-post insulators on GIL under rated current is obtained by magnetic-thermal-fluid coupling simulation. After the influence of temperature on the dielectric constant of epoxy resin is taken into account, the electric field distribution of tri-post insulator is calculated, and the electric field intensity of each key part is checked by referring to the reference value under SF6. The stress distribution of the tri-post insulator is obtained by simulating the stress of the tri-post insulator under transportation. The calculated results show that the overall temperature and stress distribution of the tri-post insulator meet the requirements and have an enough margin, while the surface of the tri-post insulator, especially the abdomen of the insulator, is the weak link of the insulation considering the temperature, and the maximum electric field strength reaches 12.44 kV/mm, which should be paid more attention to when it is applied on environmental-friendly GIL. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：987 / 995
页数：8
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