王流火 1陶雄武 2周俊宏 2王海燕 2谢榕昌 1熊志武1
作者信息
- 1. 广东电网有限责任公司,广州 510410
- 2. 广东电网有限责任公司惠州供电局,惠州 516001
- 折叠
摘要
Abstract
To study the temperature rise characteristics of 550 kV/8000 A large-capacity SF6 inflatable bushing,a mul-ti-physics field coupling model of 550 kV/8000 A large-capacity SF6 inflatable bushing was established in this paper.The eddy current effect,skin effect,gravity effect,thermal convection,thermal radiation,and other factors are comprehen-sively taken into consideration,and 1.1 times the current(8000 A)was calculated and analyzed by using ANSYS software,that is,the distribution law of the temperature field and airflow field of the bushing under the condition of 8800 A current,and the temperature rise test of 550 kV/8000 A SF6 inflatable bushing was carried out to verify the correctness of the sim-ulation results.Finally,the effects of four influencing factors,such as external wind speed,gas pressure,load current,and outer diameter of the center conductor,on the temperature rise characteristics of the bushing were simulated and analyzed.The research results show that the maximum temperature is located below the small hole in the upper part of the central conductor in the bushing,the maximum temperature is 363 K,and the temperature above the bushing is higher than below from an overall perspective.The simulation results are in good agreement with the experimental results,and the error is within 8%.The temperature rise of the bushing decreases significantly with the increase of the external wind speed,but the degree of declining gradually decreases.The temperature rise of the bushing decreases with the increase of the gas pressure.As the current increases,more Joule heat is generated,and the load current directly affects the conductor tem-perature rise.The temperature rise of the bushing increases as the outer diameter of the center conductor decreases.The research content of this paper can provide theoretical reference for the design of large-capacity high-pressure SF6 inflata-ble bushing in the future.关键词
SF6充气套管/温升特性/多物理场耦合/温度场/气流场/温升试验/影响因素Key words
SF6 inflatable bushing/temperature rise characteristics/multi-physics field coupling/temperature field/air-flow field/temperature rise test/influencing factors
