三种绝缘气体下开关设备的温度场及流场对比与分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (843 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Based on the heat conduction equation, fluid flow governing equation and radiation heat transfer equation, a multi-physics coupled mathematical model is established, in which the convec- tion heat transfer problem between solid and fluid is solved by wall function for simulating the temperature in the switchgear. The joule heat losses of current-carrying conductors and shell are calculated respectively including skin, proximity and eddy current effects with the use of 3D edge element method. The three dimensional thermal and fluid field in a type of switchgear filled respec- tively with SF₆, N₂, and air are calculated numerically by the finite volume method and the hexahedral grid and analyzed to discuss the feasibility of using air or N₂ as the substitution of SF₆. The results show that the temperature field and fluid field in three gases are similar in the switchgear. The temperature rise of current-carrying loop is the highest in SF₆ and is approximately equal in the N₂ and air. The flow velocity in SF₆ is the highest and is the lowest in the air. So the conclusion could be made that under the qualified withstand voltage air or N₂could replace SF₆as the insulating gas of switchgear from the perspective of temperature rise.

Key words： Temperature rise fluid field switchgear SF6 N2 air

Received: 10 November 2013 Published: 10 April 2015

PACS:

TM591

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Zhang Junmin
	Gao Huikai
	Feng Hao

Cite this article:

Zhang Junmin,Gao Huikai,Feng Hao. Analysis of Thermal and Fluid Field of Switchgear in Three Insulating Gases[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 155-161.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I6/155

[1] 徐建源, 任春为, 司秉娥, 等. 40.5kV SF 6 充气式开关柜三维电场分析[J]. 中国电机工程学报, 2008, 28(15): 136-140. Xu Jianyuan, Ren Chunwei, Si Binge, et al. Three dimensional electric field analysis of 40.5kV SF 6 cubicle gas-insulated metal-enclosed switchgear[J]. Proceedings of the CSEE, 2008, 28(15): 136-140.
[2] 李慧芬. SF 6 气体替代面临的诸多挑战[J]. 高电压技术, 2000, 26(3): 50-51. Li huifen. Many challenges to substitution for SF 6 [J]. High Voltage Engineering, 2000, 26(3): 50-51.
[3] 孙鹏程, 王帮田, 洪文芳, 等. SF 6 /N 2 混合气体绝缘特性的实验研究[J]. 中国电力, 2012, 45(12): 71-75. Sun Pengcheng, Wang Bangtian, Hong Wenfang, et al. Experimental studies on electrical insulation perfor- mances of SF 6 /N 2 gas mixtures[J]. Electric Power, 2012, 45(12): 71-75.
[4] 张强华, 谭燕, 邬建刚. 40.5kV无SF 6 C-GIS开关柜研究[J]. 高压电器, 2011, 47(6): 29-38. Zhang Qianghua, Tan Yan, Wu Jiangang. Research of 40.5kV non SF 6 C-GIS[J]. High Voltage Apparatus, 2011, 47(6): 29-38.
[5] 贾申利, 赵虎, 李兴文, 等. SF 6 替代气体灭弧性能的研究进展综述[J]. 高压电器, 2011, 47(11): 87-97. Jia Shenli, Zhao Hu, LI Xingwen, et al. Survey of recent researches on the arc quenching characteristics of SF 6 substitute gases[J]. High Voltage Apparatus, 2011, 47(11): 87-97.
[6] Uchii T. Gas in sulated switch gear: US, 0221626[P]. 2007-09-27.
[7] Joong Kyoung Kim. A novel coupled magneto-thermal- flow analysis for temperature rise prediction of power apparatus[J]. Electrical Machines and Systems, 2008(43): 585-588.
[8] 雷银照. 电磁场[M]. 北京: 高等教育出版社, 2008.
[9] 张俊民, 侯振华, 张春朋, 等. 27.5kV GIS母线室三维温度场的数值计算[J]. 电工技术学报, 2011, 26(12): 62-67. Zhang Junmin, Hou Zhenhua, Zhang Chunpeng, et al. Three dimensional thermal field numerical calculation of 27.5kV gas-insulated switchgear bus bar’s cabinet [J]. Transactions of China Electrotechnical Society, 2011, 26(12): 62-67.
[10] 陶文铨. 数值传热学[M]. 西安: 西安交通大学出版社, 2001.
[11] Kim S W. Coupled finite-element-analytic technique for prediction of temperature rise in power apparatus [J]. IEEE Transactions on Magnetic, 2002, 38: 921- 924.
[12] Chico X Albets. Analysis of wall-function approaches using two equation turbulence models[J]. International Journal of Heat and Mass Transfer, 2008, 51: 4940- 4957.
[13] Barakos G. Natural convection flow in a square cavity revisited: laminar and turbulent models with wall functions[J]. International Journal for Nmerical Methods in Fluids, 1994, 18: 695-719.
[14] Ho S L, Li Y. A 3-D study of eddy current field and temperature rises in a compact bus duct system[J]. IEEE Transactions on Magnetics, 2006, 42(4): 987- 990.
[15] 王胜辉. 高电压绝缘技术[M]. 北京: 华北电力大学出版社, 2002.
[16] 刘光启. 化学化工物性数据手册[M]. 北京: 化学工业出版社, 2002.
[17] 方昆凡. 工程材料手册[M]. 北京: 北京出版社, 2002.