《机电工程》杂志,月刊( 详细... )

中国标准连续出版物号 ISSN 1001-4551 CN 33-1088/TH
主办单位浙江省机电集团有限公司
浙江大学
主编赵 群
副 主 编唐任仲、罗向阳(执行主编)
总 经 理罗向阳
出 版浙江《机电工程》杂志社有限公司
地 址杭州市上城区延安路95号浙江省机电集团大楼二楼211、212室
电话Tel+86-571-87041360、87239525
E-mailmeem_contribute@163.com
国外发行中国国际图书贸易总公司
订阅全国各地邮局   国外代号M3135
国内发行浙江省报刊发行局
邮发代号32-68
广告发布登记证:杭上市管广发G-001号

在线杂志

当前位置: 机电工程 >>在线杂志

油浸式大型变压器热点温度的动态模型

作者:海瑛 钱苏翔 严拱标 日期:2007-03-05/span> 浏览:3529 查看PDF文档

                  油浸式大型变压器热点温度的动态模型
海瑛1      钱苏翔 2   严拱标3
(1 ,2浙江嘉兴学院机电工程分院,314001;3 浙江大学机电工程学院310027)
摘要:文章考虑了油浸变压器油粘度、损耗随温度的变化的情况后,基于热传导理论和不同情况下非线性热阻的定义,推导出了可估算不同类型变压器绕组热点温度的动态模型,通过ONAN制冷变压器的实测数据和专用模型的验证表明,该模型是正确、有效的。

关键词:热点温度,顶点油,底部油,非线性热阻。

Dynamic Modelling of Hot-Spot Temperature inOil-Immersed Power Transformers
HAI Ying 1 ,    Qian Su Xiang2 , Yan Gong Biao3
(1,2-School of Mechanical Engineering , Jiaxing University jiaxing 314001,
     3- School of Mechanical Engineering,Zhe jiang University, hangzhou 314000)
Abstract :This paper presents hot-spot thermal models taking into account that oil viscosity changes and loss variation with temperature.The models are based on heat transfer theory and a new definition of nonlinear thermal resistances at different locations within a power transformer. The new thermal models will be validated using experimental and expert model on a ONAN-cooled unit. The results verified the accuracy of thermal models.

Key words: Hot-spot temperature, power transformer, top-oil temperature , bottom-oil temperature, nonlinear oil thermal resistance

参考文献:
[1]IEEE Std。C57。91-1995。Guide for loading mineral-oil-immersed transforms [S].
[2] H. Nordman, N. Räfsbäck, and D. Susa, Temperature responses to step changes in the load current of power transformers[J]. IEEE Trans. Power Del., Oct. 2003. 18( 4): 1110–1117.
[3] He Q。SiJ。Tylavsky D J。Predictionoftop-oil temperature for transformers using neural network [J].IEEE Trans. Power Del. Jan. 2001.15(4): 1205–1211.
[4] H. Nordman and M. Lahtinen,.Thermal overload tests on a 400 MVA power transformer with a special 2.5 pu short time loading capability. IEEE Trans. Power Del. Jan. 2003.18(1): 107–112.
[5]杨世铭.传热学[M].高等教育出版社(第二版). 1992.6
[6] L. W. Pierce.An investigation of the thermal performance of an oil filled transformer winding. IEEE Trans. Power Del.. Jul. 1992. 7(3) :1347–1358.
[7] K. Karsai, D. Kerenyi, and L. Kiss.Large Power Transformers. New York: Elsevier. 1987.
[8] Nordman H. and Lahtinen M. Thermal overload tests on a 400-MVA power transformer with a special 2.5-p.u. Short time loading capability. IEEE Transactions on Power Delivery. Jan 2003. 18 (1) :107 – 112.
[9] J. Aubin.and Y. Langhame. Effect of oil viscosity on transformer loading capability at low ambient temperatures. IEEE Transactions on Power Delivery. April 1992.7(2):516-524.
[10]刘卫国.陈昭平.张颖.MATLAB程序设计与应用[M].高等教育出版社.2006.6

[11] Radakovic Z.,Feser K. A new method for the calculation of the hot-spot temperature in power transformers with ONAN cooling. IEEE Transactions on Power Delivery, October 2003.18( 4):1284-1292



友情链接

浙江机械信息网