冷却器运行对电力变压器绕组热点温度影响的仿真研究
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摘要
为了研究冷却器风机开停的数量及开停方式对绕组热点温度的影响,根据一台25 000 kVA变压器的实际情况,建立了强油风冷变压器的物理模型,并用有限元分析软件Ansys模拟了不同负荷下风机的开停控制对绕组热点温度的影响。仿真实验结果表明,对于不同的变压器运行条件和不同的冷却器运行策略,利用有限元分析方法,可以模拟风机运行对变压器绕组热点的影响,为有限元分析方法指导风机运行策略提供了方法。
In order to study the effect cooler fans' running mode on winding hot spots temperature,based on the ac-tual situation of a 25 000 kVA transformer,a physical model of forced oil cooled transformer,finite element analysis software Ansys is used to simulate the control effect on winding hot spot temperature of different load fans. The simula-tion results show that,for different operating conditions and different transformer cooler operation strategy,using finite element analysis simulation method,effects of fans' running mode on transformer winding hot spot can be observed,which provides a method using finite element analysis method to guide the operational strategy of wind machine.
In order to study the effect cooler fans' running mode on winding hot spots temperature,based on the ac-tual situation of a 25 000 kVA transformer,a physical model of forced oil cooled transformer,finite element analysis software Ansys is used to simulate the control effect on winding hot spot temperature of different load fans. The simula-tion results show that,for different operating conditions and different transformer cooler operation strategy,using finite element analysis simulation method,effects of fans' running mode on transformer winding hot spot can be observed,which provides a method using finite element analysis method to guide the operational strategy of wind machine.
引文
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[4]Guide for determination of maximum winding temperature rise in liquid-filled transformers:IEEE Std 1538-2000[S].2000.
[5]刘文泽,蔡泽祥,黄松波,等.高压电力电容器内部最热点温度的计算模型[J].电力自动化设备,2009,29(7):82-84.LIU Wenze,CAI Zexiang,HUANG Songbo,et al.Calculation model of HV power capacitor internal hottest-spot temperature[J].Electric Power Automation Equipment,2009,29(7):82-84.
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[15]陈伟根,苏小平,陈曦,等.变压器顶层油温预测热模型影响因素分析与改进[J].高电压技术,2010,37(6):10331-10337.CHEN Weigen,SU Xiaoping,CHEN Xi,et al.Influence factor analysis and improvement of thermal model for predicting transformer top oil temperature[J].High Voltage Engineering,2010,37(6):10331-10337.
[16]傅晨钊,汲胜昌.电缆变压器绕组温升的数学估计[J]高电压技术,2002,28(7):10-12.FU Chenzhao,JI Shengchang.The estimation of temperature rise of winding of cable transformer[J].High Voltage Engineering,2002,28(7):10-12.
[17]SKILLEN A,REVEL A,IACOVIDES H,et al.Numerical prediction of local hot-spot phenomena in transformer windings[J].Applied Thermal Engineering,2012,36(1):96-105.
[18]EL WAKIL N,CHERECHES N C,PADET J.Numerical study of heat transfer and fluid flow in a power transformer[J].International Journal of Thermal Sciences,2006,45(6):615-626.
[19]HAJIDAALLOO E,MOHAMADIANFARD M.Effect of sun radiation on the thermal behavior of distribution transformer[J].Applied Thermal Engineering,2010,30(10):1133-1139.
[20]李季,罗隆福,许家柱.电力机车主变压器油箱三维温度场有限元分析[J].高电压技术,2005,31(8):21-23.LI Ji,LUO Longfu,XU Jiazhu.Finite element analysis of the 3D thermal field of main transformer oil tank of electric locomotive[J].High Voltage Engineering,2005,31(8):21-23.
[21]GASTELURRUTIA J,RAMOS J C,LARRAONA G S,et al.Numerical modelling of natural convection of oil inside distribution transformers[J].Applied Thermal Engineering,2011,31(4):493-505.
[22]FERZIGER J H.Computational methods for fluid dynamics[M].New York:Springer,2002.
[23]LIENHARD J H.A heat transfer textbook[M].Cambridge:Phlogiston Press,2005.
[24]RAHIMPOUR E,BARATI M,SCHAFER M.An investigation of parameters ding the temperature rise in windings with zigzag cooling flow path[J].Applied Thermal Engineering,2007,27(11/12):1923-1930.
[2]WANG M,VANDERMAAR A J,SRIVASTAVA K D.Review of condition assessment of power transformers in service[J].IEEE Electrical Insulation Magazine,2002,18(6):12-25.
[3]Guide for loading mineral-oil-immersed transformers:IEEEStd C 57.91-1995[S].1996.
[4]Guide for determination of maximum winding temperature rise in liquid-filled transformers:IEEE Std 1538-2000[S].2000.
[5]刘文泽,蔡泽祥,黄松波,等.高压电力电容器内部最热点温度的计算模型[J].电力自动化设备,2009,29(7):82-84.LIU Wenze,CAI Zexiang,HUANG Songbo,et al.Calculation model of HV power capacitor internal hottest-spot temperature[J].Electric Power Automation Equipment,2009,29(7):82-84.
[6]GALDI V,PIERRO V,PINTO I.Evaluation of stochasticresonance-based detectors of weak harmonic signals in additive white Gaussian noise[J].Physical Review E,1998,57(6):6470-6479.
[7]GALDI V,IPPOLITO L,PICCOLO A,et al.Neural diagnostic system for transformer thermal overload protection[J].IEE Proceedings Electric Power Applications,2000,147(5):415-421.
[8]GALDI V,IPPOFITO L,PICCOLO A,et al.Application of local memory-based techniques for power transformer thermal overload protection[J].IEE Proceedings Electric Power Applications,2001,148(2):163-170.
[9]SWIFT G,MOLINSKI T S,LEHN W.A fundamental approach to transformer thermal modeling I:Theory and equivalent circuit[J].IEEE Transactions on Power Delivery,2001,16(2):171-175.
[10]SWIFT G,MOLINSKI T S,BRAY R,et al.A fundamental approach to transformer thermal modeling.II.Field verification[J].IEEE Transactions on Power Delivery,2001,16(2):176-180.
[11]SWIFT G W,ZOCHOLL E S,BAJPAI M,et al.Adaptive transformer thermal overload protection[J].IEEE Transactions on Power Delivery,2001,16(4):516-521.
[12]LESIEUTRE B,HAGMAN W,KIRTLEY J.An improved transformer top oil temperature model use in an on-line monitoring and diagnostic system[J].IEEE Transactions on Power Delivery,1997,12(1):249-256.
[13]TYLAVSKY D J,QING H,JENNIE S,et al.Transformer topoil temperature modeling and simulation[J].IEEE Transactions on Industry Applications,2000,36(5):1219-1225.
[14]潘种.电力变压器绝缘故障诊断方法和动态热模型研究[D].重庆:重庆大学,2009.PAN Chong.Study on insulation fault diagnosis and thermal state parameters prediction model of power transformers[D].Chongqing:Chongqing University,2009.
[15]陈伟根,苏小平,陈曦,等.变压器顶层油温预测热模型影响因素分析与改进[J].高电压技术,2010,37(6):10331-10337.CHEN Weigen,SU Xiaoping,CHEN Xi,et al.Influence factor analysis and improvement of thermal model for predicting transformer top oil temperature[J].High Voltage Engineering,2010,37(6):10331-10337.
[16]傅晨钊,汲胜昌.电缆变压器绕组温升的数学估计[J]高电压技术,2002,28(7):10-12.FU Chenzhao,JI Shengchang.The estimation of temperature rise of winding of cable transformer[J].High Voltage Engineering,2002,28(7):10-12.
[17]SKILLEN A,REVEL A,IACOVIDES H,et al.Numerical prediction of local hot-spot phenomena in transformer windings[J].Applied Thermal Engineering,2012,36(1):96-105.
[18]EL WAKIL N,CHERECHES N C,PADET J.Numerical study of heat transfer and fluid flow in a power transformer[J].International Journal of Thermal Sciences,2006,45(6):615-626.
[19]HAJIDAALLOO E,MOHAMADIANFARD M.Effect of sun radiation on the thermal behavior of distribution transformer[J].Applied Thermal Engineering,2010,30(10):1133-1139.
[20]李季,罗隆福,许家柱.电力机车主变压器油箱三维温度场有限元分析[J].高电压技术,2005,31(8):21-23.LI Ji,LUO Longfu,XU Jiazhu.Finite element analysis of the 3D thermal field of main transformer oil tank of electric locomotive[J].High Voltage Engineering,2005,31(8):21-23.
[21]GASTELURRUTIA J,RAMOS J C,LARRAONA G S,et al.Numerical modelling of natural convection of oil inside distribution transformers[J].Applied Thermal Engineering,2011,31(4):493-505.
[22]FERZIGER J H.Computational methods for fluid dynamics[M].New York:Springer,2002.
[23]LIENHARD J H.A heat transfer textbook[M].Cambridge:Phlogiston Press,2005.
[24]RAHIMPOUR E,BARATI M,SCHAFER M.An investigation of parameters ding the temperature rise in windings with zigzag cooling flow path[J].Applied Thermal Engineering,2007,27(11/12):1923-1930.