基于有限元法探究电力变压器绕组变形频率响应的仿真研究
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摘要
利用有限元软件ANSYS Maxwell计算健康绕组的等值电路参数,通过与解析公式法计算结果对比验证有限元计算结果的正确性。然后基于有限元软件建立了不同变形类型和变形程度的绕组模型,仿真得到了绕组轴心偏移、辐向变形和饼间间距变化绕组的等值电路参数的变化。基于等值电路参数利用电路仿真软件PSPICE仿真绕组变形下的频率响应特性曲线,得到3种变形类型对谐振点的频率、幅值的影响。
The finite element software ANSYS Maxwell is applied to calculate the equivalent circuit parameters of healthy winding and their correctness is verified by comparing them with those calculated by the analytical formulas. The winding models for different deformation types and degrees are then established based on ANSYS Maxwell. The changes of equivalent circuit parameters are obtained by the simulations for three winding deformation types,i.e. central displacement,radial deformation and inter-disk distance variation.Based on these equivalent circuit parameters,the circuit simulation software PSPICE is applied to simulate the frequency-response characteristic curves of deformed windings and the effects of three deformation types on the frequency and amplitude of resonance point are obtained.
The finite element software ANSYS Maxwell is applied to calculate the equivalent circuit parameters of healthy winding and their correctness is verified by comparing them with those calculated by the analytical formulas. The winding models for different deformation types and degrees are then established based on ANSYS Maxwell. The changes of equivalent circuit parameters are obtained by the simulations for three winding deformation types,i.e. central displacement,radial deformation and inter-disk distance variation.Based on these equivalent circuit parameters,the circuit simulation software PSPICE is applied to simulate the frequency-response characteristic curves of deformed windings and the effects of three deformation types on the frequency and amplitude of resonance point are obtained.
引文
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[19]弓杰伟,马宏忠,姜宁,等.电力变压器的有限元建模与绕组松动分析[J].电力自动化设备,2016,36(4):78-84.GONG Jiewei,MA Hongzhong,JIANG Ning,et al.Finite element modeling and winding looseness analysis for power transformer[J].Electric Power Automation Equipment,2016,36(4):78-84.
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[2]BAGHERI M,NADERI M S,BLACKBURN T,et al.Frequenc response analysis and short-circuit impedance measurement in detection of winding deformation within power transformers[J]IEEE Electrical Insulation Magazine,2013,29(3):33-40.
[3]王明林,陈民铀,赖伟,等.一种改进的配电变压器短路电抗在线检测方法[J].电力自动化设备,2015,35(3):127-132.WANG Minglin,CHEN Minyou,LAI Wei,et al.Improved method of online measuring for distribution transformer short circui reactance[J].Electric Power Automation Equipment,2015,35(3):127-132.
[4]DICK E P,ERVEN C C.Transformer diagnostic testing by frequency response analysis[J].IEEE Transactions on Powe Apparatus and Systems,1978,97(6):2144-2153.
[5]姚陈果,赵仲勇,李成祥,等.基于暂态过电压特性的电力变压器绕组变形故障在线检测[J].高电压技术,2015,41(3):873-880.YAO Chenguo,ZHAO Zhongyong,LI Chengxiang,et al.Onlin detecting winding deformation of power transformer based on transient overvoltage[J].High Voltage Engineering,2015,41(3):873-880.
[6]BAGHERI M,NADERI M S,BLACKBURN T.Advanced trans former winding deformation diagnosis:moving from off-line to on line[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(6):1860-1870.
[7]韩爱芝,刘莘昱,曾定文,等.判断变压器绕组变形的简单方法[J].变压器,2003,40(4):8-12.HAN Aizhi,LIU Shenyu,ZENG Dingwen,et al.Simple method t judge deformation of transformer windings[J].Transformer,2003,40(4):8-12.
[8]王钰,李彦明,张成良.变压器绕组变形检测的LVI法和FRA法的比较研究[J].高电压技术,1997,23(l):13-15.WANG Yu,LI Yanming,ZHANG Chengliang.The comparisona study on LVI and FRA method of detecting winding deformation faults in transformers[J].High Voltage Engineering,1997,23(1):13-15.
[9]何平,文习山.变压器绕组变形的频率响应分析法综述[J].高电压技术,2006,32(5):37-41.HE Ping,WEN Xishan.Survey of frequency response analysis on winding deformation of transformers[J].High Voltage Engineering,2006,32(5):37-41.
[10]JENSEN J B,JENSEN B B,MIKKELSEN S D,et al.Parametric identification in potential transformer modeling[J].IEEE Transactions on Power Delivery,1992,7(1):70-76.
[11]ISLAM S M.Detection of shorted turns and winding movements in large power transformers using frequency response analysis[C]∥IEEE Engineering Society Winter Meeting.Singapore:IEEE,2000:2233-2238.
[12]VAESSEN P T,HANIQUE E.A new frequency response analysis method for power transformers[J].IEEE Transactions on Power Delivery,1992,7(1):384-391.
[13]MOREAU O,GUILLOT Y,BARRE B.FRA diagnosis method:simulation applied to feasibility study and efficiency improvement[C]∥Power Engineering Society 1999 Winter Meeting.[S.l.]:IEEE,1999:1059-1064.
[14]MCDOWELLL G W,LOCKWOOD M L.Real time monitoring of movement of transformer winding[C]∥IEE Colloquium on Condition Monitoring and Remanent Life Assessment in Power Transformers.[S.l.]:IET,1994,3:6/1-6/6.
[15]YAO Chenguo,ZHAO Zhongyong,CHEN Yu,et al.Transformer winding deformation diagnostic system using online high frequency signal injection by capacitive coupling[J].IEEETransactions on Dielectrics and Electrical Insulation,2014,21(4):1486-1492.
[16]WANG M,VANDERMAAR A J,SRIVASTAVA K D.Improved detection of power transformer winding movement by extending the FRA high frequency range[J].IEEE Transactions on Power Delivery,2005,20(3):1930-1938.
[17]LUDWIKOWSKI K,SIODLA K,ZIOMEK W.Investigation of transformer model winding deformation using sweep frequency response analysis[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(6):1957-1961.
[18]孟晨.多绕组电力变压器波过程的计算和分析[D].沈阳:沈阳工业大学,2013.MENG Chen.Wave process calculation and analysis of power transformer multi winding[D].Shenyang:Shenyang University of Technology,2013.
[19]弓杰伟,马宏忠,姜宁,等.电力变压器的有限元建模与绕组松动分析[J].电力自动化设备,2016,36(4):78-84.GONG Jiewei,MA Hongzhong,JIANG Ning,et al.Finite element modeling and winding looseness analysis for power transformer[J].Electric Power Automation Equipment,2016,36(4):78-84.
[20]中华人民共和国国家发展和改革委员会.电力变压器绕组变形的频率响应分析法:DL/T 911-2004[S].北京:中国标准出版社,2004.