多次短路下电力变压器绕组变形累积效应分析
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摘要
根据洛伦兹电磁力原理计算和分析了变压器绕组中短路电磁力的分布特性。建立了变压器绕组塑性变形的累积模型,通过有限元法对模型进行了数值求解,进而分析了绕组变形的累积规律及影响因素。
The distribution characteristics of short-circuit electromagnetic force in transformer winding are calculated and analyzed based on the principle of Lorenz. The cumulative model of transformer winding deformation is established. The model is solved numerically by FEM. The cumulative rule and influencing factors of winding deformation are analyzed.
The distribution characteristics of short-circuit electromagnetic force in transformer winding are calculated and analyzed based on the principle of Lorenz. The cumulative model of transformer winding deformation is established. The model is solved numerically by FEM. The cumulative rule and influencing factors of winding deformation are analyzed.
引文
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[6]Bai C,Gao W,Liu T.A preliminary study of transformer life estimation based on linear cumulative damage theory[J].International Transactions on Electrical Energy Systems,2015,24(9):1217-1231.
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[9]冯忠信,张建中,杨建军,金属材料在循环加载下塑性变形的传播特性[J].金属学报,1995,31(8):352-355.
[10]张宏博,黄茂松,宋修广,循环荷载作用下粉细砂累积变形的等效黏塑性本构模型[J].水利学报,2009,40(6):651-658.
[11]Corcoran R J,Palmer S.Mechanical properties of copper in relation to power-transformer design[J].Power Engineering Journal,2009,1(3):154-157.
[12]李洪奎,李岩.不同预紧力下变压器绕组轴向振动模态分析[J].电机与控制学报,2010,14(8):98-106.
[13]张春红,周腊吾,李中祥,等.一起500k V事故变压器短路强度计算与分析[J].变压器,2016,53(3):1-5.
[14]李祎春,刘文里,李军,等.大型电力变压器低压绕组辐向稳定性的仿真研究[J].变压器,2016,53(4):25-29.
[2]王世山,汲胜昌,李彦明.电缆绕组变压器短路时线圈轴向稳定性的研究[J].中国电机工程学报,2004,24(2):166-169.
[3]Norris E T.The author's reply to the discussion on"Mechanical strength of power transformers in service"[J].Power Engineering,1957,104(16):305-306.
[4]Kojima H,Miyata H,Shida S,et al.Buckling strength analysis of large power transformer windings subjected to electromagnetic force under short circuit[J].IEEE Transactions on Power Apparatus&Systems,2007,PAS-99(3):1288-1297.
[5]Zhang H,Yang B,Xu W,et al.Dynamic deformation analysis of power transformer windings in short-circuit fault by FEM[J].IEEE Transactions on Applied Superconductivity,2014,24(3):1-4.
[6]Bai C,Gao W,Liu T.A preliminary study of transformer life estimation based on linear cumulative damage theory[J].International Transactions on Electrical Energy Systems,2015,24(9):1217-1231.
[7]朱德恒,严璋,谈克雄,等,电气设备状态监测与故障诊断技术[M].北京:中国电力出版社,2009.
[8]姜山.电力变压器绕组变形的受力分析[D].北京:华北电力大学,2012.
[9]冯忠信,张建中,杨建军,金属材料在循环加载下塑性变形的传播特性[J].金属学报,1995,31(8):352-355.
[10]张宏博,黄茂松,宋修广,循环荷载作用下粉细砂累积变形的等效黏塑性本构模型[J].水利学报,2009,40(6):651-658.
[11]Corcoran R J,Palmer S.Mechanical properties of copper in relation to power-transformer design[J].Power Engineering Journal,2009,1(3):154-157.
[12]李洪奎,李岩.不同预紧力下变压器绕组轴向振动模态分析[J].电机与控制学报,2010,14(8):98-106.
[13]张春红,周腊吾,李中祥,等.一起500k V事故变压器短路强度计算与分析[J].变压器,2016,53(3):1-5.
[14]李祎春,刘文里,李军,等.大型电力变压器低压绕组辐向稳定性的仿真研究[J].变压器,2016,53(4):25-29.