轴向双分裂发电机变压器漏磁场及穿越短路阻抗计算与分析

发布时间：2018-09-05 08:42

【摘要】：由于轴向双分裂发电机变压器绕组结构复杂,其短路阻抗较难准确地计算。为此,以1台轴向双分裂发电机变压器为例,建立了漏磁场和等效电路模型,对其进行了3维和2维漏磁场分析。并采用漏磁链法和场路耦合方法进一步计算了不同工况下的穿越短路阻抗以及分裂支路电流分配问题,将计算结果与实验值进行对比分析。结果表明:对于短路阻抗的计算,采用场路耦合的3维有限元法比2维有限元法及漏磁链法更接近实验值,3维有限元法计算误差2%,而漏磁链法最大误差达到了7.2%;与漏磁链法相比,3维有限元法能够更精确地计算变压器的漏磁场以及分裂支路电流分配问题。对分裂变压器短路阻抗的计算研究为分裂变压器的合理设计提供了参考依据。
[Abstract]:Because of the complex winding structure of axial double split generator transformer, it is difficult to calculate the short circuit impedance accurately. For this reason, taking an axial double-split generator transformer as an example, the leakage magnetic field and equivalent circuit model are established, and the 3D and 2-D magnetic leakage field analysis is carried out. The leakage flux method and the field circuit coupling method are used to further calculate the short-circuit impedance and the current distribution of the split branch under different working conditions. The calculated results are compared with the experimental results. The results show that: for the calculation of short-circuit impedance, The three dimensional finite element method with field circuit coupling is more close to the experimental value than the two dimensional finite element method and the flux leakage chain method, and the maximum error of the flux leakage chain method is 7. 2. Compared with the flux leakage chain method, the three dimensional finite element method can be used to calculate the error. The leakage magnetic field of transformer and the current distribution problem of split branch are calculated more accurately. The study of short circuit impedance of split transformer provides reference for reasonable design of split transformer.
【作者单位】：沈阳工业大学特种电机研究所;特变电工沈阳变压器集团有限公司;
【基金】：国家自然科学基金(51177103) 辽宁省高校创新团队支持计划(LT2011002)~~
【分类号】：TM401.1

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