多绕组变压器复合短路阻抗与环流计算

Calculation of Composite Short-circuit Impedance and Circulating Current of Multi-winding Transformer

为解决多绕组变压器建模复杂、复合短路阻抗和环流计算困难以及计算时间长的问题,提出一种基于简化变压器有限元模型的计算方法。该方法可以快速准确地计算多绕组变压器的复合短路阻抗和相应的短路环流。首先建立了简化的变压器有限元模型,并获得了绕组的电感矩阵。然后,将相关数据输入计算软件中进行计算,以得到多绕组变压器的复合短路阻抗和对应的短路环流。为了验证该计算方法的准确性,进行了实例验证。结果表明,该方法计算精度高并且耗时较少。通过使用这种基于简化变压器有限元模型的计算方法,可以有效地解决多绕组变压器的复合短路阻抗和环流计算中的困难,这不仅提高了计算效率,还能提供准确的计算结果,具有较好的工程应用价值。

In order to solve the problems of complex modeling of multi-winding transformer,difficult calculation of composite short-circuit impedance and circulating current,and long calculation time,a calculation method based on simplified transformer finite element model is proposed.This method can quickly and accurately calculate the composite short-circuit impedance and the corresponding short-circuit circulating current of the multi-winding transformer.Firstly,a simplified finite element model of the transformer is established,and the inductance matrix of the winding is obtained.Then,the relevant data are input into the calculation software for calculation to obtain the composite short-circuit impedance and the corresponding short-circuit circulation of the multi-winding transformer.In order to verify the accuracy of the calculation method,an example is verified.The results show that the method has high calculation accuracy and less time-consuming.By using this calculation method based on the simplified finite element model of the transformer,the difficulties in the calculation of the composite short-circuit impedance and circulating current of the multi-winding transformer can be effectively solved,which not only improves the calculation efficiency,but also provides accurate calculation results and has good engineering application value.