【摘要】 为分析变压器在端口电压约束下的电磁过程 ,本文研究了三维电磁场的场路耦合问题。根据A法和T法的各自特点 ,考虑变压器绕组的结构特点 ,引入外施电压的耦合 ,分别建立基于A法和基于T法的变压器三维场路耦合模型。将两种方法用于变压器绕组突发短路过程的计算 ,计算结果一致 ,但采用基于T法的三维场路耦合模型计算量小 ,非常适于涡流区所占比例较小的电磁设备的求解更多还原

【Abstract】 In order to analyze electromagnetic processes of transformers under constraints of port voltages,the coupled field circuit problem of 3D electromagnetic field is studied in the paper.According to respective features of vector magnetic potential formulation and vector electric potential formulation,coupling voltage items are introduced into models.Considering design features of transformer windings,transformer’s 3D field circuit coupled models based on vector magnetic potential formulation or vector electric potential formulation are established respectively.The two methods are used in calculation of a transformer during suffering sudden short circuit.Results of the two methods agree with each other.Computation time used by 3D field circuit coupled model based on vector electric potential formulation is shorter and the model is very suitable for calculation of electromagnetic devices whose eddy current areas occupy small portion.更多还原