三相变压器不对称运行的分析

探讨了三相变压器在三相电源不对称及三相负载不对称情况下的运行。以Ｙ，ｙｎ０连接的三相变压器为例，讨论了有零序分量时三相变压器的不对称运行，以各序准确等效电路为基础，利用对称分量法及叠加原理对此做了详细的分析，并推导出计算三相变压器原、副边相电压及相电流的矩阵表达式，并进行了计算机程序设计。最后，以一台变压器的实验和计算结果相对照，证明了该分析方法是正确的。

Analysis on Asymmetric Operation of Three-phase Transformer

Asymmetric operation with source and load in three-phase transformer is studied. The three-phase transformer with Y, yn0 connection is discussed when the zero-sequence current is existed. In terms of every sequence exact equivalent circuit, the asymmetric operation is analyzed in more detail using symmetric component method and superposition principles. The matrix equations for calculating primary and secondary phase voltage and phase current are deduced. The method is proved to be adequate by comparison of measured and calculated results in a case study.