摘  要：当柴油发电机组带非线性负载时，大量的谐波电流会流过同步电机的定子电枢绕组，这干扰了电机的正常运行。分析了谐波电流对同步发电机内部磁场的影响，描述了谐波电流形成的旋转磁场与基波磁场叠加后的形态，并对谐波电动势、谐波功率角和输出谐波电压进行了分析和推导，指出了他们之间的关系。进行了柴油发电机组带非线性负载的实验，证明了输出谐波电压和谐波电流的比值与谐波次数线性相关，并用最小二乘法确定了比例系数。
关键词：谐波电流；同步发电机；谐波电压；谐波功率角

Abstract:  When Diesel generator supplys power to non-liner load, harmonic current will flow through the generator′s armature. This part of current will distort the armature reaction. This article depicted the rotating track of the magnetic when harmonic current superposed to the fundamental. Gave a method to calculate harmonic electromotive force, harmonic power angle, output harmonic voltage, then figured out the relationship of them. Did an experiment to prove the linear relationship between the harmonic voltage and current ratio and the harmonic order, then identified the scale factor with least square method.
Key words:  harmonic current; synchronous generator; harmonic voltage; harmonic power angle