考虑转子谐波电流影响后 双馈电机电磁功率的分析与计算(英文)

ANALYSIS AND CALCULATION OF ELECTROMAGNETIC POWERS OF DOUBLY-FED SYNCHRONOUS MACHINES INCORPORATING HARMONIC COMPONENTS IN ROTOR CURRENT

有不少文章研究了双馈电机的稳态运行性能,但在研究其性能时考虑谐波电流影响的却较少。该文从该类电机的基本电磁关系出发,提出了基波和谐波的等效电路,给出了谐波电路中参数的计算方法。导出了基波电磁功率、稳定谐波电磁功率及脉动谐波电磁功率的计算公式。文章最后以一个实际的绕线型感应电机用交直交电压型逆变器供给励磁的双馈电机为例,计算了主要谐波的稳定和脉动的电磁功率以及电机总的电磁功率。结果表明,该文给出的分析与计算方法是有效的。

Although some papers that presented the analysis of the steady state performances for a Doubly-Fed Synchronous Machine (DFSM) have already been reported, few papers of them analyzed the performances considering harmonic currents in excitation source. In this paper, firstly, based on the analysis of the basic electromagnetic relation for the DFSM, the fundamental and harmonic equivalent circuits are presented and parameters calculating methods in the harmonic equivalent circuit are given. Then, the calculation formulas of the fundamental and steady harmonic as well as pulse harmonic electromagnetic powers are derived. Finally, as an example the steady and pulse harmonic electromagnetic powers as well as total electromagnetic power for the doubly fed machine consisting of an induction machine with wound rotor and a AC-DC-AC voltage type inverter are analysed.