交直流混合供电同步发电机稳态性能的仿真

为了考虑磁路饱和和整流绕组因整流元件的开关引起的电流变化对交流绕组电压波形畸变率和直流电压的影响 ,将电机的多回路理论与有限元方法结合建立了交直流混合供电同步发电机的数学模型 ,利用关联变换建立绕组、整流桥与负载间的联接。对发电机不同负载时的稳态性能进行了仿真 ,该法考虑了由于凸极效应、磁路饱和、绕组布置以及定转子齿槽的影响产生的空间谐波磁场的作用。计算结果与实验结果进行了比较证明了数学模型的正确性

Steady-state characteristics of synchronous generators with AC and DC stator connections

In order to consider the effects of saturation of the magnetic circuit and commutation of the rectifier on the voltage harmonic distortion of the AC voltage and the variation range of the DC voltage, a mathematical model on the basis of multi loop method and finite element method (FEM) is presented for a synchronous generator with AC and DC stator connections. A connection transformation matrix is used to represent the topology relation between the generator and loads. It is aimed at accurately calculating the steady state characteristics and the waveforms of AC windings. With this method, the full synergic effects of space harmonics resulting from the magnetic circuit geometry, saliency, saturation, winding layouts, slotting are included. The calculated results are compared with those of experiments.