变速恒频双馈感应发电机的空载特性

The no-load characteristic of VSCF double-fed induction generator

针对在实际情况中风速的随机性变化会导致风力发电机输出的电压、频率波动,建立了基于Matlab下双馈感应发电机空载模型和定子磁链定向的矢量控制模型;依据电磁场基本理论,将电机电磁场的有限元计算与外部电路相结合,建立了双馈感应发电机的场路耦合数学模型,并计算出空载运行时不同转速下发电机的特性曲线。通过一台3.5 kW的6极电机进行了仿真和空载实验。仿真结果与实验结果对比表明,系统具有良好的动态性能,能够很好满足变速恒压恒频运行;电机性能的分析为进一步改进风力发电机的电磁性能和发电质量提供参考。

For the wind generator output voltage and frequency fluctuates with wind speed random variation, no - load model and stator flux linkage vector control system model of a double fed induction generator are established. According to the basic theories of electromagnetic, combining the FEM with out circuit, a mathematical model of the double fed induction generator is established. Based on this mathematical model, generator no-load characteristic curve with different speed was calculated. By using a 3.5 kW 6 pole wound induction generator as example, the simulation and the no-load experiments are done. Sireulation and experiment results show that the system have more favorable fled varied speed, constant voltage and constant frequency. The analysis for generator provides some theoretical reference for implementing the electromagnetic performance of generator and the electricity quality.