中文摘要：

根据双PWM变换器的优点并结合交流励磁发电技术和矢量控制技术，建立了双PWM变换器励磁的双馈感应风力发电机矢量控制系统模型。为减少交直交变换器中电容容量且能稳定直流母线电压，建立了在主从控制方式下应用功率平衡联合控制策略的双PWM控制模型。该模型可对转子侧和网侧两个PWM变换器进行协调控制，使得整流部分充分利用了逆变部分的信息。仿真结果表明该方法极大提高了直流母线电压的动态控制性，并因此大大减少了对变换器中电解电容容量的要求，也使得风力发电机组的响应速度加快，最终使整个风力发电系统的可靠性和寿命大大提高。

英文摘要：

Taking the advantage of back to back PWM converters, combining with AC excited electricity generating technology and the vector control strategy, the model of vector control scheme of doubly fed induction wind generator excited by the back to back PWM converters has been built. In order to decrease the electrolytic capacitor capacity and limit the dc-bus voltage fluctuation,the back to back PWM converters model was built using power-balancing control strategy based master-slave,which fully utilize the inverter dynamic information in the converter dynamic control. The simulation result indicate that the proposed method can control the dc-bus voltage fluctuation of the converter, so that can decrease the ,electrolytic capacitor capacity greatly and quicken the response ：speed, which will enhance the reliability and the life-span of the wind generator system very effectively.