中文摘要：

在风力发电领域,无刷双馈电机（BDFM）因其具有代替传统双馈感应电机（ DFIM）的潜力而受到广泛关注.目前,对 BDFM 的模型改进和控制方法的研究是国内外专家学者的研究热点.针对BDFM缺少一个有利于进行控制分析的转矩方程这一问题,通过 对统一矢量模型的研究,给出了两种简便的BDFM转矩方程表达式,即两定子绕组电流矢量的乘积、两定子绕组磁链矢量的乘积.应 用转矩方程进行转速控制系统分析,提出了转速的电流滞环控制,并搭建了双PWM变频调速平台进行试验研究.通过将理论计算转 矩值与实测电磁转矩值进行对比,证明了转矩方程推导结果的准确性,验证了电流滞环控制的良好控制效果及解耦性.基于统一矢 量模型的BDFM转矩方程,将给控制策略的研究带来很大便利,同时有利于电机机电特性的分析.

英文摘要：

In wind power generation field, the brushless doubly fed machine （ BDFM ） has received wide attention because of the possibility to substitute the traditional doubly fed induction machine （ DFIM） . At present, the research on model improvement and control method of BDFM has become the hotspot for domestic and foreign experts. Aiming at the problem that BDFM lacks of a torque equation that is useful for control analysis, through researching the generalized vector model, two types of simplified expressions of BDFM are given, which are the product of the two stator current vectors, and the product of the tow stator flux vectors. The speed control system is analyzed using torque equation, and the current hysteresis control is proposed, and the dual PWM variable frequency speed control platform is built for conducting experimental research. Through comparing the theoretical calculated torque and the torque measured, the correctness of theoretical deduction for torque is proved, and the good control performance and decoupling performance of the current hysteresis control strategy has also been verified. The torque equation BDFM based on generalized vector model facilitates the research on the control strategy and is useful for analysis of the electromechanical characteristic of the machines.