双馈感应风力发电系统的无源性控制方法研究

Study on Passivity-Based Control Strategies of Doubly Fed Induction Wind Power Generator Systems

从能量平衡关系出发,利用非线性控制理论,提出了新型的双馈感应风力发电机自适应控制方法.该方法从能量角度分析了双馈感应风力发电系统,不必抵消"无功力",就可实现负载转矩时变未知情形下磁链、转速的渐近跟踪控制,具有形式简单、无奇异点、鲁棒性好的特点.基于dSPACE的实验结果证明了该控制策略的有效性.

Starting from the energy equivalence relation, and by appliation of non-linear control theory a new doubly fed induction generation control method is proposed. The doubly fed induction generator（DFIG） tracks reference flux and speed trajectories with time-varying load torque. To achieve this, an adaptive PBC method based on Euler-Lagrange（EL） system is developed. The key point with this method is the identification of terms, known as workless forces, which appear in the dynamic equations of DFIG but do not have any effect on the energy balance equation of the closed loop. This leads to a simple control structure and enhances the robustness of the control system. The reasonability and validity is testified by the experimental results based on dSPACE.