直接功率控制在永磁直驱风电系统的应用

The application of direct power control in permanent magnet direct-driven wind power system

永磁直驱风力发电机组由于系统参数的变化而具有多变量、非线性及强耦合的特点,因此矢量控制会受到影响。文章针对永磁直驱风电系统稳定性和动态性能的问题,采用直接功率控制策略,通过省去电流闭环环节,减少了坐标变换,从而简化控制算法以改善系统性能。最后,通过Matlab/Simulink搭建直接功率控制仿真模型,对控制策略的可行性进行仿真验证;并采用DSP+FPGA实现所提出控制策略,进行了实验验证。仿真和实验结果均证明了控制策略的有效性。

The permanent magnet direct-driven wind turbine generator system has the characteristics of multi-variable, nonlinear and strong coupling due to the change of system parameters, and the vector control would be affected. Ac- cording to stability and dynamic performance of the permanent magnet direct-driven wind power system, the direct power control strategy is proposed. By eliminating closed-loop of current link , the coordinate transformation is reduced and the control algorithm is simplified, so the performance of the system is improved. Finally, direct power control simulation model under Matlab/Simulink is built, which verifies the feasibility of control strategy, and the DSP ＋ FPGA realization of the proposed control strategy proves the effectiveness of the control strategy.