双馈感应风力发电机最大风能跟踪算法研究

Research on the Maximum Wind Energy Tracking Algorithm for Doubly-fed Induction Generator

针对风电机组的最大风能追踪问题,采用滑模控制算法设计最大功率点的跟踪控制回路。并在虚拟的660 k W风力发电机上与传统的PI控制算法进行跟踪效果对比。当风速突变时,传统PI控制算法的跟踪曲线的效果欠佳,在最佳功率的参考值和实际值之间的轨迹跟踪存在延迟;延迟时间为0.11 s。而新的滑模控制策略有更好的轨迹跟踪性能。缩短了参考值和实际值之间的延迟时间;延迟时间为0.03 s。仿真结果验证了滑模控制算法实现最大功率跟踪的良好效果,具有较强的鲁棒性和适应性。

In this paper, a sliding mode control algorithm is used to design the maximum power point tracking control loop for the maximum wind energy tracking problem of the wind turbine. The tracking effect is compared with the traditional PI control algorithm in the virtual 660 kW wind generator. When the wind speed is changed, the tracking curve of the traditional PI control algorithm is poor, and there is a delay between the reference value and the actual value of the optimal power. The delay time is 0.11 s. The new sliding mode control strategy has better tracking performance. The delay time between the reference value and the actual value is shortened, and the delay time is 0.03 s. Simulation results verify the effectiveness of the sliding mode control algorithm for maximum power tracking with strong robustness and adaptability.