变速变桨风力发电机组的优化控制

Optimal control of variable speed variable pitch wind turbine

提出了大型变速变桨风力发电机组在不同控制阶段的优化控制策略。在低风速时,采用自适应转矩控制方式,实现机组的变速运行,追踪最佳风能利用系数。在额定风速以上时,为了解决传统桨距控制方式系统超调量大的问题,提出了一种新型气动转矩观测器,并将气动转矩与发电机转矩偏差输入控制器。通过Bladed外部控制器模块编程并进行仿真,结果表明,所提出的控制策略能够更好地追踪最大功率点,并改善桨距控制效果,稳定功率输出。

Optimal control strategy of large scale variable speed pitch wind turbine through different control stage was proposed. The self-adapting torque control strategy was adopted to achieve the variable speed control and track the optimal power coefficient when the wind speed was low. In order to solve the problem of big overshoot of the traditional control mode, a novel kind of aerodynamic torque observer was proposed. By putting the aerodynamic torque and generator torque error data into controller. Bladed external controller module was used to programming and simulating.The results shown that the proposed control strategy could tracking maximum power point better, improve the control effect of pitch and stable the power output.