变桨距风电系统功率控制的逆系统鲁棒方法

Inverse-system based robust approach for power control of variable-pitch wind generation system

对于具有非仿射型非线性特性的系统,逆系统方法是解决其控制问题的有效手段,但是该方法对系统参数依赖性较强。该文分析了用于变桨距风电系统功率控制的逆系统方法对系统参数扰动的鲁棒性,在此基础上,提出了逆系统鲁棒补偿方法以抑制系统参数的扰动。设计了硬件在环的VP-WGS实验平台,通过实验验证了该方法的有效性。实验结果表明:该逆系统鲁棒控制方法实现简单,可以在风速任意波动条件下有效地控制风电系统的输出功率,并且对系统参数的大范围扰动具有较强的鲁棒性。

Inverse-system based strategy is effective to the control of the system with non-affine nonlinear characteristics,but a precise inverse system depends on the system parameters.This paper analyzes the robustness of an inverse-system based approach proposed by the authors,which is used for the output power control of variable-pitch wind energy conversion systems（VP-WECSs）.An improved inverse-system method was developed with a robust compensator.A hardware-in-loop platform of a VP-WGS was designed with the performance of the method evaluated.Experimental results show that the method can control the output power of the WECS for variable wind speed conditions even with large parameter perturbations,with the exception of easy implementation.