双馈风电机组网侧变换器L_2增益干扰抑制控制

L2-gain disturbance attenuation control of the grid-side converter in doubly fed induction generator wind turbine

为减小外界干扰对直流母线电压的影响,实现双馈风电机组网侧变换器的控制目标,文章设计了网侧变换器L2增益干扰抑制控制律。该控制策略以广义Hamilton理论为基础,避免了求解HJI偏微分不等式,减小了建模误差对控制性能的影响。仿真结果表明,文章设计的控制律能够实现系统渐进稳定控制,对外界干扰有较好的抑制能力,改善了控制系统的性能。

In order to reduce the influence of external interference on the DC bus voltage and realize the control objective of the grid-side converter in doubly fed induction generator wind turbine,a L2- gain disturbance attenuation control law was designed in this paper. Based on the generalized Hamilton theory,the control strategy avoided solving the HJI partial differential inequalities and reduced the effect of modeling errors on the control performance. The simulation results show that the proposed control law in this paper can realize an asymptotic steady control, effectively suppress the interference, and improve the performance of control system.