周雪松,周泳良,马幼捷.基于降阶线性扩张状态观测器的风电并网逆变器线性自抗扰控制*[J].电测与仪表,2023,60(8):157-163. Zhou Xuesong,Zhou Yongliang,Ma Youjie.Linear active disturbance rejection control of wind power grid connected inverter based on reduced order linear extended state observer[J].Electrical Measurement & Instrumentation,2023,60(8):157-163.
基于降阶线性扩张状态观测器的风电并网逆变器线性自抗扰控制*
Linear active disturbance rejection control of wind power grid connected inverter based on reduced order linear extended state observer
Aiming at the problem that the DC bus voltage of wind power grid connected inverter is easily affected by the grid voltage fluctuation and load disturbance, an improved linear active disturbance rejection control (LADRC) applied in the voltage outer loop is proposed in this paper. Firstly, the mathematical model of the wind power grid connected inverter in the d-q rotating coordinate system is established. On this basis, the linear active disturbance rejection control Based on the reduced order linear extended state observer is designed, which reduces the phase lag of the observer and improves the disturbance observation accuracy of the system. Then, a lead lag correction link is added to the total disturbance channel of the observer to reduce the noise amplification effect of the observer. Finally, the frequency domain characteristics of the improved LADRC control strategy are analyzed. The simulation results show that the proposed control strategy has better control effect on the DC bus voltage of grid connected inverter than the traditional LADRC control strategy.
