高压直流输电系统的自抗扰控制方法

对象模型的不确定性和状态量微分信号难以提取一直是阻碍基于确定性模型的HVDC非线性控制方法投入实际应用的因素。文中将非线性自抗扰方法应用于HVDC系统的控制，利用非线性变换将HVDC详细模型进行反馈线性化，提出了基于非线性自抗扰控制的整流侧定电流和逆变侧定熄弧角控制方法。数字仿真表明，该控制方法适用于较大的模型不确定性和内外扰动，具有很强的鲁棒性。

STUDY ON AUTO-DISTURBANCE-REJECTION CONTROL FOR HVDC SYSTEM

The uncertainty of the accurate models and the unavailability of the differential signals are the bottle neck of HVDC nonlinear control putting into practicality. The paper introduces a novel nonlinear control method, namely auto disturbance rejection control method (ADRC), into the HVDC system. The HVDC accurate models are linearized by nonlinear transformation. The constant current ADRC for the rectifier and the constant extinction angle ADRC for the inverter are proposed. The simulation results show that the designed controller has excellent control performance, especially outstanding adaptability and robustness against model uncertainty and internal and external disturbances.