基于自抗扰控制的VSC-HVDC控制器设计

Controller Design for VSC-HVDC Based on Active Disturbance Rejection Control

对电压源型换流器高压直流输电系统的暂态数学模型进行了研究,提出了直接电流控制策略和双闭环控制器结构。内环电流控制采用自抗扰控制器实现电流的解耦,达到快速跟踪参考电流的目的;外环控制基于稳态逆模型设计了PI控制器,实现有功、无功功率的独立调节。通过Matlab/Simulink对VSC-HVDC系统控制进行了仿真分析,仿真结果验证了所设计的控制器具有良好的控制性能和较好的鲁棒性。

This paper studies the transient mathematical model of VSC-HVDC system; and proposes direct current control strategy and dual closed-loop control structure. Active disturbance rejection control （ADRC） technique is adopted in inner loop current control to track the reference currents rapidly. Based on inverse steady-state model, the PI controllers are designed in outer loop control to realize independent regulation of active and reactive power. Simulation results with Matlab/Simulink illustrate that the designed controller achieves excellent control performance and preferable robustness.