基于系统辨识的HVDC直流有源滤波器重复控制方法研究

摘要

The advantages and disadvantages of existing control methods for DC active power filter in HVDC system are analyzed, and based on the repetitive control method applied in AC active power filters, a system identification based repetitive control method is applied to DC active power filter in HVDC systems. According to the theory of repetitive control and system identification and combined with the simulation results of MATLAB/Simulink, the structure of the controller is optimized, so that the performance of the control system is effectively enhanced. The effects of different disturbance levels on the accuracy of identification, control parameters setting and system performance are comparatively analyzed, which present the system identification based repetitive control an effective control method for DC active power filter to suppress DC harmonic current in HVDC system.%分析了已有HvDc直流有源滤波器控制方法的优缺点,并在交流有源滤波器重复控制方法的基础上,将基于系统辨识的重复控制方法应用于HvDC直流有源滤波器.根据重复控制和系统辨识原理,结合Matlab/Simulink仿真结果对控制器结构进行优化,有效提高了系统控制性能.对比分析了不同控制对象扰动水平对辨识精度、控制器参数设置以及系统性能的影响,表明基于系统辨识的重复控制是HVDC直流有源滤波器抑制直流侧谐波电流的有效控制方法.