基于串并联混合结构的动态电压恢复器研究

Study on Dynamic Voltage Restorer Based on Series Parallel Hybrid Structure

以串并联混合型动态电压恢复器DVR为研究对象,对DVR的补偿策略和控制方法进行了研究,并对控制策略中的电流环和电压环的数学模型进行了简化。然后,提出了一种串并联混合型拓扑的动态电压恢复器,这种类型能简化DVR系统结构,提高DVR系统的稳定性。最后,在MATLAB/Simulink中模拟了不同时刻瞬时电压跌落、骤升的工况,仿真结果证明了该检测方法和控制策略具有良好的快速性和准确性。

In this paper,a series-parallel hybrid dynamic voltage restorer(DVR)is taken as the research object.The mathematical model of the current loop and voltage loop in the control strategy is simplified.Then,a series-parallel hybrid topology dynamic voltage restorer is proposed.This type can simplify the structure of the DVR system and improve the stability of the DVR system.Finally,the working conditions of instantaneous voltage drop and swell at different moments are simulated in MATLAB/Simulink.The simulation results prove that the detection method and control strategy used in the DVR in this paper have good fastness and accuracy.