基于无差拍的DVR的控制算法及仿真

Control Algorithm and Simulation for DVR Based on Deadbeat

动态电压恢复器(DVR)是目前解决电压质量问题的一种最经济、最有效的电能质量调节器。针对DVR的电压补偿信号的不确定性,将无差拍控制思想应用于DVR中,通过理论分析得到了一种DVR的无差拍控制算法,给出了算法详尽的推导过程,并用MATLAB/SIMULINK就电网电压暂降和谐波问题对其进行了仿真研究,结果表明:DVR的输出电压能良好的跟踪畸变电压分量,使负荷电压在电网电压畸变时仍能恢复到正常电压水平;而且无差拍控制还具有动态响应快,实现方便等优点。

Dynamic Voltage Restorer is the most economical and effective power quality conditioner to solve voltage quality problems at present. Concerning the indetermination of voltage compensate signal in DVR,the idea of deadbeat control to DVR was applied and a deadbeat control algorithm was found through theoretic analysis. It also offered the algorithm’s particular deduction process. With regard to the problems of grid voltage sad and harmonics,the algorithm was simulated and studied by MATLAB/SIMU_ LINK. The results show that the output voltage of DVR is capable of tracking compensate voltage so as to make the load still works at a normal level when the grid voltage’s disturbances exist. Besides,the algorithm has advantages of fast response dynamically and carrying out conveniently.