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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 (DVR) is currently the most economical and effective power quality regulator to solve voltage quality problems. Aiming at the uncertainty of voltage compensation signal of DVR, the idea of no beat control is applied to DVR. An algorithm of beatless control of DVR is obtained through theoretical analysis. The detailed derivation process of the algorithm is given. The MATLAB / SIMULINK The simulation results show that the output voltage of DVR can track the distortion voltage components well and the load voltage can still recover to the normal voltage level when the grid voltage is distorted. Take control also has a dynamic response fast, easy to implement and so on.