【摘要】 动态电压恢复器(DVR)是解决电网电压凹陷的一种经济有效方案,本文提出了一种基于移相的动态电压恢复器凹陷补偿方法。简要介绍了DVR基本原理和电路组成,在此基础上研究了电压凹陷的检测,通过超前数字移相和一些的简单代数运算,实现了瞬时跟踪理想的电压凹陷补偿参考信号;用该参考信号驱动控制PWM发生器,最后控制DVR补偿器产生串联补偿电压量,实现了电压凹陷的实时补偿。该方法简单、实时性强。仿真结果很好地验证了该方法的合理性和有效性。更多还原

【Abstract】 With dynamic voltage restorer(DVR)being a cost-effective compensation device for voltage sags,this paper proposes a new method for sags compensation with phase-shift based on DVR.After a review of DVR,detection of voltage sags was described first.Through digital phase-shift and some simple algebraic operation,the method could follow the sags compensation reference signal well without delay.PWM signal generator was driven by the reference signal,and controlled the DVR to produce serried compensating voltage.Thus the DVR realized the real-time compensation for voltage sags.The proposed method is very simple and has good dynamic performance.The simulation results prove that the method is rational and effective.更多还原