中文摘要：

介绍一种三相独立式的动态电压恢复器（DVR），通过采用比例一积分（PI）控制算法对DVR进行恒相位补偿研究，以提高DVR的响应时间和补偿能力。应用Matlab进行系统仿真，仿真结果说明了该方法具有良好的动态性能与补偿效果。

英文摘要：

This article introduces the application of voltage-oriented control on dynamic voltage restorer（DVR）, and studies the constant phase compensation. A DVR system is simulated using Matlab. The results show excellent dynamic and static performances of the system, and thus indicate correctness and effectiveness of the proposed scheme.