eng Science and Education Publishing American Journal of Electrical and Electronic Engineering 2328-7357 2020-08-23 8 4 102 107 10.12691/ajeee-8-4-1 AJEEE2020841 article Yuqi Pang yuqipang@163.com 1 Xiaotian Xu 1 Xunyu Liu 1 Xinyuan Zhang 1 Nanjing Normal University, Nanjing, Jiangsu, China Dynamic voltage restorer (DVR) is a series compensation device with energy storage device, which can compensate reactive power and active power. DVR is composed of power module, action module, control module and sampling module. The core of the research lies in its topology and control strategy. This paper starts from the above two aspects, studies the working principle and structural characteristics of the dynamic voltage restorer, and analyzes the topological structure and the function of the structure of the dynamic voltage restorer. A voltage and current double closed-loop control strategy is proposed, which can effectively compensate the transient voltage. A DVR model is built in Matlab/Simulink, and power failure and three-phase short circuit are simulated. A double closed-loop control strategy based on voltage and current is applied. The simulation results show the feasibility and effectiveness of the control strategy. http://pubs.sciepub.com/ajeee/8/4/1/ajeee-8-4-1.pdf dynamic voltage restorer PLL phase-locked loop PI linear control three-phase short circuit