动态电压恢复器（DVR）是解决动态电压质量问题的主要装置。本文提出了一种应用于电力电子变压器中的简单的动态电压恢复电路,用于输入负载电压突变的补偿。该电路采用相移调制控制方案,产生电路中全桥直流环节逆变器的脉冲,利用自带可充电电池（电容）充放电来补偿系统电压的跌落或抵消系统电压的浪涌,从而克服系统电压波动对用户的影响。通过仿真表明,该电路对改善电能质量电压突变有较好的效果。%Dynamic Voltage Restorer （DVR） is used to solve the problem of dynamic voltage quality, In this paper, a simple dynamic voltage restorer （DVR） circuit is proposed to correct input utility voltage distortions on a sensitive load in PET .This DVR which use a phase shift ＇modulation control scheme to Produce Pulse for full-bridge DC-link Inverter to regulate compensation voltage. In this session, charge and discharge of the built-in rechargeable battery （or capacitor） is used to compensate the sag or swell of the voltage. The simulation shows that the circuit to improve power quality has a good effect.
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