电压暂降是电力系统中危害最大的电能质量问题之一。针对电压暂降问题,文章提出了基于超级电容的直流动态电压恢复器(Dynamic Voltage Restorer,DVR)装置,完成了该装置的主电路以及超级电容充放电的控制方法,并对该装置进行了仿真和试验。试验证明,该装置在电网发生电压暂降的时候,可以有效地支撑敏感负荷的直流电压,降低电压暂降对敏感负荷的影响。 Voltage sag is one of the most harmful power quality problems in the power system. Aiming at the problem of voltage sag, this paper presents a DVC (Dynamic Voltage Restorer) device based on supercapacitor. The main circuit of the device and the control method of supercapacitor charging and discharging are completed, and the device is simulated And test. The test proves that the device can effectively support the DC voltage of the sensitive load and reduce the influence of the voltage sag on the sensitive load when the voltage sags in the grid.