动态电压恢复器(DVR)是解决电压质量问题的有效手段。DVR的控制中常采用电流内环来调节被控对象,增加阻尼。但电流内环不但需要引入额外传感器,还会增加系统设计和调试的复杂程度。文中提出一种无电流内环的控制方法,应用陷波滤波器来设置阻尼,并采用前馈来提高响应速度;在电压环路中应用重复控制器,可使系统具有较高的稳态精度和良好的谐波抑制能力。该方法设计简单,易于实现,且能减少硬件成本。仿真以及在2.2kW装置上的实验结果均验证了该控制方法的有效性和实用性。 Dynamic Voltage Restorer (DVR) is an effective solution to the problem of voltage quality. DVR control often use current inner loop to adjust the controlled object, increase the damping. However, the current inner loop not only needs to introduce additional sensors, but also increases the complexity of system design and debugging. In this paper, a control method of currentless inner loop is proposed. The notch filter is used to set the damping and the feedforward is used to improve the response speed. The application of repetitive controller in the voltage loop can make the system have high steady-state accuracy And good harmonic suppression. The method is simple to design, easy to implement and can reduce the hardware cost. Simulation and experimental results on 2.2kW devices verify the effectiveness and practicability of this control method.