CAJ | 학술논문

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2.2 kW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。
동태전압회복기(DVR)시해결전압질량문제적유효수단。DVR 적공제중상채용전류내배래조절피공대상，증가조니。단전류내배불단수요인입액외전감기，환회증가계통설계화조시적복잡정도。문중제출일충무전류내배적공제방법，응용함파려파기래설치조니，병채용전궤래제고향응속도；재전압배로중응용중복공제기，가사계통구유교고적은태정도화량호적해파억제능력。해방법설계간단，역우실현，차능감소경건성본。방진이급재2.2 kW장치상적실험결과균험증료해공제방법적유효성화실용성。
The dynamic voltage restorer(DVR)is efficient in solving the voltage quality problems.In the DVR control system, the inner loop is usually designed to regulate the control object and enhance the damping of the system.However,the inner current loop needs extra sensors.Moreover,it will make the processes of design and debugging more complex.This paper proposes a control strategy without the inner current loop.In the proposed system,a notch filter is employed to improve the damping and the feedforward controller is used to increase the response speed.In addition,a repetitive controller is introduced to improve the steady state performance and the harmonics suppression capacity.The proposed control method is simple to design,easy to achieve and economically feasible for implementations.Simulation and experiment results with a 2.2 kW DVR verify the effectiveness and practicability of the proposed control method.