CAJ | 학술논문

提出了一种应用于单相动态电压恢复器（DVR）数字控制方法。采用单相构造三相的方法可以得到需要的旋转坐标量。使用旋转坐标系下的重复控制模块，该模块可以等效为静止坐标下的一组奇次谐波谐振器，从而可以补偿单相系统中的奇数次谐波。加入前馈和PR控制器可以增加基波频率处的增益，加快动态响应。文中控制系统无电流环，结构被简化。仿真和实验结果表明，系统能有效抑制谐波，对电压跌落和负载扰动响应迅速。
제출료일충응용우단상동태전압회복기（DVR）수자공제방법。채용단상구조삼상적방법가이득도수요적선전좌표량。사용선전좌표계하적중복공제모괴，해모괴가이등효위정지좌표하적일조기차해파해진기，종이가이보상단상계통중적기수차해파。가입전궤화PR공제기가이증가기파빈솔처적증익，가쾌동태향응。문중공제계통무전류배，결구피간화。방진화실험결과표명，계통능유효억제해파，대전압질락화부재우동향응신속。
Digital controllers apphed in the Dynamic Voltage Restorer （DVR.） are very important and always determines the DVR＇ s performance. A kind of digital controller was proposed for single-phase DVRs. The synchronous-flame parameters can be obtained by transfomaing the single-phase structure into a three-phase one. Then the synchronous-frame repetitive controller, which can also be regarded as a series of odd harmonics resonant controller operating in stationary frame, was used to compensate odd harmonics in single-phase systems. Moreover, the feedforward and the proportional-resonant parts would provide the system with higher gain at the fundamental frequency and faster dynamic response. Apart from that, the controller was simpler than others without the current loop. The simulation and experiment results prove that the controller proposed has a good performance in suppressing the grid harmonics and fast dynamic response towards grid sags and load disturbances.