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对级联多电平的结构进行了研究,然后提出将级联多电平电路应用于有源电力滤波(APF)的方法,并使用matlab状态软件对上述方法应用仿真模拟,得到预期结果。文章所涉及到的应用系统采用载波移相的调制技术,在电流的控制上采用PI调节和重复控制相结合的控制方法。仿真结果表明这种基于级联多电平的有源电力滤波器在电网电流存在畸变的情况下,能很好地跟踪谐波,并且具有很好的动态响应和较高的检测精度。这对提高有源电力滤波器应用的电压等级有促进作用。
The structure of cascaded multilevel is studied. Then, a method of applying cascaded multilevel circuit to active power filter (APF) is proposed, and the matlab state software is used to simulate the above method to get the expected result. The application system involved in the article uses the carrier phase shift modulation technology, the current control using PI regulation and repetitive control combination of control methods. The simulation results show that the cascaded multi-level active power filter can track harmonics well, and has good dynamic response and high detection accuracy under the condition of grid current distortion. This is to improve the application of the active power filter voltage level has contributed.