Resonant Controllers With Three Degrees of Freedom for AC Power Electronic Converters
Resonant Controllers With Three Degrees of Freedom for AC Power Electronic Converters
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DOI：
10.1109/tia.2015.2448057
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发表时间：
2015-06
影响因子：
4.4
通讯作者：
A. Lidozzi;M. di Benedetto;S. Bifaretti;L. Solero;F. Crescimbini
中科院分区：
文献类型：
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作者：
A. Lidozzi;M. di Benedetto;S. Bifaretti;L. Solero;F. Crescimbini
并网和独立应用需要精确控制滤波器输出电压的逆变器。如今，谐振控制器（RC）的实现问题和控制性能之间的一个很好的折衷。然而，未知的性质和供应的负载的大小影响的动态控制行为，并可能降低控制系统的有效性。介绍了一种新的RC结构，其目的是提供三个自由度，并允许我们独立地选择控制器的幅度，宽度和相位。为了充分利用建议的RC形式，在线调谐过程的基础上输出滤波器的分析也提出了。据此，可以在回路中放置几个谐振补偿器以实现更好的输出电压波形（即，较低的总谐波失真）。
Grid-connected and stand-alone applications need inverters that accurately control the filter output voltages. Nowadays, resonant controllers (RCs) represent a good tradeoff between implementation issues and control performances. However, the unknown nature and size of supplied loads affect the dynamic control behavior and may reduce the effectiveness of the control system. A new structure of RC is introduced with the purpose of providing three degrees of freedom and allowing us to select independently the controller's magnitude, width, and phase. In order to fully take advantage of the proposed RC form, the online tuning procedure based on the output filter analysis is also proposed. According to that, several resonant compensators can be placed in the loop to achieve a better output voltage waveform (i.e., lower total harmonic distortion).