Digital Deadbeat and Repetitive Combined Control for a Stand-Alone Four-Leg VSI
Digital Deadbeat and Repetitive Combined Control for a Stand-Alone Four-Leg VSI
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DOI：
10.1109/tia.2017.2734049
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发表时间：
2017-07
影响因子：
4.4
通讯作者：
A. Lidozzi;C. Ji;L. Solero;P. Zanchetta;F. Crescimbini
中科院分区：
文献类型：
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作者：
A. Lidozzi;C. Ji;L. Solero;P. Zanchetta;F. Crescimbini
本文提出了一种新的组合控制拓扑结构。针对四桥臂电压型逆变器的单机应用，提出了无差拍控制器和重复控制器联合工作的方法。在这种工作模式下，专用控制器必须调节逆变器的输出电压，这些电压是在电力滤波器的输出端测量的。在所提出的组合控制中，无差拍快速补偿因负载变化而引起的输出电压变化，而重复控制提供所需的谐波补偿能力，当必须馈送平衡和不平衡的非线性负载时，这些能力是强制性的。因此，确保了高动态性能，并且输出电压中几乎没有谐波。事实上，所实现的实验测试证明，所产生的输出电压总谐波畸变率约为0.5%，并且在高度不平衡和非线性负载的情况下，还补偿了开关管死区带来的失真。
This paper deals with a newly conceived combined control topology. Deadbeat and repetitive controllers are proposed to operate jointly in a four-leg voltage-source inverter for stand-alone applications. In such a mode of operation, a dedicated controller has to regulate the inverter output voltages, which are measured at the output of the power filter. In the proposed combined control, the deadbeat rapidly compensates the output voltage variations due to load changes, whereas the repetitive control provides the required harmonic compensation capabilities that are mandatory to comply with the standards when balanced and unbalanced nonlinear loads have to be fed. As a consequence, high dynamic performance is assured, as well as harmonics in the output voltages are almost absent. In fact, the achieved experimental tests have verified that resulting output voltage total harmonic distortion is around 0.5%, and in the case of highly unbalanced and nonlinear loads, compensating also the distortion introduced by the switches’ deadtime.