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Robust MIMO Controller Design for VSC-Based Microgrids: Sequential Loop Closing Concept and Quantitative Feedback Theory
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DOI：10.1109/TSG.2021.3119973.png)
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摘要
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Like other multi-input multi-output (MIMO) systems, adverse effects of interactions among control loops on the system performance is one of the most challenging issues in the control of microgrids (MGs). In this paper, a robust MIMO controller is proposed for the MGs to solve the problem of power sharing among its distributed generators systematically. To this end, the relative gain array (RGA) matrix is used to address the problem of input-output pairing, and adverse effects of interactions among the control loops are decreased by designing proper pre-compensators. The sequential loop closing technique is employed, and the quantitative feedback theory (QFT) is used to achieve robust stability, the robust tracking performance, and the desired level of disturbance attenuation for all the control loops. The simulation and experimental results reveal the desirable and acceptable performance of the proposed control strategy.
Keyword:
Power transmission lines
Uncertainty
MIMO communication
Transmission line matrix methods
Reactive power
Robust stability
Poles and zeros
Microgrid
quantitative feedback theory
robust MIMO control
sequential loop closing
期刊
IF:
9.8
论文数:
5.7K
被引数:
4.3W
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