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- W2890694516 abstract "This paper proposes a robust current controller (CC) and dc-link voltage controller based on μ-synthesis and H <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>∞</sub> method, respectively, for a single-phase photovoltaic (PV) converter with an LCL-filter under weak grid operation. The μ-synthesis CC guarantees system robustness against weak grid uncertainties such as grid impedance variations and voltage harmonics. Moreover, the controller compensates the system delays arising from the calculation, pulsewidth modulation, and zero order hold, as well as delay uncertainties. The CC only uses the grid current feedback which eliminates the requirement for additional loops or state measurements utilized in partial or full state-feedback systems. In addition, the H <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>∞</sub> dc-link voltage controller minimizes the bus voltage fluctuations caused by variations of PV system power generation. Also, the controller ensures system robustness against such power variations, which conventional controllers fail to perform. Moreover, power decoupling is achieved by the control system without any auxiliary circuit. In addition, the stability and robust performance of the phase-locked loop in a weak grid with major impedance changes is verified. Simulation and experimental results prove the superior performance of the proposed controllers in both cases of a nominal system and a system with deviated parameters." @default.
- W2890694516 created "2018-09-27" @default.
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- W2890694516 date "2019-11-01" @default.
- W2890694516 modified "2023-10-01" @default.
- W2890694516 title "Robust Control Design for High-Power Density PV Converters in Weak Grids" @default.
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- W2890694516 doi "https://doi.org/10.1109/tcst.2018.2867212" @default.
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