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The three-phase PWM delta-switch rectifier is an unidirectional topology that presents interesting features, such robustness and high efficiency. Most of the delta-switch rectifier modulation strategies require current sector identification in order to properly apply the according voltage vectors. This is typically neglected in power factor correction applications due to the low displacement angle...
Grid synchronization is one of the most important issues of the distributed power generation system (DPGS) connected to utility network. This paper proposes a novel phase-locked loop (PLL) for synchronization of power electronic converters in unbalanced and variable-frequency environments. The method utilizes double rotating reference frames to transform the input signal and detects the positive fundamental...
The low frequency ripple in single-phase power factor correction (PFC) boost converters dramatically limits the bandwidth in standard control strategies, deteriorating the overall system performance. This paper presents the study and the implementation of a phase-locked loop (PLL)-based repetitive controller in order to improve the dynamics and the input current distortion in a PFC boost converter...
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