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The conventional Buck PFC converter adopts constant duty cycle control (CDCC), which can improve the PF to some degree. However, the peak and RMS values of the inductor current are large, which also occurs to the switch and diode. This paper derives the expressions of the input current and PF of DCM Buck PFC converter, and based on which, a kind of injecting 3rd current harmonic control (ICHC) is...
This paper presents a single phase grid-connected PV system integrating energy storage system (ESS) using cascaded multilevel inverter. A Discrete Fourier Transform (DFT) Phase Locked Loop (PLL) method is proposed to improve system dynamic performance. A coordinated active and reactive power management (ARPM) strategy is developed based on the dual-stage DFT PLL method. The point of common coupling...
This paper proposes two cascaded multilevel inverter topologies and corresponding control strategies applied to motor drive that interfaces single DC source and ultra-capacitor (UC) energy storage elements. In the first topology, a dynamic control method is developed, which allows the UC to provide reactive power to cancel lower order harmonics through a conditioning inverter both in steady state...
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