The paper proposes an interleaved high gain boost converter with quadratic function for high power PV system. The proposed converter employs a diode-capacitor (DC) snubber circuit designed to absorb the transient spike generated by the coupled inductor leakage inductance, reduce excess voltage stress and boost the output voltage once again. This design uses interleaved technology for the high gain boost converters to reduce power losses and save cost. This paper will introduce interleaved technology in the proposed high power and high gain boost converter. Experimental and simulation results are used to verify the design and performance. The 500 W interleaved high gain boost converter design was measured to 93.1% efficiency. The designed interleaved conversion architecture with the maximum power reaches 1 kW with average converter efficiency over 90%.
This paper proposed a high voltage conversion ratio cascade boost converter topology composed two stages of converters. First stage boosts the input source voltage twice larger by using the double-mode switched-capacitor cells converter (SCC). Second stage provides a high voltage conversion ratio boost converter with a couple inductor and diode-capacitor (DC) snubber. For achieving higher efficiency, soft-switching technique is used to design the proposed converter. The converter topology analysis and design are described in detail. Results of simulation and experimental measurements are carried out to verify the performances of the proposed high voltage conversion ratio cascade boost converter under continuous conduction modes.
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