High-Performance Quasi-Z-Source Series Resonant DC-DC Converter for Photovoltaic Module Level Power Electronics Applications
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High-Performance Quasi-Z-Source Series Resonant DC-DC Converter for Photovoltaic Module Level Power Electronics Applications
Abstract-This paper presents the high-performance quasi-Z-source series resonant DC-DC converter as a candidate topology for the PV module level power electronics applications. The converter features a wide input voltage and load regulation range thanks to the multi-mode operation, i.e. when the shoot-through pulse-width modulation and phase-shift modulation are combined in a single switching stage to realize the boost and buck operating modes, respectively. Our experiments confirmed that the proposed converter is capable of ensuring ripple free 400 V output voltage within the six-fold variation of the input voltage (from 10 to 60 V). The converter prototype assembled achieved a maximum efficiency of 97.4%, which includes the auxiliary power and control system losses.
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