High step-up Z-source DC-DC converter with flyback and voltage multiplier
2017 IEEE Applied Power Electronics Conference and Exposition (APEC)(2017)
摘要
Recently, because of the pollution problems of the fossil fuels, demand of renewable energy sources is increased. Solar panels and fuel-cells generate low voltage, therefore high voltage gain dc-dc converters are needed to boost their low output voltage to meet the inverters required voltage. Z-source converter has several advantages such as high voltage gain, isolated energy source from the load side, clamped switch voltage and positive output voltage polarity, therefore it is a suitable choice for high step-up applications. This paper presents a non-isolated high step-up dc-dc converter which is the derivation of z-source converter and has a higher voltage gain in comparison to the conventional converters. This advantage makes this converter a suitable choice for photovoltaic applications. Moreover, high boost voltage is obtained with low duty cycle and the energy of leakage inductances is absorbed so the efficiency is increased. A 100 W laboratory prototype to convert 24-300 V is implemented to verify the theoretical and simulation results.
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关键词
high step-up Z-source DC-DC converter,voltage multiplier,voltage gain,leakage inductances,power 100 W,voltage 24 V to 300 V
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