TY - GEN
T1 - High efficiency wide load range buck/boost/bridge photovoltaic microconverter
AU - Hester, Richard K.
AU - Thornton, Christopher
AU - Dhople, Sairaj
AU - Zhao, Zheng
AU - Sridhar, Nagarajan
AU - Freeman, Dave
PY - 2011
Y1 - 2011
N2 - Series strings of photovoltaic modules with integrated dc-dc microconverters can harvest more energy compared to conventional string-inverter architectures if the arrays are partially shaded or the modules mismatched. This work presents a multi-mode dc-dc converter as a candidate microconverter topology for photovoltaic modules. The topology constitutes a single inductor and four switching devices and can function in either buck, boost or an intermediate bridge mode based on the load. The proposed maximum power point tracking scheme is capable of tracking the true maximum even in partially-shaded PV modules. An experimental prototype demonstrates efficiency above 95 % at 215 W over a load range of 3 A to 7 A.
AB - Series strings of photovoltaic modules with integrated dc-dc microconverters can harvest more energy compared to conventional string-inverter architectures if the arrays are partially shaded or the modules mismatched. This work presents a multi-mode dc-dc converter as a candidate microconverter topology for photovoltaic modules. The topology constitutes a single inductor and four switching devices and can function in either buck, boost or an intermediate bridge mode based on the load. The proposed maximum power point tracking scheme is capable of tracking the true maximum even in partially-shaded PV modules. An experimental prototype demonstrates efficiency above 95 % at 215 W over a load range of 3 A to 7 A.
UR - http://www.scopus.com/inward/record.url?scp=79955755269&partnerID=8YFLogxK
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U2 - 10.1109/APEC.2011.5744613
DO - 10.1109/APEC.2011.5744613
M3 - Conference contribution
AN - SCOPUS:79955755269
SN - 9781424480845
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 309
EP - 313
BT - 2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
T2 - 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Y2 - 6 March 2011 through 10 March 2011
ER -