@article{chen_huang_yu_2013, title={A High Step-Up Three-Port DC-DC Converter for Stand-Alone PV/Battery Power Systems}, volume={28}, ISSN={["1941-0107"]}, DOI={10.1109/tpel.2013.2242491}, abstractNote={A three-port dc–dc converter integrating photovoltaic (PV) and battery power for high step-up applications is proposed in this paper. The topology includes five power switches, two coupled inductors, and two active-clamp circuits. The coupled inductors are used to achieve high step-up voltage gain and to reduce the voltage stress of input side switches. Two sets of active-clamp circuits are used to recycle the energy stored in the leakage inductors and to improve the system efficiency. The operation mode does not need to be changed when a transition between charging and discharging occurs. Moreover, tracking maximum power point of the PV source and regulating the output voltage can be operated simultaneously during charging/discharging transitions. As long as the sun irradiation level is not too low, the maximum power point tracking (MPPT) algorithm will be disabled only when the battery charging voltage is too high. Therefore, the control scheme of the proposed converter provides maximum utilization of PV power most of the time. As a result, the proposed converter has merits of high boosting level, reduced number of devices, and simple control strategy. Experimental results of a 200-W laboratory prototype are presented to verify the performance of the proposed three-port converter.}, number={11}, journal={IEEE TRANSACTIONS ON POWER ELECTRONICS}, author={Chen, Yen-Mo and Huang, Alex Q. and Yu, Xunwei}, year={2013}, month={Nov}, pages={5049–5062} }
 @inproceedings{chen_yu_huang_2012, title={A New nonisolated three-port DC-DC converter with high step-up/down ratio}, DOI={10.1109/ecce.2012.6342633}, abstractNote={A new nonisolated three-port dc-dc converter integrating PV and battery power is proposed in this paper. The topology includes two coupled inductors and two active-clamp circuits. The coupled inductors are used to achieve high step up/down gain and to reduce the voltage stress on both primary and auxiliary switches. Two sets of active-clamp circuits in the proposed converter are used to recycle the energy stored in the leakage inductors. Therefore, the system efficiency can be improved. Charging/discharging transition of the battery is autonomous while tracking the maximum power of PV source and regulating the output voltage simultaneously. When the charging voltage is too high, the control loop of PV port will be switched from maximum power point tracking (MPPT) to battery voltage regulation. Experimental results of a 200W laboratory prototype are presented to verify the performance of the proposed three-port converter.}, booktitle={2012 IEEE Energy Conversion Congress and Exposition (ECCE)}, author={Chen, Y. M. and Yu, X. W. and Huang, A. Q.}, year={2012}, pages={1520–1526} }