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M.Tech / M.E / PhD Thesis | Electrical Engineering | India | Volume 3 Issue 11, November 2014
A High Step-Up Three-Port DC-DC Converter for Stand-Alone PV/Battery Power Systems
Dr. K. Ravichandrudu | P. Suman Pramod Kumar | K. Seshu
Abstract: A three-port dcdc 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.
Keywords: Converter, Photovoltaic cell, Solar cell, Boost Converter
Edition: Volume 3 Issue 11, November 2014,
Pages: 1751 - 1758
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