Abstract
This paper proposes a minimum phase hybrid bipolar converter (MP-HBC) to supply bipolar dc (inverted and non-inverted dc) and ac loads along with improved dynamic characteristics for photovoltaic (PV) applications. The proposed MP-HBC is developed by the integration of Cúk and SEPIC converters with some circuit modifications to achieve multi outputs along with minimum phase characteristics. The circuit modifications remove right half plane zeros (RHPZs) from the proposed MP-HBC and make it a linear converter. The proposed MP-HBC can achieve higher bandwidth and improved phase margin simultaneously due to the minimum phase characteristics. Further, it can operate at high load current and require simple controller design to regulate the dc output voltages. The other advantages of MP-HBC such as continuous input and output current, and buck-boost capabilities facilitate maximum power point tracking (MPPT) operation. A scaled-down laboratory prototype of 450 W is developed and implemented using field programmable gate array (FPGA) based digital platform for PV based performance analysis of MP-HBC.
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