Design of a Quadratic Boost Converter for a Standalone PV System Based on INC MPPT Algorithm

At now days, many researches to design and to improve the efficiency of PV systems using DC/DC converters are made. In this paper, the design of a quadratic boost for PV application based on Incremental conductance (INC) maximum power point tracking (MPPT) algorithm is presented. This kind of boost is an enhanced topology which can provide a high conversion voltage ratio for small duty cycle values. It presents the combination of two boosts connected in cascade using the same active switch. The proposed topology is commanded by hard switching signal based on PWM with a variable duty cycle given by the MPPT algorithm. Furthermore, in order to verify its performance, several simulations have been carried out under Matlab/Simulink environment. Also, the practical verification is held, the INC algorithm was implemented on to Xilinx Virtex-5 (XC5VLX50-1FFG676) Field Programmable Gate Array (FPGA). The quadratic boost is verified in real time with a real PV module SM-55. Experimental results confirm the convenience of the proposed topology in PV applications.