An Improved Interleaved Boost Converter with High Voltage Gain and Reduced Switching Losses for Photovoltaic Panels

In this paper, an improved structure for interleaved boost converter is proposed for photovoltaic applications. The proposed topology comprises of four stages of boost converter connected in parallel along with two voltage multiplier converters at the output side. The proposed topology can substantially increase the level of generated voltage by PV panel which is an important advantage of proposed structure. To control the switches of proposed topology, pulse-width modulation technique is used. It is important to note that the high voltage gain of presented structure is obtained for lower values of the duty cycle of switches. It causes the voltage and current stress on the used switches to be reduced. To extract maximum power from PV panel, the switches of proposed topology is controlled using perturb & observe (P&O) algorithm. All mathematical analysis on the proposed topology consisting of voltage stress on switches, diodes and voltage gain are provided. To verify the performance and theoretical analysis of the proposed structure, simulation results are presented using PSCAD/EMTDC software. It is shown that both theoretical and simulation analysis are in complete agreement to each other.

کلیدواژه ها:

Interleaved ، Boost ، Voltage Gain ، PV Panel ، MPPT