A NOVEL INTERLEAVED SOFT SWITCHING TRI-STATE BOOST CONVERTER FOR A PV SYSTEM APPLICATION

Abstract

In this paper, a novel interleaved soft switching tri-state boost converter (ISTBC) is proposed for a
PV system. In general PV systems comprises of PV cells which are able to generate low voltages. In
order to nourish the high power electrical appliances it is necessary to design high gain converters.
The proposed topology is developed by conceiving the idea that interleaved connection of converters
enhances the overall system rating with the improvement of power handling capabilities and the
reduction of ripple content in the source current and in output voltage. But the presence of a right-halfplane (RHP) zero in the small signal analysis of all interleaved boost converters rises the nonminimum phase problem. The best choice to eliminate this RHP zero there by voltage dip is the
adaption of tri-state boost converter (TBC) topology. Therefore, in the proposed converter topology the
advantages of both Inter leaved boost converter (IBC) and TBC are to be imported. A soft switching
method is also adapted in the proposed topology to reduce the switching losses. Operation of the
proposed ISTBC topology is presented through the mode wise analysis. The performance analysis of
ISTBC fed with PV generation system is studied along with the TBC, interleaved TBC (ITBC) in
MATLAB Simulink Platform. It is found that the proposed ISTBC is with less ripple content and high
voltage gain as compared with the TBC and ITBC.