DESIGN AND DEVELOPMENT OF GRID TIE INVERTER WITH CLOSED LOOP SPWM SINGLE STAGE THREE SWITCH SYNCHRONIZED AND BUCK-BOOST PRINCIPLE

Ambika Naik, Praveen Naik, Uttam Sattpute

Abstract: The project aims the devise topology of single stage, three switch, closed loop SPWM control photovoltaic inverter for grid tie residential application. Predictable buck-boost GTI used in photovoltaic application are of manifold stage inverter systems, encompass dc-ac-dc converters added to achieve a raised dc voltage before inversion. Additional stage require more power machinery and also more power loss results, Even though a two-stage buck-boost inverter can reach significantly high power capability, which introduces circuit density as well as adds up the cost. In disparity with existing system project proposes the intend of a three-switch single stage grid connected buck-boost inverter, where switching losses to a great extent reduced as number of switches and also flyback, buck boost function principles are applied to match up with solar energy accessibility variation. For switching power circuit blend of square wave and SPWM is used, with kind of combination switching frequency reduces to such a level where switching losses significantly reduced. To realize Grid synchronization Strategy sine wave beginning from grid will be used as orientation signal for SPWM. To regulate inverter immediate ac output closed loop control scheme is engaged. Implementation of simple controller format with which output is stabilized as fast as probable. Advantages of this method are established by simulation of a grid-connected single-stage three switch, closed loop SPWM buck-boost inverter..

Keywords: GTI, Buck-Boost, SPWM, and Square wave etc…

DOI: https://doi.org/10.15623/ijret.2015.0404097