The Dual voltage source inverter (DVSI) scheme is proposed to improve the power quality and reliability of the micro grid systems. The proposed scheme is comprised of two inverters, which enables the micro grid to exchange power generated by the distributed energy resources (DER). The two inverters are main voltage source inverter (MVSI) and auxiliary voltage source inverter (AVSI). DVSI scheme, in which the power generated by the micro grid is injected as real power by the MVSI and the reactive power and harmonics is performed by the AVSI. The MVSI can always be used to injected real power to the grid, if sufficient renewable power is available at the dc link. In the DVSI scheme, as total load power is supplied by two inverters, power losses across the semiconductor switches of each inverter are reduced. This increases its reliability as compared to a single inverter with multi-functional capabilities. The control algorithms are developed by synchronous reference frame theory (SRFT) to operate the DVSI in grid connected mode. These features make the DVSI hopeful option for supplying sensitive loads. This proposed result is verified with MATLAB simulation.
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