A dual voltage source inverter scheme for power quality enhanced microgrid system

This paper presents a dual voltage source inverter (DVSI) scheme for microgrid system, which enhances the power quality and reliability of the microgrid system. The scheme comprises of two inverters namely the main inverter (MVSI) and the auxiliary inverter (AVSI). The DVSI scheme enables the microgrid to exchange power generated by the distributed energy resources (DER) to the loads and in addition to this compensate unbalanced and nonlinear load. The grid connected mode and islanded mode of operations of the DVSI scheme are studied in this paper. Instantaneous symmetrical component theory (ISCT) is made used to generate the reference currents for the inverter. Detailed simulation study is conducted in PSCAD/EMTDC to verify the proposed ideas.