Current control of grid connected three phase current source inverter based on medium power renewable energy system

A dc-ac converter consists combination of active switches connected with passive components which acted as interfacing unit between the dc input source and ac loads or grid ac network.Looking at the type of signal at the dc input side, the inverter can be categorized as voltage source inverter (VSI) and current source inverter (CSI).Single-phase, threephase and multilevel switching arrangements are suited for those inverter topologies, depending on the voltage and rated power requirements of the dedicated application.For grid connected application, the inverter plays an important role in the integration of distribution generation onto ac grids.Such integration is governed by strict grid codes, which include the control of active and reactive power and permissible levels of harmonics.