Inverter-based Distributed Generation Control using Droop/Isochronous Load Sharing

Distributed generation technologies such as photovoltaic, fuel cells and micro turbines are emerging. However, these sources require interfacing units to provide the necessary crossing point to the grid. The core of these interfacing units is power electronics technologies such as inverters since they are fundamentally multifunctional and can provide not only their principle interfacing function but various utility functions as well. This paper shows the possibility of adapting the droop/isochronous control methodologies used by synchronous generators in conventional power systems to provide frequency control and power balance to inverter-based distributed generation power systems.