Shunt Active Filter for Voltage and Power Improvements within a Micro-grid

This paper discusses the application of a shunt active power filter with energy storage, for voltage and power improvements within a local power supply network (micro-grid) in presence of distributed generation. Theoretical analysis investigates the control the shunt active power filter in response to voltage sag. The shunt active filter operates over a short period of time, and is coordinated with the response of a distributed generator with a slower dynamic response. Simulation results show that the proposed method makes it possible to regulate the grid voltage at its nominal value and also allows the power sharing between the active filter and the local synchronous generator