Power Quality Survey in a State of the Art Microgrid

Abstract

The power quality in a state of the art microgrid has been examined using power quality analysers from Elspec Ltd and A-Eberle GmbH. The microgrid employs PV, CHP and three battery banks with a total of 120 kW / 204 kWh dividing the microgrid into three subnetworks with different network topologies. Different power quality measurements during different stages of construction shows that there are some power quality issues in the microgrid. These issues relate to transitioning to island mode, increase of harmonic noise during island mode, and undesirable equipment interactions. These are increasingly important issues to address as microgrids are becoming more widely adopted and increasingly complex.