Power Quality Study of Microgrid with Single Large Solar PV and Distributed Small Solar PVs Plant: Case Study Karampuang Island

Abstract

Indonesia already implements microgrids in small islands and very isolated areas. Usually, those microgrids use renewable energy power plants such as solar PV. This is also in line with the Indonesia Government's step to deploy more renewable energy in its power generation system to reduce Greenhouse Gasses Emissions. One of the several microgrids with solar PV plants already been implemented in Indonesia is Karampuang Island Microgrid. Currently, their electricity supply by four Solar PV microgrids which are separated and not connected yet. In this study, two schemes of Karampuang microgrid expansion are examined. The first scheme uses a single Solar PV power plant and a battery energy storage system (BESS). The size of the Solar PV plant and BESS is the total capacity of the current condition. The second scheme is the microgrid using four distributed solar PV power plants in their current location and capacity. The Solar PV connect among them to supply the island's load in one grid. The power quality of both microgrid schemes is examined. The power quality phenomena, i.e. total harmonic distortion and temporary overvoltage of both schemes, are examined by Matlab/Simulink software simulation. The THD and temporary overvoltage in Distributed Solar PV microgrid is better than the single solar PV microgrid.