Power management scheme development for large-scale solar grid integration

Abstract

AbstractAs solar power is an intermittent source of energy, it causes uncertainties when connected to the electrical grid. This work presents an optimised power management system for the integration of large-scale solar with improved voltage profile and power quality in compliance with the Malaysian Grid Code Requirements of 0.95–1.05 p.u. at the Point of Common Coupling. An integration of volt-var regulation using a smart inverter for solar photovoltaic system and optimised capacitor placements to attain a voltage profile close this Grid Code Requirements on all buses in the IEEE-9 bus will be carried out. The 116 MWp (peak) solar farm will be modelled to obtain the load profile of electricity injected into the grid on an annual hourly basis. This will be used to model the solar bus in the power system to test the changes in voltage profile, voltage deviations and reactive power flow. In the final results, the voltage profile improved to a range of 0.94–1.01 p.u. in the IEEE-9 bus even for the worse case scenarios of solar power penetration which happens from 12 to 1 pm.