Optimized EMS Real-Time Simulation and Validation for Singapore Pulau Ubin Microgrid

This paper presents a cost-optimized Energy Management System (EMS) algorithm developed for Singapore Palau Ubin Microgrid islanded mode operation. The microgrid comprises two PV MPPT DC/DC inverters, one battery DC/DC converter, one grid-forming DC/AC inverter, one diesel generator (DG), and a few distributed loads. The proposed micro grid EMS utilizes the PV irradiation profile and the load profile to distribute the power between DG and the battery storage system to meet the load demand at a minimal cost. The OPAL-RT real-time simulation is implemented to validate the optimized microgrid EMS power distribution. The real-time simulation results prove that the battery power profile matches with EMS calculation results even though the battery power reference cannot be controlled directly in the hybrid DC/AC microgrid. The stable transient performance is achieved in the micro grid real-time simulation.