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Transformation of Existing Commercial Building Cluster Towards Renewable Rich Microgrid: A Case Study for Marina Bay Sands Singapore

Abstract:

Existing commercial-building-clusters in Singapore commonly draw entire electrical power from the fossil-fuel based utility grid. In this paper, a case study of potential sustainability efforts at Marina Bay Sands (MBS) building-cluster is presented to demonstrate the feasibility and benefits of its transformation towards a renewable rich microgrid. A careful investigation shows that a hybrid AC/DC microgrid installation with solar energy and battery energy storage sized to 5 % and 10% respectively of the average daily energy demand is feasible, considering the economic and space constraints. It is also analysed that installation cost benefits amounting to S$ 51,000/MWh can be obtained from optimal sizing of battery energy storage, net cost savings of S$ 26,000/MWh can be obtained due to low labour charges for proposed floating solar PV installation, whereas average net daily cost savings upto S$ 41,540 can be obtained through strategic demand response measures at MBS. Simulation results for the proposed microgrid design is also presented to show stable and satisfactory 24 hour microgrid operation for various solar energy penetrations and load demand scenarios.