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Coordinated Control and Energy Management of Distributed Generation Inverters in a Microgrid

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4 Author(s)
Tan, K.T. ; School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore ; So, P.L. ; Chu, Y.C. ; Chen, M.Z.Q.

This paper presents a microgrid consisting of different distributed generation (DG) units that are connected to the distribution grid. An energy-management algorithm is implemented to coordinate the operations of the different DG units in the microgrid for grid-connected and islanded operations. The proposed microgrid consists of a photovoltaic (PV) array which functions as the primary generation unit of the microgrid and a proton-exchange membrane fuel cell to supplement the variability in the power generated by the PV array. A lithium-ion storage battery is incorporated into the microgrid to mitigate peak demands during grid-connected operation and to compensate for any shortage in the generated power during islanded operation. The control design for the DG inverters employs a new model predictive control algorithm which enables faster computational time for large power systems by optimizing the steady-state and the transient control problems separately. The design concept is verified through various test scenarios to demonstrate the operational capability of the proposed microgrid, and the obtained results are discussed.

Published in:

Power Delivery, IEEE Transactions on  (Volume:28 ,  Issue: 2 )