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Integrated energy management system for isolated microgrids

Abstract:

This paper proposes an integrated energy management system (IEMS) for isolated microgrids considering demand response, fossil-fuel-based and renewable-based distributed generators (DGs), and energy storage systems (ESS). In the proposed approach, the unit commitment (UC) and optimal power flow (OPF) constraints are jointly included in the IEMS model, and to account for forecasting errors in renewable generation and electricity demand, a model predictive control (MPC) technique is adopted. The proposed IEMS model is compared with a "standard" decoupled energy management system (DEMS) in which the dispatch problem is decomposed into UC and OPF sub-problems, and the impact of MPC implementation and forecast errors are also analyzed. Both IEMS and DEMS approaches are tested and compared using a modified CIGRE medium voltage benchmark system. The results demonstrate the effectiveness of the proposed IEMS and MPC techniques.