Optimal Energy Management Strategy for an Islanded Microgrid with Hybrid Energy Storage

다국어 초록 (Multilingual Abstract)

Due to the randomness and volatility of light intensity and wind speed, renewable generation and load management are facing new challenges. This paper proposes a novel energy management strategy to extend the life cycle of the hybrid energy storage system (HESS) based on the state of charge (SOC) and reduce the total operating cost of the islanded microgrid (MG). In this paper, a demand response (DR) optimization model of independent MG is introduced considering the total cost of MG operation, carbon emission and new energy consumption penalty. Meanwhile, by analyzing the SOC of the HESS, starting and stopping criteria (SSC) of diesel generator (DG), residential load classifi cation, an optimal energy management strategy for island grid operation of HESS based on DR is proposed. Then, the particle swarm optimization (PSO) algorithm with improved acceleration factor is applied to solve the optimization scheme. The simulation results show that a novel energy management strategy has improved the economical and reliable performance of the independent MG via setting the charging and discharging criteria of HESS and SSC of DG. Moreover, fl exible scheduling of part controllable loads can be used to improve the renewable energy consumption rate and reduce the loss of load rate.

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