Journal
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Volume 9, Issue 4, Pages 1636-1647Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2018.2803342
Keywords
Energy management system; flexible frequency operation; hardware-in-the-loop simulation (HILS); mixed integer linear programming; multi-microgrids operation
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Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the South Korea [20168530050030]
- Power Generation and Electricity Delivery Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) from the Ministry of Trade, Industry & Energy, South Korea [20141020402350]
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Supply and demand balance is required to assure normal operation in microgrids. Especially, in stand-alone microgrid operation, load shedding is inevitable to meet the balance. In order to enhance the reliability of stand-alone microgrids, deployment of suitable sized controllable distributed generators is required, which results in an increase of investment cost. Therefore, a tradeoff between economical investment and reliable operation is required. In stand-alone multimicrogrid (MMG) system, the reliability can he improved by cooperative operation. However, solving the tradeoff is still a challenging problem. In this paper, an operation strategy is proposed for MMG systems where each microgrid has different frequency requirement according to load configurations to improve reliability from the economical viewpoint. A hierarchical energy management system is developed to implement the proposed strategy for MMGs operation. The validity of the proposed method is evaluated by using hardware-in-the-loop simulation. Test results showed the effectiveness for reducing load shedding and operation cost of MMG systems.
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