Optimizing Fuel Efficiency on an Islanded Microgrid under Varying Loads

Joo Won Lee, Emily Craparo, Giovanna Oriti and Arthur Krener
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Joo Won Lee: Department of Operations Research, Naval Postgraduate School, Monterey, CA 93943, USA
Emily Craparo: Department of Operations Research, Naval Postgraduate School, Monterey, CA 93943, USA
Giovanna Oriti: Department of Electrical and Computer Engineering, Naval Postgraduate School, Monterey, CA 93943, USA
Arthur Krener: Department of Applied Mathematics, Naval Postgraduate School, Monterey, CA 93943, USA

Energies, 2022, vol. 15, issue 21, 1-21

Abstract: Past studies of microgrids have been based on measurements of fuel consumption by generators under static loads. There is little information on the fuel efficiency of generators under time-varying loads. To help analyze the impact of time-varying loads on optimal generator operation and fuel consumption, we formulate a mixed-integer linear optimization model to plan generator and energy storage system (ESS) operation to satisfy known demands. Our model includes fuel consumption penalty terms on time-varying loads. We exercise the model on various scenarios and compare the resulting optimal fuel consumption and generator operation profiles. Our results show that the change in fuel efficiency between scenarios with the integration of ESS is minimal regardless of the imposed penalty placed on the generator. However, without the assistance of the ESS, the fuel consumption increases dramatically with the penalty imposed on the generator. The integration of an ESS improves fuel consumption because the ESS allows the generator to minimize power output fluctuation. While the presence of a penalty term has a clear impact on generator operation and fuel consumption, the exact type and weight of the penalty appears insignificant; this may provide useful insight for future studies in developing a real-time controller.

Keywords: microgrid optimization; energy storage system; time-varying loads; fuel efficiency; energy management; generator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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