Optimization of the capacities of private generators installed in a hospital building under the constraint of demand sufficiency during power outages

Akane Uemichi, Naoki Kaito, Yudai Yamasaki, Shigehiko Kaneko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


It is essential to secure energy sources by installing a private power generator for business continuity in a power outage. The authors have developed an optimization tool to estimate the optimal amount of distributed power supply equipment using economic efficiency and resilience as two evaluation indicators. However, it is questionable whether the private generator in a hospital building can generate sufficient electricity to meet demands in case of a power failure, because demand has short cycle fluctuations on the order of seconds, and the private generator must respond to these fluctuations from time to time in the case of stand-Alone operation. The optimization tools we have developed in the past have not considered the balance between power output and load demand (demand sufficiency). Therefore, this paper proposes a new optimization method that considers balancing power supply and demand in private generators' independent operation during power outages. We narrowed the optimization constraints as demand sufficiency conditions: standard AC frequency range between 49 and 51 Hz. More practical optimal solutions are obtained by applying the new constraints to the multi-optimization. We also compare the case study results by applying these constraints to the results of previous case studies.

Original languageEnglish
Title of host publicationProceedings of the ASME 2021 Power Conference, POWER 2021
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791885109
Publication statusPublished - 2021
EventASME 2021 Power Conference, POWER 2021 - Virtual, Online
Duration: 2021 Jul 202021 Jul 22

Publication series

NameAmerican Society of Mechanical Engineers, Power Division (Publication) POWER


ConferenceASME 2021 Power Conference, POWER 2021
CityVirtual, Online


  • Demand sufficiency
  • Electric system simulator
  • Energy-resilience
  • Hospital building
  • Multioptimization

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology


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