Ship energy management for hybrid propulsion and power supply with shore charging

M. Kalikatzarakis, R. D. Geertsma, E. J. Boonen, K. Visser, R. R. Negenborn

Research output: Contribution to journalArticleScientificpeer-review

42 Citations (Scopus)

Abstract

Hybrid technology in marine vehicles can significantly reduce fuel consumption and local CO2 emissions. It has been applied successfully to several ship-types, mostly with conventional, rule-based, strategies. To further improve performance, intelligent control strategies are necessary. This work, inspired by automotive research in Energy Management Strategies, applies the Equivalent Consumption Minimisation Strategy (ECMS) to a ship powered by a hybrid propulsion plant with hybrid power supply that can be recharged with renewable shore power. This hybrid configuration has the additional challenge to determine the optimal power-split between three or more different power sources, in real-time, and to optimally deplete the battery packs over the mission profile. To this end, a Mixed-Integer Non-Linear optimisation Problem is formulated and solved by combining Branch & Bound and Convex optimisation. Dynamic Programming (DP) is used to benchmark the real-time strategies, which are also compared to the current rule-based (RB) controller. Simulation results of a case study tugboat with validated models show that, with unknown load demand, 6% additional fuel savings can be achieved with ECMS.

Original languageEnglish
Pages (from-to)133-154
JournalControl Engineering Practice
Volume76
DOIs
Publication statusPublished - 2018

Keywords

  • Energy management systems
  • Energy storage
  • Hybrid vehicles
  • Marine systems
  • Propulsion control
  • Ship control

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