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MPC and energy storage based frequency regulation strategy for hybrid electric ships

conference contribution
posted on 01.05.2019, 00:00 authored by SDG Jayasinghe, DR Nayanasiri, A Tashakori, Sanath AlahakoonSanath Alahakoon, N Fernando, DM Vilathgamuwa
Propulsion system of a hybrid electric ship is powered by the main engine and a motor coupled to the propeller shaft via a gearbox. The motor provides a power boost when the propulsion load is high and extracts excess power working as a generator at low loading conditions. The power boost comes from the auxiliary engine which is used to supply service loads as well. When excess power is taken out from the shaft it is delivered to the ship power system requiring the auxiliary engine to reduce its power. Consequently, auxiliary engine experiences frequent changes resulting in frequency sags or swells. In extreme conditions these could result in blackouts. In addition, changes in service loads could also lead to frequency deviations causing serious power quality issues. This paper proposes a novel model predictive control (MPC) based strategy to address this issue and thereby improve the power quality. The proposed strategy uses a battery energy storage system to absorb load changes and regulate the frequency of the ship power system. The same approach is tested with the PI controllers as well for performance comparisons. Simulation results are presented to verify the efficacy of the proposed frequency regulation strategy. © 2018 IEEE.

History

Start Page

929

End Page

936

Number of Pages

8

Start Date

13/06/2018

Finish Date

15/06/2018

eISSN

2163-5145

ISBN-13

9781538637050

Location

Cairns, Qld, Australia

Publisher

IEEE

Place of Publication

Piscataway, NJ

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

RMIT University; Queensland University of Technology; University of Tasmania; University of Moratuwa, Sri Lanka; TGTECH, Melbourne, Australia

Era Eligible

Yes

Name of Conference

27th IEEE International Symposium on Industrial Electronics (ISIE 2018)