Improved Controller Design for a Microgrid Fuel-Cell Based Energy Storage System

Ganeshan, A, Holmes, G, Meegahapola, L and McGrath, B 2018, 'Improved Controller Design for a Microgrid Fuel-Cell Based Energy Storage System', in Proceedings of the 2018 IEEE 27th International Symposium on Industrial Electronics (ISIE 2018), Cairns, Australia, 13-15 June 2018, pp. 521-526.


Document type: Conference Paper
Collection: Conference Papers

Title Improved Controller Design for a Microgrid Fuel-Cell Based Energy Storage System
Author(s) Ganeshan, A
Holmes, G
Meegahapola, L
McGrath, B
Year 2018
Conference name ISIE 2018
Conference location Cairns, Australia
Conference dates 13-15 June 2018
Proceedings title Proceedings of the 2018 IEEE 27th International Symposium on Industrial Electronics (ISIE 2018)
Publisher IEEE
Place of publication Inited States
Start page 521
End page 526
Total pages 6
Abstract Energy storage systems are one of the essential components of a renewable energy based microgrid. However, for a fuel-cell based energy storage systems, the constraints imposed by the internal dynamics of a fuel-cell must be taken into account by its power interface converter system. In particular, a fuel-cell requires a constrained rate-of-change-of-current because of its slow dynamic capability. This introduces a slew rate nonlinearity between the primary and secondary feedback loops within a conventional cascaded control system, which can adversely impact the transient performance of a classical proportional integral (PI) controller. Hence such a controller cannot ensure safe operating conditions for a fuel cell, and may in fact damage it. This paper now investigates the design of an improved current regulated compensator for a fuel-cell energy storage system that takes the slew rate non linearity into account during microgrid load transients, while avoiding the need for more complex variable gain control system architectures. The resulting cascade control system for the fuel-cell dc-dc converter is implemented in the discrete time domain.
Subjects Power and Energy Systems Engineering (excl. Renewable Power)
Keyword(s) Anti-windup
hydrogen energy storage system
microgrid
slew rate limiter
type- II PI controller
DOI - identifier 10.1109/ISIE.2018.8433791
Copyright notice © 2018 IEEE
ISBN 9781538637050
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