Distributed hierarchical droop control of boost converters in DC microgrids

Thumbnail Image
4886.pdf(10.56 MB)
Accepted version
O'Keefe, Daniel
Riverso, Stefano
Albiol-Tendillo, Laura
Lightbody, Gordon
Journal Title
Journal ISSN
Volume Title
Institute of Electrical and Electronics Engineers (IEEE)
Research Projects
Organizational Units
Journal Issue
Voltage stability and accurate current-sharing are primary features of an efficiently operating power distribution network, such as a dc islanded-microgrid. This paper presents the development of a distributed hierarchical droop control architecture for dc-dc boost converters within a dc islanded-microgrid. Decentralised controllers are conventionally designed for local voltage and current control without accounting for coupling to other converters. However, due to the non-minimum phase action of boost converters, global knowledge of coupling is required to inform stable local controller tuning over a range of load disturbances. Consensus-based distributed secondary controllers, utilising low-bandwidth communications, are designed to coordinate voltage levels and improve current-sharing accuracy. The control architecture is tested in response to communication faults, non-linear loads, and plug-and-play operations.
Low-voltage dc microgrids , Distributed control , Voltage stability , Current-sharing , Consensus algorithms , Voltage control , Couplings , Microgrids , Power system stability , Steady-state , Bandwidth , Two dimensional displays , DC-DC power convertors , Decentralised control , Distributed control , Distributed power generation , Distribution networks , Electric current control , Voltage control , Distributed hierarchical droop control , DC microgrids , Power distribution network , dc-dc boost converters , Decentralised controllers , Current control
O'Keeffe, D., Riverso, S., Albiol-Tendillo, L. and Lightbody, G. (2017) 'Distributed hierarchical droop control of boost converters in DC microgrids', 28th Irish Signals and Systems Conference (ISSC), Killarney, Ireland, 20-21 June 2017, 1-6. doi:10.1109/ISSC.2017.7983615
Link to publisher’s version
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.