Conference Publication Details
Mandatory Fields
O'Keeffe, D;Riverso, S;Albiol-Tendillo, L;Lightbody, G
2017 28TH IRISH SIGNALS AND SYSTEMS CONFERENCE (ISSC)
Distributed Hierarchical Droop Control of Boost Converters in DC Microgrids
2017
January
Validated
1
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Optional Fields
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.
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