Paper Info
Title
Voltage Control of DC Islanded Microgrids: Scalable Decentralised L1 Adaptive Controllers.
Abstract
Voltage stability is a critical feature of an efficiently operating power distribution system such as a DC islanded microgrid. Large-scale autonomous power systems can be defined by heterogeneous elements, uncertainty and changing conditions. This paper proposes a novel scalable decentralised control scheme at the primary level of the typical hierarchical control architecture of DC islanded microgrids with arbitrary topology. Local state-feedback $mathcal{L}_1$ adaptive controllers are retrofitted to existing baseline voltage controllers of DC-DC boost converters, which interface distributed generation units with loads. The use of $mathcal{L}_1$ adaptive controllers achieves fast and robust microgrid voltage stability in the presence of dynamic uncertainty and plug-and-play operations. Furthermore, local controller synthesis is modular as it only requires approximate information about the line parameters that couple neighbouring units. The performance of the proposed architecture is evaluated using a heterogeneous DC islanded-microgrid that consists of 6 DC-DC boost converters configured in a radial and meshed topology. The use of $mathcal{L}_1$ adaptive controllers achieves fast and robust microgrid voltage stability in the presence of plug-and-play operations, unknown load and voltage reference changes, and unmodelled dynamics. Finally, sufficient conditions for global stability of the overall system are provided.
Year
Venue
Field
2018
arXiv: Systems and Control
Control theory,Control theory,Voltage,Voltage reference,Electric power system,Converters,Distributed generation,Modular design,Mathematics,Microgrid
DocType
Volume
Citations 
Journal
abs/1801.04508
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Daniel O'Keeffe101.01
Stefano Riverso216717.28
Laura Albiol-Tendillo301.01
Gordon Lightbody422327.57