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Control and power sharing in hybrid AC/DC microgrids using a nonlinear backstepping approach
conference contribution
posted on 2018-11-29, 00:00 authored by Tushar Kanti Roy, Apel MahmudApel Mahmud, Shama IslamShama Islam, K M Muttaqi, Enamul HaqueEnamul Haque, Aman Maung Than OoAman Maung Than OoThis paper presents a backstepping approach to design controllers for different components in hybrid AC/DC microgrids. The DC-side of the proposed microgrid structure includes a solar photovoltaic (PV) unit with a DC-DC boost converter, a permanent magnet synchronous generator (PMSG)-based wind generator with a rectifier, a battery energy storage system (BESS) with a bidirectional DC-DC converter, and DC loads. The AC part incorporates a synchronous generator along with AC loads while a bidirectional voltage source converter (VSC) is used between the DC and AC buses for transferring power from one side to another. The detailed dynamical models of all these components (except loads) are used to design the controllers using the proposed nonlinear backstepping approach. The controllers are designed in a decentralized way where the main objectives are to ensure appropriate power sharing while maintaining desired voltages at the common buses on both sides. The stability of the hybrid AC/DC microgrid is theoretically analyzed through control Lyapunov functions using the controllers obtained from the proposed control scheme. Simulation studies are carried out to demonstrate the performance of the proposed scheme under different operating scenarios as compared to a nonlinear sliding mode control scheme.
History
Event
IEEE Industry Applications Society. Meeting (2018 : Portland, Oregon)Pagination
1 - 8Publisher
IEEELocation
Portland, OregonPlace of publication
Piscataway, N.JPublisher DOI
Start date
2018-09-23End date
2018-09-27ISBN-13
9781538645369Language
engPublication classification
E Conference publication; E1 Full written paper - refereedTitle of proceedings
IAS 2018 : Proceedings of the 2018 IEEE Industry Applications Society Annual MeetingUsage metrics
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