Control of cascaded DC-DC converter based hybrid battery energy storage systems - Part II:Lyapunov approach


A cascaded DC-DC boost converter is one of the ways to integrate hybrid battery types within a grid-tie inverter. Due to the presence of different battery parameters within the system such as, state-of-charge and/or capacity, a module based distributed power sharing strategy may be used. To implement this sharing strategy, the desired control reference for each module voltage/current control loop needs to be dynamically varied according to these battery parameters. This can cause stability problem within the cascaded converters due to relative battery parameter variations when using the conventional PI control approach. This paper proposes a new control method based on Lyapunov Functions to eliminate this issue. The proposed solution provides a global asymptotic stability at a module level avoiding any instability issue due to parameter variations. A detailed analysis and design of the nonlinear control structure are presented under the distributed sharing control. At last thorough experimental investigations are shown to prove the effectiveness of the proposed control under grid-tie conditions.

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Divisions: College of Engineering & Physical Sciences > Power Electronics, Machines and Power System (PEMPS)
Additional Information: © 2015 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.” Funding: EPSRC (EP/1008764/1 and EP/13764)
Uncontrolled Keywords: Electrical and Electronic Engineering,Control and Systems Engineering,Computer Science Applications
Publication ISSN: 1557-9948
Last Modified: 17 Jun 2024 07:19
Date Deposited: 02 Mar 2016 13:55
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-05
Published Online Date: 2015-12-22
Accepted Date: 2015-11-20
Submitted Date: 2015-01-20
Authors: Mukherjee, Nilanjan
Strickland, Danielle (ORCID Profile 0000-0002-2979-4479)



Version: Published Version

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