Electro-thermal analysis of power converter components in low-voltage DC microgrids for optimal protection system design

Sztykiel, Michal and Fletcher, Steven and Norman, Patrick and Galloway, Stuart and Burt, Graeme (2017) Electro-thermal analysis of power converter components in low-voltage DC microgrids for optimal protection system design. IEEE Transactions on Smart Grid. ISSN 1949-3053 (https://doi.org/10.1109/TSG.2017.2697686)

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Abstract

Bidirectional power converters are considered to be key elements in interfacing the low voltage dc microgrid with an ac grid. However to date there has been no clear procedure to determine the maximum permissible fault isolation periods of the power converter components against the dc faults. To tackle this problem, this paper presents an electro-thermal analysis of the main elements of a converter: ac inductors, dc capacitors and semiconductors. In doing this, the paper provides a methodology for quantifying fault protection requirements for power converter components in future dc microgrids. The analysis is performed through simulations during normal and fault conditions of a low voltage dc microgrid. The paper develops dynamic electro-thermal models of components based on the design and detailed specification from manufacturer datasheets. The simulations show the impact of different protection system operating speeds on the required converter rating for the studied conditions. This is then translated into actual cost of converter equipment. In this manner, the results can be used to determine the required fault protection operating requirements, coordinated with cost penalties for uprating the converter components.

ORCID iDs

Sztykiel, Michal ORCID: https://orcid.org/0000-0002-0210-313X

Fletcher, Steven ORCID: https://orcid.org/0000-0002-3510-9271

Norman, Patrick ORCID: https://orcid.org/0000-0001-5577-1281

Galloway, Stuart ORCID: https://orcid.org/0000-0003-1978-993X

Burt, Graeme ORCID: https://orcid.org/0000-0002-0315-5919

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• Item metadata

  Item type:	Article
  ID code:	60681
  Dates:	Date Event 24 April 2017 Published 24 April 2017 Published Online 9 April 2017 Accepted
  Notes:	(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.
  Subjects:	Technology > Electrical engineering. Electronics Nuclear engineering
  Department:	Faculty of Engineering > Electronic and Electrical Engineering Strategic Research Themes > Energy Strategic Research Themes > Measurement Science and Enabling Technologies
  Depositing user:	Pure Administrator
  Date deposited:	17 May 2017 08:53
  Last modified:	11 Nov 2024 11:42
  URI:	https://strathprints.strath.ac.uk/id/eprint/60681