Decentralised control of DC microgrid based on virtual admittance to enhance DC voltage and grid frequency support

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

DC microgrid technology has become one of key smart grid research topics in recent years. In comparison to AC microgrids, DC microgrids are more manageable to operate in grid-connected and islanded modes, and also offering improved efficiency and better controllability. Services, such as voltages and AC system frequency support can also be potentially provided by optimally controlling the DC microgrids converter interfaces and their local distributed energy resources. These will require a good understanding of the dynamic interactions between the DC microgrid and the host AC system, and implementation of the appropriate control strategies. This paper investigates the dynamic resilience of a DC microgrid connected to an AC system under different frequency and voltage disturbances. A decentralised droop control strategy within the DC microgrid is used for fast active power control and wider system frequency support. A virtual admittance method is also utilised to enhance the local DC microgrid voltages during the AC frequency events and DC fault test scenarios. The effectiveness of the control strategy is evaluated by simulation studies in MATLAB/Simulink.
Original languageEnglish
Title of host publication2018 53rd International Universities Power Engineering Conference (UPEC)
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages6
ISBN (Electronic)9781538629109
DOIs
Publication statusPublished - 13 Dec 2018
EventThe 53rd International Universities Power Engineering Conference - Glasgow Caledonian University, Glasgow , United Kingdom
Duration: 4 Sep 20187 Sep 2018
Conference number: 53
http://www.upec2018.com/

Conference

ConferenceThe 53rd International Universities Power Engineering Conference
Abbreviated titleUPEC2018
CountryUnited Kingdom
CityGlasgow
Period4/09/187/09/18
Internet address

Keywords

  • DC microgrids
  • grid frequency support
  • DC voltage enhancement
  • decentralised control strategy

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