Comparison of non-communication based DC load shedding schemes

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Abstract

Whenever the total power that can be provided by the distributed energy resources (DERs) is less than the total power demand of the loads, the DC bus voltages start to fall which could lead to power collapse. This paper investigates and compares the performances of the existing non-communication based (decentralized) load shedding schemes in a direct current (DC) microgrid to protect the integrity of the microgrid under a large disturbance. The simulation is carried out in a Matlab environment with various forms of load and distributed energy resources on an IEEE 37 AC Node converted to DC. The findings show that the conventional load shedding scheme could expose critical loads to substantial and lengthy voltage sags. Voltage sags and over-shedding of load could be resolved using combined load shedding scheme. The adaptive schemes minimise the duration and magnitude of voltage drop by utilizing the rate of change of voltage (ROCOV) to achieve a more reliable assessment of the microgrid operating conditions and determine the appropriate load shedding voltage thresholds and time delays. All the schemes could not achieve an optimal load shedding, this work therefore leads to the need for more advanced load shedding schemes that can shed load optimally for future DC microgrids.

Original languageEnglish
Title of host publication2022 57th International Universities Power Engineering Conference (UPEC)
Subtitle of host publicationBig Data and Smart Grids, UPEC 2022 - Proceedings
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages6
ISBN (Electronic)9781665455053
ISBN (Print)9781665455053
DOIs
Publication statusPublished - 18 Oct 2022
Event57th International Universities Power Engineering Conference, 2022: Big Data and Smart Grids - Istanbul Technical University and Kadir Has University, Istanbul, Turkey
Duration: 30 Aug 20222 Sept 2022
Conference number: 57
https://upec2022.khas.edu.tr/

Publication series

Name2022 57th International Universities Power Engineering Conference: Big Data and Smart Grids, UPEC 2022 - Proceedings

Conference

Conference57th International Universities Power Engineering Conference, 2022
Abbreviated titleUPEC
Country/TerritoryTurkey
CityIstanbul
Period30/08/222/09/22
Internet address

Keywords

  • DC microgrid
  • distributed energy resources
  • DC load shedding

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