Review of under-voltage load shedding schemes in power system operation

Renuga Verayiah, Azah Mohamed, Hussain Shareef, Izham Zainal Abidin

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


A voltage collapse event is complex and localized in nature, but its effect is extensive. A vital effect of voltage collapse is total system collapse or blackouts, which will result in a significant loss to utility companies. Online monitoring of power system stability has thus become an important factor for electric power utilities. The final resort prevent the occurrence of a voltage collapse incident is the implementation of an undervoltage load shedding (UVLS) scheme. This paper focuses on the introduction of the UVLS scheme and presents an overview of the principles of the UVLS that are crucial to the design of such a protection scheme. This paper also presents the existing industrial practices and other research methods available to date.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalPrzeglad Elektrotechniczny
Issue number7
Publication statusPublished - 2014
Externally publishedYes


  • Under voltage load shedding
  • Voltage collapse
  • Voltage stability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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