Comparative study of effectiveness of different var compensation devices in large-scale power networks

Reza Sirjani, Azah Mohamed, Hussain Shareef

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


A comparison of the effectiveness of installing reactive power compensators, such as shunt capacitors, static var compensators (SVCs), and static synchronous compensators (STATCOMs), was presented in large-scale power networks. A suitable bus was first identified using modal analysis method. The single shunt capacitor, single SVC, and single STATCOM were installed separately on the most critical bus. The effects of the installation of different devices on power loss reduction, voltage profile improvement, and voltage stability margin enhancement were examined and compared for 57- and 118-bus transmission systems. The comparative study results show that SVC, and STATCOM are expensive compared to shunt capacitor, yet the effect of installing STATCOM is better than SVC and the effect of installing SVC is better than that of shunt capacitor in achieving power loss reduction, voltage profile improvement and voltage stability margin enhancement.

Original languageEnglish
Pages (from-to)715-723
Number of pages9
JournalJournal of Central South University
Issue number3
Publication statusPublished - Mar 2013
Externally publishedYes


  • power loss
  • shunt capacitor
  • static synchronous compensator
  • static var compensator
  • voltage profile
  • voltage stability

ASJC Scopus subject areas

  • General Engineering
  • Metals and Alloys


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