Determination of reactive power compensation considering largedisturbances for power flow solvability in the Korean power system

Sangsoo Seo, Sang Gyun Kang, Byongjun Lee, Tae Kyun Kim, Hwachang Song

Research output: Contribution to journalArticle

4 Citations (Scopus)


This paper proposes a methodology using a tool based on the branch-parameter continuation power flow (BCPF) in order to restore the power flow solvability in unsolvable contingencies. A specified contingency from a set of transmission line contingencies is modeled, considering the transient analysis and practice in the Korean power system. This tool traces a solution path that satisfies the power flow equations with respect to the variation of the branch parameter. At a critical point, in which the branch parameter can move on to a maximum value, a sensitivity analysis with a normal vector is performed to identify the most effective compensation. With the sensitivity information, the location of the reactive power compensation is determined and the effectiveness of the sensitivity information is verified to restore the solvability. In the simulation, the proposed framework is then applied to the Korean power system.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalJournal of Electrical Engineering and Technology
Issue number2
Publication statusPublished - 2011 Mar 1



  • Korean power systems
  • Power flow solvability
  • Reactive power compensation
  • Sensitivity analysis
  • Transient analysis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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