Centralized control algorithm for power system performance using FACTS devices in the Korean power system

Sang Gyun Kang, Sangsoo Seo, Byongjun Lee, Byunghoon Chang, Rohae Myung

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper presents a centralized control algorithm for power system performance in the Korean power system using Flexible AC Transmission Systems (FACTS) devices. The algorithm is applied to the Korean power system throughout the metropolitan area in order to alleviate inherent stability problems, especially concerns with voltage stability. Generally, control strategies are divided into local and centralized control. This paper is concerned with a centralized control strategy in terms of the global system. In this research, input data of the proposed algorithm and network data are obtained from the SCADA/EMS system. Using the full system model, the centralized controller monitors the system condition and decides the operating point according to the control objectives that are, in turn, dependent on system conditions. To overcome voltage collapse problems, load-shedding is currently applied in the Korean power system. In this study, the application of the coordination between FACTS and switch capacitor (SC) can restore the solvability without load shedding or guarantee the FV margin when the margin is insufficient. Optimal Power Flow (OPF) algorithm, for which the objective function is loss minimization, is used in a stable case. The results illustrate examples of the proposed algorithm using SCADA/EMS data of the Korean power system in 2007.

Original languageEnglish
Pages (from-to)353-362
Number of pages10
JournalJournal of Electrical Engineering and Technology
Issue number3
Publication statusPublished - 2010 Sept 1


  • CPF (Continuation Power Flow)
  • Coordinated control
  • Korean power systems
  • Optimal power flow
  • Voltage stability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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