Hybrid control system for managing voltage and reactive power in the JEJU power system

Sangsoo Seo, Yun Hyuk Choi, Sang Gyun Kang, Byongjun Lee, Jeong Hoon Shin, Tae Kyun Kim

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


This paper proposes a hybrid voltage controller based on a hierarchical control structure for implementation in the Jeju power system. The hybrid voltage controller utilizes the coordination of various reactive power devices such as generators, switched shunt devices and LTC to regulate the pilot voltage of an area or zone. The reactive power source can be classified into two groups based on action characteristics, namely continuous and discrete. The controller, which regulates the pilot bus voltage, reflects these characteristics in the coordination of the two types of reactive power source. However, the continuous type source like generators is a more important source than the discrete type for an emergency state such as a voltage collapse, thereby requiring a more reactive power reserve of the continuous type to be utilized in the coordination in order to regulate the pilot bus voltage. Results show that the hybrid controller, when compared to conventional methods, has a considerable improvement in performance when adopted to control the pilot bus voltage of the Jeju island system.

Original languageEnglish
Pages (from-to)429-437
Number of pages9
JournalJournal of Electrical Engineering and Technology
Issue number4
Publication statusPublished - 2009 Dec


  • Cost function
  • Hierarchical control, optimal control
  • Hybrid control
  • Pilot bus
  • Sensitivity matrix
  • Voltage/reactive power control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Hybrid control system for managing voltage and reactive power in the JEJU power system'. Together they form a unique fingerprint.

Cite this