Coordinated voltage control between CVC (Continuous Voltage Control) and DVC (Discrete Voltage Control) to enhance voltage stability in Jeju power system

T. K. Kim, J. H. Shin, J. M. Cho, J. C. Bae, S. Seo, Y. H. Choi, B. Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Many countries have been experienced a voltage collapse. The voltage collapse is mainly cause of imbalance between reactive power supply and demand. To overcome the imbalance in the electric power system, various voltage-var control devices have been used. To manage the devices efficiently, coordinated control those devices has been important. More efficient voltage-var control techniques in a power system have been proposed. To achieve a better control this paper presents a coordinated voltage control system with generators and switched shunt devices. Generators are equipped with automatic voltage regulator to maintain the voltage of generator bus. Switched shunt devices are installed on the network to control the voltage at each bus. Those devices have different characteristic time constant. Generators are much faster than shunt devices. When a disturbance in some power system network occurs, generators are more dominant factor in voltage stability. Power system operators have to control their system to have more reactive power reserve. In this paper a voltage control technique is to reserve reactive power of generators for emergency state in power system network through a coordinate control generators and switch shunt devices. These controls will be called CVC (Continuous Voltage Control) and DVC (Discrete Voltage Control) respectively. However, CVC has a different control scheme with AVRs in generators. It can control the voltage of a key bus in a power system network. The key bus has some characteristic such as reflects the change in all the voltage values of the network, has a sufficient reactive power reserve. In addition DVC control the reactive power reserve of generators to have more. Through coordinating two types of controllers the network has more reactive power reserve, could be controlled the voltages. Those coordinated control can make the network more stable with some disturbances. The study is presented by the Jeju power system in KEPCO (Korea Electric Power Corporation).

Original languageEnglish
Title of host publicationCIGRE International Symposium Guilin 2009
Subtitle of host publicationOperation and Development of Power System in the New Context
Publication statusPublished - 2009
EventCIGRE International Symposium Guilin 2009: Operation and Development of Power System in the New Context - Guilin City, Guangxi Province, China
Duration: 2009 Oct 282009 Oct 30

Publication series

NameCIGRE International Symposium Guilin 2009: Operation and Development of Power System in the New Context

Other

OtherCIGRE International Symposium Guilin 2009: Operation and Development of Power System in the New Context
CountryChina
CityGuilin City, Guangxi Province
Period09/10/2809/10/30

Keywords

  • Coordinated control
  • Reactive power control
  • Reactive power reserve
  • The Jeju power system
  • Voltage control

ASJC Scopus subject areas

  • Computer Science (miscellaneous)

Fingerprint Dive into the research topics of 'Coordinated voltage control between CVC (Continuous Voltage Control) and DVC (Discrete Voltage Control) to enhance voltage stability in Jeju power system'. Together they form a unique fingerprint.

  • Cite this

    Kim, T. K., Shin, J. H., Cho, J. M., Bae, J. C., Seo, S., Choi, Y. H., & Lee, B. (2009). Coordinated voltage control between CVC (Continuous Voltage Control) and DVC (Discrete Voltage Control) to enhance voltage stability in Jeju power system. In CIGRE International Symposium Guilin 2009: Operation and Development of Power System in the New Context (CIGRE International Symposium Guilin 2009: Operation and Development of Power System in the New Context).