Continuously Regulated Series Capacitor

George G. Karady, Thomas H. Ortmeyer, Bruce R. Pilvelait, Dominic Maratukulam

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


This paper presents a new method for the continuous regulation of series compensation. The two proposed control circuits consist of capacitor banks inserted in a transmission line and are controlled by bi-directional GTO switches. The level of compensation is controlled by varying the on and off time of the GTO switch. To avoid current surge, the switch is turned on before the capacitor voltage is zero. The feasibility of this method was verified by transient analysis and through measurements on a small scale model. The advantage of the proposed circuit is the fast and continuous regulation of series compensation. The circuit can be built with available components and can be used, for example, for impedance control, and oscillation reduction.

Original languageEnglish (US)
Pages (from-to)1348-1355
Number of pages8
JournalIEEE Transactions on Power Delivery
Issue number3
StatePublished - Jul 1993


  • Capacitor bank
  • GTO switches
  • Impedance control
  • Series compensation
  • Thyristor

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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