Continuous regulation of capacitive reactive power

George G. Karady

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A novel method for the continuous regulation of reactive power generated by a capacitor bank is presented. The two proposed control circuits consist of capacitor banks controlled by bidirectional switches which are built with antiparallel connected thyristor and GTO (gate turn-off thyristor) valves, or with two GTO valves. The current of the capacitor is regulated by turning off the GTO switch before zero current crossing. By tuning off the current, charge is trapped in the capacitor, resulting in a constant capacitor voltage. To avoid the current surge, the switch is turned on when the supply and capacitor voltage are equal. The current regulation is achieved by switching off the current for a part of each cycle. The feasibility of the method has been verified by extensive transient analysis. The advantage of the proposed system is the fast and continuous regulation of reactive power without inductance. The system can be built with commercially available components and used for voltage support, power factor correction, etc.

Original languageEnglish (US)
Pages (from-to)1466-1473
Number of pages8
JournalIEEE Transactions on Power Delivery
Volume7
Issue number3
DOIs
StatePublished - Jul 1992

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Reactive power
Capacitors
Thyristors
Switches
Electric potential
Transient analysis
Inductance
Tuning
Networks (circuits)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Continuous regulation of capacitive reactive power. / Karady, George G.

In: IEEE Transactions on Power Delivery, Vol. 7, No. 3, 07.1992, p. 1466-1473.

Research output: Contribution to journalArticle

Karady, George G. / Continuous regulation of capacitive reactive power. In: IEEE Transactions on Power Delivery. 1992 ; Vol. 7, No. 3. pp. 1466-1473.
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