Title

Thyristor controlled susceptances for balancing compensators operated under nonsinusoidal conditions

Document Type

Article

Publication Date

7-1-1994

Abstract

The RMS value of the unbalanced and reactive currents in three-phase unbalanced systems can be reduced with a balancing compensator that has an adaptive property. Circuits that provide a controllable susceptance are the main components of these compensators. They can be built of thyristor switched inductors and reactive elements. The susceptance of such circuits is referred to as 'thyristor controlled susceptance' (TCS) in the paper. The harmonic currents generated by switched thyristors and injected into the supply cause a waveform distortion, however. They have to be often operated, moreover, at distorted supply voltage, and a resonance with the system inductance may occur for harmonic frequencies. As a consequence, the load balancing and power factor improvement are obtained at the expense of an increase in waveform distortion. This distortion can be reduced if the structure of the circuit that provide the TCS is properly selected. In this paper, various circuits that can provide the TCS are analysed and compared with respect to generated harmonic currents and frequency properties.

Publication Source (Journal or Book title)

IEE Proceedings: Electric Power Applications

First Page

177

Last Page

185

This document is currently not available here.

COinS