The Role of Thyristor Controlled Inductors in Static VAR Controls

Abstract

This paper compares the performance of thyristor controlled inductors (TCI), bank of capacitors and synchronous compensators in static VAR controls. Based on the analysis, thyristor controlled inductors offer a better and more efficient scheme so long as the firing angle of the
thyristors are maintained above 11/2. The flexibility in control as well as the switching speed of the thyristor is harnessed here. In conclusion, a practically implementable schematic arrangement of the optimal TCI is also shown.