R.Mahalakshmi  , K.S.R. Anjaneyalu  , 
    Reactive Power Control Using Thyristor Controlled Tap Changer System,
    International Journal of Electrical and Power Engineering,
    Volume 1,Issue 2,
    2007,
    Pages 246-250,
    ISSN 1990-7958,
    ijepe.2007.246.250,
    (https://makhillpublications.co/view-article.php?doi=ijepe.2007.246.250)
    Abstract: If the reactive power of the load is changing rapidly, then a suitable fast response compensator is needed. SVC and TCPAR (Thyristor Control Phase Angle Reactor) are two such compensators belonging to FACTS family. A model for the Thyristor tap changer has been designed to improve the voltage level at the load end and also a smooth reactive power control is achieved by controlling the firing angle, when a R.L load is present.
    Keywords: Reactive power;thyristor controlled tap changer