Research on Characteristics of Thyristors Applied to On-L oad Tap-Changer

At present, the automatic shutdown characteristic of the thyristor current zero-crossing point in the power electronic switch is mainly used to block the arc that may occur during the operation of the hybrid on-load tap-changer. The hybrid on-load tap-changer is an important part of the transformer, so studying the characteristics of the thyristor will help to increase the service life of the transformer. In this paper, the transient process of the floating potential and current and voltage of the gate-level contacts of the thyristor during the opening and closing process is studied. The thyristor selection of the on-load tap-changer provides a reference, which aims to improve the comprehensive performance and practicality of the on-load tap-changer.