Li Xiao-ming  , Yin Xiang-gen  , Wang Wan-qing  , Zhang Shui-chang  , 
    A Novel Model of Arcless On-Load Tap-Changing Transformer and Its Simulation,
    Asian Journal of Information Technology,
    Volume 5,Issue 2,
    2006,
    Pages 164-168,
    ISSN 1682-3915,
    ajit.2006.164.168,
    (https://makhillpublications.co/view-article.php?doi=ajit.2006.164.168)
    Abstract: In this study, a novel arcless on-load tap-changing model is proposed, it adopts inverse  paralleled high-power thyristor pair to be control switch and regulate the output voltage by switching in corresponding tap-changing windings and also use thyristor’s zero-current cut-off character to cancel transition resistance inserting process to simplify the regulation steps effectively. A 35kV/10.5kV£¬5000kVA two–winding transformer model is built by MATLAB and the simulation wave form of tap-changing process has proved that this model is correct.
    Keywords: On-Load Tap-Changing;thyristor switch;transition resistor;simulation