Study on switching principle of thyristor assisted arc extinguishing hybrid OLTCYu Yin, Fei Gao, Fei Shi, Peng-Fei Jia, Ben-Ping Ding, Lu-Ning Hao, Lei Zhang and Chao LiuE3S Web Conf., 243 (2021) 01001DOI: https://doi.org/10.1051/e3sconf/202124301001