Development and research of high-voltage 24-pulse autotransformer-rectifier unit Lyubov Roginskaya, Anton Gorbunov, Ruslan Karimov, Ayaz Bakirov, Oleg Shiryaev and Violetta Yanuzakova E3S Web Conf., 623 (2025) 03007 Published online: 08 April 2025 DOI: 10.1051/e3sconf/202562303007