A Review on Topology, Operating and Control Methods of HVDC Transmission System for Offshore Wind FarmsJinke Li, Jingyuan Yin, Yonggao Guan, Zhenquan Wang, Tao Niu, Hongning Zhen, Zhikun Han and Xueying GuoE3S Web Conf., 165 (2020) 06012DOI: https://doi.org/10.1051/e3sconf/202016506012