Mechanism and Mitigation of Commutation Failure in Hybrid Cascaded HVDC System Caused by Sending End AC Fault 
BIAN Jing, YANG Xiaoxi, WANG Yao, GUO Jiazhi, WANG Hexin
Journal of Northeast Electric Power University . 2026, (1): 17 -28 .  DOI: 10.19718/i.issn.1005-2992.2026-01-0017-12