Research Review and Prospect on New Commutation Technology to Prevent Direct Current Commutation Failure

Commutation failure is an important factor affecting the safe and stable operation of the high voltage direct current (HVDC) multi-in-feed power grid. It is significant to improve the ability to prevent commutation failure in HVDC transmission systems. To mitigate commutation failure and reduce the negative impact of commutation failure in the system, this paper summarizes the research on new DC commutation technology for the prevention of HVDC commutation failure. Based on the physical mechanism of commutation failure, this paper summarizes and presents the commutation technologies from three levels: device characteristics improvement, commutation topology reform, and direct current control system optimization, and comprehensively analyzes the advantages and disadvantages of new commutation technology and other existing prevention technologies. Finally, based on the research review of results of commutation failure in recent years, the research and development of commutation technology in the future is pointed out to overcome the key technical problem affecting the safe and reliable operation of HVDC engineering projects.