Abstract
Commutation failure can lead to DC power fluctuation or even DC pole blocking, threatening the safety and stability of power system. As an abnormal operation state, open-phase operation of inverter side AC subsystem (OPOISAS) occurs at times and affects commutation process. In this paper, the influence of OPOISAS on commutation process is analyzed first. And the analysis shows that the larger the negative-sequence voltage amplitude (NSVA) of the commutation bus is, the greater the risk of commutation failure will be. To deal with the risk of commutation failure, the formula of the negative-sequence voltage of commutation bus during OPOISAS is deduced. Based on the formula, the law of NSVA variation with different factors is analyzed. Meanwhile, several countermeasures are given from the perspective of system planning and operation to reduce the risk of commutation failure during OPOISAS. Simulation results demonstrate that the analysis is correct and the countermeasures are effective.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Electrical Power & Energy Systems
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
