YAO Fang, WANG Liuliu, TANG Shengxue, et al. Online Identification Method for VIENNA Rectifier Single Switch Open-fault Based on Transient Current Angle Information[J]. 2021, 47(1): 111-117.
YAO Fang, WANG Liuliu, TANG Shengxue, et al. Online Identification Method for VIENNA Rectifier Single Switch Open-fault Based on Transient Current Angle Information[J]. 2021, 47(1): 111-117.DOI:
To improve the identification speed of single switch open-fault of VIENNA rectifier
through analyzing the characteristics of current in the VIENNA rectifier of single switch open-fault
an identification method based on the angle of current without additional hardware circuits is proposed. By using the angle of input currents and the instantaneous value of non-fault phase currents to locate fault-phase and fault-switch
the method realizes online identification of single switch open-fault in the VIENNA rectifier. Meanwhile
the VIENNA rectifier has strong resistance to load fluctuation and shortens the time of locating fault-switch the same as the time of locating fault-phase. The experimental results show that it can identify the single switch open-fault of VIENNA rectifier on line in 10%~70% power frequency cycle
which guarantees the safe operation and subsequent maintenance of the rectifier.