A novel ride-through system for adjustable speed drives using common-mode voltage

This paper proposes a novel ride-through system for adjustable-speed drives (ASDs) using common-mode voltage. In the proposed ride-through system, the common-mode voltage inherent in PWM converter-inverter systems is used for charging the energy storage device at normal conditions of source power. That is, charging current can be regulated by the control of common-mode voltage with a small reactor while driving motors. At the whole range of voltage disturbance, from balanced or unbalanced shallow voltage sag to outage, ride-through is successively available with proposed system. Various energy storage devices can be selected according to the applications and two kinds of the charging topology-using inverter side or converter side common-mode voltage-are also available in the proposed system.

[1]  Seung-Ki Sul,et al.  Minimum-loss strategy for three-phase PWM rectifier , 1999, IEEE Trans. Ind. Electron..

[2]  R. Spee,et al.  Voltage sag ride-through for adjustable speed drives with active rectifiers , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[3]  Seung-Ki Sul,et al.  Common mode voltage reduction method modifying the distribution of zero voltage vector in PWM converter/inverter system , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[4]  A. von Jouanne,et al.  Assessment of ride-through alternatives for adjustable speed drives , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[5]  C. J. Melhorn,et al.  An evaluation of energy storage techniques for improving ride-through capability for sensitive customers on underground networks , 1996, Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference.