An Analytical Method for Calculating Critical Voltage Sag Clearance Time of Induction Motors

This letter presents an analytical method to determine the maximum symmetrical voltage sag ridethrough time for induction motors. The proposed method is based on the observation that in order to make a motor viable after voltage sag, the motor's electromagnetic torque should be greater than the mechanical torque when the motor terminal voltage is recovered.

[1]  W. Freitas,et al.  An Analytical Method for Analysis of Large-Disturbance Stability of Induction Generators , 2007, IEEE Transactions on Power Systems.

[2]  A. Gomez,et al.  A study of voltage sags in electric motors , 2007, 2007 9th International Conference on Electrical Power Quality and Utilisation.

[3]  Deepak Divan,et al.  Dynamic sag correctors: cost effective industrial power line conditioning , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[4]  G. Yalynkaya.  Characterization of Voltage Sags in Industrial Distribution Systems , 1997 .

[5]  M.A. Pai,et al.  Voltage stability of electric power systems [Book Review] , 1998, IEEE Power Engineering Review.

[6]  P.A. Crossley,et al.  Characterization of voltage sags in industrial distribution systems , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.