Modeling DC Motor Drive Systems in Power System Dynamic Studies

Direct current (dc) motor drive systems are extensively used in paper, steel, mining, material handling, and other industrial applications due to the high starting torque and easy speed control over a wide range. They could account for 10%-20% load demand in some industrial facilities and thus have significant impact on the overall system dynamics. However, an adequate dynamic model for this type of loads is not available for power system dynamic studies. In this paper, a comprehensive modeling method for dc motor drive systems is proposed considering two scenarios: 1) The drive will trip when subjected to severe voltage sags, and 2) the drive can ride through when experiencing mild voltage sags. The dc drive trip curve and a simple procedure to determine if the drive needs to be included for dynamic studies are proposed for Scenario 1. The dynamic model for dc motor drive systems, which can be readily inserted in the simulation software, is developed and verified through case studies for Scenario 2.

[1]  Sasa Z. Djokic,et al.  The influence of overcurrent and undervoltage protection settings on ASD sensitivity to voltage sags and short interruptions , 2008 .

[2]  C. W. Taylor,et al.  Standard load models for power flow and dynamic performance simulation , 1995 .

[3]  Babu Narayanan,et al.  Power system stability and control , 2007 .

[4]  F. Blaabjerg,et al.  Grid voltage sags effects on frequency converter drives an. , 2005, IEEE Compatibility in Power Electronics, 2005..

[5]  W. Rosehart,et al.  Engineering considerations when replacing an old DC drive system , 2002, IEEE Power Engineering Society Summer Meeting,.

[6]  Jovica V. Milanovic,et al.  Development of a dynamic power system load model , 2001 .

[7]  J. Lamoree,et al.  Voltage sag analysis case studies , 1993, Conference Record Industrial and Commercial Power Systems Technical Conference 1993.

[8]  N. S. Tunaboylu,et al.  Ride-through issues for DC motor drives during voltage sags , 1995, Proceedings IEEE Southeastcon '95. Visualize the Future.

[9]  C. W. Taylor,et al.  Load representation for dynamic performance analysis , 1993 .

[10]  D. C. Lee,et al.  Dynamic Load Models Derived from Date Acquired During System Transients , 1982, IEEE Transactions on Power Apparatus and Systems.

[11]  P. C. Sen,et al.  Thyristor DC drives , 1981 .

[12]  J. Sun,et al.  Averaged modelling of switching power converters: reformulation and theoretical basis , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[13]  T. G. Martinich,et al.  Mitigation of resonance using digital models and direct measurement of harmonic impedances , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[14]  Wilsun Xu,et al.  Modeling variable frequency drive and motor systems in power systems dynamic studies , 2013, 2013 IEEE Industry Applications Society Annual Meeting.

[15]  Shengqiang Li.  Load Modeling Techniques for Power System Dynamic Studies , 2013 .

[16]  Ghazanfar Shahgholian,et al.  State space modeling and eigenvalue analysis of the permanent magnet DC motor drive system , 2010, 2010 2nd International Conference on Electronic Computer Technology.

[17]  Antonio T. Alexandridis,et al.  Optimal nonlinear firing angle control of converter-fed DC drive systems , 1998 .

[18]  Kinattingal Sundareswaran,et al.  Genetic tuning of PI controller for speed control of DC motor drive , 2000, Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482).

[19]  J.V. Milanovic,et al.  Sensitivity of AC adjustable speed drives to voltage sags and short interruptions , 2005, IEEE Transactions on Power Delivery.

[20]  Xiang Chen,et al.  Discrete time robust load disturbance torque estimator for a DC motor drive system , 2012, 2012 IEEE International Conference on Control Applications.

[21]  L. Gerbaud,et al.  A new automatic average modelling tool for power electronics systems , 2008, 2008 IEEE Power Electronics Specialists Conference.

[22]  Wilsun Xu,et al.  Modelling of DC drives for power system harmonic analysis , 1999 .

[23]  Scott D. Sudhoff,et al.  Analysis of Electric Machinery and Drive Systems , 1995 .

[24]  T. Omata,et al.  Effects of series impedance on power system load dynamics , 1999 .