TIMED DISCRETE-EVENT SYSTEM SUPERVISORY CONTROL FOR UNDER-LOAD TAP-CHANGING TRANSFORMERS

A. Afzalian, A. Saadatpoor, W. M. Wonham

2006

Abstract

Timed discrete-event systems (TDES) have so far not been used for modelling and control of electrical power system. Since these systems have both logical and temporal behavior, we propose to use TDES to address their control problems. Under-load tap-changing transformers (ULTC) which obviously have discrete-event behavior are widely used in transmission systems to take care of instantaneous variations in the load conditions in substations. ULTC may be controlled either automatically or manually. This paper discusses the modelling and synthesis of a timed discrete-event system supervisory controller for ULTC. Different modes of operation are considered and it is shown that the specifications are controllable and the closed loop control system is non-blocking. Protective system designers in electrical power systems can use the proposed approach to verify their required temporal and logical behavior.

References

  1. Afzalian, A. and Wonham, W. M. (2006). Discrete-event system supervisory controller design for an electrical power transmission network. In 14th Iranian Conference on Electrical Engineering (ICEE'06), Tehran.
  2. Brandin, B. and Wonham, W. M. (1994). Supervisory control of timed discrete event systems. IEEE Transactions on Automatic Control, 39(2):329-342.
  3. GE (2005). Consumer Industrial, DTR - Digital Tap Changer Controller Instruction Manual GEK106305A. p. 7-12.
  4. Hiskens, I. A. and Sokolowski, P. J. (2001). Systematic modeling and symbolically assisted simulation of power systems. IEEE Transactions on Power Systems, 16(2): p. 229-234.
  5. Kundur, P. (1994). Power System Stability and Control. McGraw-Hill.
  6. Lin, S.-Y., Ho, Y.-C., and Lin, C. I.-H. (2004). An ordinal optimization theory-based algorithm for solving the optimal power flow problem with discrete control variables. IEEE Transactions on Power Systems, 19(1): p. 276-286.
  7. Ohtsuki, H., Yokoyama, A., and Sekine, Y. (1991). Reverse action of on-load tap changer in association with voltage collapse. IEEE Transactions on Power Systems, 6(1): p. 300-306.
  8. Ostroff, J. S. (1990). Deciding properties of timed transition models. IEEE Transactions on Parallel and Distributed Systems, 1(2):170-183.
  9. Otomega, B., Sermanson, V., and Cutsem, T. V. (2003). Reverse-logic control of load tap changers in emergency voltage conditions. in Proceedings of Power Tech Conference, Bologna.
  10. Prosser, J. (1995). Supervisory control of electric power transmission networks. IEEE Transactions on Power Systems, 10(2): p. 1104-1110.
  11. Ramadge, P. J. and Wonham, W. M. (1987). Supervisory control of a class of discrete event processes. SIAM J. Contr. Optim., 25(1):206-230.
  12. Wonham, W. M. (2005). Supervisory Control of DiscreteEvent Systems. Department of Electrical and Computer Engineering, University of Toronto, available at http://www.control.utoronto.ca/DES.
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Paper Citation


in Harvard Style

Afzalian A., Saadatpoor A. and M. Wonham W. (2006). TIMED DISCRETE-EVENT SYSTEM SUPERVISORY CONTROL FOR UNDER-LOAD TAP-CHANGING TRANSFORMERS . In Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO, ISBN 978-972-8865-61-0, pages 85-90. DOI: 10.5220/0001213400850090


in Bibtex Style

@conference{icinco06,
author={A. Afzalian and A. Saadatpoor and W. M. Wonham},
title={TIMED DISCRETE-EVENT SYSTEM SUPERVISORY CONTROL FOR UNDER-LOAD TAP-CHANGING TRANSFORMERS},
booktitle={Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO,},
year={2006},
pages={85-90},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001213400850090},
isbn={978-972-8865-61-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 3: ICINCO,
TI - TIMED DISCRETE-EVENT SYSTEM SUPERVISORY CONTROL FOR UNDER-LOAD TAP-CHANGING TRANSFORMERS
SN - 978-972-8865-61-0
AU - Afzalian A.
AU - Saadatpoor A.
AU - M. Wonham W.
PY - 2006
SP - 85
EP - 90
DO - 10.5220/0001213400850090