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Discrete-Event Systems Supervisory Control for a Dynamic Flow Controller

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4 Author(s)
Afzalian, A.A. ; Shahid Abbaspour Univ. of Technol., Tehran ; Nabavi Niaki, S.A. ; Iravani, M.R. ; Wonham, W.M.

This paper presents supervisory control of a dynamic flow controller (DFC) based on the discrete-event systems (DES) theory. A DFC can be considered as a flexible AC transmission system controller and includes a mechanically-switched phase-shifting transformer, a multimodule thyristor-switched capacitor, a multimodule thyristor-switched reactor, and a mechanically switched capacitor. Owing to the inherent discrete switching nature of a DFC, its components are modeled as finite automata; then, a DES supervisory control is designed to implement the control logic of the DFC system in different modes of operation (i.e., ldquoautomaticrdquo and ldquoauto/manualrdquo). It is shown that the specifications are controllable and the synthesized supervisors are nonblocking in both modes and the modular supervisors nonconflict in auto/manual mode.

Published in:

Power Delivery, IEEE Transactions on  (Volume:24 ,  Issue: 1 )