Delay Scheduling in TCSC Control to Improve Power Oscillation Damping

Document Type : Original Article

Authors

1 Electrical and Computer Engineering Department, Islamic Azad University, North Tehran Branch, Tehran, Iran

2 Electrical and Computer Engineering Department, Islamic Azad University, Science and Research Branch, Tehran, Iran,

3 Electrical and Computer Engineering Department, University of K. N. Toosi, Tehran, Iran,

Abstract

Wide area power oscillation damping (WAPOD) is a very effective controller to damp out the inter-area electromechanical oscillations in the wide area power systems. This controller requires communication networks to receive the remote outputs. The use of communication networks causes delays in feedback loops. This delay reduces the controller's performance. Therefore, in order to improve the performance of the control system in the presence of delay, in this paper a WAPOD controller is designed using delay scheduling for the TCSC supplemental control. To select control structure, a method is proposed that allows optimization of stability in the range of delay. To design the controller, the the real part of the rightmost electromechanical mode is minimized. Case studies is based on a four-machine power system. Effectiveness of the proposed WAPOD controller is verified by simulation studies and compared with a conventional delayed design approach.

Keywords

References

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