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Gain and phase margins based delay-dependent stability analysis of two-area LFC system with communication delays
Authors
Ayasun S.
Sönmez Ş.
Publication date
1 January 2018
Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
10th International Conference on Electrical and Electronics Engineering, ELECO 2017 -- 29 November 2017 through 2 December 2017 -- -- 134351This paper investigates the effect gain and phase margins (GPM) on delay-dependent stability analysis of a two-area load frequency control (LFC) system with communication delays. An frequency-domain based exact method that takes into account both gain and phase margins is utilized to determine stability delay margins in terms of system and controller parameters. A gain-phase margin tester (GPMT) is introduced to the LFC system as to take into gain and phase margins in delay margin computation. For a wide range of proportional - integral (PI) controller gains, time delay values at which LFC system is both stable and have desired stability margin measured by gain and phase margins are computed. The time-domain simulation studies indicate that delay margins must be determined considering gain and phase margins to have a better dynamic performance in term of fast damping of oscillations, less overshoot and settling time. © 2017 EMO (Turkish Chamber of Electrical Enginners)
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Last time updated on 17/09/2020