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has been cited by the following article:

• TITLE: Design of Robust Controller for LFC of Interconnected Power System Considering Communication Delays

  AUTHORS: T. Jesintha Mary, P. Rangarajan

  KEYWORDS: Continuous Pole Placement Technique, Delay Margin, Delay-Dependent Stability Analysis, Frequency Sweeping Test, Load Frequency Control with Time Delays, Output Feedback Control

  JOURNAL NAME: Circuits and Systems, Vol.7 No.6, May 13, 2016

  ABSTRACT: The usage of open communication infrastructure for transmitting the control signals in the Load Frequency Control (LFC) scheme of power system introduces time delays. These time delays may degrade the dynamic performance of the power system. This paper proposes a robust method to design a controller for multi-area LFC schemes considering communication delays. In existing literature, the controller values of LFC are designed using time domain approach which is less accurate than the proposed method. In proposed method, the controller values are determined by moving the rightmosteigenvalues of the system to the left half plane in a quasi-continuous way for a preset upper bound of time delay. Then the robustness of the proposed controller is assessed by estimating the maximumtolerable value of time delay for maintaining system stability. Simulation studies are carried out for multi-area LFC scheme equipped with the proposed controller using Matlab/simulink. From the results, it has been concluded that the proposed controller guarantees the tolerance for all time delays smaller than the preset upper bound and provides a bigger delay margin than the existing controllers.