Damping of Low-Frequency Oscillations in a Power System, Based on Multiple-Model Optimal Control Strategy

Author:

Pagard Elahe1ORCID,Shojaeian Shahrokh1ORCID,Rezaei Mohammad Mahdi1ORCID

Affiliation:

1. Department of Electrical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran

Abstract

This paper proposes a new control strategy based on multimodel linear optimization control (MMLOC) to damp power system low-frequency oscillations (LFO) faster. The multimodel control strategy is used to anticipate synchronous generator dynamic behavior and linear optimization control for generating a control signal uncomplicatedly. The third-order model of synchronous machine is considered for each of the models. The probability of each model’s validity is evaluated from the difference between model outputs and the same actual power system outputs via the Bayesian approach. To improve the postfault dynamics of the case study power system, which contains a static VAR compensator, a linear optimal controller (LOC) is designed. The 8th order model of the machines is used in simulations to represent the plant as accurately as possible.

Publisher

Hindawi Limited

Subject

Electrical and Electronic Engineering,Energy Engineering and Power Technology,Modeling and Simulation

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