A study on LQG/LTR control for damping inter-area oscillations in power systems

Zolotas, Argyrios and Chaudhuri, Balarko and Jaimoukha, Imad M and Korba, Petr (2007) A study on LQG/LTR control for damping inter-area oscillations in power systems. IEEE Transactions on Control Systems Technology, 15 (1). 151 -160. ISSN 1063-6536

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A study on LQG/LTR control for damping inter-area oscillations in power systems

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Abstract

This brief presents results on a robust linear quadratic Gaussian (LQG) damping control scheme for improving the inter-area mode oscillations of power systems. A technique is also proposed to guarantee minimum-phase/well-damped transmission zeros by appropriately "squaring" the design plant, for the purposes of efficient robust recovery. A 7th-order multiple-input single-output (MISO) centralized controller is designed for a 16-machine, 5-area power system (138th order) reinforced with a thyristor-controlled series capacitor (TCSC) to improve the damping of the critical inter-area modes by employing appropriate global signal measurements. Loop transfer recovery (LTR) is then applied to reinforce controller robustness in the case of faults and unknown disturbances. The performance of the designed system is assessed in the frequency domain and via appropriate time-domain simulations based upon the nonlinear model under a variety of scenaria

Keywords:damping interarea oscillations, flexible AC transmission systems, loop transfer recovery, multiple-input single-output centralized controller, robust linear quadratic Gaussian damping control, thyristor-controlled series capacitor, control system synthesis, damping, linear quadratic Gaussian control, power transmission control, robust control, thyristors
Subjects:H Engineering > H620 Electrical Engineering
H Engineering > H660 Control Systems
H Engineering > H100 General Engineering
G Mathematical and Computer Sciences > G190 Mathematics not elsewhere classified
Divisions:College of Science > School of Engineering
ID Code:15064
Deposited On:01 Oct 2014 09:41

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