Mixed-sensitivity approach to H-infinity control of power system oscillations employing multiple FACTS devices

Chaudhuri, Balarko and Pal, Bikash C. and Zolotas, Argyrios and Jaimoukha, Imad M. and Green, Tim C. (2003) Mixed-sensitivity approach to H-infinity control of power system oscillations employing multiple FACTS devices. IEEE Transactions on Power Systems, 18 (3). 1149 - 1156. ISSN 0885-8950

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Mixed-sensitivity approach to H-infinity control of power system oscillations employing multiple FACTS devices

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Abstract

This paper demonstrates the enhancement of inter-area mode damping by multiple flexible AC transmission systems (FACTS) devices. Power system damping control design is formulated as an output disturbance rejection problem. A decentralized H-infinity damping control design based on the mixed-sensitivity formulation in the linear matrix inequality (LMI) framework is carried out. A systematic procedure for selecting the weights for shaping the open loop plant for control design is suggested. A 16-machine, five-area study system reinforced with a controllable series capacitor (CSC), a static VAr compensator (SVC), and a controllable phase shifter (CPS) at different locations is considered. The controllers designed for these devices are found to effectively damp out inter-area oscillations. The damping performance of the controllers is examined in the frequency and time domains for various operating scenarios. The controllers are found to be robust in the face of varying power-flow patterns, nature of loads, tie-line strengths, and system nonlinearities, including device saturations

Keywords:control design, controllable phase shifter, controllable series capacitor, damping performance, device saturation, frequency domain, inter-area mode damping, inter-area oscillations, large interconnected power systems, linear matrix inequalities, mixed-sensitivity approach, multiple FACTS devices, multiple flexible AC transmission systems devices, output disturbance rejection, power system damping control, power system oscillations, static VAr compensator, system nonlinearities, decentralised H infin, control system synthesis, damping, decentralised control, flexible AC transmission systems, frequency-domain analysis, load flow, oscillations, power system control, power system interconnection, power system stability, time-domain analysis
Subjects:H Engineering > H620 Electrical Engineering
H Engineering > H660 Control Systems
H Engineering > H100 General Engineering
H Engineering > H630 Electrical Power
Divisions:College of Science > School of Engineering
ID Code:15065
Deposited On:01 Oct 2014 09:52

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