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A robust decentralized approach to the multiarea frequency control of power systems
Author(s) -
Miyazaki Mariko,
Liu KangZhi,
Saito Osami
Publication year - 2002
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10004
Subject(s) - control theory (sociology) , robustness (evolution) , electric power system , frequency deviation , automatic frequency control , robust control , decentralised system , mimo , control engineering , engineering , power (physics) , transmission (telecommunications) , control system , control (management) , computer science , electronic engineering , telecommunications , beamforming , biochemistry , chemistry , physics , electrical engineering , quantum mechanics , artificial intelligence , gene
Abstract It is an important problem in multiarea power systems to attenuate the frequency deviation due to load change. Since power systems are spatially dispersive, decentralized control is more practical than lumped control. In this paper, we propose two robust decentralized control schemes for this problem. The difficulty with this problem is that the linearized model of a multiarea power system with frequency deviations as outputs is a MIMO system that has a transmission zero at s = 0. They key idea is to change the output of one subsystem so that the resulting new plant does not have any zero at s = 0. The new outputs are chosen carefully so that the regulation of the new outputs can guarantee the regulation of all frequency deviations and tieline power. Further, parameter uncertainty is taken into account in the controller design to achieve robustness. Simulation shows that the proposed methods are effective. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 140(1): 68–76, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10004