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An augmented automatic choosing control of observer type for nonlinear systems with linear measurement and its application to power systems
Author(s) -
Takata Hitoshi,
Hachino Tomohiro,
Nawata Toshinori
Publication year - 2009
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.20384
Subject(s) - control theory (sociology) , nonlinear system , observer (physics) , linearization , feedback linearization , controller (irrigation) , nonlinear control , control engineering , linear system , piecewise , automatic control , stability (learning theory) , piecewise linear function , computer science , mathematics , engineering , control (management) , mathematical analysis , physics , geometry , quantum mechanics , artificial intelligence , machine learning , agronomy , biology
This paper deals with a feedback control using automatic choosing functions and the observer‐control design procedure for nonlinear systems with linear measurement. A constant term which arises from linearization of a nonlinear equation is treated as a coefficient of a stable zero dynamics. A given nonlinear system is linearized piecewise so as to be able to design the linear optimal controllers with the linear observers. By the automatic choosing functions, these controllers are smoothly united into a single nonlinear feedback controller, which is called an augmented automatic choosing control of observer type. This controller is applied to a transient stability of power systems, whose simulation results show that the new controller enables to expand the stable region well. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.