NDLI: SDM hybrid control approach for nonlinear systems and its application to power systems

Content Provider	IEEE Xplore Digital Library
Author	Feng Liu Shengwei Mei Qiang Lu
Copyright Year	2003
Description	Author affiliation: Nat. Key Lab of Electr. Eng., Tsinghua Univ., Beijing, China (Feng Liu; Shengwei Mei; Qiang Lu)
Abstract	This paper proposes a new approach, which may tentatively be called as SDM hybrid control for affine nonlinear systems. A class of non-minimum phase nonlinear control systems can hardly be linearized completely just via state feedback. It is revealed in this paper that the skill of dynamic extension and so-called SD feedback (state and dynamic feedback) could be helpful to achieve the linearized part with higher dimensions of such kind of nonlinear systems so as to obtain better control effects. Furthermore, for a class of engineering control systems, the models involve some complicated nonlinear functions that can be measured directly. That useful feature could and should be applied to controller design, thereby forming SM feedback (state and measurement feedback), which is defined and employed to simplify the controller design. It is also demonstrated that SM feedback is favorable to apply to decouple interconnected systems and achieve decentralized control. Integrating both SD and SM feedback methods, the SDM hybrid control approach is proposed. As applications of it, the nonlinear optimal governor controller for hydroturbine-generator sets is taken as examples for illustration. The micro-alternator tests are performed on one-machine, infinite-bus (OMIB) system and the computer ones are carried on an 8-machine, 36-buses system respectively. The results of both physical and digital tests manifest that the performances and stability of the system are markedly improved comparing with conventional PID controllers, which also verify the promising prospective of the proposed approach.
Starting Page	1657
Ending Page	1664
File Size	533199
Page Count	8
File Format	PDF
ISBN	0780379896
DOI	10.1109/PES.2003.1267405
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-07-13
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hybrid power systems Nonlinear control systems Control systems Nonlinear systems Power system control Power systems State feedback Samarium Power system dynamics System testing
Content Type	Text
Resource Type	Article

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