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Dual Heuristic Programming Excitation Neurocontrol for Generators in a Multi machine Power System

By Ganesh Kumar Venayagamoorthy and Senior MemberRonald G. Harley, Donald C. Wunsch and Senior Member

Abstract

Abstract—The design of nonlinear optimal neurocontrollers that replace the conventional automatic voltage regulators for excitation control of turbogenerators in a multimachine power system is presented in this paper. The neurocontroller design is based on Dual Heuristic Programming (DHP), a powerful adaptive critic technique. The feedback variables are completely based on local measurements from the generators. Simulations on a three-machine power system demonstrate that DHP-based neurocontrol is much more effective than the conventional proportional–integral–derivative control for improving dynamic performance and stability of the power grid under small and large disturbances. This paper also shows how to design optimal multiple neurocontrollers for nonlinear systems, such as power systems, without having to do continually online training of the neural networks, thus avoiding risks of neural network instability. Index Terms—Adaptive critics, artificial neural networks (ANNs), generators, multimachine power systems, multiple nonlinear optimal neurocontrollers, power system stability, voltage regulation. I

Year: 2003
OAI identifier: oai:CiteSeerX.psu:10.1.1.320.9623
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