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Neuro-fuzzy controller of low head hydropower plants using adaptive-network based fuzzy inference system

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4 Author(s)
Djukanovic, M.B. ; Dept. of Power Syst., Inst. Nikola Tesla, Belgrade, Yugoslavia ; Calovic, M.S. ; Vesovic, B.V. ; Sobajic, D.J.

This paper presents an attempt of nonlinear, multivariable control of low-head hydropower plants, by using adaptive-network based fuzzy inference system (ANFIS). The new design technique enhances fuzzy controllers with self-learning capability for achieving prescribed control objectives in a near optimal manner. The controller has flexibility for accepting more sensory information, with the main goal to improve the generator unit transients, by adjusting the exciter input, the wicket gate and runner blade positions. The developed ANFIS controller whose control signals are adjusted by using incomplete on-line measurements, can offer better damping effects to generator oscillations over a wide range of operating conditions, than conventional controllers. Digital simulations of hydropower plant equipped with low-head Kaplan turbine are performed and the comparisons of conventional excitation-governor control, state-feedback optimal control and ANFIS based output feedback control are presented. To demonstrate the effectiveness of the proposed control scheme and the robustness of the acquired neuro-fuzzy controller, the controller has been implemented on a complex high-order nonlinear hydrogenerator model

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Energy Conversion, IEEE Transactions on  (Volume:12 ,  Issue: 4 )