Design of a Robust Controller by LQG/LTR Formalism for Francis hydro Turbine Driving a Synchronous Generator
Yeremou Tamtsia Aurélien1, Nneme Nneme Léandre2, Samba Aimé Hervé3

1Yeremou Tamtsia Aurelien*, Department of Industrial Robotic, Faculty of Industrial Engineering, University of Douala, Cameroon.
2Nneme Nneme Léandre, Department of Electrical Engineering, Higher Technical Teacher Training College, University of Douala, Cameroon.
3Samba Aimé Hervé, Department of Industrial Robotic, Faculty of Industrial Engineering, University of Douala, Cameroon.
Manuscript received on September 22, 2019. | Revised Manuscript received on October 15, 2019. | Manuscript published on October 30, 2019. | PP: 854-860 | Volume-9 Issue-1, October 2019 | Retrieval Number: A9392109119/2019©BEIESP | DOI: 10.35940/ijeat.A9392.109119
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Abstract: This paper presents the design and application of a robust controller by Linear-Quadratic-Gaussian method with Loop-Transfer-Recovery (LQG-LTR) at the same time to carefully attain performance and robustness objectives. To improve Stability, the robust controller has been shown to provide good performance i n normal operations conditions. Objectives cannot be suitable unless the controller can perpetuate such quality in the presence of plant uncertainties or any working conditions in the hydroelectric power plants. The approach is based to synthesizing a robust controller minimizing a quadratic criterion (controller LQG) while using the Loop Transfer Recovery (LTR), to restore robustness properties of the Estimator. In this study, we applied this robust control law on the model of a Francis hydro turbine. Computer simulations are carried out to establish a n d compare the performance and robustness of using the Infinite horizon control ( H ), internal model control (IMC), Proportional Integral Derived (PID) and LQG-LTR controllers.
Keywords: Francis hydro Turbine, Speed, LQG LTR, parametric disturbance hydro- power plant.