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COCORED: Técnicas de control avanzado para la mejora de la operación de convertidores VSI conectados a la red eléctrica.

Responsable: Robert Griñó Cubero (DPI2010-15110)

Responsable del projecte: Robert Griñó Cubero
Entitat finançadora: Ministerio de Ciencia e Innovación
Data inici: 01/01/2011
Data final: 31/12/2013



The project foresees to contribute in the control systems theory area and, also, in a particular power electronics application with a clear practical interest. So, in this sense, the aim of the project is twofold. On the one hand, to obtain theoretical results in the field of the control techniques that will be worked. These results are envisaged in two main areas: first, to obtain robust control algorithms in front of model uncertainty and, also, in front of the fundamental frequency variations of the signals to be tracked or attenuated; and, second, to state design methodologies clearer enough to allow its industrial use. On the other hand, to apply these control techniques, with the obtained theoretical enhancements, to the particular problem of AC-DC and DC-AC conversion with a non-ideal grid. It is important to remark that the grid anomalous situations can be captured in the uncertainty types that will be theoretically worked in the project.


In any case, the experimental plant will be a power bidirectional three-phase power electronics converter with a voltage DC bus (VSI) in its two operational modes: active rectifier and inverter connected to the grid. Also, a special emphasis will be done in the validation of its operation with various grid situations: fundamental frequency variations, non-sinusoidal voltages (with higher-order harmonics), asymmetrical three-phase systems and unknown and time-variant network impedances (strong and weak grids). It is important to note that the dynamics of these plants is very fast, their measurement noise levels are high, the sensors have a limited bandwidth by cost reasons and the sampling period is bounded from below by the required computation time of the control algorithm and by the necessity to reduce the switching losses of the converter to obtain an adequate power efficiency.

Another objective of the project is to ensure that the designed controllers will be interesting, by their complexity and their hardware implementation cost, for the industrial sector.


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