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This paper presents a theoretical study, a numerical simulation and an experimental validation of a Wind Energy Conversion System (WECS) control by using a back to back three-level NPC converter. In this context, the WECS, which is based on Doubly Fed induction Generator (DFIG), has been briefly described, and its hierarchical control system with a three-level NPC back-to-back converter has been detailed...
A classical wind energy conversion system is usually a passive generator. Its power does not depend on the grid requirement, but entirely on the fluctuant wind condition. In this paper a DC-coupled wind/hydrogen/super-capacitor hybrid power system is studied. The purpose of the control system is to coordinate these different sources, especially their power exchange, in order to make the generated...
Nowadays, the most widely used variable speed wind turbine type for units above 1 MW is doubly fed induction generator (DFIG). As the wind power penetration continues to increase, wind turbines are required to remain connected during grid faults to ride-through the faults. This paper gives a control oriented modeling of DFIG wind turbines by using causal ordering graph (COG). The control system consists...
A dynamic model of a micro gas turbine generator by using a causal ordering graph is proposed in this paper. This particular graphical representation is used to highlight the causal order of all mathematical equations. It is shown that the obtained model is interesting for developing a Matlab Simulink model and for designing the control strategy. In order to control the power flow a second model is...
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