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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...
Nowadays, there is a tendency to increase the power of wind turbines. Multilevel converter is a realistic alternative in such high power applications. As the most widely used variably speed wind turbine, doubly fed induction generators (DFIG) are very sensitive to grid disturbances. Moreover, grid codes have been revised to require wind turbines to provide Low Voltage Ride-Through (LVRT) ability....
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...
A hybrid power system is proposed and is based on wind energy conversion system with hydrogen based long-term storage unit and super-capacitor based fast-dynamic storage unit. A power management algorithm is organized in different time scales for its normal operating mode. Four studied cases show that, the long-term storage can compensate or absorb the difference between the generated fluctuating...
This paper gives a control oriented modeling of an electrolyzer, as well as the ancillary system for the hydrogen production process, by using causal ordering graph. The control system has also been proposed to manage the power flow and hydrogen flow. The simulation results have highlighted the variation domains and dynamics of physical quantities.
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