Un aérogénérateur de 1,5 MW connecté au réseau électrique basé sur une machine synchrone à double excitation

The Industrial development and the economic fast growth rate come alongside an increasing power demand. Considering the environmental impact of traditional energy sources, wind energy represents a reliable alternative. This renewable source can be exploited by integrating large-scale wind turbines into the utility grid. However, due to the random nature of the wind, the grid connection requires complex power electronics interfaces. Besides, the operating mechanism of the Wind Conversion System (WCS) also relies on the performances of the generator and the adopted control scheme. In this paper, a 1.5 MW grid-connected WCS architecture based on a Hybrid Excitation Synchronous Generator (HESG) is proposed and modeled. The FAST simulation tool is used for the aerodynamic modelling of the wind turbine. A multi-level cascaded H-bridge inverter is used for the grid connection. A CRONE controller is implemented for the HESG velocity loop and a PI-based fuzzy logic controller (FLC-PI) is adopted for the pitch control. The model is simulated in different operating regions. Efficient control is achieved and promising results are obtained using the proposed grid connection interface.