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Nowadays, there is a tendency to increase the capacity of wind turbines, multilevel converter is a realistic alternative in such high power applications. As the wind power penetration continues to increase, grid codes have been revised to require wind farms to operate as conventional power plants. This paper proposes a reconfiguration scheme of control strategies for doubly fed induction generator...
This paper presents a general modeling and an experimental validation of a doubly fed induction generator (DFIG) based wind conversion system (WCS). The wind conversion system has been briefly presented. Then, the d q control of the grid side converter (GSC) has been detailed theoretically. Moreover, the decoupled active and reactive powers control of the DFIG has been presented. The last is carried...
Nowadays, the most widely used variable speed machine for wind turbine above 1 MW is the doubly fed induction generator (DFIG). As the wind power penetration continues to increase, wind turbines are required to provide Low Voltage Ride-Through (LVRT) capability. Crowbars are commonly used to protect the power converters during voltage dips. Its main drawback is that the DFIG absorbs reactive power...
In this paper a graphical modelling tool is proposed to develop a fuzzy logic based supervisor. This tool facilitates the analysis and the determination of fuzzy control algorithms adapted to complex hybrid systems. To explain this methodology, the association of wind generators, dispersed generator and storage systems are considered. The performance of this supervisor is shown with the help of simulations...
One of the most inherent problems of the multi-level NPC topology is to maintain the neutral point voltage in a narrow band around the half of the DC voltage. This paper presents a DC-link voltage balancing algorithm for three-level voltage source inverter using a new space-vector based on hysteresis current control (SV-HCC). The proposed SV-HCC controls the active and reactive power delivered to...
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...
In this paper an equivalent continuous model of power electronic converters is used to design a dynamic model of an entire gas micro turbine generation system. It is shown that the obtained model is interesting for analyzing the dynamic behavior of the entire system and for designing the control strategy of AC and DC electrical quantities. In order to control the power flows a dedicated model is designed...
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