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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...
Doubly fed induction generators (DFIG) are more and more used in wind farms. Their reactive power generation capabilities are related to their operating points (wind speeds). This paper describes a hierarchical supervisory of the reactive power in a wind farm and focuses on the reactive power local supervisory unit of each DFIG based wind generator. In this context, a local supervisory algorithm is...
In this paper, we propose a grid-connected photovoltaic power system including batteries in order to provide prescribed reactive and real powers to the grid. According to the stochastic nature of the photovoltaic power, the main feature of the proposed system is to erase power fluctuations by designing a dedicated local control system. With batteries, the whole system is able to smooth the PV power...
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