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This paper presents an enhanced direct power control (DPC) algorithm for doubly fed induction generators (DFIG) capable of reducing the common mode voltage (CMV). Nowadays the DFIG is often used in high power wind energy conversion systems (WECS). A common problem of converter fed induction machines are the bearing damages due to the bearing currents. The source of this problem is the common mode...
The high penetration level of wind power generation in an interconnected electrical network carries new technical challenges regarding system stability. Despite the stochastic nature of the wind, grid reliability has to be guaranteed. In compliance with power companies' new requirements on wind turbines as regards contribution to voltage regulation, this paper proposes a reactive power controller...
Nowadays the doubly fed induction machine (DFIG) is often used as a generator in high power wind energy systems. Advantages in comparison to a synchronous generator are the small size of the converter and the viable alternative to adjust speed over a wide range. Decoupled control of active and reactive power can be realized using a dynamic model of the DFIG. Instead of a classic space vector modulation...
Nowadays the doubly fed induction machine is often used as generator in high power windenergy systems. Because of the use of two converters in the generator's rotor circuit bearing damages can occurred specially for this type of machine. So the aim is to reduce the common mode voltage as one cause of bearing currents. Instead of a classic space vector modulation this paper presents the simulation...
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