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Doubly fed induction generator (DFIG) still shares a large part in today's wind power market. It provides the benefits of variable speed operation cost-effectively, and can control its active and reactive power independently. Crowbar protection is often adopted to protect the rotor-side voltage source converter (VSC) from transient overcurrent during grid voltage dip. But under unbalanced grid voltage...
Today, doubly fed induction generator (DFIG) gains the dominant market power in the wind energy industry. It provides the benefits of variable speed operation cost-effectively, and can control its active and reactive power independently. Crowbar protection is often adopted to protect the rotor side voltage source converter (VSC) from transient over current during grid voltage dip. But under unsymmetrical...
Electric motors (EM) are widely used in industry for a large variety of applications, such as traction motors used in electric and hybrid vehicles. In this paper a hybrid electric vehicle is considered, which contains both an internal combustion engine and an EM. Without focusing on the other components of the vehicle, the EM is treated in detail, both regarding modelling aspects and control solutions...
This paper brings some practical results of research devoted to the new generation of mobile electrical power sources, based on the VSCF technology (variable speed-constant frequency). In this generation of mobile electrical power sources the driving motor and generator speed is optimally controlled in accordance with the load power thus decreasing the fuel consumption. The output voltage and frequency...
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