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Wind energy is nowadays widespread and the increasing number of wind turbine installations leads to more and more severe grid code requirements for grid connection. Control and grid synchronization algorithm must ensure these requirements on the whole range of operating mode, from starting to nominal power generation mode. In this paper, authors present reconfiguration control strategies, in order...
This paper presents a three-level three-phase neutral-point-clamped back-to-back converter applied to a wind emulator, where a wind power generator is connected to the grid through the back-to-back converter. The converter regulates the power extracted from the generator and controls how this power is injected to the grid with the desired power factor. Two phase locked loops are in charge of synchronizing...
A new method for Grid connection of a Doubly Fed Induction Generator (DFIG) based wind power generation system relying on DPC principles is presented. This control method, called Direct Power Control for Grid Connection (DPCGC), is particularly very simple and gives fast response of the stator voltage to meet the synchronization conditions. Indeed the fact that the efficiency of the widely known control...
Doubly-fed induction generator (DFIG) is the most common type of generators for wind power generation, because of their high energy yield and the possibility of generating power at variable speeds. For most papers in literature, only the synchronization and power generation of DFIGs, but not the transition between them, are discussed. This paper presents a method to control the transition of DFIGs...
Power electronics devices used in power generation systems with electrical machines allow variable speed operation. A high quality output power is delivered to the transmission network. Moreover the power electronics allow stand alone operation in an island power systems, as well as in grid connected systems during the mains outage. This way the variable speed power generation systems are useful even...
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