Mitigation of harmonic current produced by wind turbine throughout converter switching control

摘要

When considering grid integration, it is recognized that wind farms are able to bring about power quality impacts at the connection point. Focusing the attention towards this framework, a large amount of effort has been given to achieve the required level of compatibility between the wind turbine and the AC grid. Amongst the various existing power quality phenomena, harmonic distortion emerges as a relevant challenge. In fact, the full or partial power electronics converters existing on wind energy conversion systems has a direct effect upon the THD and the search for solutions to reduce the harmonic current injection emerges as an important issue. Thus, this paper focuses on the use of a control strategy applied to full converter wind systems aiming at reducing the level of harmonic currents similar to an active filter based inverter technique. In addition to the physical and mathematical principles, computational studies are carried out to highlight the methodology's effectiveness.