Fault Ride Through Analysis of Grid Connected Doubly Fed Induction Generator Based Wind System

The world is slowly moving towards renewable based power generation to avoid the demerits associated with the conventional generation mainly global warming. Further, the increased depletion rate of fossil fuels over the years has enhanced the research investments on the renewables like photovoltaic (PV), Wind etc. Among variable speed wind generators, doubly fed induction generators (DFIG) based wind plants has gained more popularity over their counterparts. In this paper, the operation of DFIG based wind system in the grid connected mode is studied along with fault analysis. A 2 KW rated field programmable gate array (FPGA) controlled DFIG hardware setup is developed to carry out the experiment and the results are presented. This work provides overview on the fault ride through (FRT) behavior of the DFIG machine and helps to develop techniques to improve FRT of DFIG machine.