Enhanced fault ride — Through ability of DFIG-based wind energy system using superconducting fault current limiter

Abstract

With rapid increase in the use of wind energy as a source of renewable energy, it is necessary to keep wind turbines (WT) connected with the grid during grid faults and other disturbance. Since the disconnection of wind energy system lose a significant share of power grid. To accomplish this issue protective measure should be taken. This paper incorporates superconducting fault current limiter (SFCL) for reducing the DC link voltage and the fault current range at the stator side along with improving the fault ride through (FRT) ability of the doubly fed induction generator (DFIG). Considering the stator current and dc-link voltage, elaborated simulation outputs are derived with and without SFCL. Analysis of the stator currents and dc link voltage is done along with the variation of SFCL resistance. The entire simulation is carried out using MATLAB/Simulink software. The results obtained confirm the effectiveness of SFCL in decreasing the fault current and dc link voltage.