Improvement of Transient Stability of Dfig Based Wind Generator by Resistive Type Solid State Fault Current Limiter Using Fuzzy Controller

Abstract

Transient stability is one of the main problems for the Doubly-Fed Induction Generator (DFIG) based variable speed Wind Generator (WG) system during the fault, as DFIGs stator windings are straight forwardly associated with the grid. In this paper, a resistive type solid state fault current limiter (R-type SSFCL) with fuzzy logic controller is proposed to expand the transient stability of the DFIG based variable speed WG system. A three-line-to-ground (3LG), twofold line-to-ground (2LG) and single-line-to-ground (1LG) deficiencies were connected to one of the doubled circuit transmission lines of the test system to explore the R-type SSFCL transient stability execution. Furthermore, a Bridge type Fault Current Limiter (BFCL) and a LR-type Solid State Fault Current Limiter (SSFCL-LR) are additionally considered to contrast their execution and the proposed R-type SSFCL. Simulations were done in MATLAB/Simulink programming. Simulation results demonstrate that the SSFCL upgrades the transient stability of the DFIG system. Besides, this R-type SSFCL with fuzzy logic controller works superior to the R-type SSFCL with pi controller, BFCL, and LR-SSFCL in every prospect.