Fault Management in DFIG Based Wind Turbine Using Sophisticated Advanced solid State Fault Current Limiter

Abstract

This paper represents a series connection of diode-bridge type resonance-based fault current limiter (RLC-BFCL), which elevates the low voltage ride-through (LVRT) capability. Proposed fault current limiter not only limits the fault current during symmetrical three line-to-ground faults (3LG) but also protects the rotor side converter (RSC) from destroying faults current and regains voltage very quickly. A 3LG fault is very severe for doubly fed induction generator (DFIG). It is crucial to enhance the transient stability of DFIG when this fault occurs. During standard operation time of DFIG, the proposed fault current limiter does not have any considerable effect. Also, it does not require the use of any measurement and control system. The proposed RLC-BFCL returns to its regular operation after removing fault within a short while without any switching mechanism. In this way, it enhances the transient stability and maintains the grid code requirements. Proposed FCL's performance compares with another fault current limiter, series dynamic braking resistor (SDBR) for proving its effectiveness. Simulation has done using PSCAD/EMTDC.