Effect of Low Voltage Ride-Through Capability of Doubly-Fed Induction Generator Wind Turbines for Transient Stability of Small Power Producer

摘要

With an increasing of the Doubly-Fed Induction Generator (DFIG) based wind turbine implementations, hence, this paper presents an effect of low voltage ride-through capability of the DFIG wind turbines for transient stability of Small Power Producer (SPP). The DFIG, without the low voltage ride-through capability, can be disconnected from a power grid because of a protection scheme of the DFIG. Therefore, the DFIG tripping can perturb the transient stability of the power system, especially in the SPP applications. To enhance the low voltage ride-through capability of the DFIG wind turbines, Superconducting Fault Current Limiter (SFCL) using High Temperature Superconductor (HTS) is fully implemented in this paper. As the simulated results without the capability to ride through the fault, the effect of the DFIG is completely demonstrated that the DFIGs can perturb the transient stability of the SPP. For solving this problem utilizing the SFCL, the DFIG allows riding through the fault under the Swedish grid code requirement, improving the transient stability of SPP.