Özet:

High voltage ride through (HVRT) and low voltage ride through (LVRT) may result in serious problems when doubly fed induction generator-based wind turbine (DFIG_WT) is connected to the electrical grid. This paper investigates on the integration of a dynamic voltage restorer (DVR) and a superconducting magnetic energy storage system (SMES) with the conventional structure. This novel configuration enhances the fault ride-through (FRT) capability of the DFIG_WT in order to maintain production even in case of grid defects. The SMES was coupled in parallel to the dc-link in order to regulate the capacitor voltage through the DC/DC chopper and to ensure the energy exchange with the grid in both directions. The DVR is used to compensate the voltage unbalance on the system terminals. Simulation results of different applied fault were presented in order to prove the robustness of the proposed control strategies and to validate the performance found by the integration of the DVR _SMES with the DFIG_WT.

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