Optimal analysis of resistive superconducting fault current limiters applied to a variable speed wind turbine system

This paper describes the effective study in optimal design of a combinatorial resistive superconducting fault current limiter (RSFCL) and a wind turbine (WT) system. In the proposed scheme, the permanent magnet synchronous generator (PMSG) based on coordinated control strategy is also considered to provide a reactive power support as well as retaining the active power production during and after the fault condition according to the certain grid code requirements. The comprehensive electro-thermal model demonstrating the RSFCL damping performance is applied as additional self-healing support outside the WPP to attenuate exceed current in faulty conditions. The results show that the optimal selection of RSFCL can increase the active power generation capacity of the WT, thereby enhancing the dc-link voltage smoothness as well as the low voltage ride-through (LVRT) capability of the wind farm. However, any alteration in the dimensions of the superconducting wires as well as fault durations can influence both the voltage reduction and the reactive power supplied by the WT at the point of common coupling (PCC). Thus, the numerical analysis is implemented to show the pros and cons of variation of RSFCL parameters on the optimal performance of WT system.