A Low Voltage Ride Through Scheme For Dfig Based Wind Farm With Sfcl And Rsc Control

In this paper it presents a Low Voltage Ride Through (LVRT) demand proposed in grid codes, a Resistive-type Superconducting Fault Current Limiter (R-SFCL) LVRT solution for doubly fed induction generator (DFIG) based wind turbine generators(WTGs).The installed position, equivalent modelling of R-SFCL and technical principle for improving LVRT capability are described. Cooperative control between R-SFCL and two advanced control strategies: Reactive Power Control (RPC) and Inductance-Emulating Control (IEC) are used to help DFIG to generate reactive power and protect key parameters during grid faults. The simulations and the performance evaluation are also conducted compared with the single IEC scheme and single RPC-IEC scheme, which determines the effectiveness and superiority of the proposed scheme on enhancing LVRT capability.