The doubly-fed induction generator (DFIG) has good merits

such as small size

light weight and low cost

and is dominant in the wind power market. The DFIG

however

has two major problems to overcome. The first is that it has weak low voltage ride through capability; and the second is that its output power is unstable because of the variable wind speed. To overcome these two problems simultaneously

a superconducting fault current limiter-magnetic energy storage system (SFCL-MES) to be incorporated in the wind energy conversion system of the DFIG is proposed. The SFCL-MES principle is further applied to the wind farm. And a prototype to be installed in a wind farm is under development. An analysis is made on the SFCL-MES principle for the wind farm

and the corresponding topology and major parameter design methods are proposed. Simulations for real application parameters are carried out

the results verifying the efficacy and feasibility of the proposed approaches. This work is supported by National Natural Science Foundation of China (No. 50907070

No. 51361135705) and National High Technology Research and Development Program of China (863 Program) (No. 2013AA050803).