Using Dc Resistive Fault Current Limiter to Enhancement of Dfig Based Variable Speed Wind Generator at Symmetrical Fault Condition

Abstract

In this paper proposes a doubly fed induction machine transient stability is one of the important factors which we have to consider improving performance of wind generator. The symmetrical faults, the asymmetrical faults also may cause the DFIG face high mechanical stress which may lead to mechanical damage. Therefore, it is very important to investigate the fault ride through (FRT) capability of the DFIG system during the asymmetrical fault situations. In this work, in order to enhance the FRT capability of the DFIG based wind generation system, a DC resistive superconducting fault current limiter (SFCL) is proposed. In this work, in request to improve the FRT ability of the DFIG based wind generation system, a DC resistive Superconducting Fault Current Limiter (SFCL) is proposed. The performance of the proposed method is better than that of the BFCL. By using the simulation results we can analyse the proposed DC resistive SFCL improves the FRT ability of the DFIG based variable speed wind generator system during any type of asymmetrical faults in the power network.

Keywords— bridge type fault current limiter (BFCL), doubly fed induction generator (DFIG), fault ride through (FRT), superconducting fault current limiter (SFCL), wind energy conversion system (WECS)