Fuzzy Logic Controlled Superconducting Magnetic Energy Storage for Leveling Power Fluctuation of Grid Connected Wind Generator

Abstract

This paper proposes the use of Superconducting Magnetic Energy Storage (SMES) unit to level the power fluctuation of doubly- fed induction generator (DFIG) based wind power generating system. The SMES unit is composed of superconducting (SC) magnet and dc-chopper which is connected at the dc side of rotor side and grid side converter of DFIG. The dc-chopper is controlled by using a Fuzzy Logic Controller (FLC). The superconducting magnet can separately control the active power flow of the rotor through the rotor side converter (RSC) and that of the power grid through the grid side converter (GSC) of DFIG. The SMES unit can contribute stabilizing the output power of DFIG based on the system requirement. Simulations are carried out using MATLAB SIMULINK to appraise the performance of FLC controlled SMES in a DFIG based wind power generating system.