DFIG-based fuzzy sliding-mode control of WECS with a flywheel energy storage

In this paper the so-called sliding-mode control (SMC) technique used with fuzzy control is applied to control a variable speed wind energy conversion system (WECS) with a doubly fed induction generator (DFIG). The paper also points out interesting performances of the double-fed induction machine (DFIM) used as a flywheel energy storage system (FESS). In fact, adjusting the rotor speed can allow the induction machine to release kinetic energy to the power system or to absorb this energy from the utility grid. The DFIM enables decoupled control of system active and reactive powers in both steady and transient states. The effectiveness of the proposed DFIG-based WECS control approach along with FESS is demonstrated with computer simulation results

► Integration of a variable-speed wind energy conversion system used with a flywheel energy-storage system has been described.
► Control algorithm based on the Fuzzy-Sliding Mode was investigated for the doubly fed induction machine.
► The proposed flywheel energy storage system has the ability and the reliability to produce more clean power to the grid.