Proposal of a backstepping control strategy for dynamic performance improvement of PMSG Wind Farm with common DC bus

This study proposes a control system design for Electrical Network Connected Wind Farm (ENCWF) using Direct Drive Permanent Magnet Synchronous Generator (DD-PMSG). The generators are connected to the power network by Voltage Source Converter (VSC) with a dc-link. The proposed scheme is based on Backstepping technique and regulates the powers exchanged between the ENCWF and the electric network to ensure a Maximum Power Tracking (MPT) of the wind system. The overall system model was implemented with MATLAB/Simulink. The proposed control technique is compared with Vector Control (VC) method. The effectiveness of the proposed control approach has been evaluated under various operating regimes of the ENCWF system and with three-phase to ground fault. The simulation results show a good performance of the proposed Backstepping strategy.