1053

This paper presents a wind storage system composed of permanent magnet synchronous generator (PMSG), Vienna rectifier, battery and three level bidirectional DC-DC. The motivation for this topology is to make the system more reliable, power efficient, cost effective and simple to control. In the control of the wind turbine (WT), proposes a speed loop backstepping control strategy based on Lyapunov stability in the topology of PMSG - VIENNA rectifier. Energy storage system (ESS) adopts three-level bidirectional DC-DC converter based on constant power control. Through the MATLAB/Simulink, it is found that that the backstepping control could quickly track the rotation speed at the maximum power point (MPP) with stable waveform and small fluctuation range, the grid-connected inverter can output stably, and using simulation results validate the performance of proposed topology.