Use of Stored Energy in Rotor Inertia for LVRT of PMSG Wind turbine based on Sliding Mode Control

영구자석 동기발전기 시스템을 위한 회전자 관성에너지를 이용한 Sliding Mode제어 기반 LVRT 제어

This paper describes a low-voltage ride-through method for the permanent magnet synchronous generator (PMSG) wind turbine system at a grid fault. The generator side converter regulates the DC link voltage instead of the grid side converter by storing the surplus active power in the rotor inertia during grid fault by the sliding mode controller. The grid side converter controls the grid active power keeping a maximum power point tracking. Simulation results for small scale PMSG wind turbine verify the efficiency of the control method.