IMPROVED LOW VOLTAGE RIDE-THROUGH SCHEME FOR PMSG-BASED WIND ENERGY CONVERSION SYSTEMS

Abstract

This paper proposes a low-voltage ride-through (LVRT) scheme for the permanent magnet synchronous generator (PMSG) wind turbine system during the grid voltage sags. At the generator-side, the DC-link voltage controller is designed, based on particle swarm optimizaion (PSO). Meanwhile, at the line-side, the grid active power are regulated for a maximum power point tracking (MPPT) and  the reactive power is controlled for the grid support through the reactive current control. The validity of this scheme has been verified by the simulation of the 2 MW-PMSG wind turbine system.