Abstract: In this study, high efficient power conditioner system for grid integrated variable-speed wind turbine using an Interior Permanent-Magnet Synchronous Generator (IPMSG) is developed. The grid integrated Power Conditioner System (PCS) consists of phase-shifting transformer which powers series-type 12-pulse uncontrolled diode rectifier which is cascaded to a Pulse Width Modulated (PWM) diode clamped multilevel inverter. The active current of the grid-side PWM multi level inverter is controlled to follow the optimal active current reference. In proposed system the passive filter together with a series-type 12-pulse rectifier suppresses the distortions presented in the IPMSG voltages and currents and increases the efficiency by compensating the power factor angle of the IPMSG. Simulation results proves that the proposed reduces the harmonics and it is high efficient.