This paper investigates the modeling, simulation and implementation of sensorless maximum power point tracking (MPPT) of permanent magnet synchronous generator wind power system. A comprehensive portfolio of control schemes are discussed and verified by simulations and experiments. Particularly, a PMSG-based wind power emulation system has been developed based on two machine drive setups — one is controlled as wind energy source and operated in torque control mode while the other is controlled as a wind generator and operated in speed control mode to attain MPPT. Both simulation and experimental results demonstrate a robust sensorless MPPT operation in the customized PMSG wind power system.