A system for controlling a grid connected power generating system (90) is provided. The system includes a wind turbine (42, 12), a converter (14, 16), a first controller (18) and a second controller (154). The wind turbine supplies electrical power to a power grid (22) and the converter (14, 16) couples the wind turbine to the power grid. The first controller (18) calculates voltage commands to emulate a phasor back electromotive force behind an inductance. The controller further generates converter switching commands from the voltage commands. The voltage commands include a voltage magnitude reference and an internal frequency reference calculated from a power imbalance between an active power reference and the electrical power. The second controller is used to limit a converter current.