Wind turbine comprising an electric generator, a frequency converter and a generator-side converter controller, - wherein the frequency converter is configured to interface electric power, which is generated by the wind turbine, between the electric generator and an external power grid, - wherein the frequency converter comprises a generator-side converter unit, which is coupled to the electric generator, a grid-side converter unit, which is coupled to the external power grid, and a direct current link, which connects the generator-side converter unit with the grid-side converter unit, - wherein the generator-side converter controller is coupled to the generator-side converter unit, - wherein the generator-side converter controller is configured to supply converter control signals to the generator-side converter unit to reduce acoustic noise, which is generated by the electric generator, - wherein the generator-side converter controller comprises a current controller, - wherein the current controller comprises a) a fundamental current controller configured for providing fundamental voltage commands (Vd1, Vql), b) at least one harmonic current reference calculation unit for calculating at least one harmonic current reference (Ialphanref, Ibetanref) for reducing noise and vibration of the electric generator, c) at least one harmonic current controller configured for using the harmonic current reference (Ialphanref, Ibetanref) and feedback generator current signals (Ia, Ib, Ic) from the electric generator to obtain harmonic voltage commands (Vdnh, Vqnh), and d) summation elements (1, 2) configured for adding the fundamental voltage commands (Vd1, Vq1) and the harmonic voltage commands (Vdnh, Vqnh) to obtain the converter control signals, and - wherein the current controller is configured such that a harmonic current error (Ialphanerr, Ibetanerr), which is defined by the difference between the feedback generator current signals (Ialpha, Ibeta) and the harmonic current reference (Ialphanref, Ibetanref), is minimized, characterized in that the harmonic current error (Ialphanerr, Ibetanerr) is determined in a stationary alpha-beta frame. - wherein the frequency converter is configured to interface electric power, which is generated by the wind turbine, between the electric generator and an external power grid, - wherein the frequency converter comprises a generator-side converter unit, which is coupled to the electric generator, a grid-side converter unit, which is coupled to the external power grid, and a direct current link, which connects the generator-side converter unit with the grid-side converter unit, - wherein the generator-side converter controller is coupled to the generator-side converter unit, - wherein the generator-side converter controller is configured to supply converter control signals to the generator-side converter unit to reduce acoustic noise, which is generated by the electric generator, - wherein the generator-side converter controller comprises a current controller, - wherein the current controller comprises a) a fundamental current controller configured for providing fundamental voltage commands (Vd1, Vql), b) at least one harmonic current reference calculation unit for calculating at least one harmonic current reference (Ialphanref, Ibetanref) for reducing noise and vibration of the electric generator, c) at least one harmonic current controller configured for using the harmonic current reference (Ialphanref, Ibetanref) and feedback generator current signals (Ia, Ib, Ic) from the electric generator to obtain harmonic voltage commands (Vdnh, Vqnh), and d) summation elements (1, 2) configured for adding the fundamental voltage commands (Vd1, Vq1) and the harmonic voltage commands (Vdnh, Vqnh) to obtain the converter control signals, and a) a fundamental current controller configured for providing fundamental voltage commands (Vd1, Vql), b) at least one harmonic current reference calculation unit for calculating at least one harmonic current reference (Ialphanref, Ibetanref) for reducing noise and vibration of the electric generator, c) at least one harmonic current controller configured for using the harmonic current reference (Ialphanref, Ibetanref) and feedback generator current signals (Ia, Ib, Ic) from the electric generator to obtain harmonic voltage commands (Vdnh, Vqnh), and d) summation elements (1, 2) configured for adding the fundamental voltage commands (Vd1, Vq1) and the harmonic voltage commands (Vdnh, Vqnh) to obtain the converter control signals, and - wherein the current controller is configured such that a harmonic current error (Ialphanerr, Ibetanerr), which is defined by the difference between the feedback generator current signals (Ialpha, Ibeta) and the harmonic current reference (Ialphanref, Ibetanref), is minimized,