The shunt active power filter has been proved to be a useful means to improve power quality. This paper investigates the utilization of a new control strategy for three-phase three-wire voltage source shunt active power filter. The proposed scheme is composed of a self-tuning fuzzy logic controller and a series of generalized integrators. Self-tuning fuzzy controller, which operates through the error between the dc-link voltage and a reference value, regulates the voltage level of the dc-link and its output is regarded as the amplitude of grid reference current. The PI current controllers using stationary-frame generalized integrators are adopted, which can eliminate the steady state errors and compensate current harmonics selectively. In addition, an improved Fourier analytic approach is proposed to obtain the phase of the grid current reference by analysis of the grid voltage. The feasibility of the proposed scheme is validated by experimental results from a prototype.