Comparison of vector-based hysteresis current control schemes for three-phase three wire shunt active power filter

Three space vector (SV) current control schemes for shunt active power filters (SAPF) is introduced in this paper, with a standard two-level VSI. Out of three control schemes, each is compared with the other scheme to evaluate inherent advantages and disadvantages of the control schemes. Name of these three vector base current control schemes are vector base HCC method-I, vector base HCC method-II and vector base HCC method-III. In this paper, harmonic current components as a reference signal is generated by using a real-time fast Fourier transform. Further on base of error signal position, vector base hysteresis current controllers choose switching states from the switching table implemented in a DLL (dynamic link library) block of PSIM software. With the vector base HCC method-III, the total harmonic distortion (THD) of the compensated grid current is significantly reduced. Different Vector base HCC schemes are compared via simulation results based on two-level VSI using PSIM software.