Improvement in Harmonics Compensation of an Add-on Active Power-Line Conditioner for General-Purpose Inverters

This paper deals with an improvement in harmonics compensation of an add-on active power-line conditioner (APLC) for general-purpose inverters. The reference values for the current controller in d-q coordinates are slightly corrected with a simple algorithm. The total harmonic distortion values on the source currents are greatly improved with the proposed reference values correction method. The basic principle of the proposed reference values correction method is discussed in detail. Digital computer simulation is implemented to confirm the validity and high practicability of the proposed method using PSIM software. Simulation results demonstrate that the purely sinusoidal source currents are achieved with the proposed method, satisfying the standard IEC 61000-3-2.