A Novel Reference Current Generation Algorithm for Harmonic and Reactive Power Compensation in Non Ideal Three-phase Systems

Modern power system networks use active power filters for compensation of harmonic currents generated by non linear loads. In this paper a new method for generating reference currents for harmonic and reactive power compensation is proposed. The proposed method has the advantage that it generates the reference currents irrespective of the supply voltage and load conditions. So the source has to deliver only fundamental positive sequence active component of the load current even when the source voltage is distorted or unbalanced. This method also ensures that the source currents after compensation are balanced and at unity power factor. Simulation results and the comparative evaluation for different load and supply voltage conditions presented in this paper confirm the validity and practicability of the proposed method.