Passive filter design for harmonic reactive power compensation in single-phase circuits supplying nonlinear loads

The proliferation of different types of nonlinear loads into a distribution system has the potential to increase the harmonic levels in the system. The effect of attenuation on reducing the net current harmonics is reported for different nonlinear loads. Calculation of nonlinear load susceptances at different harmonic frequencies is presented. The design procedure of a reactance one-port compensator capable of reducing the voltage and current harmonics produced by nonlinear loads supplied from a source having internal inductive impedance is offered. The reactance one-port compensator application to a secondary distribution system loaded with different load types is presented. The analysis uses the Electromagnetic Transient Program (EMTP) to model different loads as well as the distribution system. Finally, physical experiments have been conducted to verify the results obtained by simulation.