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. Th e effect of attenuation on reducing the net current harmonics is reported f or different nonlinear loads. Calculation of nonlinear load susceptances at different harmonic frequencies is presented. The design procedure of a rea ctance one-port compensator capable of reducing the voltage and current har monics produced by nonlinear loads supplied from a source having internal i nductive impedance is offered. The reactance one-port compensator applicati on to a secondary distribution system loaded with different load types is p resented. The analysis uses the electromagnetic transient program (EMTP) to model different loads as well as the distribution system. Finally, physica l experiments have been conducted to verify the results obtained by simulat ion.