EFFICIENT AND ADAPTIVE POWER SYSTEM HARMONICS CONTROL

Power system harmonics have been known to exist on the power system for a long time. Today, with the introduction of new nonlinear loads, it is clear that power harmonics are becoming a serious and a challenging problem with the potential for damaging effects to both the consumer loads and the power system network.;The second chapter introduces a new adaptive harmonic cancellation approach. The analysis of the proposed approach is presented along with SPICE model results for this approach as applied to cancel one of the harmonics generated from a six-pulse, phase-controlled converter. The validity of this approach with regard to changes in different system parameters is studied.;The third chapter introduces new efficient approaches for harmonic reduction. Beside the main goal of harmonic reduction, these approaches minimize expensive electric energy losses. The results of SPICE models establishes the usefulness of these approaches.;The first chapter in this dissertation examines the major sources of power system harmonics. This chapter also examines some of the available methods to reduce power system harmonics.