New current injection method to eliminate harmonics in AC power systems

A new method is proposed to eliminate ac harmonic currents by injection of harmonic compensating current, which principally differs from the filtering method. Some important factors in designing this method are investigated mainly from the point of view of the steady-state characteristics.;This method will make possible a large amount of elimination of characteristic and noncharacteristic harmonic currents and may be expected to contribute to the cost reduction in ac systems. The application of this method is not limited to specific loads. The arrangement of the circuit depends on the type of the load.;This thesis describes a system involving a hardware interface, a PC, and advanced software to measure, analyze, and report the condition of harmonics on the power system.