Cost effective harmonic suppression in A. C. power systems

Abstract

The aim of this paper is three parts: First, develop a workable model for specific devices which are known to inject harmonics into power distribution systems. Second, combine this model with the distribution system elements and solve the resulting network to yield harmonic voltages. Third, describe the experimental results for a method of harmonic current reduction thyristor converters. The principle of this method is to modify the current waveforms on the ac windings of a converter transformer by filtering harmonic currents at a particular frequency. In practice, filtering the fifth harmonic current of the power frequency is the most efficient. Experimental results prove that the method is effective in reducing the alternating-current harmonics, and it is applicable to any type of thyristor converters.