Static compensation systems for improving electric power quality

Summary form only given. The supply of electrical energy to loads in industrial plants has some undesirable repercussions on the supply network. Depending upon the type of load and its mode of operation, the reactions are usually a reduction in the power factor, system voltage fluctuations, voltage flicker, unbalanced loading of the three phases and harmonic currents, which in turn affect negatively the electric power quality. The subject of this paper is to study and analyze the main reasons for such undesirable reactions and to find the compensation system required for each reaction to reduce its effect to an acceptable level, such as either switched capacitor banks or high response thyristor controlled reactors. To improve the electric power quality, these systems may be augmented by adding filters for eliminating discrete harmonics or harmonic bands.