Investigation on power quality improvement in distribution system using intelligent control techniques

Abstract

In general, loads in the power system are categorized as residential, newlinecommercial and industrial loads. Heating and lighting loads forms a large newlineproportion of residential and commercial loads .The active power consumed by newlineheating and lighting load varies in proportion to the voltage magnitude and newlineindependent of frequency, consuming negligibly small reactive power. newlineComposite loads form the large part of the industrial loads, which mainly newlineconsists of induction motors. As the composite loads vary with voltage newlinemagnitude and frequency, the induction motors will experience increased load newlinewith increase in the frequency or speed. newlineIndustrial units are more conscious on the direct charges associated newlineto the consumption of energy of their equipment, machineries and processes as newlineit is indicated on their electricity charges. Nevertheless, the indirect charges newlinerelated to energy loss due to poor power quality and supply voltage quality, as newlinean adverse effect of harmonics is also noteworthy. The effect of harmonics newlineleading to low power factor, replacing costly equipment, repairing costs of newlineequipment and unpredicted interruptions leading to production increases the newlineindirect charges. In line to the above mentioned reasons, numerous industrial newlinesegments extended the awareness in the harmonics. The availability of newlineequipment can be increased due to less downtime costs by proper detection and newlinemitigation of harmonics and also sustainable power factor improvement can be newlineobtained which increases the reliability of the system. newlineIn modern electrical power distribution systems, the applications of newlinepower electronics devices are rapidly increasing. Due to the nonlinear newlinecharacteristics of the power electronic devices newline