INTELLIGENT CONTROL ALGORITHMS FOR DSTATCOM AND ITS APPLICATIONS

Abstract

Power quality in power distribution systems has been the topic of much research with the significant benefits and advancements in the applications of power electronics at utility appliances due to its compactness; energy efficient and reliability. In a three phase distribution system, all possible situations are included, which deviate the quality of waveform of voltage or current at the point of common coupling (PCC) from the sinusoidal waveform with amplitude corresponding to the rated root mean square (RMS) value at rated frequency for all three phases have been included. This lures to a decrease of power transfer and a poor power factor. However, distribution systems do not behave in an ideal power quality limit. The systems react dynamically to changes in active and reactive powers, influencing the magnitude of the voltage and power factor of the distribution systems. Quite often, it gives rise to a myriad of losses and operational problems; the power distribution operator has to intervene to try to achieve power redistribution with good quality. The distribution static compensator (DSTATCOM) is one of the custom power devices used to enhance the quality and reliability of power delivered to customers. The functions of DSTATCOM solely depend on developed control algorithms. The developed intelligent control algorithms for the DSTATCOM open up new opportunities for controlling and enhancing power quality without and as well as with integrated renewable sources in power distribution systems. The opportunities arise through the ability of DSTATCOM to control the interrelated parameters that govern the operation of harmonics elimination, load balancing, voltage regulation and power factor improvement.The DSTATCOM integrated distribution system is effectively examined and investigations have been made to mitigate the power quality issues under balanced and unbalanced loads.