Investigations on the Role of Dstatcom for Power Quality Improvement in Distribution Networks

Abstract

In 20th century the expansion of power system and electronic devices has been grown at very fast rate. The most noticeable topic for electrical engineer is Power Quality in recent years. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or a misoperation of end user equipments. With Power quality problem utility distribution networks, industrial loads, sensitive loads etc. are suffered. With the restructuring of power systems and with shifting trend towards distributed and dispersed generation, the issue of power quality is going to take newer dimensions. To overcome the problem related to power quality Custom power devices are introduced. A number of power quality solutions are provided by Custom power devices. At present, a wide range of very flexible controllers, which capitalize on newly available power electronics components, are emerging for custom power applications .Among these, the distribution static compensator is use in the present work. The fast response of the Distribution Static Compensator (DSTATCOM) makes it the efficient solution for improving power quality in distribution systems. DSTATCOM can use with different types of controllers. The device consider in this work is Distribution Static Synchronous Compensator (DSTATCOM) with PI controller to improve the of power quality under different abnormal conditions like single line to ground fault, double line to ground fault in distribution networks with static linear and static non- linear loads.