Power quality issues have become more severe than in the past due to the dynamic and complex nature of modern power systems, largely as a result of increased reliability and cost effectiveness standards and the rapid intervention of power electronics in electrical Loads. This has led to the development of devices that offer greater flexibility and adaptability in their operation. This study presented a model based on the Voltage Source Converter (VSC) principle for improving voltage sags/swells, harmonic distortion, and poor power factor using a Distribution Static Compensator. TD-STATCOM (distribution static compensator) is represented as one from FACTS devices used in power system as power electronic shunt device that absorbs and provides reactive power to solve power quality problems in power distribution systems. This paper represents simulation of IEEE 15 bus test system with using the sensitivity index is the effective method for optimal location of D-STATCOM in the test system. D-STATCOM controller is achieved by PI controller and used to mitigate voltage sag under various conditions such as: load increasing, decreasing, line outage and single line to ground fault (SLG) using MATLAB R2014a simulink tool box.
Key words: Power quality, Voltage Source Converter, MATLAB Simulink.
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