Application of D-STATCOM for power quality improvement in distribution line

This paper discusses the improvement in power quality of distribution line using a distribution FACTS device known as Distribution Static Compensator (D-STATCOM). The major power quality issues like voltage sag and harmonics are addressed in this paper. The intermittent switching of heavy non-linear loads results in voltage sag and harmonics in distribution line. The critical loads connected to this distribution line are adversely affected by voltage sag and harmonics. In this paper, Unit Template Algorithm is used for reference current generation, which is a simple method for implementation and control compared to other methods. The line parameters of 415 volt industrial feeder connected with non-linear loads are considered for analysis. The distribution line and DSTATCOM are modeled using MATLAB-SIMULINK software. The effectiveness of unit template algorithm for power quality improvement is proved by comparing results of Simulink model with and without DSTATCOM.