Mitigation of voltage swell and sag using D-STATCOM
Keywords:
D-STATCOM, Total harmonics Distortion (THD, Voltage Sag/swell, Voltage Source Converter (VSC)Abstract
A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results
in a failure or a mis-operation of end user equipments. Utility distribution networks, sensitive industrial loads and critical
commercial operations suffer from various types of outages and service interruptions which can cost significant financial
losses. 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. In developing countries like India, where the variation of power
frequency and many such other determinants of power quality are themselves a serious question, it is very vital to take
positive steps in this direction. The present work is to identify the prominent concerns in this area and hence the measures
that can enhance the quality of the power are recommended.
This paper presents the enhancement of voltage sags/swell; harmonic distortion and low power factor using Distribution
Static Compensator (D-STATCOM). The model is based on the Voltage Source Converter (VSC) principle. The DSTATCOM injects a current into the system to mitigate the voltage sags/swell. to improve harmonic distortion and low
power factor. The simulations were performed using MATLAB SIMULINK version R2009b.
