Power quality improvement using multi-level inverter as STATCOM

This paper, identifies a problem associated with the grid in order to supply power without any impurity and their solutions, particularly in terms of compensating the reactive power. The deviation in the system is computed and it is compensated using a STATCOM. Here the STATCOM is a five level cascaded H-bridge inverter controlled using level shift PWM technique modelled for three phase system. The control of reactive power maintaining the voltage and current waveform of the system as per the standard is done using d-q reference frame. The STATCOM's operations and performance for compensation of reactive power (VAR) are validated by simulation studies using MATLAB/SIMULINK software which confirms the theoretical predictions.