Digital simulation of a statcom based on twelve pulse VSC for voltage control application in power system

The Static Synchronous Compensator (STATCOM) using GTOS and Square-wave Voltage Source Converter (VSC), is one of the recent FACTS device used for static shunt reactive power compensation in high power (Several hundreds of MVARs) application. Improving the system's reactive power handling capacity is a remedy to prevent voltage instability. The VSI is extremely fast in response to reactive power change. Astate-space representation on a d-q framework is presented here and twelvepulse VSC based STATCOM is simulated (for harmonic reduction on theAC side) here by MATLAB and the results are presented. It is found that these controllers can increase the loadability margin of power systems.