Performance Analysis of Z Source Inverter Fed Induction Motor Drive Open Loop System using MATLAB Simulink

A Static Synchronous Compensator (STATCOM) is a type of shunt-connected device under the Flexible AC Transmission System (FACTS) umbrella, designed to manage reactive power in power systems. It operates through a Voltage Source Converter (VSC) equipped with Gate Turn-Off thrusters (GTOs). A primary use of the STATCOM is to stabilize voltage at the center of long transmission lines, thereby improving power transmission capacity and maintaining reactive power balance at the load end. While conventionalProportional-Integral (PI) controllers are commonly used for reactive current regulation, they can induce oscillations and instability, especially when the STATCOM functions in inductive mode.To overcome this limitation, nonlinear feedback control methods offer a more stable alternative.The overall dynamic performance of a STATCOM is highly sensitive to its control parameters, and is typically evaluated through transient simulation analysis.In this work, a STATCOM system based on a two-level inverter is modelled to generate both 18-pulse and 48-pulse waveforms.Of these, the 48-pulse variant yields a higher quality and more efficient output.The project explores the application of both configurations in mitigating different types of shortcircuit faults on transmission lines, followed by a postfault performance comparison to assess their relative effectiveness.