Simulation and Evaluation of a Cascade Multilevel Inverter Using STATCOM Strategy

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Seema Bai Meena, Lokesh Meena

Abstract

The cascade multilevel inverter (CMI) has emerged as a pivotal technology in modern power systems, particularly in applications requiring high power quality and efficient power conversion. This paper presents a comprehensive simulation and evaluation of a cascade multilevel inverter employing a Static Synchronous Compensator (STATCOM) strategy. The STATCOM strategy is integrated with the CMI to enhance voltage stability, mitigate harmonic distortion, and improve reactive power compensation. The simulation is conducted using advanced software tools to model the inverter's performance under various operating conditions, including changes in load and grid disturbances. The study begins with an overview of the cascade multilevel inverter's structure and operating principles, highlighting its advantages over traditional inverter topologies. The integration of the STATCOM strategy is then discussed, detailing how it enhances the inverter's ability to manage reactive power and maintain voltage stability. The simulation setup is meticulously described, including the parameters used for modeling the inverter and the STATCOM, as well as the control algorithms implemented to achieve optimal performance. Results from the simulation demonstrate significant improvements in power quality, with a marked reduction in total harmonic distortion (THD) and enhanced voltage stability across various load conditions. The STATCOM strategy's effectiveness in providing dynamic reactive power support is evident, contributing to the overall stability and reliability of the power system. Comparative analysis with conventional inverter strategies underscores the superior performance of the cascade multilevel inverter with STATCOM integration. This paper concludes with a discussion on the implications of these findings for the future design and implementation of multilevel inverters in power systems. The enhanced performance characteristics of the CMI with STATCOM strategy suggest its potential for widespread adoption in applications such as renewable energy systems, industrial drives, and grid-tied inverters. Future research directions are proposed, focusing on further optimization of control algorithms and exploring the integration of additional functionalities to enhance system resilience and efficiency.

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