Integration of Multiple Inverters and Filters to Form a 15-level Cascaded Multilevel Inverter (CMLI)

This is the second phase of the project of development of a CMLI. Previously, multiple Inverter circuits were implemented and tested and a couple of them were cascaded to form a 5-level CMLI. It was observed that switching noise is a major issue in cascading multiple stages and require properly designed filters between the stages and at the output. The objective of this project is to extend the work on CMLIs to integrate up to 7 stages to form a 15-level CMLI with filters between the cascaded stages and output filters to suppress switching noise. Moreover, THD analysis will be performed.               

• Understanding the problem and identifying issues to be resolved
• Getting familiar with already developed hardware
• Design of filters to integrate multiple stages of a CMLI
• Implementation of required filters
• Integrating a 15-level CMLI
• THD analysis against the switching angle control
• Demonstration   of   4kVA   power   output   with   THD minimization and control over modulation index
• Thesis Writing