DESIGN AND HARDWARE IMPLEMENTATION OF MULTILEVEL INVERTER
Date
2023-04
Authors
Sah, Bharat Kumar
Thakur, Chandan
Goswami, Sagar
Kadel, Ujjwal
Journal Title
Journal ISSN
Volume Title
Publisher
I.O.E. Pulchowk Campus
Abstract
An inverter is utilized to transform a DC source into an AC source using power electronic
components. It can be achieved using two types of inverters, one is two level inverter and
another is multilevel inverter (MLI). MLI has been implemented in various applications, such
as motor drives, power conditioning devices, renewable energy generation and distribution.
PWM inverters can simultaneously control output voltage, frequency and it can reduce the THD
content in output waveform.
This project aims in the study of different MLI topologies, primarily focused in the study of
Cascaded H bridge (CHB) and Switched Capacitor MLI (SCMLI). Several multilevel topologies
have been developed, but as the output voltage level increases, it also increases the number of
switches, switching stresses, losses and voltage unbalancing across the capacitors, etc. CHBMLI
is more efficient compare to the other topologies of multilevel inverter but not as efficient as
Switched Capacitor MLI. SCMLIs are the most widely used because of self-voltage balancing
and voltage boosting over conventional ones with reduced number of DC sources.
Description
This project contributes to the advancement of MLI technology by presenting
comprehensive simulation studies and practical hardware implementations of different MLIs.
The findings can guide future researchers in selecting the most suitable MLI topology for
specific power conversions considering factors like complexity, THD and cost-effectiveness.
Keywords
Multilevel inverter (MLI),, multilevel inverter (MLI),, Switched Capacitor MLI (SCMLI).