Comparison Between the Most Popular Structures of Multilevel Inverters and the Packed U Cell Structure

Hakim Kadri, Abdelhalim TLEMCANI, Noureddine HENINI

Abstract


the work compares three important topologies of multilevel inverters: diode-clamped inverters, flying capacitors, and cascaded H-bridge inverters. The comparison is based on parameters such as total harmonic distortion (THD) and electromagnetic interference (EMI) outputs, to carry out this comparison, simulations of these inverters are performed using MATLAB/Simulink. The simulations are conducted for three different configurations: three-level single phase, three-level three phases, and five-level three-phase inverters. The simulation results obtained from MATLAB/Simulink serve as a basis for comparing the performance of these multilevel inverters. In addition to the comparative analysis of existing topologies, the work introduces a new structure called "packed u-cell 5" in MATLAB/Simulink. The performance of this new structure is evaluated by analyzing its THD characteristics. Furthermore, the work aims to improve the THD performance of the "packed u-cell 5" structure by implementing PID (Proportional-Integral-Derivative) control. The PID control technique is applied to reduce the THD generated by the inverter, thereby enhancing its overall performance. Overall, the work involves a comprehensive study of various multilevel inverter topologies, comparing their THD and EMI outputs through simulations in MATLAB/Simulink. Additionally, it presents a novel structure, evaluates its THD performance, and explores the application of PID control to enhance its performance further.


Keywords


PID control, total harmonic distortion, electromagnetic interference, packed u cell inverter.

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References


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DOI (PDF): https://doi.org/10.20508/ijsmartgrid.v7i3.303.g298

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