Seven level multilevel inverter with reduced number of switches configured with boost converters for standalone PV systems

Multilevel inverters (MLI) are designed to handle the medium voltage and high-power requirements of industrial plants or power systems. The traditional structure of the MLI topologies necessities additional switches and limits its wide range of use. This research describes the work done on a single-...

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Bibliographic Details
Main Authors: Mhmood, Ali Akbar Khaleel, Jumaa, Fadhel A.
Format: Conference Proceeding
Language:English
Subjects:
Arrays
Electric potential
Electric power systems
Fuzzy control
Fuzzy logic
Harmonic distortion
Industrial plants
Inverters
Irradiance
Maximum power tracking
Photovoltaic cells
Pulse duration modulation
Switches
Topology
Voltage
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Summary:Multilevel inverters (MLI) are designed to handle the medium voltage and high-power requirements of industrial plants or power systems. The traditional structure of the MLI topologies necessities additional switches and limits its wide range of use. This research describes the work done on a single-phase 7-level MLI with a reduced number of switches (RSMLI) topology used in a standalone photovoltaic (PV) system. The proposed RSMLI structure integration with three individual PV arrays controlled by fuzzy logic maximum power point tracking (FL-MPPT) technique and three boost converters instead of a separate direct-current (DC) source. The proposed MLI uses a smaller number of controlled switches, a lower number of PV arrays, and fewer diodes. Furthermore, a simple unipolar Phase Disposition Pulse Width (PD PWM) Modulation technique was used instead of the conventional high-cost bipolar PWM technique. The performance of the proposed inverter was tested under different solar irradiance levels and load conditions in the simulation using Matlab/Simulink. The results show that the proposed seven-switches MLI presents a 7-level at the output, and it offers good total harmonic distortion (THD) content in the output voltage where a THD value of 18.17% was obtained without filter
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0154736