A Hybrid Nearest Level Combined With PWM Control Strategy: Analysis and Implementation on Cascaded H-Bridge Multilevel Inverter and its Fault Tolerant Topology

Mohammad Irfan Sarwar; Adil Sarwar; Shoeb Azam Farooqui; Mohd Tariq; Mohammad Fahad; Abdul R. Beig; Basem Alamri

doi:10.1109/ACCESS.2021.3058136

IEEE Access (Jan 2021)

A Hybrid Nearest Level Combined With PWM Control Strategy: Analysis and Implementation on Cascaded H-Bridge Multilevel Inverter and its Fault Tolerant Topology

Mohammad Irfan Sarwar,
Adil Sarwar,
Shoeb Azam Farooqui,
Mohd Tariq,
Mohammad Fahad,
Abdul R. Beig,
Basem Alamri

Affiliations

Mohammad Irfan Sarwar: ORCiD; Department of Electrical Engineering, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh, India
Adil Sarwar: ORCiD; Department of Electrical Engineering, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh, India
Shoeb Azam Farooqui: ORCiD; Department of Electrical Engineering, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh, India
Mohd Tariq: ORCiD; Department of Electrical Engineering, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh, India
Mohammad Fahad: ORCiD; Department of Electrical Engineering, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh, India
Abdul R. Beig: ORCiD; Department of Electrical and Computer Engineering, Advanced Power and Energy Center, Khalifa University, Abu Dhabi, United Arab Emirates
Basem Alamri: ORCiD; Department of Electrical Engineering, College of Engineering, Taif University, Taif, Saudi Arabia

DOI: https://doi.org/10.1109/ACCESS.2021.3058136
Journal volume & issue: Vol. 9
pp. 44266 – 44282

Abstract

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This paper presents a hybrid control strategy which combines the nearest level control technique with PWM control technique on a cascaded H-Bridge Multilevel Inverters (MLI). MLIs have become very popular due to its several advantages in the application areas like industrial drives and grid-connected renewable energy generation systems. With the reduced number of switches, driver circuits, conduction losses, switching losses, voltage stresses, size, and cost of the system, MLI has outperformed its two-level counterpart in terms of power quality issues. Reduction in the Harmonics and consequently the Total Harmonic Distortion (THD) in the output voltage has added to the benefits of MLI. Topological advancements in MLI require a satisfactory output voltage control strategy. In this work, a hybrid control strategy for a smooth and wider range of control of output voltage is proposed. The hybridized scheme enhances the control range of the voltage considerably. Moreover, the THD is also reduced compared to the conventional sinusoidal PWM scheme. A thorough analysis of the scheme has also been presented in the paper. SIMULINK/ MATLAB environment is used for testing the simulation model of the proposed control scheme. This hybridized controlling technique is also simulated for thermal modelling on PLECS software and power loss analysis is performed. The mathematical and simulation analyses are validated on an experimental prototype using a TMS320F28335 DSP controller card. The hybrid scheme has also been tested for a fault tolerant model of the cascaded H-bridge inverter. The performance of the hybrid scheme under different fault condition has also been shown to work satisfactorily.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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