f A Novel Open-Circuit Fault-Tolerant MMC with Multi-carrier PWM Techniques for Solar PV Applications
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Research Article |

A Novel Open-Circuit Fault-Tolerant MMC with Multi-carrier PWM Techniques for Solar PV Applications

Author(s): K. Mary Madhuri*, M. Latha, P. Maheswara Rao, Chevala Venkataramana, B.V. Sai Thrinath and Syed Rubeena Bi

Published In : International Journal of Electrical and Electronics Research (IJEER)        Volume 12, Issue 3

Publisher : FOREX Publication

Published : 25 July 2024

e-ISSN : 2347-470X

Page(s) : 762-768

DOI: https://doi.org/10.37391/IJEER.120306

Abstract

Modular multilevel converters (MMC) have attracted much interest from researchers worldwide. It is a desirable solution due to important features such as modularity, low harmonic content at high output voltages, avoiding large capacitors and separate DC sources, easy scaling to any voltage level, and reduced voltage stress on switches, as well as being suitable for high and medium power applications, such as HVDC and motor drives. High-voltage applications require a cascade of hundreds of sub-modules. Depending on the type of sub-module selected for the application, the sub-module of the MMC may contain several switches. Depending on the MMC-based application, the converter typically needs to operate for a long period, two or three years, without interruption. MMCs can experience many electrical problems, including single line-to-ground faults, DC-bus short circuit faults, switch open circuit faults, and short circuits. A malfunction like this can damage the MMC and cause the system voltage to drop. Therefore, a robust fault-tolerant technique needs to be developed. Any fault-tolerant method can be divided into three phases: fault detection and localization, fault bypass mechanisms, and post-fault control. A major emphasis of this work is post-fault control measures to restore pre-fault voltage levels quickly. Our research has the potential to be applied in various high and medium power applications, such as HVDC and motor drives, where the reliability and performance of the power conversion system are crucial.

Keywords: Fault detection, Modular Multilevel converter, Phase Opposition Disposition, Total harmonic Distortion, Photovoltaic.




K. Mary Madhuri*, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, India; Email: marymadhuri0@gmail.com

M. Latha, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, India

P. Maheswara Rao, Department of Electrical and Electronics Engineering, Vignan’s Institute of Information Technology, Visakhapatnam, Andhra Pradesh, India-530 049

Chevala Venkataramana, Assistant Professor, Department of Electrical and Electronics Engineering, JNTU-GV College of Engineering, Vizianagaram, Andhra Pradesh, India-535 003

B.V. Sai Thrinath, Assistant Professor, Department of EEE, School of Engineering, Mohan Babu University, Tirupati, India-517102

Syed Rubeena Bi, Assistant Professor, Electrical & Electronics Engineering, Annamacharya Institute of Technology and Sciences, Rajampet -516126

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K. Mary Madhuri, M. Latha, P. Maheswara Rao, Ch. Venkataramana, B.V. Sai Thrinath and Syed Rubeena Bi (2024), A Novel Open-Circuit Fault-Tolerant MMC with Multi-carrier PWM Techniques for Solar PV Applications. IJEER 12(3), 762-768. DOI: 10.37391/IJEER.120306.