Self-Balanced Twenty Five Level Switched Capacitor Multilevel Inverter With Reduced Switch Count and Voltage Boosting Capability

Murshid, Shadab; Tayyab, Mohammad; Sarwar, Adil; Tariq, Mohammad; Al‐Durra, Ahmed; Tomar, Anuradha

doi:10.1109/tia.2021.3136802

Cited by 23 publications

(10 citation statements)

References 22 publications

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“…By integrating the basic unipolar SC units/generalized SCCs into other types of multiple-input-dc-source MLIs, many new topologies of SC-MLIs with different circuit characteristics have been widely investigated [5]. In this regard, six other notable topologies of double-port-based SC-MLIs presented in [79], [81], [83], [84], [85], and [89] are illustrated in Fig. 28(a)-(f), respectively.…”

Section: B Multiple Dc-source Sc-mlismentioning

confidence: 99%

See 1 more Smart Citation

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

123

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Multilevel inverters (MLIs) with switched-capacitor (SC) units have been a widely rehearsed research topic in power electronics since the last decade. Inductorless/transformerless operation with voltage-boosting feature and inherent capacitor self-voltage balancing performance with a reduced electromagnetic interference make the SC-MLI an attractive converter over the other available counterparts for various applications. There have been many developed SC-MLI structures recently put forward, where different basic switching techniques are used to generate multiple (discrete) output voltage levels. In general, the priority of the topological development is motivated by the number of output voltage levels, overall voltage gain, and full dc-link voltage utilization, while reducing the component counts and stress on devices for better efficiency and power density. To facilitate the direction of future research in SC-MLIs, this article presents a comprehensive review, critical analysis, and categorization of the existing topologies. Common fundamental units are generalized and summarized with their merits and demerits. Ultimately, major challenges and research directions are outlined leading to the future technology roadmap for more practical applications.

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Section: B Multiple Dc-source Sc-mlismentioning

confidence: 99%

“…Finally, the last structure from the double-port SC-MLIs family is a 25-level (25L) inverter shown in Fig. 28(f) [89]. As can be seen, the topology is constructed based on two integrated SPSC Units-I with two asymmetric input dc sources and 12 power switches.…”

Section: B Multiple Dc-source Sc-mlismentioning

confidence: 99%

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

123

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“…NLC is used here to control the switches in order to obtain the desired output waveform. 25 A sampled waveform is generated by comparing the reference sinusoidal waveform and the desired output waveform. This sampled waveform is then rounded off to the nearest level and compared according to the switching logic to produce switching signals for the IGBTs.…”

Section: Nearest Level Controlmentioning

confidence: 99%

“…Among them, nearest level control (NLC) and selective harmonic elimination (SHE) have been widely accepted and used fundamental switching frequency‐based control techniques due to reduced switching losses and lesser complexity. NLC is used here to control the switches in order to obtain the desired output waveform 25 . A sampled waveform is generated by comparing the reference sinusoidal waveform and the desired output waveform.…”

Section: Proposed Switched‐capacitor Topology and Its Operationmentioning

confidence: 99%

A novel voltage boosting switched‐capacitor 19‐level inverter with reduced component count

Tayyab

Sarwar

Hussan

et al. 2022

Circuit Theory & Apps

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A dual‐source switched‐capacitor multilevel inverter (SCMLI) topology utilizing 13 switches, one diode, and two switched capacitors is presented in this paper. The proposed topology is capable of operating in both asymmetrical and symmetrical modes. In asymmetrical mode, it produces 19‐level output voltage, whereas, in symmetrical mode, it produces 13‐level output voltage. The capacitor voltages are self‐balanced in the presented SCMLI topology. A detailed comparative analysis has been carried to show the advantages of the proposed topology in terms of the number of switches, number of capacitors, number of sources, and boosting of the converter with the recently published multilevel inverter topologies. The nearest level control (NLC)‐based algorithm is used for generating switching signals for the IGBTs present in the circuit. The reliability assessment is carried to assess the life span of the proposed SCMLI. Experimental results are obtained for different loading conditions using a laboratory hardware prototype. The fluke‐based power analyzer is used to record the inverter voltage and corresponding THD values at different modulation indexes. The efficiency of the proposed inverter is 97.35% for 200‐W load.

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“…With the increase in the number of levels, the harmonic content reduces in the output voltage. To utilize the benefits of higher voltage levels as mentioned above, authors in [16] have proposed a nineteen‐level inverter and a twenty‐five level inverter is presented in [17].…”

Section: Introductionmentioning

confidence: 99%

Grid‐connected operation and control of single‐phase asymmetrical multilevel inverter for distributed power generation

Tayyab

Sarwar

Murshid

et al. 2022

IET Renewable Power Gen

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In recent times, multilevel inverters (MLIs) are gaining popularity for grid integration of distributed power generation sources. In this paper, a proportional‐resonant (PR) controller based on current control logic is proposed for a single‐phase eleven‐level inverter topology, enabling the integration of distributed power generation sources into the grid. The presented topology utilizes eight two‐quadrant switches and three dc sources to produce an eleven‐level output voltage. The level‐shifted pulse width modulation (LS‐PWM) scheme is used for providing switching signals to the inverter under grid‐connected operation. Simulation and real‐time results are presented for the eleven‐level inverter to validate the presented current control logic under the grid‐connected mode of operation. The hardware‐in‐loop emulator (Typhoon HIL‐402) is used for taking real‐time results of the presented grid‐connected topology. The total harmonic distortion (THD) of the eleven‐level inverter voltage and grid current is 12.10% and 0.46%, respectively. The efficiency of the inverter while supplying 2 kW active power to the grid is 98.4%.

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Self-Balanced Twenty Five Level Switched Capacitor Multilevel Inverter With Reduced Switch Count and Voltage Boosting Capability

Cited by 23 publications

References 22 publications

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

A novel voltage boosting switched‐capacitor 19‐level inverter with reduced component count

Grid‐connected operation and control of single‐phase asymmetrical multilevel inverter for distributed power generation

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