A new multilevel inverter topology based on switched-capacitor technique

Kakar, Saifullah; Ayob, Shahrin Md.; Arif, Muhammad; Nordin, Norazah; Daud, Zul Hilmi Che; Ayop, Razman

doi:10.11591/ijpeds.v12.i1.pp627-636

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…The PV panels are considered as DC sources that should be connected to a Z-source converter before connecting to the inverter. It is pertinent to mention that some multilevel topologies claim less number of components at the expense of more complex control strategies or issues such as capacitor balancing [22].…”

Section: Basic Building Blocks 21 Rv Multilevel Invertermentioning

confidence: 99%

Z-source reversing voltage multilevel inverter for photovoltaic applications with inherent voltage balancing

Najafi

Rashidi

Dehghan

2022

IJPEDS

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Photovoltaic (PV) inverters have been widely used in solar energy to change the direct current (DC) voltage of PV panels to the grid alternating current (AC) voltage. They are comprised of DC-DC section for maximum power point tracking (MPPT) and DC-AC part to provide required output AC voltage. This paper provides a unique configuration that integrates both sections in one part. A Z-source multilevel inverter is proposed based on Z-source networks and reversing voltage (RV) multilevel inverter. The Z-source network can be used to increase the level of the input voltages and MPPT as well. In addition, the prop used topology uses multilevel topology to accommodate more DC inputs and benefit from features of multilevel level inverters in AC output. Moreover, using Z-source network can minimize equated monthly installment (EMI) due to the lower stress on the semiconductor switches. Finally, a seven level topology is designed and simulated to show the performance of proposed topology.

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Section: Basic Building Blocks 21 Rv Multilevel Invertermentioning

confidence: 99%

Z-source reversing voltage multilevel inverter for photovoltaic applications with inherent voltage balancing

Najafi

Rashidi

Dehghan

2022

IJPEDS

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“…A wide range of industrial applications have benefited from the development of multilevel inverters (MLIs) in recent years [6], [7] including active power filtering, motor drive applications, distributed generation systems, FACTS applications, UPS systems, induction heating applications, and many more [8], [9]. MLIs have several advantages over traditional two-level inverters, including lower total harmonic distortion (THD), reduced voltage stress in power switches, output filters are smaller, and immunity to electromagnetic interference [10], [11].…”

Section: Introductionmentioning

confidence: 99%

A new flying capacitor multilevel converter topology with reduction of power electronic components

Ahmed

Hassan

Saleh

2023

IJPEDS

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High power capacity and reliability are characteristics of multilevel inverters. The using a collection of DC sources can produce a terminal voltage that is very close to sinusoidal. The power quality can be improved by adding more levels, but this makes the control system more complicated and expensive. The number of power components in a multilevel inverter has been studied for decades. So, research needs to be done on multilevel inverter configurations to find ways to add levels with fewer power switches than with traditional topologies and those that have already been proposed. In this research, a new power-efficient arrangement of a flying-capacitor inverter is introduced. In order to illustrate the suggested topology, a seven-level multilevel inverter is constructed and demonstrated in a simplified form. Fewer power components, including power switches, capacitors, and gate driver circuits, are required in this topology than in other topologies described in the recent literature, which is one of its main advantages. The improvement mentioned above can be seen in the way this topology works, which is shown by the characteristics of the circuit. MATLAB/Simulink R2021a is used to simulate and verify the circuit to ensure the proposed topology is correct.

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“…MLIs play a vital role in power conversion suitable for different applications owing to their promising features such as high efficiency and power density. In contrast to the classical twolevel inverter, their main features are higher modularity and scalability, excellent output waveform quality, appropriate power density, and suitable cost (Kakar et al, 2021a;Kakar et al, 2021b;Iqbal et al, 2021). However, the major concerns of MLIs are the high component count and the buck-type feature of the ac output voltage when used for grid-connected renewable energy-based sources such as solar PV panels.…”

Section: Introductionmentioning

confidence: 99%

An improved seven-level switched-capacitor-based neutral-point clamped inverter

et al. 2022

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Multilevel inverters (MLIs) have seen significant growth in a variety of medium- to high-power industrial applications and have become a mature and viable solution for renewable energy systems over the past decade. The major concerns of MLIs are the high component count and the buck-type feature of the ac output voltage when used for grid-connected renewable-energy-based sources such as solar photovoltaic (PV) panels. As another option, a switched-capacitor (SC)-based inverter possessing the feature of boost ability is a prime solution to meet the requirements of ac power applications. Integrating an SC network with a neutral-point clamped (NPC) structure makes leakage current alleviation viable for transformerless PV grid-connected systems. In this article, an improved SCMLI based on the NPC structure is proposed to reduce the number of active switches and the number of switches in the charging loop, significantly reducing the power loss. It can generate seven voltage levels with voltage boosting and self-balancing of capacitors within a single-stage power conversion. The working principle of the proposed topology, circuit description, and control technique are presented. Further, the proposed inverter was compared with other recent SC topologies to show its superiority. In the end, a laboratory prototype was developed and tested for the seven-level module under steady-state and dynamic conditions to validate the practical viability of the proposed configuration. The proposed inverter’s maximum efficiency was 97.5% at 1.2 kW rated power.

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A new multilevel inverter topology based on switched-capacitor technique

Cited by 4 publications

References 11 publications

Z-source reversing voltage multilevel inverter for photovoltaic applications with inherent voltage balancing

Z-source reversing voltage multilevel inverter for photovoltaic applications with inherent voltage balancing

A new flying capacitor multilevel converter topology with reduction of power electronic components

An improved seven-level switched-capacitor-based neutral-point clamped inverter

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