Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems

Majumdar, Saikat; Jana, Kartick Chandra; Pal, Pradipta Kumar; Sangwongwanich, Ariya; Blaabjerg, Frede

doi:10.1109/jestpe.2021.3133369

Cited by 34 publications

(17 citation statements)

References 32 publications

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“…Their foremost benefits are increased efficiency, great power density, improved waveform quality, and built-in fault tolerance [5][6][7][8][9][10]. The MLIs are essentially constructed through the integration of switching components and DC sources/capacitors.…”

Section: Introductionmentioning

confidence: 99%

“…This configuration allows the generation of multiple voltage levels while requiring a lower voltage draw from each switch in comparison with the conventional two-level inverter. As illustrated in Figure 2, various MLI topologies have been proposed in the literature [9][10][11][12][13]. These topologies are classified into main categories: transformer-based, and transformer-less Their foremost benefits are increased efficiency, great power density, improved waveform quality, and built-in fault tolerance [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…As illustrated in Figure 2, various MLI topologies have been proposed in the literature [9][10][11][12][13]. These topologies are classified into main categories: transformer-based, and transformer-less Their foremost benefits are increased efficiency, great power density, improved waveform quality, and built-in fault tolerance [5][6][7][8][9][10]. The MLIs are essentially constructed through the integration of switching components and DC sources/capacitors.…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Review on Space Vector Based-PWM Techniques for Common Mode Voltage Mitigation in Photovoltaic Multi-Level Inverters

Ben Mahmoud,

Khedher

2024

Energies

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Nowadays, transformer-less photovoltaic (PV) multi-level inverters (MLIs) are commonly employed in both industrial and residential settings. This structure has attracted increased attention due to its unique advantages, such as higher efficiency, lower cost and size, better waveform quality, and inherent fault tolerance. However, due to the removal of the transformer, the common mode voltage (CMV) becomes one of the crucial issues in transformer-less PV MLIs. The high-frequency variation in CMV results in a leakage current that deteriorates the line current quality, increases the PV power system losses, leads to severe electromagnetic emissions (EMI), reduces the PV array lifespan, and causes personal safety problems. In this regard, this paper presents a review of the existing and recent research on modulation techniques based on space vector pulse width modulation (SVPWMs) that overcome this issue in transformer-less three-level NPC-MLIs (3L-NPC-MLIs). The reduced CMV-SVPWM (RCMV-SVPWM) can be mainly categorized as an RCMV-SVPWM based on the vector type, based on virtual vectors, and based on the two-level SVPWM (2L-SVPWM). Their features and their limitations in terms of several main criteria are discussed. In the final section of this paper, some challenges and future trends for this research area are projected.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Review on Space Vector Based-PWM Techniques for Common Mode Voltage Mitigation in Photovoltaic Multi-Level Inverters

Ben Mahmoud,

Khedher

2024

Energies

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“…Due to the smaller size and smaller weight of the system, high-frequency output can be used to implement circuits in electric vehicles (EVs) [23]. According to [24], various technological challenges are encountered and overcome; the effectiveness of EVs depends on the way energy storage devices are interfaced.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Implementation of Switched Capacitor-based Multi-Level Inverter for Electric Vehicles Applications

Manivel

Kaliappan²

2023

ELEKTRON ELEKTROTECH

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Significant interest has been shown in switched capacitor (SC)-based multi-level inverters (MLIs), which decrease the need for a DC supply and enhance power quality. The common issues with SC-MLIs include an uneven distribution of conducting paths, increased voltage drop across capacitors, the sum of all inverter DC link voltages across the highest voltage rated switches, and a higher total standing voltage (TSV). The purpose of this paper is to create a SC-MLI with less components in order to maintain a constant voltage across the capacitors, to obtain higher voltage gain with fewer parts, fewer conducting routes, lower TSV, and to create a more affordable and effective inverter. The structure of the MLI is created by a cascade interconnection between the number of SC cells. A single input multiple output (SIMO) converter boosts the DC-link voltage over the stable DC voltage of the solar panels using a modified perturb and observe (P&O) method. Additionally, fewer switches in the conduction path and 50 % of the switches operating at normal frequency guarantee a decrease in an overall loss of power in the proposed network. The benefits of the recommended MLI are made clear by comparing them with 17-level MLIs in terms of the number of elements, stress, gain, and cost factor. Detailed experimental results are shown under various transient conditions to show that the 17-level prototype is operationally viable. The total harmonic distortion (THD) is found to be identical and is less than 5 %, which meets IEEE standards.

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“…In order to obtain more steps across MLI output voltage, number of DC sources is needed to increase. Tis drawback has been resolved in some developed models [10][11][12][13][14][15] by connecting series capacitors across a single voltage source. But there is a major concern regarding balancing of DC-link capacitor voltage when the number of series capacitors or storage devices are connected across a single DC source.…”

Section: Introductionmentioning

confidence: 99%

THD Reduction of Improved Single Source MLI Using Upgraded Black Widow Optimization Algorithm

Mohanty,

Chatterjee,

Mohanty

et al. 2023

International Transactions on Electrical Energy Systems

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An upgraded Black Widow Optimization algorithm for obtaining the ideal switching angles of a reduced structure multilevel inverter is proposed in this paper with minimum voltage THD. The conventional BWO algorithm has been modified and proposed to solve the THD minimization problem with faster convergence rate, lesser tuning variables, and lesser number of equations than the other existing nature inspired algorithms. The reduced structure MLI is designed with three asymmetrical DC voltage sources of ratio 1 : 2 : 4 to generate 15-level output voltage which requires reduced number of switching devices in comparison with the existing topologies of equivalent voltage level. The asymmetrical DC voltage sources to the MLI are derived from a single DC voltage source using a multisecondary winding DC-DC converter in order to provide the isolation between the load side and source side. The proposed modified BWO algorithm reduces the complexity of solving the nonlinear equations to achieve the best result by avoiding the local optima. To verify the effectiveness of the upgraded BWO algorithm, the optimization problem for three phase fifteen level MLI has been solved using the genetic algorithm, BFO algorithm, and PSO algorithm. The results for the above three applied algorithms are compared with the upgraded BWO and presented. The proposed algorithm has minimized the output voltage THD to 1.83% at 0.88 modulation index. The developed scheme has been corroborated with the help of MATLAB simulation and the results have been verified through a hardware model developed in laboratory.

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Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems

Cited by 34 publications

References 32 publications

A Comprehensive Review on Space Vector Based-PWM Techniques for Common Mode Voltage Mitigation in Photovoltaic Multi-Level Inverters

A Comprehensive Review on Space Vector Based-PWM Techniques for Common Mode Voltage Mitigation in Photovoltaic Multi-Level Inverters

Analysis and Implementation of Switched Capacitor-based Multi-Level Inverter for Electric Vehicles Applications

THD Reduction of Improved Single Source MLI Using Upgraded Black Widow Optimization Algorithm

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