Design of 17-Level Inverter with Reduced Switch Count

Nyamathulla, Shaik; Dhanamjayulu, C.

doi:10.1109/i-pact52855.2021.9696784

Cited by 4 publications

(10 citation statements)

References 26 publications

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“…An important problem in photovoltaic (PV) system designs is determining the best converter for each application. The MLI is chosen for medium-and high-power applications due to its ability to produce high-quality voltage waveforms while operating at a low switching frequency [20][21][22]. Figure 11 exhibits examples of MLIs being employed in diverse applications, and Figure 12 illustrates the different possible types of energy sources integrated with MLI-based systems.…”

Section: Applications Of Multilevel Inverters In Renewable Energy Sys...mentioning

confidence: 99%

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An Overview of Multilevel Inverters Lifetime Assessment for Grid-Connected Solar Photovoltaic Applications

2023

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Nowadays, due to advancements in power electronic devices as well as the rise in consumer awareness of the need to protect the environment on a global scale, many people are turning to the use of solar photovoltaic (PV) technology in the distributed power generation side. In the field of power electronics, manufacturers need to develop products that have high lifespans. Power electronic device reliability is important for the maintenance of the device and may be scheduled under that information. Rather than preventing failures, reliability can be improved by predicting them. Even though some research has been conducted over the past few years to investigate the reliability of power electronic devices, the reliability is many common circuits has not been investigated and this leads to a big challenge for researchers. In this review paper, an overview of the grid-connected multilevel inverters for PV systems with motivational factors, features, assessment parameters, topologies, modulation schemes of the multilevel inverter, and the selection process for specific applications are presented. In this paper, the findings of a comprehensive reliability analysis of fundamental multilevel inverters are studied. To evaluate the reliability of three basic multilevel inverters, a calculation is made using each component’s mean time before its failure. Two techniques of computation approximate and exact were used to arrive at the final result. To calculate power losses in temperature-sensitive components such as diodes and switches, MATLAB Simulink is employed. In addition, the concept of oversizing photovoltaic (PV) arrays is presented in this study. This concept proposes that energy output may be increased by increasing the size of the PV array under conditions of poor solar irradiation. Finally, the mission-profile-based and Monte Carlo simulation-based methods process flows are discussed for the accurate lifetime prediction and reliability assessments of PV inverters in a real-time scenario, followed by a conclusion with future work.

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Section: Applications Of Multilevel Inverters In Renewable Energy Sys...mentioning

confidence: 99%

“…Switch and diode base failure rates λ b are 0.012 and 0.064, respectively. For inductors, use Equation (20) [50,68]:…”

Section: Exact Techniquementioning

confidence: 99%

An Overview of Multilevel Inverters Lifetime Assessment for Grid-Connected Solar Photovoltaic Applications

2023

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“…It has ten unidirectional switches with anti-parallel diodes and three asymmetrical DC voltage sources in a 1:2:5 ratio to produce the expected 17-level output voltage. It is described in detail in the aforementioned [134]. (2) Symmetrical Unit-Based Topology There are two unit-based topologies that function with a reduced device sum for a specified number of output voltage levels [2].…”

Section: B Unit-based Rsc-mlismentioning

confidence: 99%

A Review of Multilevel Inverter Topologies for Grid-Connected Sustainable Solar Photovoltaic Systems

Nyamathulla,

Chittathuru

2023

Sustainability

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Solar energy is one of the most suggested sustainable energy sources due to its availability in nature, developments in power electronics, and global environmental concerns. A solar photovoltaic system is one example of a grid-connected application using multilevel inverters (MLIs). In grid-connected PV systems, the inverter’s design must be carefully considered to improve efficiency. The switched capacitor (SC) MLI is an appealing inverter over its alternatives for a variety of applications due to its inductor-less or transformer-less operation, enhanced voltage output, improved voltage regulation inside the capacitor itself, low cost, reduced circuit components, small size, and less electromagnetic interference. The reduced component counts are required to enhance efficiency, to increase power density, and to minimize device stress. This review presents a thorough analysis of MLIs and a classification of the existing MLI topologies, along with their merits and demerits. It also provides a detailed survey of reduced switch count multilevel inverter (RSC-MLI) topologies, including their designs, typical features, limitations, and criteria for selection. This paper also covers the survey of SC-MLI topologies with a qualitative assessment to aid in the direction of future research. Finally, this review will help engineers and researchers by providing a detailed look at the total number of power semiconductor switches, DC sources, passive elements, total standing voltage, reliability analysis, applications, challenges, and recommendations.

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“…Quantitative and qualitative evaluations of similar and different asymmetrical MLI configurations are carried out to showcase the benefits of the suggested topology. For both the same number of output voltage level topologies [21][22][23][24][25][26][27][28] and different numbers of output voltage level topologies [6], [9], [16], [20], [29][30][31], a comparison has been made per level concerning the required driver circuits, dc sources, switches, the factor of the component count, maximum conducting devices, TSV PU , and cost factor are tabulated in Table 3.…”

Section: Comparisonsmentioning

confidence: 99%

“…As a result, one of the fastest-growing study fields in MLIs is lowering the power switch count, and several topologies with fewer devices have recently been presented [5]. Seventeen level asymmetric MLI topology for medium voltage applications with less dc sources count, less power switches, and lower dv/dt stress on switches was proposed in [6].…”

Section: Introductionmentioning

confidence: 99%