Minimization of power loss in newfangled cascaded H-bridge multilevel inverter using in-phase disposition PWM and wavelet transform based fault diagnosis

Garapati, Durga Prasad; Jegathesan, V.; Veerasamy, Moorthy

doi:10.1016/j.asej.2016.09.008

Cited by 17 publications

(4 citation statements)

References 32 publications

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“…Table 1 demonstrates the required number of power switches and DC sources for the traditional and proposed boost DC-link-based inverter to generate a stepped output waveform from seven levels to fifteen levels. From the investigation, it is gathered that the proposed TLBDCLCHB MLI system has reduced the switch count and requires just a single DC source compared to traditional boost multilevel inverter (MLI) systems [14,15]. Table 1.…”

Section: Structure Of Tlbdclchb MLI Systemmentioning

confidence: 99%

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FPGA Implementation of a Three-Level Boost Converter-fed Seven-Level DC-Link Cascade H-Bridge inverter for Photovoltaic Applications

Rao

Venkata²,

Babu

2018

Electronics

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This paper presents an optimized single-phase three-level boost DC-link cascade H-bridge multilevel inverter (TLBDCLCHB MLI) system to generate a seven-level stepped output voltage waveform for photovoltaic (PV) applications. The proposed TLBDCLCHB MLI system is obtained by integrating a three-level boost converter (TLBC) with a seven-level DC-link cascade H-bridge (DCLCHB) inverter. It consists of a TLBC, level generation unit (LGU) and phase sequence generation unit (PSGU). When compared with traditional boost converter-fed multilevel inverter systems, the proposed TLBDCLCHB MLI system requires a single DC source, fewer power switches and gate drivers. Reduction in the switch count and number of DC sources makes the system cost effective and requires a smaller installation area. Pulse generation for the power switches of an LGU in a DCLCHB inverter is accomplished by providing proper conducting angles that are generated by optimized conducting angle determination (CAD) techniques. In this paper two CAD techniques i.e., equal-phase CAD (EPCAD) and step pulse wave CAD (SPWCAD) techniques are proposed to evaluate the performance of the proposed system in terms of the total harmonic distortion (THD) and the quality of the stepped output voltage waveform. The proposed system has been modeled and simulated using MATLAB/SIMULINK software. Results are presented and discussed. Also, a prototype model of a single-phase TLBDCLCHB MLI system is developed using a field-programmable gate array (FPGA)-based pulse generation with a resistive load and its performance is analyzed for various operating conditions.

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Section: Structure Of Tlbdclchb MLI Systemmentioning

confidence: 99%

“…Equation 14gives the output voltage for the multiple stages of the boost converter. The efficiency of the proposed converter for the N-level is given by the Equation (15).…”

Section: Tlbc Voltage Drop Across Switch and Diodesmentioning

confidence: 99%

FPGA Implementation of a Three-Level Boost Converter-fed Seven-Level DC-Link Cascade H-Bridge inverter for Photovoltaic Applications

Rao

Venkata²,

Babu

2018

Electronics

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“…To improve output voltage waveform, multi-level inverters are implemented through numerous control techniques to enhance the waveforms. These control methods such as Space Vector Modulation (SVM), Sinusoidal Pulse Width Modulation (SPWM), and Selective Harmonics Elimination Pulse Width Modulation (SHE PWM) employed to assess the output voltage of converters [15,16,17]. As equipment, undergone impressive developments in the industry and utility networks, the different stages of the converter have progressed.…”

Section: Introductionmentioning

confidence: 99%

Design Level Shifted Multicarrier Techniques for Cascaded H-Bridge Sub-Multilevel Inverter

Korai

Mahar

Larik

et al. 2020

J. ICT des. eng. technol. sci.

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The key aim of this paper is to implement and analyze level-shifted multicarrier techniques in Cascaded H Bridge (CHB) -Sub multi-level inverter to produce multiple level output voltage. The multi-level inverter is to synthesize a near sinusoidal voltage from several levels of dc voltages. The asymmetrical DC voltage sources are used for CHB Sub-Multilevel inverter, and the 15-level output voltage is obtained. The asymmetrical DC voltage Sources 12V, 24V, and 48V are used to get the 15 Level output voltage. The multicarrier Pulse Width Modulation (PWM) is used to get the desired voltage at the output. The Level Shifted Phase Disposition (LSPD) and Level Shifted Phase Opposition Disposition (LS-POD) multicarrier PWM techniques are used to reduce the Total Harmonic Distortion (THD) in the output voltage. The circuit is developed and analyzed in MATLAB software. The THD, measured by using the FFT tool of MATLAB software From the simulated results, the level-shifted phase opposition disposition multicarrier PWM has better performance than level-shifted phase disposition multicarrier PWM technique because it contains fewer harmonics so to improve the system reliability and quality. The performance analysis and mitigation of harmonics can enhance the power quality of the supply voltage delivered to the customers. However, power quality occurs several problems such as voltage sag, swell, under-voltage, overvoltage, transients, etc.

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“…В качестве критерия оценивания качеств выходного напряжения был принят коэффициент гармонических искажений [20].…”

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The study of five-level inverters with various PWM

Lysenko¹,

Okhotnikov²,

Захаренко³

et al. 2019

OSB

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о. А. лысеНКо А. А. оХотНиКоВ В. А. зАХАреНКо В. Ю. КоБеНКо Омский государственный технический университет, г. Омск исслеДоВАНие ВлияНия АлгоритМоВ форМироВАНия шиМ ПятиУроВНеВыХ иНВертороВ с АКтиВНо-иНДУКтиВНой НАгрУзКой НА ПАрАМетры ВыХоДНого НАПряжеНия В статье проводится анализ энергетических показателей многоуровневых преобразователей напряжения. На актуальность исследования указывают возрастающие требования технологических процессов к экономичности использования электрической энергии, к сокращению потребляемой полупроводниковыми преобразователями мощности, а также к уровню регулируемой реактивной мощности. Рассматриваемый преобразователь представляет собой пятиуровневый инвертор напряжения. В качестве топологии преобразователя рассматривается структура инвертора на H-мостах. В статье приводится двухкаскадная трехфазная схема с соединением ячеек инвертора в звезду. Описываются возможные состояния электронных ключей и соответствующие им режимы работы. Напряжение источников постоянного напряжения составляет 535 В. В статье рассматриваются алгоритмы формирования широтно-импульсной модуляции (ШИМ): фазовая оппозиция (ФО), альтернативная фазовая оппозиция (АФО) и гибридные методы с синусоидальной нулевой последовательностью модулирующего сигнала или с треугольной нулевой последовательностью модулирующего сигнала. В качестве критерия оценивания качеств выходного напряжения инвертора был принят коэффициент гармонических искажений (КГИ), а также уровень линейного напряжений. Приводится гармонический спектр напряжения при различных способах управления преобразователем. Показаны возможные способы уменьшения коэффициента гармоник, а также увеличения коэффициента амплитудной модуляции за счет применения различных способов формирования широтноимпульсной модуляции. Ключевые слова: мостовые схемы, инверторы, многоуровневые преобразователи, широтно-импульсная модуляция, трехфазная электрическая мощность, коэффициент гармонических искажений.

show abstract

Minimization of power loss in newfangled cascaded H-bridge multilevel inverter using in-phase disposition PWM and wavelet transform based fault diagnosis

Cited by 17 publications

References 32 publications

FPGA Implementation of a Three-Level Boost Converter-fed Seven-Level DC-Link Cascade H-Bridge inverter for Photovoltaic Applications

FPGA Implementation of a Three-Level Boost Converter-fed Seven-Level DC-Link Cascade H-Bridge inverter for Photovoltaic Applications

Design Level Shifted Multicarrier Techniques for Cascaded H-Bridge Sub-Multilevel Inverter

The study of five-level inverters with various PWM

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