Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter

Gonzalez, R. Reina; Gubía, E.; López, Jesús; Marroyo, Luis

doi:10.1109/tie.2008.924015

Cited by 522 publications

(172 citation statements)

References 15 publications

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“…The presence of non-negligible leakage current is considered a drawback in this technique due to the parasitic capacitance of PV panel [46]. To eliminate leakage current, the bipolar PWM modulation scheme is used [47,48]. In 1965, McMurray first developed the FB or H-bridge inverter family [29].…”

Section: H-bridge Based Inverter Structuresmentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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Abstract:The research significance of various scientific aspects of photovoltaic (PV) systems has increased over the past decade. Grid-tied inverters the vital elements for the effective interface of Renewable Energy Resources (RER) and utility in the distributed generation system. Currently, Single-Phase Transformerless Grid-Connected Photovoltaic (SPTG-CPV) inverters (1-10 kW) are undergoing further developments, with new designs, and interest of the solar market. In comparison to the transformer (TR) Galvanic Isolation (GI)-based inverters, its advantageous features are lower cost, lighter weight, smaller volume, higher efficiency, and less complexity. In this paper, a review of SPTG-CPV inverters has been carried out. The basic operational principles of all SPTG-CPV inverters are presented in details for positive, negative, and zero cycles. A comprehensive analysis of each topology has been deliberated. A comparative assessment is also performed based on weaknesses, strengths, component ratings, efficiency, total harmonic distortion (THD), semiconductor device losses, and leakage current of various SPTG-CPV inverters schemes. Typical PV inverter structures and control schemes for grid connected three-phase system and single-phase systems are also discussed, described, and reviewed. Comparison of various industrial grids-connected PV inverters is also performed. Loss analysis is also performed for various topologies at 1 kW. Selection of appropriate topologies for their particular application is thoroughly presented. Then, discussion and forthcoming progress are emphasized. Lastly, the conclusions are presented. More than 100 research publications on the topic of SPTG-CPV inverter topologies, configurations, and control schematics along with the recent developments are thoroughly reviewed and classified for quick reference.

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Section: H-bridge Based Inverter Structuresmentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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“…Until the threshold has been achieved the output of the circuit remains constant. The existing system in this field include current regulator techniques which are based on the hysteresis control along with switch logic [6]; Current control technique for a singlephase five-level inverter with flying-capacitor topology [7]; hysteresis current controlled dual-buck half bridge inverter, hysteresis current method for active power filter based on voltage space vector and hysteresis-band current tracking control of grid-connected inverter [3];…”

Section: Hysteresis Control 3-level Si-npc Inverter With Wind Energy mentioning

confidence: 99%

“…In such inverters, parameters such as voltage magnitude can be controlled and harmonics can be supressed. Power rating can be enhanced by increasing the voltage level [3]. The concept of Multilevel inverters aims to reduce the harmonic content in output waveform without decreasing power output from the inverter.…”

mentioning

confidence: 99%

Hysteresis Control 3-Level SI-NPC Inverter with Wind Energy System

Selvakumar¹,

Palanisamy²,

Vijayakumar³

et al. 2017

IJPEDS

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The system is a 3-level Neutral point clamped hysteresis current controlled Inverter with Wind energy as power source. The input DC Power for the multi-level inverter is drawn from wind turbine generator connected through a rectifier circuit. An inductor has been introduced for smoothening the DC output from the rectifier. The inverter uses Neutral Point Clamped topology. The switching pulses for the inverter are achieved by hysteresis current control technique. This system is advantageous over the conventional SPWM based system as the hysteresis current control allows to reduce the low frequency harmonics while also allowing to control the fundamental amplitude depending on frequency. The outputs for the system are verified using MATLAB simulations. The hardware for Hysteresis current control for the inverter is implemented by using a dSPIC microcontroller. The proposed system can be implemented in households for supplying backup power in case of power shortage and can also be used as a primary power source if wind flow is abundant. It is easy to implement, economical and provides clean energy. Keyword:Diode-clamped three level inverter (DC-TLI) Wind Energy System Hysteresis Current control dSPIC microcontroller Copyright © 2017 Institute of Advanced Engineering and Science.All rights reserved.Corresponding Author:R. Palanisamy, Departement of Electrical and Electronics Engineering, SRM University, Kattankulathur, Chennai Email: krspalani@gmail.com INTRODUCTIONIn the midst of the current energy crisis, the need for the use of Renewable energy sources has become utterly important for driving mankind and his machines. Reckless exploitation of the non-renewable energy sources such as fossil fuels since the Industrial age has caused an alarming downfall in the reserves of non-renewable sources of energy besides deteriorating the environment to a critical level [1]. Among various such renewable sources such as solar energy, tidal energy, geothermal energy and others, wind energy is one of the cleanest and efficient forms of energy. Wind energy can be generated in any part of the world where suitable environmental and terrain conditions can be achieved. Wind is caused by the uneven heating of the atmosphere by the sun, variations in the earth's surface, and rotation of the earth. The kinetic energy of wind can be converted to electrical energy to meet our requirements using a wind turbine [2]. Wind energy is the second fastest growing source of electrical energy in the world with a capacity of 432,883 MW (till the end of 2015).The general structure of multilevel inverter is to integrate a sinusoidal voltage from several levels of voltage. It consists of an array of semiconductor devices and capacitor voltage sources, with output voltage in a stepped manner. In such inverters, parameters such as voltage magnitude can be controlled and harmonics can be supressed. Power rating can be enhanced by increasing the voltage level [3]. The concept of Multilevel inverters aims to reduce the harmonic content in output waveform w...

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“…A relevância desse tema pode ser verificada pela grande quantidade de artigos e patentes publicadas (GONZALEZ et al, 2006), (LOPEZ et al, 2006), (GONZALEZ et al, 2007), (GUBÍA et al, 2007), (LOPEZ et al, 2007), (GONZALEZ et al, 2008) (SCHMIDT et al, 2006), (VICTOR et al, 2008), (GONZALEZ et al, 2009), (KEREKES, 2009), (ARAUJO et al, 2010), (CAVALCANTI et al, 2010), (GUBIA et al, 2010), (HUAFENG e SHAOJUN, 2010), (BRADASCHIA et al, 2011), (HUAFENG et al, 2011), (KEREKES et al, 2011, (OZKAN e HAVA, 2011), (PATRAO et al, 2011), (BO et al, 2012, (BUTICCHI et al, 2012), (DONG et al, 2012), (DREHER et al, 2012), (MING et al, 2012), (OZKAN e HAVA, 2012), (BAOJIAN et al, 2013), (BIN et al, 2013), (BARATER et al, 2014), (HUAFENG et al, 2014), (WEIMIN, YUNJIE, ZHE, et al, 2014).…”

Section: Motivação E Objetivosmentioning

confidence: 99%

“…Para aplicações SFCR empregando estágio único de conversão CC/CA as topologias meia ponte e NPC se mostram inadequadas devido à elevada tensão necessária no barramento CC, que requer a utilização de grande quantidade de módulos FV conectados em série (CALAIS e AGELIDIS, 1998), (LOPEZ et al, 2006), (GUBÍA et al, 2007), (GONZALEZ et al, 2008), (ARAUJO et al, 2010).…”

Section: Corrente De Fugaunclassified

Corrente de fuga em inversores monofásicos sem transformador para conexão de sistemas fotovoltaicos à rede de distribuição de energia elétrica: análise e proposta de filtro passivo integrado de modo comum e diferencial.

Figueredo¹

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A Deus por tudo.Aos meus pais, Aurino e Marilene, meus irmãos, Santiago e Valquiria, por todo o apoio, incentivo e compreensão ao longo dessa trajetória.Aos colegas da PUC-SP, Artur e Sidnei, pela troca de ideias e informações que foram essenciais para o meu ingresso no mestrado.Ao Professor Lourenço Matakas Junior pela oportunidade de realizar este trabalho, pelo apoio, pela orientação, correções e ensinamentos.Aos Professores Wilson Komatsu e Marcelo Gradella Villalva pela participação na banca de qualificação, pela revisão do texto, pelas correções e sugestões. Aos Professores do Laboratório de Eletrônica de Potência da Escola Politécnica da USP(LEP-EPUSP) por proporcionarem as condições para realização deste trabalho.A colega de mestrado Kelly pela ajuda no trabalho experimental e por sua colaboração nos trabalhos desenvolvidos em conjunto.Aos colegas do LEP-EPUSP Bruno, Naji e Fernando pelas contribuições diretas e indiretas para o desenvolvimento deste trabalho.A empresa PHB Eletrônica, os engenheiros Ildo Bet e Paulo Gaidzinski, por permitirem a flexibilização de horário que possibilitou minha participação nas atividades do mestrado.Além disso, agradeço pelo apoio e pela compreensão que tiveram da importância desse processo para minha formação profissional.Aos colegas da PHB Eletrônica pela troca de informações, experiências e aprendizado ao longo dos últimos 15 anos.Ao Rogério pela troca de informações sobre inversores e normas.Ao Yoshio pela ajuda, principalmente, com os componentes magnéticos.A Li Fan Ho pela amizade, incentivo e pensamento positivo.A todos que contribuíram direta ou indiretamente para a realização deste trabalho. "Os únicos bens intangíveis são os que acumulamos no cérebro e no coração; quando eles faltam, nenhum tesouro os substitui." José Ingenieros RESUMOEste trabalho apresenta um estudo sobre a corrente de fuga de modo comum em inversores monofásicos sem transformador utilizados para a conexão de sistemas fotovoltaicos (FV) à rede de distribuição de energia elétrica. O estudo se concentra em inversores do tipo fonte de tensão que empregam a topologia em ponte completa. A partir da adequada modelagem do sistema (rede, conversor e módulo fotovoltaico) identifica-se e quantifica-se a contribuição das tensões de modo comum e modo diferencial para a corrente de fuga. Conclui-se que a tensão de modo comum de alta frequência produzida pelo inversor, que depende da estratégia de modulação por largura de pulso (PWM -Pulse Width Modulation) empregada, fornece a maior contribuição para produção da corrente de fuga.Esse estudo mostra que os inversores sem transformador, com topologia em ponte completa e modulação que produz tensão de saída com três níveis, necessitam de medidas adicionais para a minimização da corrente fuga quando aplicados em sistemas fotovoltaicos conectados à rede. Algumas soluções propostas na literatura para a minimização da corrente de fuga baseadas em topologias modificadas e filtros de modo comum são listadas e discutidas. Neste trabalho é proposto um filtro integrado...

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Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter

Cited by 522 publications

References 15 publications

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

Hysteresis Control 3-Level SI-NPC Inverter with Wind Energy System

Corrente de fuga em inversores monofásicos sem transformador para conexão de sistemas fotovoltaicos à rede de distribuição de energia elétrica: análise e proposta de filtro passivo integrado de modo comum e diferencial.

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