Three Level SEPIC For Hybrid Wind-Solar Energy Systems

Mohanraj, K.; Bharathnarayanan, S.

doi:10.1016/j.egypro.2017.05.114

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…The turbine generating coefficient (kWh/m 3 ) in Equation (1) and the water pumping coefficient (m 3 /kWh) in Equation 2are two key parameters of the PHS elements. According to [29,30] the following equation describes the total stored energy E t (in kWh) in the active volume of a reservoir:…”

Section: Dispatch Optimization Modelmentioning

confidence: 99%

Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Simão

Ramos

2020

Water

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This study presents a technique based on a multi-criteria evaluation, for a sustainable technical solution based on renewable sources integration. It explores the combined production of hydro, solar and wind, for the best challenge of energy storage flexibility, reliability and sustainability. Mathematical simulations of hybrid solutions are developed together with different operating principles and restrictions. An electrical generating system composed primarily by wind and solar technologies, with pumped-storage hydropower schemes, is defined, predicting how much renewable power and storage capacity should be installed to satisfy renewables-only generation solutions. The three sources were combined considering different pump/turbine (P/T) capacities of 2, 4 and 6 MW, wind and PV solar powers of 4–5 MW and 0.54–1.60 MW, respectively and different reservoir volume capacities. The chosen hybrid hydro-wind and PV solar power solution, with installed capacities of 4, 5 and 0.54 MW, respectively, of integrated pumped storage and a reservoir volume of 378,000 m3, ensures 72% annual consumption satisfaction offering the best technical alternative at the lowest cost, with less return on the investment. The results demonstrate that technically the pumped hydro storage with wind and PV is an ideal solution to achieve energy autonomy and to increase its flexibility and reliability.

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Section: Dispatch Optimization Modelmentioning

confidence: 99%

Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Simão

Ramos

2020

Water

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“…In Costa et al, 26 a voltage doubling structure with reduced voltage stress was proposed, and for this purpose, two conventional SEPIC converters were integrated. Also, in Mohanraj and Bharathnarayanan, 27 a three‐level SEPIC structure was proposed to reduce the voltage stress across the semiconductors. Although these structures reduce the voltage stress on the semiconductors, they do not offer galvanic isolation and some of them operate only as step‐up voltage regulators.…”

Section: Introductionmentioning

confidence: 99%

A three‐level isolated dc‐dc SEPIC converter with parallel‐connected output

Ewerling

Lazzarin

Font

2022

Circuit Theory & Apps

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This paper presents a comprehensive theoretical analysis and experimental results for three-level isolated dc-dc converter based on the single-ended primary-inductance converter (SEPIC) topology. The main advantage of this structure is the reduction of voltage stress on semiconductors comparing it to the conventional SEPIC converter. Voltage stress is the major challenge associated with the conventional SEPIC structure, and contributions in this area can extend the range of applications for the family of SEPIC converters. The analyzed structure contains two switches, and their commands can be either equal or phase-shifted by 180 . This provides four different modes of operation in discontinuous conduction mode (DCM), which have different operating stages, waveforms, and design equations. In this paper, the topology with parallelconnected output and the static and dynamic theoretical analysis in DCM, for the four command signal profiles, are presented. The advantages and disadvantages, control strategy, experimental results, and a comparative analysis with the conventional SEPIC converter are discussed. The dc-dc SEPIC converter was verified by experimental results from a proof-of-concept prototype with 500 W rated power, 400 V input voltage, 120 V output voltage, and 50 kHz switching frequency. The converter achieved 94.72% efficiency at rated power.

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“…Uma delas, talvez a principal, é o elevado nível de tensão sobre os semicondutores, sendo igual à somatória das tensões de entrada e saída. Estudos que minimizam essa desvantagem são encontrados na literatura [20]- [23], propondo variações topológicas do SEPIC convencional para reduzir os esforços de tensão sobre os semicondutores.…”

Section: Introductionunclassified

“…Em [20] uma estrutura três níveis baseada no conversor SEPIC foi proposta. Para isto, foi adicionado três capacitores, um interruptor e um diodo na estrutura do conversor SEPIC convencional.…”

Section: Introductionunclassified

Conversor CC-CC Isolado Do Tipo Sepic Com Redução Dos Esforços De Tensão Nos Semicondutores

Ewerling¹,

Lazzarin²,

Font³

2020

Eletrônica de Potência

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Resumo-Este trabalho propõem uma topologia baseada no conversor CC-CC SEPIC convencional isolado. A topologia proposta reduz os esforços de tensão sobre os interruptores e diodos e promove a divisão de corrente nos diodos do estágio de saída quando comparada com o conversor SEPIC convencional. Estas características ampliam a faixa de tensão e potência dos conversores da família SEPIC. O artigo apresenta a topologia, etapas de operação, análise teórica no modo de condução descontínuo (MCD), metodologia de projeto, resultados experimentais com um circuito de grampeamento passivo dissipativo e análise comparativa com o conversor SEPIC convencional. O conversor CC-CC proposto foi validado em um protótipo de 500 W de potência de saída, 400 V de tensão de entrada, 120 V de tensão de saída e 50 kHz de frequência de comutação. O conversor atingiu 91,87% de rendimento em potência nominal. Palavras-chave-Conversor CC-CC, Conversor SEPIC, Modo de condução descontínuo, Reduzidos esforços nos semicondutores.

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Three Level SEPIC For Hybrid Wind-Solar Energy Systems

Cited by 7 publications

References 15 publications

Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

A three‐level isolated dc‐dc SEPIC converter with parallel‐connected output

Conversor CC-CC Isolado Do Tipo Sepic Com Redução Dos Esforços De Tensão Nos Semicondutores

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