The global concern to reduce greenhouse gas emissions and increase the use of renewable sources has led Brazil stand out as a promising nation in this context, with large portion its energy capacity coming from sources. However, have disadvantage intermittency seasonality, which prompted search for solutions these challenges. This study assesses feasibility integrating hydro solar power Hydrogen-based Electrical Energy Storage System (H2EESS) at Serra da Mesa hydroelectric Brazilian plant....

The analysis of the transient overvoltages in a pulsewidth modulation (PWM) motor drive system comprises wide frequency range, which starts with low values corresponding to speed, includes switching harmonics, can reach up few hundreds kHz, and also cable resonance frequency, value be MHz depending on length. In this context, work presents time domain methodology for modeling able represent parameters variation due skin effect broad range frequencies. proposed technique reproduces accurately...

A transição energética global tem impulsionado o crescimento de fontes limpas geração energia, com a solar fotovoltaica liderando essa expansão, especialmente no Brasil, onde representa cerca 97% da distribuída. Lei nº 14.300/2022, ao estabelecer marco legal distribuída, alterou sistema compensação diminuindo gradativamente valor energia injetada na rede em relação custo do consumo, que impacta viabilidade econômica projetos fotovoltaicos. Neste contexto, fator simultaneidade (FS), relaciona...

Given the significant increase in electricity consumption, especially industrial and commercial categories, exploring new energy sources developing innovative technologies are essential. The fourth revolution (Industry 4.0) digital transformation not just buzzwords; they offer real opportunities for sustainability, using such as cloud computing, artificial intelligence, Internet of Things (IoT). In this context, study focuses on improving efficiency smart spaces within context Industry 4.0...

This paper focuses on switched reluctance generator dealing with the grid operation of power machine dc output. Mathematical and computing models for this are presented. In addition, an inexpensive converter topology was used. allows to supply electrical load even when is off. Simulations experimental results also can make complementary wind generation cheap end efficient.

This paper presents the study of relationship between soil apparent electrical resistivity ρ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> and i) moisture content, ii) clay content iii) compaction, for use as a mapping tool spatial variability. It was held measures ρa in different types, varying gradually while maintaining constant then compaction relating it to humidity. For variability, chosen an area that would allow change order...

This study focused on developing a sustainability project carried out in 11 Federal Institute of Education, Science, and Technology Goiás (IFG) campuses wherein energy efficiency distributed generation actions were developed. Energy consumption was optimized by retrofitting the lighting system, installing photovoltaic (PV) quantifying building efficiency, monitoring, training, qualification, focusing efficient use electric energy. We first present Brazilian legislation that regulates...

The analysis of the transient overvoltages in a PWM motor drive system comprises wide frequency range, which starts with low values corresponding to speed, includes switching harmonics, can reach up few hundreds kHz, and also cable resonant frequency, value be MHz depending on length. In this context, work presents time domain methodology for modeling able represent parameters variation due skin effect broad range frequencies. Three different methods parameter estimation are studied compared...

This paper presents a Switched Reluctance Machine (SRM) dynamic performance analysis under some operating conditions as fault or lack of phase, different excitement voltage, speed variation. Thus, an SRM 8/6 was designed and built bench to drive it, aiming study the techniques generated voltage control for use in small wind turbine generators. The driving done through data acquisition processing system high low cost (DSP/FPGA). experimental results are shown discussed.

This paper presents a study about the use of proportional-integral (PI) controller in cascade configuration. A sensitivity controllers parameters was done and, after that, they were obtained through optimization methods employing deterministic and heuristic strategies. applied on simulation model, order to verify which one provides better control results.

O objetivo deste artigo é propor uma estratégia de melhoria da conversão eletromecânica energia do Gerador a Relutância Variável (GRV). Esta implementada através controle magnetização cada fase GRV. Para isto, foi utilizado um compensador tipo PI para controlar tensão na carga atuando no ângulo abertura chave superior conversor em ponte assimétrica, half-bridge (HB), o que adiciona etapa roda-livre às etapas operação conversor. No sentido verificar eficiência proposta, foram desenvolvidas...

Considering the actual environmental appeal due to excessive consumption of fossil fuels, is relevant research and development green power sources in order conserve natural resources. Wind energy has become a target researches highlights clean scenario. Electrical machines have its reversibility and, operating as generators, can be useful for wind aaplications. The switched reluctance generator (SRG) several advantagens this application. In paper, simulation results are presented SRG...

The Switched Reluctance Generator - SRG and its converters are the subjects of this article. It deals with power machine grid connected through a rectified DC link. Mathematical computing models used in simulations presented. converter topologies implemented work well proposed alternative is cheaper more efficient than conventional half-bridge structure. Furthermore, allows supplying load from even when not running. Simulation results tests shown that works as expected it stable under...

This paper performs a comparative analysis between two types of reactive compensation in typical industrial systems: by capacitors banks (capacitive compensation) and synchronous machine (synchronous compensation). For the tests busbar subjected to harmonic distortion with low power factor is implemented. The results show equivalent for both cases, however presents advantage mitigating distortion, mainly high frequency components.

This paper presents an analysis of the performance photovoltaic (PV) systems using daily applications periodic linear regression method to indicators Final Yield (YF) and Reference (YR). The research was conducted on PV installed rooftops ground at Federal Institute Education, Science, Technology Goiás (IFG), Itumbiara Campus, from July 2022 August 2023. Energy Monitoring Management Software (SMGE) developed calculate perform analyze systems. results demonstrate that efficiency can be...

Power generation through photovoltaic technology has become an essential source of electricity in the world recent years. In Brazil, it is already second most immense installed power electrical matrix, and, as a result, anomalies panels tend to losses because they are elements exposed actions nature. Techniques for detecting problems have been studied, and among these, use thermographic images collected with help drones stands out. this work, solution developed using computer vision...

The emphasis given to this paper is on the elaboration of energetic efficiency project with addition photovoltaic generation in a public educational institution superior education, according established guidelines by National Agency Electric Energy (ANEEL) and United Nations Framework Climate Change Convention (UNFCCC). In way, energy gains are presented saved (EE) MWh/year Reduction Tip Demand (RDP) kW, economics Total Annual Costs (CAT) R$/year, Annualized Benefits (BAT) R$/year Cost...

Soil Stratification methods are used to estimate soil geoelectrical parameters. Several stratification available, but reducing the error estimation introduced by such still poses as a challenge. The purpose of this work is present heuristic algorithm applied optimization prospection process. goal parameters, amount layers, thickness and resistivity each layer in an optimal automated manner. consists analyzing sensitivity sampling space propose methodology shows reduction above 75% between...

A preocupação global em reduzir os gases do efeito estufa e aumentar o uso de fontes renováveis levou Brasil a se destacar como uma nação promissora nesse contexto, com grande parte sua capacidade energética vinda renováveis. Porém, as têm desvantagem da intermitência sazonalidade, que à busca por soluções para esses desafios. Esse estudo avalia viabilidade integração hidro solar um Sistema Armazenamento Energia Elétrica na Forma Hidrogênio (SAEEH2) usina hidrelétrica Serra Mesa. O...

The effects of magnetic saturation on the operation induction motors driven by static converters are analyzed. A mathematical model based harmonic functions is used to account for saturation. Distortions air gap flux due non-linear characteristics lead appearance space harmonics in resultant density distribution. This causes specific distortions stator and rotor time quantities, which different from those converter. Operation with six pulse sinusoidal PWM under saturated conditions...

O propósito deste trabalho é apresentar um operador genético desenvolvido a partir dos métodos matemáticos de extrapolação curva. Este irá auxiliar na produção indivíduo melhor adaptado população algoritmo com codificação real, reconhecendo padrões inerentes aos genes cromossomos melhores indivíduos cada geração. proposto em conjunto real comparado cinco outros diferentes otimização aplicados prospecção geoelétrica.

Solar water heating in homes of low-income families as Energy Efficiency Action enables energetic benefits from points view the consumer and Brazilian electrical system, thereby reducing environmental impacts associated with generation, transmission distribution electricity. The purpose present study is to evaluate these gains through measurement verification methodology adapted International Performance Measurement Verification Protocol, case studies involving Projects Goiás State, Brazil....

This paper proposed experimental method that uses geoelectrical prospection to correlate variations in the soil electrical resistivity produced by application of agricultural supplies, such as nitrogen, phosphor, potassium and limestone. The a three-dimensional stratification methodology enable mapping dynamic aimed different proportions supplies applied. results shows is possible recognize behavior layers values each layer on chemical influence. proposal performs monitoring area order...