Programa de Pós-Graduação em Engenharia Elétrica - PPGEE/ITEC

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2314

O Programa de Pós-Graduação em Engenharia Elétrica (PPGEE) do Instituto de Tecnologia (ITEC) da Universidade Federal do Pará (UFPA) foi o primeiro e é considerado o melhor programa de pós-graduação em Engenharia Elétrica da Região Amazônica. As atividades acadêmicas regulares dos cursos de mestrado e doutorado são desenvolvidas principalmente nas Faculdades de Engenharia Elétrica e Engenharia de Computação, supervisionadas pela Coordenação do Programa de Pós-Graduação em Engenharia Elétrica (CPPGEE).

Navegar

Agora exibindo 1 - 18 de 18

Acesso aberto (Open Access)
Avaliação da influência da configuração de controladores de carga no desempenho de geradores fotovoltaicos suprindo uma nanorrede de distribuição em corrente contínua
(Universidade Federal do Pará, 2022-09-09) ALBUQUERQUE, Luana Oliveira de; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This thesis presents an evaluation of photovoltaics generators productivity, using different configurations charge controllers used in isolated system, which them are interconnected and constituted a distribution nanogrid in direct current. To support the research, there is a contextualization of the microgrids uses and the presentation of the nanogrid employed, which it is installed in the test area of Group of Studies and Development of Energy Alternatives (GEDAE) of Federal University of Pará. Throughout the thesis, the main equipments responsible for the formation of this network are indicated, as the charge controllers, associated with energy storage systems and photovoltaic generators. Different configurations from those recommended by the manufacturers are adopted, but within acceptable limits, in order to increase the productivity of photovoltaic generators and reduce losses. According to the results, when only one generation and storage system were in operation, it was observed an increase in generation productivity and a decrease in losses; when the nanogrid with all systems in operation was analyzed, with different configurations, it was observed a reduction of losses per capture, but the increase of productivity did not appear in the analysis because of exchange of energy presents in the nanogrid
Acesso aberto (Open Access)
Avaliação de desempenho operacional de microgeração e minigeração solar fotovoltaica em edificação comercial, industrial, residencial e pública no Estado do Pará
(Universidade Federal do Pará, 2022-11-18) MONTEIRO, Weslley Leão; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This work evaluates the operational performance of different Photovoltaic Systems Connected to the Electric Grid, installed in 5 (five) consumer units, four in the metropolitan region of Belém/PA and one in Santarém/PA, consumption class: Residential, Commercial, Industrial and Public, in order to contribute to the construction of scientific knowledge and make public performance values of photovoltaic generators connected to the conventional grid in the North region of the country. For this, the electricity production data provided by the online monitoring platform of the grid connection inverter of each SFCR, in the years 2019 to 2021, was considered for the calculation of the merit indexes. monitoring, the data presented on the inverter display was considered. To calculate the final yield (YF) of two systems, the value of the real power of the photovoltaic generator was considered through I-V curve tests carried out in real sun with a curve tracer (Solar IVe) provided by GEDAE/UFPA, considering measurements performed in an arrangement of a subsystem. For the estimated performance ratio calculation, the Meteonorm v8.0 database was considered to obtain irradiation in the GFV plane. The results obtained in this work allow comparing the estimated global performance of the systems, making it evident that the operational results are directly related to the solution implemented in each system, to good practices during installations, and the importance of a more rigorous and continuous control of the SFCR monitoring.
Acesso aberto (Open Access)
Avaliação teórica e experimental de geradores fotovoltaicos sob diferentes condições de sombreamento
(Universidade Federal do Pará, 2017-08-10) RODRIGUES, Marinaldo de Jesus dos Santos; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This work evaluates the impact of shadowing in four experimental systems installed in the test area of the Group of Studies and Development of Energy Alternatives – GEDAE. These systems are subdivided in: an experimental system that evaluates the shading impact on module level and three systems that evaluate this impact on grid-connected PV system (GCPV) level. System’s operation was evaluated in terms of its natural conditions and under forced shadowing, called simulated shadowing in this work. The obtained results were applied to models used under shadowing conditions and also to calculate performance metrics used in the evaluation of PV systems. The results obtained in this work complement studies traditionally applied to shadowing impact assessment, but such studies are limited to the evaluation of I-V and P-V curves under specific conditions and, in most cases, they apply only to PV module level. Furthermore, this work presents some specific results associated to the shadowing of a GCPV composed by dc-dc converters in a module level.
Acesso aberto (Open Access)
Avaliação teórica experimental de sistemas fotovoltaicos de bombeamento de água
(Universidade Federal do Pará, 2024-01-24) SILVA, Gabriel Bastos de Souza; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088; https://orcid.org/0000-0002-6097-8620
The photovoltaic pumping system represents a sustainable solution to provide access to potable water in remote communities of the Amazon region, whether for human consumption or agricultural irrigation, in areas with limitations in electrical supply from the local utility company. A central component of this system is the motor pump, responsible for suctioning the fluid and conveying it through a piping system to the desired destination and is often associated with a power conditioning device. This device acts as a converter from direct current to alternating current and may incorporate a mechanism for tracking the maximum power point of the photovoltaic generator. However, in photovoltaic systems, it is common for the motor pump to operate at frequencies below the nominal, resulting in lower efficiency compared to situations where energy supply is constant from the local electrical grid. Therefore, this study proposes an approach based on theoretical equations of the system components, aiming to predict an optimized operating point for the pump, considering factors affecting the performance of the photovoltaic generator, such as solar irradiance and temperature. To achieve this, the laboratory of the Study and Development of Alternative Energy Group has a test bench for simulating manometric heights. This was employed in this study to compare the performance of three photovoltaic pumping systems with simulations conducted in a MATLAB program, developed in a doctoral thesis defended in the Graduate Program in Electrical Engineering at the Federal University of Pará. The results highlighted the effectiveness of the methodology in identifying an optimal efficiency point for these systems, suggesting its applicability in specific types of pumping systems. Although in some situations, real-world operation showed discrepancies compared to predictions, overall, this model proved to be valuable for guiding projects aimed at implementing photovoltaic pumping systems in specific wells with enhanced energy efficiency.
Acesso aberto (Open Access)
Controle de frequência de geração fotovoltaica considerando inércia virtual
(Universidade Federal do Pará, 2018-01-30) RAMOS, Vanessa Menezes; NUNES, Marcus Vinícius Alves; http://lattes.cnpq.br/9533143193581447
The large-scale integration of intermittent sources of renewable energies, such as photovoltaic systems, into electrical power systems generates new technical issues, since such sources do not participate in frequency regulation because they do not exhibit inertia of rotation. The rapid frequency variation, normally found in networks with a high degree of integration of renewable generation, therefore causes greater difficulty in maintaining frequency stability, unlike conventional systems (for example Hydro and Thermal), where the inertia of the generators is sufficiently high , for most of these new systems this is not valid. In this context, the present dissertation will propose the use of the concept of "virtual inertia", which corresponds to a combination of control algorithms, electrical energy storage devices and power electronics applied to renewable sources, such as photovoltaics, connected to networks of power through inverters, which emulates the inertia of a conventional generation system. It will be presented a model based on a small linearized signal analysis, developed to evaluate the stability of a power control circuit when the photovoltaic generator provides frequency response and the inertial response emulated with photovoltaic systems by means of techniques based on the MPPT controller in the Displacement Method and the Droop control strategy in the time domain. This modeling is tested in an electric power system composed of synchronous machines and a large-scale photovoltaic power generation plant for the analysis of the effects of the control system in relation to frequency stability. The simulations performed with MATLAB/Simulink software consider different inertia constants for a condition of variation (decrease) in the electric frequency, caused by the insertion of loads in the electric system. Comparative results indicate that the impact of photovoltaic generation on the stability of the power system is greater when the power supplied by the conventional plant generator is lower. Results also prove that when the photovoltaic system is supplying power to the grid, its frequency decreases, affecting the stability and operation of the power system through the degradation of the frequency dynamics.
Acesso aberto (Open Access)
Desenvolvimento de uma ferramenta computacional para otimização de cálculo luminotécnico de interiores baseado em algoritmo genético
(Universidade Federal do Pará, 2019-09-17) MONTEIRO, Ana Laura Pinheiro Ruivo; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
There is a large quantity of lamps and luminaires that present their on characteristics, such as the amount oflumens and life time. Thus, there are several possible combinations of lamps and luminaires that can be employed as a solution to adapt the lighting of a given indoor environment. What will differentia teach solution will be the cost of investment and the time of financial return. This work presents the development of a tool that provides the user with the possibility to carry out lighting studies for any internal business environment ,considering multiple scenarios and following the regulations set by the NBRISO/CIE 8995-1:2013. Studies are carried out in an optimized method by running a genetic algorithm, which has as objective function the minimization of time of financial return on investment of lamps and luminaires,which are necessary for the achievement of illuminance area. For the development of the tool spread sheets were associated with the Python programming language and the PyCharm as the development software. The lumens method was used for lighting sizing, the simple linear regression technique was used to estimate the rate of electrical power for a period of 10 years and NetPresent Value a long side the discounted pay back for analysis of financial return of the solutions generated by the tool. The developed tool was applied in four different scenarios in the Amazon Energy Efficiency Center(CEAMAZON) building. Valid solutions for all scenarios were found, that is, a pay back with in 10 years, taking into consideration the initial investment, annual consumption and maintenance,if any. The best solutions were simulated by the software DIALux as an aid in the projection of the distribution of luminaires in environments. The aspects described in this work show the functionality and applicability of this tool, in order to support the user in the planning of lighting projects, having achieved the established goal, showing functionality and effective ness.
Acesso aberto (Open Access)
Dimensionamento, simulação e análise econômica de um sistema fotovoltaico conectado à rede com armazenamento de energia.
(Universidade Federal do Pará, 2022-04-29) ARAÚJO, Richardson Salomão de; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This study proposes a grid-connected photovoltaic system (GCPVS) project with an energy storage system for Children and Adolescents Hospital (CAH) in Macapá-AP. It presents the sizing of the system contemplating the lithium-ion battery bank, modeling of the photovoltaic system, as well as the simulation of the operation of the proposed system, carried out in the computational tool Simulink/Matlab 2018b, in order to measure the estimate of energy to be produced. and stored. The objective is the generation and storage of energy during the day (off-peak hours), so that it can be used by the load at peak hours, whose tariff value is higher. After the simulations carried out for the months with the highest and lowest global irradiation incident on the generating plane, as well as for the days of the year with the highest and lowest irradiation, it was verified as a result obtained, in the latter case, that the system will still need to connect to the concessionaire. during peak hours, demonstrating that there will be days when the storage system cannot be loaded satisfactorily. It is also proposed an estimated budget of the system and its financial analysis in function of the estimated energy production in simulation. The economic viability is demonstrated, with a return on investment in nine years, over the life of the GCPVS, as well as an economic sensitivity analysis based on financial parameters such as energy tariff value and watt-peak cost of the system. However, the system will fulfill its mission of reducing the cost of the CAH energy bill in a sustainable way and can be expanded (scalable)
Acesso aberto (Open Access)
Gestão de armazenamento de energia integrado com fontes renováveis e intermitentes
(Universidade Federal do Pará, 2023-07-13) MORAES, Wuanda Letícia da; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813
This work address the configuration of energy storage integrated to intermittent renewable sources, especially photovoltaic systems, connected to the electricity distribution network. This is the result of the Research and Development Project, “Multimodal Electric Mobility Intelligent System (R&D) Applied in the Amazon Region (SIMA)”, developed at the Amazon Energy Efficiency Center (CEAMAZON), where there is a mini electric network with photovoltaic generation, diesel generation, electric vehicles charging stations, energy storage and coupling point with the CA network of the university city Prof. Dr. José da Silveira Netto, of Federal University of Pará. The mini electric network management is accomplished by a hybrid inverter associated with a load controller, capable of informing and managing the power that is being generated by the FV arrangements, the charging state of the battery bank, which also has its own management, through the BMS (Battery Management System); and the power being injected into the AC bus. With the case study, management strategies were defined through demand-side energy management, time shift, with a 55% reduction in the total cost of the 2022 annual bill for the CEAMAZON building. In addition, an economic feasibility analysis was presented through the tip load factor (FCp) with PDE 2032 VLP , arriving at a positive and justifiable result for application. Finally, a carbon exchange analysis arrived at a sustainability equivalent of 11 trees typical of the Amazon rainforest cultivated for the total emissions avoided in 2022 in the university city; and a carbon credit 298.43 tCO2, corresponding to R$ 131,902.4 for the carbon market.
Acesso aberto (Open Access)
Impactos de cargas motrizes na qualidade de energia e eficiência energética em uma nanorrede de distribuição em corrente contínua
(Universidade Federal do Pará, 2024-03-22) ALVES, Victor Parente de Oliveira; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259
This work presents an experimental study involving the impacts of rotative loads on electrical energy quality and energy efficiency in a Direct Current Distribution Nanogrid (DCDN) idealized and implemented by the Grupo de Estudos e Desenvolvimento de Alternativas Energéticas (GEDAE) in Ilha das Onças, a community on the banks of the Piramanha River, Barcarena-Pará. Therefore, two types of rotative loads were selected for this work: DC motor pumps, directly connected to the DCDN, and AC models, supplied through inverters; and refrigeration equipment: refrigerator and freezer, both with the same compressor model and operating on direct current. The work presents the technical characteristics of the DCDN, as well as the instrumentation used for measurement and data acquisition involving electrical parameters of the grid and monitored loads. The energy quality events addressed relate especially to the presence of ripples with the injection of AC current along the DCDN in the steady-state operation regime of the rotative loads and inrush current during the activation of the motor pumps. Regarding short-duration events, focus is given to voltage sag during the activation of refrigeration, as there is a peak of demand of high magnitude, reaching more than 28 times the effective nominal current, or rms value, for one of the loads. Concerning energy efficiency, a comparative study is conducted involving the current operational scenario of the nanogrid with the use of mixed DC and AC loads and other technically feasible but not implemented scenarios, in order to highlight the benefits of the current configuration for energy supply to families in the area. Finally, cost avoidance estimates and emission reductions are also addressed, considering the use of gasoline motor pumps before the implementation of the DCDN, through the presentation of data and information obtained from one of the households presented in the work.
Acesso aberto (Open Access)
Influência da microgeração fotovoltaica no perfil de demanda e seus impactos na geração de harmônicos na rede
(Universidade Federal do Pará, 2024-02-29) PARIJÓS JÚNIOR, Ivan Ruy de; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259; https://orcid.org/0000-0001-6248-5187; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088; https://orcid.org/0000-0002-6097-8620
This study addresses the integration of photovoltaic generation into the electrical grid, emphasizing the necessity to consider changes in the load profile of consumer units and the presence of harmonic components in the grid current, originating from loads with nonlinear characteristics and photovoltaic inverters. Various percentages of inverter loading were considered in the study to evaluate their impact on grid operation due to varying levels of harmonic components. The research comprises an experimental phase, a phase dedicated to developing models of inverter output currents, and a simulation phase. In the experimental phase, data on the output currents of three photovoltaic inverters were collected. These data were then utilized in the development of models of inverter output currents for theoretical analyses, evaluating factors influencing the power quality of the grid. Subsequently, these models were applied in the simulation phase. The grids evaluated in the simulation phase include a standard IEEE system and a real isolated grid, located in the Northern region of Brazil. Comparative assessments of network hosting capacity were conducted using two different strategies. The first strategy employed conventional power flow analysis, while the second strategy applied the developed models. It is observed that the operation of different inverters within the same grid may contribute to harmonic attenuation. Furthermore, it is highlighted that the presence of grid-connected photovoltaic systems, operating in conjunction with loads, results in an apparent increase in harmonic current content in the grid, whereas, in reality, there is a reduction in the circulating fundamental component. The obtained results indicate that conventional power flow studies may underestimate the intensity of circulating currents in the grid by neglecting the presence of harmonic components. This study innovates by assessing the circulation of harmonic components in the grid due to the combined operation of photovoltaic generation and load, considering various inverter loading scenarios and the effects of consumer electrical current, including the phase of harmonic components.
Acesso aberto (Open Access)
Investigação experimental de estratégias de controle robusto aplicadas à melhoria de desempenho de um conversor de potência CC/CC do tipo buck com estrutura Single Inductor Multiple Output
(Universidade Federal do Pará, 2024-08-05) MONTAÑO SAAVEDRA, Alvaro Christian; MEDEIROS, Renan Landau Paiva de; http://lattes.cnpq.br/8081923559538095; BARRA JUNIOR, Walter; http://lattes.cnpq.br/0492699174212608
Recently, DC/DC power converters have gained wide attention, especially in industry,telecommunications, and the control of renewable energy sources. The increase in the use of this technology can be explained by the growing demand for high-quality DC voltage regulation in various applications. Additionally, recent advances in power electronics along with control engineering have accelerated the development of DC/DC power converters. Therefore, they looked to optimize these converters in several ways, such as improving conversion efficiency and reducing their weight and cost. In the proposed work, control strategies for voltage regulation in a single-inductor, dualoutput Buck DC-DC converter system (SIDO) are investigated. Based on a nominal multiple-input, multiple-output plant model and performance requirements, both a Linear Quadratic Regulator (LQR) and a Decoupled PI control strategy are designed to control the power converter system under parametric uncertainties such as variation of the voltage source, variations of constant power loads (CPLs) and variations of load resistances. A prototype of a single inductor dual output DC-DC Buck converter was developed for experimental testing. The results indicate that the proposed LQR strategy approach is reasonable and provides adequate performance improvements in SIDO converter controllers under conditions of varying voltage source and varying load resistances, offering robust performance and system stability; however, more research is needed to address variations in constant power loads and in the design of a PI controller for its application in this kind of system.
Acesso aberto (Open Access)
Metodologia integrada utilizando sensoriamento remoto em redes neurais artificiais na quantificação do potencial de biomassa florestal na Amazônia
(Universidade Federal do Pará, 2008-04-08) ALMEIDA, Arthur da Costa; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
Pattern recognition and pattern classification in digital images is a very important skill, today. With them, it is possible to recognize and identify target objects in those images. This work proposes an integrated methodology for pattern recognition related to biomass in the Amazon tropical rainforest to extract information about bioenergetics potential for electric energy production for use with isolated Amazonian communities. To achieve this aim, information gathered about forest inventory was mixed with pattern classification and recognition in medium resolution satellite imagery such as those from LANDSAT and CBERS. The approach used in this work comes from the computational intelligence area, using artificial neural networks equipped with radial basis functions and Kohonen´s self organizing maps. The results serve as input to a geographical information system application which creates and manages a geographical database for energetic planning with renewable energy resources applicable to isolated Amazonian communities.
Acesso aberto (Open Access)
Metodologia para o projeto preliminar de edifícios utilizando otimização multiobjetivo baseada na simulação de desempenho
(Universidade Federal do Pará, 2019-12-11) ZEMERO, Bruno Ramos; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
Buildings energy consumption has a great energetic and environmental impact worldwide. The architectural design has great potential to solve this problem because the building envoltória exerts influence on the overall system performance, but this is a task that involves many objectives and constraints. In the last two decades, optimization studies applied to energy efficiency of buildings have helped specialists to choose the best design options. However, there is still a lack of optimization approaches applied to the early design stage, which is the most influential stage for the building energy efficiency over its entire life cycle. Therefore, this article presents a multiobjective optimization model to assist designers in the preliminary building design, by means of the PAES (Pareto Archived Evolutionary Strategies) algorithm with the EnergyPlus Simulator coupled, to evaluate the solutions. The search process is executed by a binary array where the array components evolve over the generations, together with the other building components. The methodology aims to find optimal solutions with the lowest constructive cost associated with greater energy efficiency. In the case study, it was possible to simulate the process of using the optimization model and analyse the results in relation to: bioclimatic principles, economic performance, environmental performance, energy performance, usability and accuracy, proving that the tool serves as support in building design. Optimal solutions achieved energy savings and operational CO₂ emissions over typical standards, as well as short-term return on investment in four different types of weather.
Acesso aberto (Open Access)
Metodologias de controle de tensão com justiça de corte da geração fotovoltaica em redes de distribuição de baixa tensão
(Universidade Federal do Pará, 2024-01-31) LOPES, Andrey da Costa; VIEIRA, João Paulo Abreu; http://lattes.cnpq.br/8188999223769913
The growing concern about climate change and global warming have motivated the current Energy Transition, which concerns the shift from fossil fuels to renewables energy sources (RES) in an effort to reduce CO2 emissions. This energy transition has driven the electrification of the economy, fostering significant growth in RES, particularly in photovoltaic solar energy. In this context, the decentralization of the electric sector has enabled the direct integration of these sources into Low Voltage Distribution Networks (LVDNs). However, the massive integration of Micro Photovoltaic Solar Generation (µPVSG) into these networks has caused reverse power flow, resulting in technical challenges such as overvoltage and thermal overload in their assets. Solutions, such as Volt-Watt Control (VWC) in Photovoltaic Inverters (PVIs), have proven effective in addressing voltagerelated issues. However, this control has led to an unfair distribution of active power among the PVIs during VWC operation, penalizing consumers located further from the distribution transformer. Additionally, stability issues related to the convergence in the dynamics of VWC, due to the slope of the Volt-Watt curve, have been considered in various studies. Therefore, this study presents a new methodology for adjusting Volt-Watt curves, ensuring the stability of VWC and simultaneously ensuring a fair power cut among PVIs. This approach is applied in two voltage control architectures, decentralized and centralized, respectively. In the first methodology, a linearized model of the network is used for Volt-Watt curve adjustment, employing local measurements at the connection points of the respective PVIs. In the second methodology, a voltage sensitivity matrix is used for the linearized model of the network when applying the Volt-Watt curve adjustment, where VWC parameters are coordinated in real-time, assisted by local measurements in the respective PVIs. The studies were conducted on a set of LVDNs and evaluated for effectiveness and fairness of power cuts quantitatively, using the Jain’s Fairness Index (JFI) as a metric. The results confirmed the effectiveness of the proposed control in mitigating voltage problems, acting fairly by equally exporting surplus energy to the grid, while ensuring controller stability. Additionally, penalties arising from the local dependence of PVIs in power cuts were eliminated compared to conventional VWC strategies.
Acesso aberto (Open Access)
Modelagem e simulação para avaliação de desempenho de sistema fotovoltaico do tipo SIGFI-45 operando com diferentes configurações
(Universidade Federal do Pará, 2023-08-14) BULHOSA, Lucas dos Santos; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259
The present work aims to evaluate the performance of a photovoltaic system of type “Sistema Individual de Geração de Energia Elétrica com Fonte Intermitente – SIGFI”, using different equipment configurations, such as photovoltaic generator and charge controller, bymodeling the system components and simulating them using Matlab/Simulink software. For validation of the developed model, monitored data was used from a real SIGFI system with a minimum monthly energy availability of 45 kWh, implanted in the external area of the “Grupo de Estudos e Desenvolvimento de Alternativas Energéticas da Universidade Federal do Pará (GEDAE/UFPA), whose electrical parameters were monitored on the dc and ac side of the system, as well as environmental parameters. Practical tests were thus carried out with different equipment configurations and the data obtained in these tests were also used to validate the results of the simulations of the model developed for the system. It should be noted the tests were designed using charge controllers with and without the Maximum Power Point Tracking (MPPT) mechanism, as well as direct coupling of the photovoltaic generator to the battery bank (self-regulated operation). After validating the model, it is possible to use the platform to simulate the operational performance of the system for different irradiance and temperature profiles using the equipment configurations considered, and also operating with different load curves and different initial state of charging of the battery bank. Among the various simulations carried out, the best results were obtained for the case with a MPPT mechanism, modules with 60 cells and when consumption peaks are close to the photovoltaic production peak, reaching results where 58% of the load was supplied directly by the photovoltaic generation
Acesso aberto (Open Access)
SIS2GER e SISGAE2B formando um ecossistema de soluções para gerenciamento de indicadores elétricos, ambientais e financeiros em sistemas de geração fotovoltaica e de armazenamento de energia
(Universidade Federal do Pará, 2023-06-06) CARVALHO, Izídio Sousa de; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
Currently, there is a growing demand for electricity in several countries around the world, this increase is driven by the greater amount of electrical and electronic equipment connected to the electrical grid in homes, as well as the use of new machinery by industry. Given the constant increase in the demand for electrical energy, the generation of electrical energy has also increased, mainly using renewable sources. Following the world trend, Brazil has been going through an energy transaction process, using renewable sources such as solar and wind, mainly. And in this context we have the present work, aiming at the development and implementation of software to form a computational ecosystem, containing several types of connected systems, being part of the Research and Development Project (R&D) of the Integrated System of Multimodal Electric Mobility (SIMA ), based on the pilot project of a smart city implemented in Cidade Universitária Professor José Silveira Netto of the Federal University of Pará (UFPA) to study the impact of implementing an infrastructure of this size, originated through call nº 22/ 2018 by ANEEL and nominated as head of series within ANEEL's Innovation Chain. Based on this context, this work proposes the development of two management software for renewable energy generation systems and electrical energy storage systems, since, through good monitoring and management, it is possible to increase efficiency, safety and power quality of a given system. For the development of the software, technologies were used that provided the systems with scalable and easy-to-implement systems, such as Docker, for building the development and production environments; the Laravel framework, for coding the software; and the DOJOT Middleware for storing measurement data for each managed system.
Acesso aberto (Open Access)
Sistema de monitoração e estimativa da produção de energia elétrica de sistemas fotovoltaicos conctados à rede na edificação do GEDAE/PARÁ
(Universidade Federal do Pará, 2023-08-22) SILVA, Yan dos Santos; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259
This master's thesis presents the development of mechanisms for monitoring and estimating the electricity production by Grid-Connected Photovoltaic Systems (GCPVS) installed in the building of the Grupo de Estudos e Desenvolvimento de Alternativas Energéticas at the Universidade Federal do Pará (GEDAE/UFPA). The research involves the operational evaluation of the AC side of the GCPVS connected to partial and general electric panels, which are used to aggregate a set of GCPVS and to obtain records from the electrical multi measurement meters via a local monitoring tool. Additionally, the research involves the development of a web-based remote monitoring system for operational monitoring and simulations aimed at estimating the electricity production of the GCPVS. This is achieved by using mathematical models and meteorological data collected through a weather station installed at GEDAE/UFPA, on-site data loggers (as an alternative means of obtaining irradiance and temperature data), and data provided by the National Aeronautics and Space Administration (NASA) platform to fulfill in any gaps caused by system monitoring failures. The results indicate the reliability of the GCPVS measurements in partial panels but also highlight the need to reactivate inoperative systems and implement new systems to improve measurement accuracy in the overall panel. Furthermore, on average, the GCPVS contribute to about 25% of the electricity consumption in the GEDAE/UFPA building, resulting in significant energy cost savings from 2011 to 2023. However, greater savings could be achieved through the restoration of some systems, emphasizing the importance of restoration measures and continuous monitoring of systems performance to increase energy contribution and economic benefits from the use of GCPVS.
Acesso aberto (Open Access)
Tecnologias de propulsão elétrica aquaviária: projeto conceitual de embarcação híbrida com foco em atendimento as práticas ambientais, sociais e de governança (ESG)
(Universidade Federal do Pará, 2023-09-14) LIMA, Fernanda Costa de; FONSECA, Wellington da Silva; http://lattes.cnpq.br/5066230825214516
Research into the naval electric mobility system has made a significant contribution to the waterway energy transition. This research investigates electric propulsion technologies as a solution for sustainable waterway mobility. The proposal involves modifying the conventional combustion propulsion system to an electric system, equipped with photovoltaic modules to make it more efficient. The purpose of the boat is to make short journeys, transporting tourists along the coast of the Guajará River, located in the Eastern Amazon region of Belém/Pará. Based on the description of the conceptual project, the forecasts and impacts of electric boats on the maritime industry were analysed, specifically considering the dependence on Rare Earth Elements to produce high-tech naval electrics. The electrification proposal illustrates the main technologies of the maritime sector, which include: lithium-ion battery banks, electric motors, and photovoltaic modules. The methodology consisted of technical visits using a semi-structured questionnaire to obtain information about the modal and a survey of local irradiation. Based on the sizing of the system, it showed the benefits of electric propulsion in terms of energy efficiency, economic viability, and reduction of the project's GHG emissions. However, one of the major challenges is methodological feasibility and preserving the magnetic properties to return to the production chain. It is important to emphasise that ESG analysis is fundamental for identifying potential environmental and social risks associated with mineral criticism applied to marine EVs. It also allows for the development of mitigation strategies, encourages innovation in sustainable production processes and promotes the adoption of best practices in the industry. Taking these aspects into account contributes to building a responsible and fair supply chain. Although there are challenges of economic viability and stakeholder strategies, the recovery of these materials could be a significant source of supply for a certain period to accelerate the process of just energy transition.

Navegar

Navegando Programa de Pós-Graduação em Engenharia Elétrica - PPGEE/ITEC por Linha de Pesquisa "FONTES RENOVÁVEIS"