Engenharia Elétrica (UACSA)

URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2922

Siglas das Coleções:

APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso

Navegar

Agora exibindo 1 - 6 de 6

Análise de índices de qualidade da energia elétrica considerando uma planta de geração eólica localizada no norte da Bahia
(2022-05-27) Paiva, Jefferson; Alves, Denis Keuton; http://lattes.cnpq.br/7109075850257262; http://lattes.cnpq.br/2113363156474260
This study proposes a comparative assessment of the leading indicators of power quality measured in a wind farm located in the north of the state of Bahia. The integration of wind farms in the electric power system presents challenges related to the power quality, whose indicators must follow the standards defined as desirable. This fact highlights the importance of monitoring electrical power quality indicators, emphasizing phenomena, parameters, and reference values regarding steady-state voltage, power factor, harmonic distortion, voltage imbalance, voltage fluctuation, short duration, and frequency variation. The power quality indicators were evaluated according to the limits defined in Brazilian standards: Procedimentos de Distribuição de Energia Elétrica no Sistema Elétrico Nacional, established by the Agência Nacional de Energia Elétrica, through normative resolution No. 956/2021; Procedimentos de Rede, prepared by the Operador Nacional do Sistema Elétrico, through normative resolution No. 903/2020. The measurement of electrical quantities was performed using a PowerLogic® energy analyzer, model ION7650, manufactured by Schneider Electric, which is also responsible for measuring the plant's electricity production billing. The analysis of the quality of electric energy is carried out in the generation bus of the enterprise's substat. The recorded values of the measured electrical quantities were satisfactory for presenting a diagnosis capable of evidencing problems related to the power quality.
Análise e controle de distorções harmônicas utilizando modelagem com filtros passivos
(2024-03-11) Santos, Fernanda Maria Vanderlei; Alves, Denis Keuton; http://lattes.cnpq.br/7109075850257262; https://lattes.cnpq.br/1585511995867132
With the evolution of power electronics for the control and optimization of industrial flows and processes, challenges related to the quality of electrical energy have become more prominent, especially harmonic distortion. Therefore, understanding the main causes, impacts, and fundamental mitigation strategies becomes crucial to ensure that an electrical system operates with maximum quality and efficiency. In industrial environments, where frequency inverters are used for motor control and nonlinear rectifiers are employed to convert alternating current into direct current to power a variety of electronic devices, the presence of distorted content in current and voltage signals has become increasingly common. These distortions can result in problems such as overheating of transformers and cables, failures in sensitive electronic equipment, among other disturbances. Thus, this work proposes a theoretical and simulated study on harmonic distortions present in a load with a three- phase rectifier, with a focus on the application of a passive shunt filter to attenuate the harmonic content of the system. The use of passive filters offers a significant cost-benefit ratio, as the investment required for their implementation is relatively low compared to other approaches. Additionally, these filters have the ability to select and eliminate specific harmonics, which were previously calculated in the design phase. With the completion of this study, the aim is to achieve a system with controlled harmonic indices, thus validating the effectiveness of the methodology under analysis.
Desafios e impasses para consolidação da geração eólica offshore na Matriz Energética Brasileira
(2023-05-02) Lima, Polliany Alves de; Alves, Denis Keuton; http://lattes.cnpq.br/7109075850257262; http://lattes.cnpq.br/1066593549053161
The increase in energy demand and its environmental concerns have increased the search for alternative energy sources. In Brazil, onshore wind generation is already consolidated and has proven efficient to complement the energy supply, especially in dry periods, when hydroelectric reservoir levels are low. Once the potential of the onshore wind resource has been exploited, environmetal agencies along with the brazilian energy sector must come together to better investigate the brazilian marine wind potential. Although it has been proven that the potential of offshore wind power generation is higher than that presented in onshore wind generation, Brazil does not yet have any wind projects installed in the marine environment. Thus, this work seeks to unravel the main chellenges and impasses that the brazilian offshore wind generation will have to face to install the first turbines at the sea. For this end goal, the areas with the greatest potential for offshore wind power generation will be indentified, the main structures that make up wind farms in marine environment, the impacts linked to offshore technology and how european countries have managed to circumvent the obstacles shall be used as current references in offshore wind generation.
Desenvolvimento de Estudo de Proteção para Conexão de uma Usina fotovoltaica de 1.194kWp
(2023-09-21) Oliveira, Maria Eduarda Araújo de; Alves, Denis Keuton; Ando Júnior, Oswaldo Hideo; https://lattes.cnpq.br/7109075850257262; https://lattes.cnpq.br/8911684468319565
The generation of photovoltaic energy presents a different profile from the generation of conventional energy (hydroelectric). This is due to the characteristics inherent to the photovoltaic generation process, such as intermittent generation, in which fluctuations in energy generation occur, adding greater complexity to the protection system. Therefore, this work analyzes current regulations and recommendations for preparing a study on the protection and selectivity of photovoltaic generators. This work used a real case study with a 1MW generator connected to the local utility through a coupling transformer and inverters. The protections and adjustments were selected to assess the reliability of the proposed generator and ensure connection to the distribution network with the minimum quality parameters required by regulations. From the results obtained, it was verified through graphic analysis of the coordination that the method used was effective in the protection and selectivity study, attending to current regulations.
Proposta de melhoria de processo utilizando metodologias ágeis em um setor de manutenção eletroeletrônico
(2024-03-05) Leal, Tárcia Laise Souza Viana; Alves, Denis Keuton; http://lattes.cnpq.br/7109075850257262
This paper aims to analyze and propose the application of agile methodology in the management of electro-electronic maintenance process, also seeking to enhance the efficiency and quality of services provided. To achieve this goal, specific objectives were established. Initially, a literature review was conducted on maintenance and its historical context, focusing on the management of maintenance process using Kanban and agile methodologies, as well as their application in the maintenance context. This review identified challenges faced when using traditional approaches in this type of management. Subsequently, successful cases of companies that adopted agile methodology in the management of maintenance process were analyzed to investigate the benefits achieved with this approach. This analysis was compared with other traditional approaches, highlighting their differences, advantages, and disadvantages. Based on this information, a practical application of agile methodology was proposed in an electro-electronic maintenance process of a telecommunications company, considering the sector’s peculiarities and customer needs. To assess the feasibility and potential impact of applying agile methodology to the electro-electronic maintenance process, detailed studies and analyses were conducted. Finally, the work culminated in the development of guidelines and recommendations for the implementation of agile methodology in the management of maintenance processes, aiming to provide a solid foundation for other organizations to adopt this approach efficiently and effectively. The results obtained in this research will contribute to understanding the benefits of agile methodology in the management of electro-electronic maintenance processes, highlighting its relevance and potential to drive improvements in the field, thereby increasing companies’ competitiveness in the market.
Sistema de monitoramento IoT de energia conectado à internet via ESP32
(2023-09-19) Silva, Sóstenes Melo Vitoriano da; Alves, Denis Keuton; http://lattes.cnpq.br/7109075850257262; http://lattes.cnpq.br/0583643383865002
Because of technological development in recent decades, it has become increasingly common to use smart devices in everyday life. The concept of pervasive computing explains this phenomenon by proposing to integrate the virtual world with the physical world, making technology dissociable and imperceptible to the development of people's daily activities. In this way, the concept of IoT (Internet of Things) has emerged, fostering a wave of upgrades in common devices that are used in our daily lives. Equipped with computing capabilities, devices now produce massive amounts of data, creating a favorable environment for applying big data techniques in the process of storing and analyzing data. Immersed in this context, this study aims to develop an IoT-based monitoring system that uses MQTT (Message Queuing Telemetry Transport) communication to establish remote supervision of any measurement device connected to the broker, storing samples of the measurement of electrical quantities in the Firebase Realtime Database to allow instant access to the data via a remote monitoring web page. The results have been demonstrated the effectiveness of the combination of the MQTT protocol, the ESP32 device, and the Firebase database through the analysis of processing time and efficiency in the storage of information.