https://repositorio.ifg.edu.br/handle/prefix/96 Mon, 21 Sep 2026 09:13:29 GMT 2026-09-21T09:13:29Z https://repositorio.ifg.edu.br/handle/prefix/2563 Título: Estimação de parâmetros de transformadores de potência em regime permanente utilizando o algoritmo Mean-Variance Mapping Optimization (MVMO) Autor(es): Silva, Maylon Pereira Primeiro Orientador: Lemes, Francisco Rodrigues Abstract: This undergraduate thesis presents the application of the Mean- Variance Mapping Optimization (MVMO) algorithm for estimating electrical parameters of power transformers under steady-state operation. Accurate identification of these parameters is essential for adequate representation of electrical behavior in performance studies, loss analysis, protection schemes, and power system reliability assessments. The proposed methodology is based on the modeling of the single-phase equivalent circuit referred to the primary side, incorporating resistances, series reactances, and magnetizing branch parameters. Parameter estimation is formulated as an optimization problem in which MVMO minimizes the error between measured and calculated electrical quantities from operational data. The method is evaluated on three transformers with different power ratings (2 kVA, 15 kVA, and 33 MVA), comparing its performance with five well- established algorithms: Genetic Algorithm, Particle Swarm Optimization, Gravitational Search Algorithm, Bacterial Foraging Algorithm, and Caothic Optimization Algorithm. Results demonstrate good performance of MVMO, with parameter errors lower than 0.2% for the 15 kVA and 33 MVA cases, establishing it as a viable alternative for parametric identification of transformers across different power scales. Editor: Insitituto Federal de Educação, Ciência e Tecnologia de Goiás Tipo: Trabalho de Conclusão de Curso Wed, 14 Jan 2026 00:00:00 GMT https://repositorio.ifg.edu.br/handle/prefix/2563 2026-01-14T00:00:00Z https://repositorio.ifg.edu.br/handle/prefix/2535 Título: Eficiência energética para instituição pública com foco no IFG Câmpus Jataí Autor(es): Morais, Allan Carlos Barbosa; Guimarães, Michael Belo Primeiro Orientador: Pereira, Fernando Silva Abstract: Energy efficiency in the public sector is fundamental for economic and environmental sustainability. This work presents an energy diagnosis conducted at the Federal Institute of Goiás (IFG) – Jataí Campus, aiming to identify causes of inefficiency and propose technical solutions for cost reduction and consumption optimization. The methodology was characterized as a quantitative case study, structured in four stages: tariff analysis, measurement of electrical quantities and power quality using a power quality analyzer (Fluke 1738), evaluation of the existing photovoltaic generation system, and an inventory of air conditioning loads. The diagnosis results revealed an underestimation of the contracted demand, generating recurring penalties, as well as a marked current imbalance between phases and a solar generation deficit of approximately 67% to achieve self- sufficiency. It was also identified that the air conditioning system, composed mostly of conventional equipment, is the main driver of peak consumption. In conclusion, the study recommends adjusting the contracted demand to 107 kW while maintaining the Green tariff, replacing the air conditioning system with inverter technology, and the strategic expansion of the photovoltaic system considering the tariff adjustment factor for Group A consumers. Editor: Insitituto Federal de Educação, Ciência e Tecnologia de Goiás Tipo: Trabalho de Conclusão de Curso Mon, 08 Dec 2025 00:00:00 GMT https://repositorio.ifg.edu.br/handle/prefix/2535 2025-12-08T00:00:00Z https://repositorio.ifg.edu.br/handle/prefix/2353 Título: Desenvolvimento de um gêmeo digital para um braço robótico com três graus de liberdade Autor(es): Souza, Eliseu Gonçalves Primeiro Orientador: Mendonça, Kennya Resende Abstract: This Final Undergraduate Project presents the development and simulation of a digital twin of an articulated robotic arm, using the integration between SolidWorks and MATLAB/Simulink platforms, through the Simscape Multibody environment. The main objective is to create a detailed virtual representation of the physical manipulator, capable of reproducing its kinematic and dynamic behavior in real time, enabling high-fidelity testing of control and trajectory planning strategies. The mechanical model was initially built in SolidWorks, with custom-designed parts structured to enable three rotational degrees of freedom. After full assembly, the robot was exported to MATLAB in XML format using the Simscape Multibody Link tool. From this model, a physical schematic of rigid bodies and revolute joints was automatically generated, compatible with multiscale simulations. Subsequently, functional blocks were implemented in Simulink for generating Cartesian space trajectories using 4×4 homogeneous transformation matrices, along with inverse kinematics algorithms that converted desired poses into joint angles. Feedback control was performed using PID blocks connected to angular error comparators, enabling independent control of each joint. The integration of all components resulted in a functional digital twin, tested with various trajectories and validated in terms of accuracy and stability. The developed model contributes to advancing applications in automation, education, and the development of digital prototypes in the fields of robotics and cyber-physical systems. Editor: Insitituto Federal de Educação, Ciência e Tecnologia de Goiás Tipo: Trabalho de Conclusão de Curso Thu, 24 Jul 2025 00:00:00 GMT https://repositorio.ifg.edu.br/handle/prefix/2353 2025-07-24T00:00:00Z https://repositorio.ifg.edu.br/handle/prefix/2352 Título: Estudo do Efeito Ferranti na linha de transmissão 230 kV : Inocência – Rio Verde do Norte utilizando o ATPDraw Autor(es): Moraes, Gusttavo Gutierry Ferreira Primeiro Orientador: Rezende, Jaqueline Oliveira Abstract: This work aims to analyze the behavior of a 230 kV transmission line segment, focusing on the phenomenon known as the Ferranti Effect. Calculations will be performed to demonstrate the phenomenon and to determine the values required for compensation using shunt inductive reactors. Subsequently, computer simulations of the transmission system will be performed. The total length of the line is 508 km. The simulations will be conducted using the ATPDraw software, based on real data provided by the local electricity company. The simulations will be divided into two main scenarios: Scenario 1, with the line operating under no-load conditions without inductive compensation; and Scenario 2, with the line operating under no- load conditions with inductive reactors. Through these analyses, it will be possible to observe the Ferranti Effect and evaluate the effectiveness of reactive compensation. Editor: Insitituto Federal de Educação, Ciência e Tecnologia de Goiás Tipo: Trabalho de Conclusão de Curso Thu, 10 Jul 2025 00:00:00 GMT https://repositorio.ifg.edu.br/handle/prefix/2352 2025-07-10T00:00:00Z