https://tede.unioeste.br/handle/tede/1065 Sat, 25 Apr 2026 14:59:52 GMT 2026-04-25T14:59:52Z https://tede.unioeste.br/handle/tede/7171 Title: Contribuição e equalização de estados de carga de baterias e ao compartilhamento de potência em microrredes CC Autor: Beck, Marlon Felipe Primeiro orientador: Aguiar, Cassius Rossi de Abstract: This dissertation presents the development of a decentralized control and management framework for a direct current (DC) microgrid with two DC-DC converters, proportional-integral (PI) controllers, and an equalization function referred to as k-sliding. The main objectives are energy management and state-of-charge equalization. The equalization function ensures uniform charging and discharging of energy storage elements. Through the adjustment of these functions, the study aims to enhance the overall performance and longevity of the microgrid, maximizing the utilization of energy storage and mitigating issues such as cell degradation. The k-sliding function, designed to equalize the battery state of charge, allows operation with a prioritized system for restoring the DC link voltage or equalization, providing flexibility and efficiency to the microgrid. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação Wed, 21 Feb 2024 00:00:00 GMT https://tede.unioeste.br/handle/tede/7171 2024-02-21T00:00:00Z https://tede.unioeste.br/handle/tede/3002 Title: Metodologia para determinar uma resolução espacial para estudos de previsão espacial de demanda Autor: Apolinário, Diego Diéferson Primeiro orientador: Carreño Franco, Edgar Manuel Abstract: The spatial electric load forescating aims to determine the sapatial and temporal distribution of the growth of electricity demand in the service area of a distribution utility. This information is vital to support the process of decision making in planning the expansion and operation of dostribution networks in the medium and long term. Currently there are many methodologies that can perform spatial load forecasting, among these cell models hace been the most widely used in recent years. Moreover, these models need to be calibrated with information concerning the data in the studied region and one of these information is the spatial rsolution. This work presents a partitioning method, using a divisive algorithm, to crate homogeneous grid cells for cellular models used in saptial electric load forecasting, and thereby determine a spatial resolution that allowa for proper display and inference from the obtained at ffeder ordistribution transformer levels. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação Fri, 13 Sep 2013 00:00:00 GMT https://tede.unioeste.br/handle/tede/3002 2013-09-13T00:00:00Z https://tede.unioeste.br/handle/tede/1090 Title: Estudo numérico e experimental da dinâmica não-linear de um giroscópio Autor: Silva, Rosiney Desidério da Primeiro orientador: Silva, Samuel da Abstract: The present work proposes a study of the dynamics of a gyroscope using simulated data of an analytical model by comparing with experimental data. Classical mechanical modeling approaches are used to identify the equilibrium points, stability and verification of the regions where the motion equations of the gyroscope can present regular or chaotic behavior. The Lyapunov exponents are identified through the standard method, Eckmann-Ruelle Method, Wolf method with time series and the 0-1 test. The results achieved illustrate the main advantages and drawbacks of each method and allow to observe qualitatively and quantitatively information about the motion of the gyroscope used. Publisher: Universidade Estadual do Oeste do Parana Tipo do documento: Dissertação Mon, 26 Nov 2012 00:00:00 GMT https://tede.unioeste.br/handle/tede/1090 2012-11-26T00:00:00Z https://tede.unioeste.br/handle/tede/1089 Title: Análise numérica e experimental de geradores piezelétricos de energia Autor: Clementino, Marcel Araujo Primeiro orientador: Silva, Samuel da Abstract: The use of piezoelectric devices to harvest vibration energy has found applications in several areas, especially in structural health monitoring, either to recharge batteries or to directly feed sensors and also electronic devices. In general, the practical use of the energy converted by these devices requires, first, converting the alternating current (AC) produced to direct current (DC). This is normally done by using rectifier circuits. However, modeling the harvesting system, usually a PZT sensor bonded on a cantilever micro-beam and coupled to a rectifier circuit, using the same software package is pointed out by some authors as a drawback to overcome, due to its multidisciplinary requirements, involving topics of both mechanical and electrical engineering. In this sense, the main goal of this dissertation is to describe a comprehensive and simple modeling strategy, which considers a single computational platform and, simultaneously, account for both the electromechanical model of a clamped piezoelectric beam and the practical energy harvesting circuit, seeking ways to facilitate the analysis and design of energy harvesting systems. Numerical simulations and experimental tests are performed to illustrate the proposed approach, considering a full-wave diode bridge as the non-controlled rectifier circuit and a resistive load, which are directly connected to the cantilevered piezoelectric beam. Additionally, experimental tests carried out with a commercial harvesting system are presented, aiming to characterize and compare its performance with a full-wave diode bridge and a resistive circuit, both developed by the author. A single degree of freedom model of this system is also presented. The results showed that the model is suitable to perform simulations of systemshaving the characteristics described in this dissertation and confirmed the need of using active circuits to better use the produced energy. Publisher: Universidade Estadual do Oeste do Parana Tipo do documento: Dissertação Fri, 01 Mar 2013 00:00:00 GMT https://tede.unioeste.br/handle/tede/1089 2013-03-01T00:00:00Z