Student: JÔNATAS NASCIMENTO DA SILVA

Title: ANÁLISE DA ADEQUAÇÃO DE SISTEMAS FOTOVOLTAICOS NAS MESORREGIÕES DE PERNAMBUCO: ESTUDO DA TAXA DE DESEMPENHO VERSUS FATORES DE IMPLANTAÇÃO

Supervisor: PROF. DR. JORNANDES DIAS DA SILVA

Co-supervisor: PROF. DR. DEIVSON CESAR SILVA SALES

External Examiner: PROF. DR. SÉRGIO MÁRIO LINS GALDINO

Internal Examiner: PROF. DR. MANOEL HENRIQUE DA NÓBREGA MARINHO

Date: March 04th, 2024

Time: 14:30

Place: Room I4

Abstract: 

This work aims to provide information and propose an analysis criterion through the comparison between performance ratio and deployment factors of different photovoltaic systems technologies, in order to assist decision-making regarding the choice of the most suitable system for each mesoregion in Pernambuco. Pernambuco was chosen because it is an extremely favorable region for photovoltaic energy generation and because it has mesoregions with different characteristics that will greatly contribute to the research. The performance ratio was chosen as a relevant variable because it seeks to assess system losses not only based on cell efficiency but also on losses related to installation method and site-specific peculiarities. Deployment factors were defined considering economic aspects, based on the type of PV technology used, in which the following parameters were established: total area occupied by each system, cost of photovoltaic modules, market supply availability, and equipment lifespan. Regarding the applied methodology, a quantitative approach was adopted for data exploration and a qualitative analysis of results, through procedures such as data collection, tabulation, construction of technology rankings in each mesoregion, and technical analysis of results. According to the criteria used in this research, it was possible to observe that silicon-based mono and polycrystalline technologies achieved the best results, with particular emphasis on monocrystalline technology (m-Si), which, even though it did not achieve the best performance rate in some mesoregions, demonstrated to be the technology with the most advantageous deployment. Finally, it was possible to define parameters indicating which system is most suitable for each mesoregion, considering both the technical aspects of each technology and the economic deployment factors of each.

Keywords: Solar Energy; Photovoltaic Systems; Performance Ratio; Technologies; Implementation Factors.

EXAME DE QUALIFICAÇÃO - BANCA 03

Discente: LUCAS DE CARVALHO SOBRAL

Título: ANÁLISE DA VIDA ÚTIL DE INVERSORES DE SISTEMAS FOTOVOLTAICOS SUBMETIDOS A SURTOS ELÉTRICOS DE ALTA TENSÃO

Orientador: PROF. DR. GUSTAVO OLIVEIRA CAVALCANTI                             

Banca Examinadora: PROF. DR. FRANCISCO MADEIRO BERNARDINO JUNIOR

                                     PROFA. DRA. MARIA DE LOURDES MELO GUEDES ALCOFORADO

Data: 16 DE NOVEMBRO DE 2023

Horário: 9:30

Local: On-line - Link:  https://meet.google.com/jen-zyjk-hjg

Student: GLEYSE KELLY DA SILVA

Title: PROJETO ENERGETICAMENTE EFICIENTE DE REDES ÓPTICAS OTN

Supervisor: PROF. DR. CARMELO JOSÉ ALBANEZ BASTOS FILHO

External Examiner: PROF. DR. LUIZ HENRIQUE BONANI DO NASCIMENTO

Internal Examiner: PROFA. DRA. VERUSCA SEVERO DE LIMA

Date: October 11th, 2023

Time: 08:00

Place: Online 

Abstract: 

With the evolution of communication networks and a growing demand for Internet services, there is a need for suitable infrastructure capable of providing higher transfer rates. An important consideration is the necessity to ensure the network’s survivability, especially since it is used for handling large volumes of traffic. The main goal of this thesis is to bring improvements to a resilient Optical Transport Network (OTN) design over Dense Wavelength Division Multiplexing (DWDM), considering multiple objectives. These objectives include cost minimization by reducing the number of interfaces, which is one of the most expensive components in an OTN network planning. Additionally, the thesis aims to minimize Failure Restoration Rate and energy consumption. This is crucial, particularly in telecommunications environments where data traffic is constantly increasing, and operators seek to optimize their resources. Consequently, we compare the performance of four multi-objective algorithms in the design of resilient OTN networks over DWDM, considering two different network topologies. One topology consists of four nodes and seven link bundles, while the other comprises 16 nodes and 32 link bundles. We observed that the OMOPSO and SMPSO algorithms yielded better results in terms of Hypervolume, converging first for topology 1. For topology 2, the HYPE algorithm pro- duced more satisfactory results, demonstrating that it is possible to minimize objectives through effective planning and efficient algorithms.

Keywords: Optical Networks; OTN/DWDM; Planning; Multiobjective Algorithms; Resilient; Energy Consumption.