Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Sistemas elétricos"”.
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Análise exergética em sistemas elétricos
… a análise exergética na adoção de carros elétricos em substituição aos de passeio movidos a gasolina das regiões brasileiras (Centro-Oeste, Sul, Sudeste, Norte e Nordeste) e propuseram-se ações de gerenciamento do lado da demanda como remanejamento de chuveiros do horário de ponta, …
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Adaptação do sistema elétrico brasileiro às mudanças climáticas: estratégias e perspectivas
… a segurança energética e a resiliência dos sistemas elétricos em todo o mundo. No contexto brasileiro, o setor elétrico desempenha um papel fundamental na economia e no bem-estar da população, tornando essencial a compreensão e o enfrentamento dos impactos das mudanças climáticas nesse …
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Comparação de dois métodos de detecção da instabilidade de tensão baseados em medição fasorial e equivalente de Thévenin
Evaluation and comparison of two methods for voltage stability assessment in power systems. They are the Topological Monitoring Method Duong (MBTDUONG) and the Adaptive Identification Method Corsi-Taranto (MBM-CT). Both algorithms have a characteristic of using phasor measurements from PMUs to make …
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Improving rational modeling realization for accurate EMT simulations
Time-domain simulations carried out with linear multistep integration methods, such as the Trapezoidal Rule, are subject to an error often neglected in electromagnetic transient (EMT) analyses, known as Frequency Warping. This thesis establishes the frequency warping as a fundamental problem that …
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Controle de amortecimento de oscilações eletromecânicas utilizando unidades eólicas do tipo DFIG
The use of renewable energy sources for the production of electric energy is gaining more and more space in the world scenario, due to the great concern with environment, for example. Due to the evolution in technologies and large investments in recent years, the Wind Energy sector is increasingly …
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Análise de zeros atrasados em unidades offshore
High asymmetric currents are expected to appear in electrical systems, whenever a short circuit occurs somewhere nearby electric generators buses. In the case of offshore production platforms, the so called asymmetry, along with other specific conditions, may give rise to the so called “delayed …
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Gerenciamento de potências usando um conversor modular em cascata para veículos elétricos com células a combustível
Proposes a power management strategy based on pq-Theory for fuel cell and electric vehicle applications. Using a modular cascaded converter topology, more than one power source can be combined with capacitors to supply active and reactive power in an efficient manner to the electric motor. The …
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Sistemas de proteção para redes de distribuição elétrica submarinas não aterradas
In the offshore world, the need for pumping expansion and subsea processing has been increasing in recent years mainly due to the search for optimization of resources and space in the platforms, in addition, a lot of cases, the subsea pumping is the only feasible of production projects. Thus, in …
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Long-term power systems integration using OSeMOSYS SAMBA - South America Model Base - and the bargaining power of countries : a cooperative games approach
This study intends to contribute to a better understanding of both advantages and drawbacks of power systems interconnection processes in South America. Based on data available in national and international reports, scenarios for the power supply sector expansion were modelled in the Open Source …