Navegando por Assunto "Energy storage"

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Acesso aberto (Open Access)
Desenvolvimento e modelagem de uma nanorrede de distribuição em corrente contínua em baixa tensão com sistemas de geração distribuída
(Universidade Federal do Pará, 2019-10-23) TORRES, Pedro Ferreira; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
The concept of direct current distribution minigrids has been gaining ground in academia and industry regarding the development of distribution grid applications with high penetration of distributed energy sources and storage systems. The adoption of a direct current distribution system facilitates the integration of sources such as photovoltaic and wind generation and storage systems such as batteries, as these technologies in general operate intrinsically in direct current. This work presents the development of a direct current distribution nanogrid (DCDN) installed in the laboratory of the Grupo de Estudos e Desenvolvimento de Alternativas Energéticas (GEDAE), of the Universidade Federal do Pará. The developed grid is composed of three photovoltaic generation and storage systems in battery banks and three load banks, distributed over the 200 m grid in a ring topology, with a 24 Vdc bus. Two simulation methodologies were developed and are capable of reproducing the nanogrid’s operational behavior under static and dynamic conditions, allowing the evaluation of the grid performance over a day of operation. Tests are also presented with measurements at strategic points of the grid to evaluate the system behavior under specific operating conditions, being normal or under contingency. The results attest the nanogrid's ability to reliably supply the loads, as long as it respects the limitations of the implemented power generation and storage capacities. In addition, it was found that the characteristics related to the topology of the commercial charge controller that is used to form the DC distribution nanogrid benefits the power quality for the developed grid size and topology.
Acesso aberto (Open Access)
Gestão de armazenamento de energia integrado com fontes renováveis e intermitentes
(Universidade Federal do Pará, 2023-07-13) MORAES, Wuanda Letícia da; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813
This work address the configuration of energy storage integrated to intermittent renewable sources, especially photovoltaic systems, connected to the electricity distribution network. This is the result of the Research and Development Project, “Multimodal Electric Mobility Intelligent System (R&D) Applied in the Amazon Region (SIMA)”, developed at the Amazon Energy Efficiency Center (CEAMAZON), where there is a mini electric network with photovoltaic generation, diesel generation, electric vehicles charging stations, energy storage and coupling point with the CA network of the university city Prof. Dr. José da Silveira Netto, of Federal University of Pará. The mini electric network management is accomplished by a hybrid inverter associated with a load controller, capable of informing and managing the power that is being generated by the FV arrangements, the charging state of the battery bank, which also has its own management, through the BMS (Battery Management System); and the power being injected into the AC bus. With the case study, management strategies were defined through demand-side energy management, time shift, with a 55% reduction in the total cost of the 2022 annual bill for the CEAMAZON building. In addition, an economic feasibility analysis was presented through the tip load factor (FCp) with PDE 2032 VLP , arriving at a positive and justifiable result for application. Finally, a carbon exchange analysis arrived at a sustainability equivalent of 11 trees typical of the Amazon rainforest cultivated for the total emissions avoided in 2022 in the university city; and a carbon credit 298.43 tCO2, corresponding to R$ 131,902.4 for the carbon market.