9 documents found, page 1 of 1
Overvoltage protection for grid-connected picohydro generation using photovolta...
Scotta, Isabella Cristina; Maidana, Wellington; Leite, VicenteVery small-scale hydropower plants are environmentally friendly and renewable resource-based innovative solutions. The interest in pico-hydro systems (up to 5 kW) has increased significantly from the first stand-alone applications, at remote sites, to the distributed generation, with the injection of generated energy into the grid. Recently, there have been advances in the grid connection of these systems using...
Soiling monitoring modelling for photovoltaic system
Pagani, Vitor Henrique; Los, Nelson Anthony; Maidana, Wellington; Leitão, Paulo; Casaro, Marcio M.; Nascimento, Claudinor B.Soiling on photovoltaic panels is a factor that has a significant impact on the photovoltaic production. The monitoring of the soiling index appears as a relevant alternative for the maintenance of solar systems. This work proposes a soiling index modelling for photovoltaic systems based on two input variables, namely the solar radiation and the generated current, providing a simple, programmable and reliable w...
Modular data acquisition architecture for thin-film sensors surfaces
Rodrigues, Nelson; Lima, José; Rodrigues, Pedro João; Carvalho, José Augusto; Laranjeira, Jorge; Maidana, Wellington; Leitão, PauloThin-film sensors surfaces are becoming popular to collect data in several specific and complex processes, namely plastic injection or metal stamping, allowing the digitization of such processes through the use of Internet of Things technologies. A particular challenge in such thin-film sensors surfaces is the data acquisition and signal conditioning system, which implementation is complex due to the characteri...
Implementation of a smart microgrid in a small museum: the silk house
Figueiredo, Luís Guilherme Aguiar; Maidana, Wellington; Leite, V.Microgrids are an alternative approach for the supply of energy integrating decentralized power sources, electrical loads, energy storage, and management in a local grid. The system has the capability of power control and energy management using communications’ network between all devices, and is known as smart microgrid. This paper presents the implementation of a smart microgrid in the Silk House, a museum de...
Over-voltage protection for pico-hydro generation using PV microinverters
Scotta, Isabella Cristina; Ribeiro, Gabriela Moreira; Maidana, Wellington; Leite, V.Innovative, low-cost, environmentally friendly and renewable resource-based solutions are emerging to meet growing global energy demand. Hydroelectric technology is quite old and mature. Despite its importance, it is associated with large plants, with environmental impact. On contrary, small-scale systems, called pico-hydro systems (up to 5 kW) are not yet explored. Anyway, the exploration of pico-hydro systems...
Grid connection approach for very small-scale pico-hydro systems using PV micro...
Ribeiro, Gabriela Moreira; Maidana, Wellington; Leite, V.; Ferreira, Ângela P.The use of renewable energy sources has grown significantly in recent decades, with emphasis on resources that have a low environmental impact in the energy production process. Small-scale pico-hydro systems have great potential and are also in line with increasing environmental requirements.
Photovoltaic water pumping system for small power conventional AC pumps
Tangerino, Bruno Henrique Boschetti; Roman, Dionizio José Vargas; Leite, V.; Goedtel, Alessandro; Ferreira, Ângela P.; Batista, JoséThe interest of photovoltaic (PV) water pumping systems with standard components is increasing as a low cost and independent solution over dedicated systems. However, one of the challenges of this alternative is the fact that small power systems to drive power pumps require a small number of PV modules and the PV string voltage is, usually, not enough to feed the frequency converter. This paper presents an appr...
Conceção de um sistema autossustentável para um edifício de divulgação de ciênc...
Maidana, WellingtonA presente dissertação tem como objetivo apresentar a conceção de um sistema autossustentável baseado em fontes de energia renováveis - hidrelétricas e fotovoltaicas - para um centro dedicado à divulgação e disseminação da ciência denominado Casa da Seda, que faz parte Centro Ciência Viva de Bragança. A solução é baseada numa microrrede ligada à rede elétrica, utilizando tecnologias inovadoras para produção, ar...
Design of a elf-sustainable system based on renewable energy sources for a smal...
Maidana, Wellington; Leite, Vicente; Ferreira, Ângela P.; Queijo, Luis; Batista, José; Bonaldo, Jakson; Gonçalves, EstefâniaThis paper presents the complete design of a selfsustainable system based on renewable energy sources - hydro and photovoltaic - for a small museum dedicated to the dissemination of science called House of Silk. The solution is based on a microgrid, connected to the main grid, using innovative technologies for energy production, storage and management. The microgrid is based on a cluster of three battery invert...