30 documents found, page 1 of 3
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...
Wind turbine emulation using an inverter-controlled induction motor
Simões, Ananda Thomaz; Ferreira, Ângela P.; Leite, V.; Voltolini, HélioThe focus of this work is on the wind turbine emulation, using an induction motor (IM) driven by a variable speed drive and real time control software, to supply a mechanical power to the generator’ shaft. From a given wind profile, using the turbine characteristics and the rotational speed of the generator, the theoretical mechanical power is calculated and regulated at the output of the induction motor. The d...
Pico-hydro systems: microgrid-connection approaches
Leite, V.; Ferreira, Ângela P.; Couto, José; Batista, JoséSmall hydropower systems are considered an environmentally friendly energy option. They have a huge untapped potential which allows them to make a more significant contribution to future energy demand with many advantages. The integration of pico-hydro systems into microgrids is an emerging solution for the electrification of remote areas and for self-sustainable power systems. This paper presents and discusses...
Grid-connection approaches for pico-hydro systems
Leite, V.; Ferreira, Ângela P.; Couto, José; Batista, JoséSmall hydropower systems are considered an environmentally friendly energy option. They have a huge untapped potential which allow it to make a more significant contribution to future energy demand with many advantages. Grid-connected pico-hydro systems are an emerging solution for application in a huge number of applications such as in household water supply, wastewater treatment facilities and to improve cont...
A practical approach for grid-connected pico-hydro systems using conventional p...
Leite, V.; Couto, José; Ferreira, Ângela P.; Batista, JoséPico-hydro power generation has a considerable untapped potential, able to contribute to the increased energy demand whilst ensuring a low environmental impact. The integration of these systems into microgrids is an emerging solution for the electrification of remote regions and also for selfsustainable power systems. The integration of cheap and wide spread technologies to interface small capacity hydro power ...
Low-cost I-V tracer for photovoltaic modules and strings
Leite, V.; Batista, José; Chenlo, Faustino; Afonso, João L.This paper presents new developments of a robust and low-cost instrument - less than 600 € - for monitoring and processing I-V and P-V characteristics of photovoltaic (PV) modules and high voltage strings. The characteristics can be traced on an oscilloscope or using a developed a LabVIEW application. It is a simple instrument because only fundamental electronic circuits are used. The equipment consists of a fl...
Improving the storage capability of a microgrid with a vehicle-to-grid interface
Leite, V.; Ferreira, Ângela P.; Batista, JoséIn the emergent deployment of microgrids, storage systems play an important role providing ancillary services, such as backup power and reactive power support. This concept becomes crucial in the context of microgrids with a high penetration of renewable energy resources, where storage systems may be used to smooth the intermittency and variability of most of them. Plug-in electric vehicles provide an enormous ...