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2 Transactions on Environment and Electrical Engineering

2 2017

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Simulation and analysis of an isolated full-bridge DC/DC boost converter operating with a modified perturb and observe maximum power point tracking algorithm

Matias C. A., Medeiros G. P., Moraes P. H. F., Fernandes B. de A., Alves A. J., Calixto W. P., Furriel G. P.

Transactions on Environment and Electrical Engineering

2017

Vol. 2, No. 2

45--50

The purpose of the present study is to simulate and analyze an isolated full-bridge DC/DC boost converter, for photovoltaic panels, running a modified perturb and observe maximum power point tracking method. The zero voltage switching technique was used in order to minimize the losses of the converter for a wide range of solar operation. The efficiency of the power transfer is higher than 90% for large solar operating points. The panel enhancement due to the maximum power point tracking algorithm is 5.06%.

Methodology for measurement the energy efficiency involving solar heating systems using stochastic modelling

Menita B. G., Medeiros G. P., Domingos J. L., Domingues E. G., Alves A. J., Faria A. F., Miguel M. L. S., Calixto W. P.

Transactions on Environment and Electrical Engineering

2017

Vol. 2, No. 1

42--51

The purpose of the present study is to evaluate gains through measurement and verification methodology adapted from the International Performance Measurement and Verification Protocol, from case studies involving Energy Efficiency Projects in the Goias State, Brazil. This paper also presents the stochastic modelling for the generation of future scenarios of electricity saving resulted by these Energy Efficiency Projects. The model is developed by using the Geometric Brownian Motion Stochastic Process with Mean Reversion associated with the Monte Carlo simulation technique. Results show that the electricity saved from the replacement of electric showers by solar water heating systems in homes of low-income families has great potential to bring financial benefits to such families, and that the reduction in peak demand obtained from this Energy Efficiency Action is advantageous to the Brazilian electrical system. Results contemplate also the future scenarios of electricity saving and a sensitivity analysis in order to verify how values of some parameters influence on the results, once there is no historical data available for obtaining these values.