João Batista Dias

Simulation of Energy Production in Grid-Connected Photovoltaic Systems From Measured and Calculated Data From Clear-Sky Radiation Model

This paper presents a comparison of the energy production in grid-connected photovoltaic systems (GCPPS) from measured and calculated radiation data. The Linke turbidity (TL) factor for the region of Porto Alegre, Brazil, was extracted considering the data of direct solar radiation from the typical meteorological year (TMY). The average annual turbidity value obtained of 4.03 agrees with the wet climate of the region which presents only 17.26% of clear-sky days. There was a difference of 27.5% in the results of the produced energy, which drops to 6.5% when compared with only sunny days in the region, suggesting that the model in the current configuration for this type of estimate is barely adequate.

COMPLEMENTARY LEARNING METHODOLOGY OF PHOTOVOLTAIC SOLAR ENERGY BASED ON ENERGETIC ANALYSIS AN ISOLATED MICROGRID

The objective of this work was to create a virtual education environment as a complementary learning methodology of photovoltaic solar energy, called “platform for research and distance learning”. This methodology was developed by electrical and energy analysis of an isolated microgrid powered by a photovoltaic system operating in the Unisinos University. From the analysis, practical activities were developed and have been developed and applied to students of “Photovoltaics Solar Energy” class of the Energy Engineering Course. The microgrid supplies a load with programmable daily energy consumption profile developed to represent a standard residence community. The total installed PV power is 570 W peak, using two photovoltaic cell technologies (monocrystalline and multicrystalline), pure sine inverter, charge controller and battery bank. As a result, it was found that the microgrid is working adequately and through access to measurements, studies and analyzes can be performed, assisting in the understanding of the system. The methodology and the level of proposed tasks proved consistent, and acceptance by the students.