Assessment of the energy efficiency of a hybrid wind-photovoltaic system for Cascavel, PR

https://doi.org/10.1016/j.rser.2020.110013Get rights and content

Highlights

  • The Brazilian wind and photovoltaic potential can supply the energy demands of isolated communities.

  • Hybrid isolated systems can reduce the need for over-dimensioning the battery bank.

  • The Brazilian territory is privileged by intense solar potential in practically all regions.

  • Remote regions can minimize diesel consumption using a hybrid wind-photovoltaic system.

Abstract

The present work was developed at the Assis Gurgaz School of Engineering (FAG) and aimed to determine the efficiency of a wind-photovoltaic hybrid system for electricity generation. Three 140 W photovoltaic panels were installed to assess the generation of photovoltaic energy and the efficiency of its participation in the hybrid system. A small wind generator of 2000 W was used to evaluate the production of local wind energy, establishing the wind contribution in the hybrid system. Energy consumption was achieved with the installation of four 60 W incandescent lamps. The measurements of the meteorological quantities were obtained with the installation of a Micrometeorological station and the electrical data, with the use of a datalogger. Four batteries of 100 Ah each were installed to store the surplus electricity production and feed the installed load, when the system production was insufficient. A voltage divider, a rectifying bridge and an electronic device were installed to make it possible to record the quantities in the datalogger. The system showed efficiency of 12.5% for the generation of energy by the photovoltaic solar source, 18.7% for the wind generation and 11.9% for the entire hybrid system. The participation of the photovoltaic matrix contributed with 75.2% of all energy generated, while the wind matrix presented a contribution of 24.8%.

Section snippets

Overview

Far beyond offering dignity and important improvements in the quality of regional life, the supply of electricity to isolated communities also enables their socio-economic development, through the promotion of citizenship and social justice. However, factors such as lack of political interest, low demand, long distances, and technical constraints, place these communities on the margins of society, and they are not included in the electric power supply service.

In remote areas, where conventional

Electricity in Brazil

From an energetic point of view, Brazil is a privileged country because of its topography, hydrography, and tropical climate that allow the use of several renewable energy sources, such as water, biomass, wind, and solar [1].

The Brazilian Electric Power Matrix is highly dependent on the hydroelectric source, which is also subject to scarcity, despite being a renewable source. If that happened, it would compromise the country's energy supply [2]. It is one of the most renewable matrices on the

Material and Methods

The study was developed at the Assis Gurgacz School of Engineering (FAG) (Figure 1), located in the municipality of Cascavel, Paraná, with a geographical location defined by coordinates 24°57’ South (S) Latitude and 53°27’ West (W) Longitude and average altitude of 781 meters above sea level.

The Davis Instruments Micrometeorological station, composed of the Vantage PRO2 6162 Integrated Sensor Set (ISS) (Figure 2) was used to measure the meteorological and data acquisition variables of the

Results and Discussion

The mean daily wind speed (ms-1) values are represented in Figure 8. It can be observed that the highest daily average wind speed occurred on the 25th day, and the lowest average occurred on the 12th day. The period considered presented a large amplitude in the measures analyzed.

Figure 9 shows the values of the frequency of wind occurrence during the period observed. It is verified that the highest percentage of occurrence is about 4.0 m.s-1.

Figure 10 shows the available daily wind energy and

Conclusions

The conclusions presented in the evaluation of this experiment are conditioned to the execution of the experiment, being a reflection of the obtained results. The average wind velocity, wind energy available and wind energy produced by the wind turbine depended on the day and time of occurrence and for the period considered the average wind speed was 2.5 m.s-1.

The influence of the external temperature and atmospheric pressure, with averages of 290.3 K and 759.5 mmHg, respectively, were

Declaration of interests

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

☐The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:

CRediT authorship contribution statement

Gilson Debastiani: Conceptualization, Methodology, Formal analysis, Writing - review & editing, Supervision, Conceptualization, Methodology, Formal analysis, Writing - review & editing, Supervision, Methodology. Jeferson Manenti Acorci: Methodology, Methodology, Formal analysis, Writing - review & editing.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

The authors are grateful to the Post-Graduation Program of Energy Engineering in Agriculture (PPGEA), from the State University of Western Paraná (UNIOESTE).

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