Abstract
The use of wind energy has been growing worldwide continuously over the last years due to global efforts to combat climate change. The modern turbines are becoming ever more cost effective and are gaining features that aim to reduce further the impact on the environment, such as reducing noise or increasing the height. In this context, the current study investigates the persistence of wind in Fernando de Noronha archipelago, an important Brazilian ecological site, using hourly wind speed data at 100-m height. To this end, data from Era5 reanalysis were used, as they present high resolution and good performance in estimating meteorological data, and two well-known methods were applied to quantify wind persistence: duration curve and conditional probability. In addition, a novel method is proposed regarding persistence probability of periods of viable energy generation. The results obtained show that Fernando de Noronha archipelago presents rather high wind persistence on a monthly scale, with considerably long intervals of wind speed useful for wind power generation.
Highlights
The use of wind energy has been growing worldwide at an exponential rate over the last decades, primarily due to the lack of emission of greenhouse gases
We use statistical methods wind speed duration curve (WSDC) and conditional probability approach (CPA) (Koçak 2008), and we propose a novel approach, that we term “Persistence probability curve”, that yields the identical persistence threshold level as CPA, and offers an additional insight into the persistence properties of the wind speed series, at different scales
This study investigated the persistence of wind speed at a height of 100m for the Fernando de Noronha archipelago
Summary
The use of wind energy has been growing worldwide at an exponential rate over the last decades, primarily due to the lack of emission of greenhouse gases. Wind energy generation is viable in remote locations, and the cost of investing in wind turbines has decreased to the point of making this energy source competitive with other (often subsidized) sources. Novel models of wind turbines are being developed in order to obtain greater power, and at the same time further reduce the impact on the environment. In 2019 there were 60.4GW new wind energy installations, bringing the world production capacity to 651GW. Brazil was the fifth country that has invested the most in wind energy, adding 744.95MW in 2019 to its electric power grid to bring the installed capacity to 15.45GW, which represents 9.1% of the nation’s power matrix (Brazilian Wind Energy Association 2019)
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