Statistical Analysis of Wind Power Density Based on the Weibull and Rayleigh Models of Selected Site in Malaysia

Aliashim Albani,Mohd Zamri Ibrahim

doi:10.18187/pjsor.v9i4.580

Aliashim Albani, Mohd Zamri Ibrahim

Open Access

https://doi.org/10.18187/pjsor.v9i4.580

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Abstract

The demand for electricity in Malaysia is growing in tandem with its Gross Domestic Product (GDP) growth. Malaysia is going to need even more energy as it strives to grow towards a high-income economy. Malaysia has taken steps to exploring the renewable energy (RE) including wind energy as an alternative source for generating electricity. In the present study, the wind energy potential of the site is statistically analyzed based on 1-year measured hourly time-series wind speed data. Wind data were obtained from the Malaysian Meteorological Department (MMD) weather stations at nine selected sites in Malaysia. The data were calculated by using the MATLAB programming to determine and generate the Weibull and Rayleigh distribution functions. Both Weibull and Rayleigh models are fitted and compared to the Field data probability distributions of year 2011. From the analysis, it was shown that the Weibull distribution is fitting the Field data better than the Rayleigh distribution for the whole year 2011. The wind power density of every site has been studied based on the Weibull and Rayleigh functions. The Weibull distribution shows a good approximation for estimation of wind power density in Malaysia.

Highlights

Malaysia comprises Peninsular Malaysia, Sabah and Sarawak which are the part of Borneo Island
The wind speed data in time series format are usually arranged in the frequency distribution format since it is more convenient for statistical analysis, the available time-series data were translated into a frequency distribution format as mentioned by Muzathik et al (2009)
The study was presented nine stations which have a variation of wind speed data

Summary

Introduction

Malaysia comprises Peninsular Malaysia, Sabah and Sarawak which are the part of Borneo Island. Malaysia lies in the equatorial zone and the climate is governed by the regime of the northeast and southwest monsoons which blow alternately during the course of the year as mentioned by Sopian et al (1994). Malaysian Meteorological Department (MMD) in 2011 has highlighted, though the wind over the country is generally light and variable, there are, some uniform periodic changes in the wind flow patterns. Based on these changes, four seasons can be distinguished, namely, the southwest monsoon, northeast monsoon and two shorter periods of inter-monsoon seasons.

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