Abstract
Wind energy development has been limited by concerns associated to the varying features in wind speed which tends to destabilize the power system. This study aims to clarify the variability of winds within a day in the Philippines, specifically the hourly changes of onshore horizontal winds at 100-m hub-heights. A whole one-year experiment using the Weather Research and Forecasting model shows that onshore wind speeds decrease during the transitional hours between land breeze and sea breeze. The decreases in wind speed are most significant over coastal regions with high sloping topography. The extreme decreases in wind speed during morning hours, due to the natural processes, are found to often occur at the same time as the extreme electricity undersupply caused by the morning increase in energy demand. This result warns that the power system stability in the Philippines may become more sensitive to the variability of wind as the share of wind energy generation increases in the future. The findings of this study can contribute to promote sustainability in the operation of existing wind-reliant power systems and planning of future wind energy developments.
Highlights
In the last decade, wind energy development has been seen to rise all over the world
Based on the analysis of Weather Research and Forecasting (WRF) experiments and power stability data, this study suggests the possibility that the timing of extreme decrease in wind speed coincides with the timing of extreme undersupply of electricity that is caused by anthropogenic effects
Due to looming threats due to climate change, wind energy, together with solar and other forms of renewable energy have grown in popularity as a source of energy to mitigate these threats
Summary
Wind energy development has been seen to rise all over the world With this rise, the reliability of electricity has been threatened in different countries that have a significant amounts of variable renewable energy (VRE) generation (e.g., wind and solar) in their power systems. Previous studies on renewable energy in the country [3,4] have been focused on quantifying wind energy potentials and somewhat creating a wind energy atlas. This lack of studies in this field is mostly because the amount of wind energy in the power system is not so significant
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