Introduction The paper aims to investigate the conversion relationships of different time interval averaged wind speeds in tropical cyclone and evaluate extreme wind speed of electric projects.
Method Wind speed records from an island meteorological station in Pearl River Delta during 14 samples from 1991 to 2009 were employed to calculate gust factor between 3 s, 10 min, 1 h wind speed and effects of wind speed, terrain roughness, and typhoon track were analyzed.
Result Results show that gust factor gradually decreases and approaches to a certain range when corresponding mean wind speed increasing while statistical distribution of gust factor is relatively insensitive to typhoon track. Offshore wind appears higher gust factor than onshore wind with different roughness.
Conclusion This work supports the availability of recommended values from World Meteorological Organization in Pearl River Delta coastal area.
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