Analysis of Differences in Wind Energy Parameters Between Mountainous, Hilly, Plain and Lake Areas Based on Mast Data

Abstract

[Introduction] In order to promote the sustainable and healthy development of wind energy resources and provide a scientific basis for the rational development and use of wind energy resources in the inland areas, the paper analyzes the characteristics of the main wind energy parameters and their differences between the mountainous, hilly, plain and lake areas. [Method] We used the observation data of 11 wind masts with heights of 90~150 m distributed in five different terrains of mountainous, hilly, plain and lake areas in Hubei Province for a whole year, analyzed the characteristics of the main wind energy parameters and their differences between the mountainous, hilly, plain and lake areas. [Result] The analysis results show that: (1) the daily variation of wind speed at the upper level of each mast is in the range of 1.0~2.3 m/s and is significantly larger in the mountainous and hilly terrain than in the plain and lake areas, and the variation tends to be consistent at various levels in that it is small during the day and large at night, while in the plain and lake areas, the daily variation at the lower level has opposite characteristics to the upper level and is large during the day and small at night; (2) the composite wind shear index of each mast ranges from 0.055~0.328, which is greater in the mountainous and hilly terrain than in the plain and lake areas, the daily variation of wind shear index is from 0.063~0.378, which is small during the day and large at night and significantly larger in the plain and lake areas than in the mountainous and hilly areas, and wind shear under high wind conditions is more discrete in the mountainous and hilly terrain and more concentrated in the plain and lake terrain, basically stable between 0.1~0.2; (3) the annual mean turbulence intensity in the effective wind speed section at the upper level of each mast is 0.13~0.18, which is greater in the mountainous terrain than in the plain and lake areas, and the daily variation of turbulence intensity in each mast is from 0.07~0.15, characterized in that the turbulence intensity is large during the day and small at night and the daily variation is significantly larger in the mountainous and hilly terrain than in the plain and lake areas. [Conclusion] It can be seen that the characteristics of wind energy resources under different terrains show obvious spatial and temporal variations under the action of power and heat, the results of the analyses can provide guidance for the development and utilization of wind energy resources.

Keywords

• wind energy resources
• wind masts
• characterization
• mountainous and hilly areas
• plain and lake areas
• parameter differences