摘要
风能资源评估是风电场开发的基础工作,直接关系着微观选址的准确性,影响风电场经济效益。目前常用的风资源评估方法主要是基于数值模拟的评估方法,把测风塔固定高度处风资源数据、地形图及其他资料数据导入软件进行计算,从而推算风机轮毂高度处风资源分布情况。该方法由于在前期数据的处理中存在误差,因此风资源分布计算也存在一定误差。提出了多测风塔综合地貌及风切变拟合修正的风资源评估方法,首先运用测风塔固定高度处测风数据对区域内各个风机点位测风塔高度处风资源进行计算,再运用已知的多个测风塔地形地貌数据及风切变数据对拟建风机点风切变进行模拟计算,通过风速随风切变变化规律计算风机轮毂高度处风资源分布。最后以实例验证了该模型的准确性。
The wind resource evaluation is the foundation work for wind farm development,which is directly related to the accuracy of the microscopic site selection and influences on the economic benefit of the wind farm.The current wind resource evaluation method is mainly based on the numeric simulation.The wind resource data obtained by wind tower in fixed altitude,the topographic map and other materials were imported into the certain software to calculate the wind resource distribution in the altitude of the wheel hub of the wind turbine.In this method,due to that there is error in the previous data processing,certain error exists in the calculation result of the wind resource distribution.The wind resource evaluation method for complex terrain by multiple wind towers with comprehensive landform and wind shear data fitting and correction was proposed.Firstly,the wind data in fixed altitude measured by the wind towers was used to calculate the wind resource of each wind turbine site in selected area at the fixed altitude of wind tower,the known topography data of the wind tower positions and the wind shear data were used to simulate the wind shear of the planned wind turbine positions,the wind resource in altitude of wind turbine wheel hub was calculated by the law of the wind speed variation along with the wind shear.At last,the accuracy of the model was proved by practical example.
出处
《华电技术》
CAS
2012年第11期75-77,81,共3页
HUADIAN TECHNOLOGY
基金
浙江省重大科技项目(2009C11022)
关键词
风资源评估
风资源分布
复杂地形
修正方法
wind resource evaluation
wind resource distribution
complex terrain
correction method
