IEC的风机选型参数估算方法在中国的适用性研究

发布时间：2018-03-16 00:05

本文选题：WTGS选型参数　切入点：年一遇　出处：《气象》2016年12期 　论文类型：期刊论文

【摘要】：国际电工委员会编制的《风力发电机组设计要求》(IEC 61400-1)推荐了针对风电机组安全等级评估的极端风速和湍流强度特征值估算方法,因其简单便捷,在风电领域被广泛采用。利用全国风能资源专业观测网的193座测风塔观测数据,对IEC推荐的极端风速计算方法与我国规范推荐的基于极值I型概率分布方法进行比较,发现两种方法计算的193座塔70 m高度层50年一遇10 min平均最大风速,仅有7座测风塔较为一致,差异在±1%;IEC推荐方法的计算结果多数偏小,其中偏小10%以上的测风塔有121座,偏小30%以上的有44座测风塔,而偏大10%以上的只有9座测风塔;IEC方法计算的极值风速大幅度偏小的测风塔主要分布在台风影响的东南沿海地区,偏差较小的测风塔主要分布在西北和华北地形平缓区域,但同时偏大10%以上的测风塔也多分布在这一地区。以目前行业领域普遍采用的以15 m·s~(-1)风速的平均湍流强度作为风电机组选型指标,与严格按照规范,以15 m·s~(-1)风速段所有样本湍流强度的90%分位数处的值作为指标进行风电机组等级确定作对比,发现193座塔中有46座塔的选型是不安全的,甚至相差两个等级。
[Abstract]:IEC 61400-1, compiled by the International Electrotechnical Commission, recommended a method for estimating the eigenvalues of extreme wind speed and turbulence intensity for evaluating the safety grade of wind turbines, because of its simplicity and convenience. Wind power is widely used in the field of wind power. Based on the observation data of 193 wind towers in the national wind energy resource professional observation network, the calculation method of extreme wind speed recommended by IEC is compared with the probability distribution method based on extreme value I recommended by Chinese standard. It is found that the average maximum wind speed of 10 min is calculated by the two methods in the height layer of 70 m of 193 towers in 50 years, and only 7 wind towers are consistent. The difference is that most of the calculation results of the method recommended by 卤1IEC are small, among which there are 121 wind towers with a smaller height than 10%. There are 44 wind towers which are smaller than 30%, while only 9 wind towers above 10% are located in the southeast coastal area affected by typhoon. The wind towers with small deviations are mainly distributed in the flat terrain areas of the northwest and north China. At the same time, more than 10% wind towers are also distributed in this area. The average turbulence intensity of 15 m 路s-1) wind speed is widely used in the field of industry at present as the selection index of wind turbine units, and strictly in accordance with the specifications. Taking the value of 90 quartiles of turbulence intensity of all samples in the wind speed range of 15 m 路s ~ (-1) as the index to determine the grade of wind turbine, it is found that 46 of 193 towers are not safe, even two different grades.
【作者单位】：南京信息工程大学大气科学学院;中国气象局公共气象服务中心;
【基金】：科技部科技基础性工作专项项目(2013FY112400) 公益性行业(气象)科研专项(GYHY201306057) 江苏省普通高校研究生科研创新计划资助项目(KYLX_0825)共同资助
【分类号】：TM315

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