一种基于风况预测的优化偏航策略  

An Optimized Yaw Strategy Based on Wind Speed and Direction Prediction

作　　者：魏德 杨志凌[2] 张劲草 王奕洲 De Wei;Zhi-ling Yang;Jing-cao Zhang;Yi-zhou Wang(GD Power Datong Hudong Generation Co.,Ltd.;North China Electric Power University;Beijing Municipal Lighting Management Center)

机构地区：[1]国电电力大同湖东发电有限公司 [2]华北电力大学 [3]北京市城市照明管理中心

出　　处：《风机技术》2023年第2期85-91,共7页Chinese Journal of Turbomachinery

摘　　要：不同地理位置上风电场的风速和风向变化不同。多数风电机组依照统一的参数执行同一偏航策略,经常出现对风不准问题,导致“欠偏航”和“过偏航”,既加剧了偏航磨损,又增加了偏航成本,还降低了风能利用率。以风电场所处地理位置的气候、地形、地貌等条件不变,风况具有一定的周期性内在变化规律为前提,通过统计风电场历史风速与风向的变化关系,获得风向变化规律特性,从中得到最大概率风向变化角度,将其作为启动偏航的动态偏航误差角度,并综合考虑机械磨损和用电消耗等指标确定偏航时延。利用C-L模型预测未来某时刻风速,预算偏航参数值,制定出主动响应、精准匹配风向的适时偏航策略。应用本文提出的偏航策略,每台机组均获得了不低于1%的增发电量效果。Wind speed and direction is different in wind farms with different geographical locations.However,most of the wind turbines implement the same yaw strategy according to uniform parameters,which often leads to inaccurate wind alignment,resulting in"under yaw"and"over yaw",which not only aggravates the yaw wear and tear,but also increases the yaw cost and reduces the wind energy utilization rate.Assume that the geographic location condition of the climate,topography,geomorphology in wind farm remain unchanged,the wind conditions have a certain internal periodical change law.In this paper,the relationship between wind speed and direction changes in the history of wind farms is counted to obtain the wind direction change law.The maximum probability wind direction change angle is obtained,which is used as the dynamic yaw error angle for starting yaw,and the yaw time delay is determined by considering mechanical wear and tear,electricity consumption and other indicators.The C-L model is used to predict the wind speed at a certain moment in the future,predict the yaw parameter values and develop a timely yaw strategy that actively responds and accurately matches the wind direction.By applying the yaw strategy proposed in this paper,each wind turbine unit has obtained at least 1%increase power generation.

关 键 词：风电机组 偏航策略 偏航误差角 风向预测 风速预测 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]