以海上某5.5 MW水平轴风力机为例,基于数据采集与监控（SCADA）系统历史数据,结合时均化和瞬时高分辨率数据,分析弃风限电对单台风电机组功率和载荷及重要部件的影响。在此基础上,讨论限电会对机组重要结构部件产生的疲劳损伤,并给出防止或减少限电现象发生的建议。研究结果表明：限电降低了机组发电效率和转矩,增加了单位功率所承受的转矩,减缓了功率系数、转矩系数随风速增加而下降的趋势;限电增大了叶片的变桨角度,增加了变桨电机的温度和扭矩波动,大幅限功下叶片变桨角度近似于未限功时的3倍,温度较未限功时增加14%,扭矩波动度较未限功时增加30%以上。此外,限电间接降低了齿轮箱和发电机的温度。
Abstract
An offshore 5.5 MW horizontal axis wind turbine（HAWT） is taken as an example, the impact of wind abandonment and power limitation on the power and load of a single wind turbine is analyzed based on historical SCADA data, combined with time-averaged and instantaneous high-resolution data. On this basis, it is discussed that power limitation can produce fatigue damage to important structural components of the HAWT, and suggestions are made to prevent the occurrence of power limitation phenomenon. The results of the investigation show that power limitation reduces the wind turbine power generation efficiency and torque, and increases the torque applied unit power. It slows down the trend of decreasing power coefficient and torque coefficient with increasing wind speed. Power limiting increases the pitch angle of the blades and also increases the temperature and torque fluctuation of the pitch motor, the blade angle under large power limit is approximately 3 times of that without power limitation, with significant power limiting increasing the temperature by 14% compared to unlimiting power and increasing the torque fluctuation by more than 30%. In addition, power limiting indirectly reduces the temperature of the gearbox and generator.
关键词
风电机组 /
限电 /
载荷 /
温度 /
数据采集与监视控制系统
Key words
wind turbines /
power limitation /
load /
temperature /
SCADA
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基金
南方海洋科学与工程广东省实验室（湛江）科研项目（ZJW-2022-02）
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