摘要
该文提出耦合无规则、多自由度旋转运动的风力机试验方案,通过物理模型试验,研究风电场阵列布置、不同风力机轴向间距工况下,各排风力机来流速度、功率及其波动特性。结合功率时间尺度积分的概念,探究其与风力机平均输出功率的关系,并建立预测功率波动特征的数学模型。研究结果表明:风力机的来流速度有大尺度、低频率和小尺度、高频率的信号特征,从功率时间尺度积分的趋势可看出,处于下游的风力机,功率波动逐渐增加。由功率能谱特性曲线可知功率波动的能量随着频率的增大而衰减,在低频率段衰减曲线近似f-2的变化规律;在高频率段,能谱特性曲线近似f-5/3-2的变化规律。
A project of model wind turbine with irregular and multi-degree of freedom motions was designed in this paper.Laboratory experiments were carried out to quantify incoming flow and power fluctuation characteristics of model wind turbines under different axial spacing conditions in wind farm within uniform arrays.The characteristics of the mean output power with the power integral time scale were studied.Then a math model for predicting the characteristics of the power fluctuation characteristics was deduced.Results suggested that the characteristics of incoming flow are large scales in the low frequency domains and small scales in the high frequency domains.We found some points from the evolution of power integral length scale that the power fluctuation characteristics of the model turbines increase in the streamwise.The energy of power fluctuations decreases as the frequency increases,but the slope of the energy curve is similar to f-2in the low frequency domains,and is similar to f-5/3-2 in the high frequency domains.
作者
张步恩
余烈
杨磊
赵振宙
刘惠文
郑源
Zhang Buen;Yu Lie;Yang Lei;Zhao Zhenzhou;Liu Huiwen;Zheng Yuan(China Renewable Energy Engineering Institute,Beijing 100120,China;Renewable Energy Power Generation Project Quality Supervision Center,Beijing 100120,China;Power China Zhongnan Engineering Corporation Limited,Changsha 410014,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 210024,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2023年第7期303-310,共8页
Acta Energiae Solaris Sinica
基金
国家重点研发计划政府间国际科技创新合作项目(2019YFE0105200)
国家自然科学基金项目(52271275)
江苏省自然科学基金青年项目(BK20210370)
国家自然科学基金青年项目(52106239)。
关键词
风力机
风电场
动力学特性
模型
平均输出功率
功率波动
wind turbines
wind farm
dynamics characteristics
models
mean output power
power fluctuations
