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Optimal placement of wind turbines within a wind farm considering multi-directional wind speed using
A.S.O. OGUNJUYIGBE, T.R. AYODELE, O.D. BAMGBOJE
《能源前沿(英文)》 2021年 第15卷 第1期 页码 240-255 doi: 10.1007/s11708-018-0514-x
关键词: optimal placement wind turbines wind direction genetic algorithm wake effect
Belkacem MAHDAD, K. SRAIRI
《能源前沿(英文)》 2013年 第7卷 第1期 页码 75-89 doi: 10.1007/s11708-012-0222-x
关键词: differential evolution multi-objective function optimal power flow economic dispatch valve point effect environment wind source STATCOM
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 397-405 doi: 10.1007/s11465-017-0415-4
The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.
关键词: dynamic response friction coefficient wind loads wind turbine gearbox
郑晅,郭佳奇
《中国工程科学》 2010年 第12卷 第3期 页码 39-44
秦岭终南山特长公路隧道规模庞大,通风系统复杂,为了合理确定通风配置,节约通风费用,评估自然风和交通活塞风等非机械式通风方式的通风效果就显得非常重要。课题组现场监测了终南山特长公路隧道内的自然风速、交通量及自然风压和交通风压共同作用下的风速,收集了大量数据。通过对监测数据的处理、分析得出,较大自然风速出现在10∶00—14∶00这个时间段,最大自然风速达到2.576 m/s;隧道东、西线交通量出现高峰期的时间段基本恒定;隧道东线内自然风压和交通风压共同作用下的风速较大的时间段基本上与交通量高峰期时间段相吻合,而西线这两个时间段吻合性较差,洞内风速变化相对平缓。考虑洞口外风向频率、风向、洞口实测温度等参数的自然风速计算方法计算值与实测自然风速较接近。隧道内自然风压和交通风压联合作用下的风速计算值虽小于现场实测值,但较接近实测值。
Youliang DING, Aiqun LI
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 374-380 doi: 10.1007/s11709-011-0122-x
关键词: structural health monitoring displacement expansion joint temperature effect wind effect traffic loading statistical process control suspension bridge
Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 241-248 doi: 10.1007/s11709-009-0036-z
关键词: high-rise buildings along-wind cross-wind background equivalent static wind load close formulae
Review of aeroelasticity for wind turbine: Current status, research focus and future perspectives
Pinting ZHANG, Shuhong HUANG
《能源前沿(英文)》 2011年 第5卷 第4期 页码 419-434 doi: 10.1007/s11708-011-0166-6
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 321-332 doi: 10.1007/s11465-017-0434-1
The magnitude and stability of power output are two key indices of wind turbines. This study investigates the effects of wind shear and tower shadow on power output in terms of power fluctuation and power loss to estimate the capacity and quality of the power generated by a wind turbine. First, wind speed models, particularly the wind shear model and the tower shadow model, are described in detail. The widely accepted tower shadow model is modified in view of the cone-shaped towers of modern large-scale wind turbines. Power fluctuation and power loss due to wind shear and tower shadow are analyzed by performing theoretical calculations and case analysis within the framework of a modified version of blade element momentum theory. Results indicate that power fluctuation is mainly caused by tower shadow, whereas power loss is primarily induced by wind shear. Under steady wind conditions, power loss can be divided into wind farm loss and rotor loss. Wind farm loss is constant at 3α(3α−1)R2/(8H2). By contrast, rotor loss is strongly influenced by the wind turbine control strategies and wind speed. That is, when the wind speed is measured in a region where a variable-speed controller works, the rotor loss stabilizes around zero, but when the wind speed is measured in a region where the blade pitch controller works, the rotor loss increases as the wind speed intensifies. The results of this study can serve as a reference for accurate power estimation and strategy development to mitigate the fluctuations in aerodynamic loads and power output due to wind shear and tower shadow.
关键词: wind turbine wind shear tower shadow power fluctuation power loss
Assessment of wind energy potential in Gaza Strip
Juma Yousuf ALAYDI
《能源前沿(英文)》 2011年 第5卷 第3期 页码 297-304 doi: 10.1007/s11708-010-0134-6
关键词: wind data wind resource assessment wind power density wind energy the Weibull distribution and Weibull parameters
Huali HAN
《工程管理前沿(英文)》 2020年 第7卷 第4期 页码 618-621 doi: 10.1007/s42524-020-0142-0
关键词: renewable energy megawatt offshore wind turbine technology-driven quality improvement
Simulation of steel beam under ceiling jet based on a wind–fire–structure coupling model
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 78-98 doi: 10.1007/s11709-022-0936-8
关键词: CFD–FEM coupling steel beam wind ceiling jet numerical heat transfer
Evaluation of the wind energy potential of two south west sites in Nigeria
Olaleye M. AMOO
《能源前沿(英文)》 2012年 第6卷 第3期 页码 237-246 doi: 10.1007/s11708-012-0201-2
关键词: wind potential wind speed wind power density wind gust turbulence intensity Nigeria
Condition monitoring of a wind turbine generator using a standalone wind turbine emulator
Himani,Ratna DAHIYA
《能源前沿(英文)》 2016年 第10卷 第3期 页码 286-297 doi: 10.1007/s11708-016-0419-5
关键词: condition monitoring (CM) wind turbine emulator (WTE) wind turbine generator (WTG) maximum power point tracking (MPPT) tip speed ratio (TSR) rotor faults stator faults
Optimization design of spar cap layup for wind turbine blade
Jie ZHU, Xin CAI, Pan PAN, Rongrong GU
《结构与土木工程前沿(英文)》 2012年 第6卷 第1期 页码 53-56 doi: 10.1007/s11709-012-0147-9
关键词: wind turbine blade spar cap layup optimization design blade mass
Investigation on available wind energy at Tungku beach
M. G. YAZDANI, M. A. SALAM
《能源前沿(英文)》 2012年 第6卷 第3期 页码 275-279 doi: 10.1007/s11708-012-0194-x
关键词: wind velocity temperature tower height power density Raleigh distribution electrical power
标题 作者 时间 类型 操作
Optimal placement of wind turbines within a wind farm considering multi-directional wind speed using
A.S.O. OGUNJUYIGBE, T.R. AYODELE, O.D. BAMGBOJE
期刊论文
Solving multi-objective optimal power flow problem considering wind-STATCOM using differential evolution
Belkacem MAHDAD, K. SRAIRI
期刊论文
Effect of friction coefficients on the dynamic response of gear systems
Lingli JIANG, Zhenyong DENG, Fengshou GU, Andrew D. BALL, Xuejun LI
期刊论文
Assessment of bridge expansion joints using long-term displacement measurement under changing environmental conditions
Youliang DING, Aiqun LI
期刊论文
Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
期刊论文
Review of aeroelasticity for wind turbine: Current status, research focus and future perspectives
Pinting ZHANG, Shuhong HUANG
期刊论文
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
期刊论文
Quality and efficiency improvement technology for five megawatt offshore wind turbines and its application
Huali HAN
期刊论文
Condition monitoring of a wind turbine generator using a standalone wind turbine emulator
Himani,Ratna DAHIYA
期刊论文
Optimization design of spar cap layup for wind turbine blade
Jie ZHU, Xin CAI, Pan PAN, Rongrong GU
期刊论文