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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
K Sathish KUMAR,S NAVEEN
《能源前沿(英文)》 2014年 第8卷 第4期 页码 434-442 doi: 10.1007/s11708-014-0313-y
关键词: distribution system reconfiguration (DFR) power loss reduction catfish particle swarm optimization (catfish PSO) radial structure
Veera Venkata Satya Naryana MURTY, Ashwani KUMAR
《能源前沿(英文)》 2013年 第7卷 第2期 页码 197-213 doi: 10.1007/s11708-013-0249-7
关键词: load growth load models reactive power compensation radial distribution system power loss index (PLI) power loss sensitivity (PLS) index vector (IV)
Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI
《能源前沿(英文)》 2020年 第14卷 第4期 页码 867-881 doi: 10.1007/s11708-020-0707-y
关键词: concentrated solar power parabolic trough receiver heat loss solar energy annual performance
Constriction factor based particle swarm optimization for analyzing tuned reactive power dispatch
Syamasree BISWAS(RAHA), Kamal Krishna MANDAL, Niladri CHAKRABORTY
《能源前沿(英文)》 2013年 第7卷 第2期 页码 174-181 doi: 10.1007/s11708-013-0246-x
关键词: real power loss minimization voltage stability constriction factor particle swarm optimization (PSO)
Wenjie Sun, Jiale Mao, Shuang Wang, Lei Zhang, Yonghong Cheng
《化学科学与工程前沿(英文)》 2021年 第15卷 第1期 页码 18-34 doi: 10.1007/s11705-020-1939-4
关键词: dielectric capacitors polymer-based dielectrics energy density dielectric loss working temperature frequency response
《医学前沿(英文)》 doi: 10.1007/s11684-023-1006-x
关键词: neurodevelopmental disorder autosomal recessive intellectual disability consanguinity spastic paraplegia hearing loss TMEM141
Turnover and loss of nitrogenous compounds during composting of food wastes
YANG Yanmei, ZHANG Xiangfeng, YANG Zhifeng, XI Beidou, LIU Hongliang
《环境科学与工程前沿(英文)》 2008年 第2卷 第2期 页码 251-256 doi: 10.1007/s11783-008-0042-8
Winner determination problem with loss-averse buyers in reverse auctions
Xiaohu QIAN, Min HUANG, Yangyang YU, Xingwei WANG
《工程管理前沿(英文)》 2017年 第4卷 第2期 页码 212-220 doi: 10.15302/J-FEM-2017019
关键词: reverse auction loss aversion winner determination improved ant colony algorithm
A novel energy loss model and optimization design of the coin chute flection curve
Qinghua LIANG, Jinqiu MO, Weizhong GUO
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 38-46 doi: 10.1007/s11465-012-0311-x
In this paper, we propose a novel design model based on the energy loss of the coin (ELM model) to optimize the flection curve, which is widely used in coin operated machines. Two different kinds of energy loss models are analyzed according to dynamic characteristics of the coin falling movement. The flection curve is constructed based on cubic quasi-uniform B-spline with the data points and end points derivatives as inputs, and the curve model is governed and affected by energy loss equations, allowing to minimize the total energy loss before the coin arrives at the detecting position, thus to reduce the energy loss and collisions between the coin and the flection, thus to improve the testing accuracy. A case study with a typical Chinese currency coin shows the effectiveness of the model using GA optimization toolbox.
关键词: flection curve B-spline energy loss model (ELM model) optimization design
Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA
《农业科学与工程前沿(英文)》 2016年 第3卷 第2期 页码 161-170 doi: 10.15302/J-FASE-2016104
关键词: infiltration initial soil water content rainfall simulation soil loss straw mulching
Erhui GUO,Liding CHEN,Ranhao SUN,Zhaoming WANG
《环境科学与工程前沿(英文)》 2015年 第9卷 第2期 页码 279-287 doi: 10.1007/s11783-014-0667-8
关键词: riparian vegetation patterns soil nutrient distribution nutrient loss management
Performance enhancement of partially shaded solar PV array using novel shade dispersion technique
Namani RAKESH,T. Venkata MADHAVARAM
《能源前沿(英文)》 2016年 第10卷 第2期 页码 227-239 doi: 10.1007/s11708-016-0405-y
关键词: photovoltaic cells mismatch loss shading patterns partial shading magic square power enhancement global peaks and total cross tied (TCT)
《医学前沿(英文)》 2021年 第15卷 第3期 页码 460-471 doi: 10.1007/s11684-021-0861-6
关键词: low-carbohydrate diet obesity nonalcoholic fatty liver disease continuous glucose monitoring mean sensor glucose
A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0757-z
关键词: flank-regrinding worn end mill wheel position and orientation material loss over-cut
标题 作者 时间 类型 操作
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
Power system reconfiguration and loss minimization for a distribution systems using “Catfish PSO” algorithm
K Sathish KUMAR,S NAVEEN
期刊论文
Comparison of optimal capacitor placement methods in radial distribution system with load growth and ZIP load model
Veera Venkata Satya Naryana MURTY, Ashwani KUMAR
期刊论文
Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough
Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI
期刊论文
Constriction factor based particle swarm optimization for analyzing tuned reactive power dispatch
Syamasree BISWAS(RAHA), Kamal Krishna MANDAL, Niladri CHAKRABORTY
期刊论文
Review of recent advances of polymer based dielectrics for high-energy storage in electronic power devices
Wenjie Sun, Jiale Mao, Shuang Wang, Lei Zhang, Yonghong Cheng
期刊论文
Panoramic variation analysis of a family with neurodevelopmental disorders caused by biallelic loss-of-function
期刊论文
Turnover and loss of nitrogenous compounds during composting of food wastes
YANG Yanmei, ZHANG Xiangfeng, YANG Zhifeng, XI Beidou, LIU Hongliang
期刊论文
Winner determination problem with loss-averse buyers in reverse auctions
Xiaohu QIAN, Min HUANG, Yangyang YU, Xingwei WANG
期刊论文
A novel energy loss model and optimization design of the coin chute flection curve
Qinghua LIANG, Jinqiu MO, Weizhong GUO
期刊论文
Effect of mulching with maize straw on water infiltration and soil loss at different initial soil moistures
Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA
期刊论文
Effects of riparian vegetation patterns on the distribution and potential loss of soil nutrients: a case
Erhui GUO,Liding CHEN,Ranhao SUN,Zhaoming WANG
期刊论文
Performance enhancement of partially shaded solar PV array using novel shade dispersion technique
Namani RAKESH,T. Venkata MADHAVARAM
期刊论文
Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized
期刊论文