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A non-intrusive reduced-order model for wind farm wake analysis based on SPOD-DNN 基于SPOD-DNN的风电场尾流分析非侵入式降阶模型
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-04-10 DOI: 10.1177/0309524X231162638
Zhaoliang Guo, Li Xu, Guanhao Zhou, Kaijun Zhang
Wind farm wake modeling is of great significance for wind turbine layout optimization design and yaw control strategy. In this work, we combine deep neural network (DNN) with spectral proper orthogonal decomposition (SPOD) to discover dynamic characteristics of wake under different inflow conditions. Then an assessment of the proposed SPOD-DNN surrogate modeling method of parameterized fluid is performed by comparing the predicted results. Meanwhile, we demonstrate the robustness of the SPOD-DNN through a comparison with POD-DNN, where SPOD produces fewer modes than POD but can achieve the same cumulative contribution rate and wake prediction accuracy. In the end, the method is developed to predict the wake of single wind turbine in untrained inflow condition and Wake of six wind turbines with different yaw angles. The results reveals that the model has good generalization performance and can robustly reconstruct the wake of multiple wind turbines in different directions.
风电场尾流建模对风力机布局优化设计和偏航控制策略具有重要意义。本文将深度神经网络(DNN)与谱固有正交分解(SPOD)相结合,研究不同入流条件下尾流的动态特性。通过对比预测结果,对所提出的参数化流体SPOD-DNN代理建模方法进行了评价。同时,我们通过与POD- dnn的比较证明了SPOD- dnn的鲁棒性,其中SPOD比POD产生更少的模式,但可以达到相同的累积贡献率和尾迹预测精度。最后,将该方法应用于非训练入流条件下单台风力机的尾迹预测和不同偏航角下6台风力机的尾迹预测。结果表明,该模型具有良好的泛化性能,能够鲁棒地重建多台风力机不同方向的尾迹。
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引用次数: 0
Average model of wind energy system dedicated to optimal design of the global system 风能系统的平均模型,用于全局系统的优化设计
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-04-01 DOI: 10.1177/0309524X231165480
S. Tounsi
This paper presents an average model based on justified simplifications dedicated to the design and optimization of wind energy systems. Indeed, the classic models of wind energy systems are complex and their use is not efficient for the optimal design of the components of the power chain given the complexity, the significant time of resolution and the strong correlation of the physical parameters of these models. For these reasons, a model based on the theory of average values with reduced simulation time of a wind turbine structure is developed. This model is validated against the classic model of the wind chain using the SimPowerSystem library of power component models integrated under the Matlab-Simulink simulation environment.
本文提出了一个基于合理简化的平均模型,专门用于风能系统的设计和优化。事实上,风能系统的经典模型是复杂的,考虑到这些模型的复杂性、分辨率的显著时间和物理参数的强相关性,它们的使用对于电力链组件的优化设计是无效的。基于此,提出了一种基于均值理论和缩短仿真时间的风力机结构模型。利用Matlab-Simulink仿真环境下集成的SimPowerSystem功率元件模型库,与经典风链模型进行了对比验证。
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引用次数: 0
Location and turbine parameter selection for offshore wind power maximization 海上风电功率最大化选址及风机参数选择
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-04-01 DOI: 10.1177/0309524X231165484
Md Imran Hasan Tusar, B. Sarker
Offshore wind turbines can capture more wind than onshore because of their larger structure and location. This higher yield even fails to reduce the high installation and maintenance cost of an offshore wind farm (OWF). Appropriate turbine parameters and installation site selection may maximize the power generation which is a way to trade off these costs. Knowing the wind thrust force, air density, and power coefficient beforehand can help select an appropriate site for turbine location. Once the site is selected, the optimal value of turbine variables such as height and radius can contribute to higher power yield. In this paper, a MINLP (Mixed Integer Non-Linear Programing) model is formulated with these important variables and the optimal values of these variables are determined to maximize the annual power production ( E prod ) from offshore wind farm. The estimated power production, E prod , is calculated using two methods, mathematical programing method and simulation method. Computational result indicates that mathematical programing method is time consuming but more accurate whereas the accuracy of simulation method is proportional to the number of iterations. Although the result of a simulation can be improved to some extent, it cannot be as accurate as mathematical modeling for this study. These study results have great impact on the managerial decision and long range strategic and technical planning for maximizing power generation from an offshore wind farm.
由于海上风力涡轮机的结构和位置更大,因此可以捕获比陆上更多的风。更高的产量甚至无法降低海上风电场(OWF)高昂的安装和维护成本。适当的涡轮机参数和安装地点选择可以最大限度地提高发电量,这是一种权衡这些成本的方法。事先了解风力推力、空气密度和功率系数可以帮助选择合适的位置安装涡轮机。一旦选定位置,涡轮机的高度和半径等变量的最优值可以有助于提高发电量。本文利用这些重要变量建立了一个MINLP(混合整数非线性规划)模型,并确定了这些变量的最优值,以使海上风电场的年发电量(E prod)最大化。采用数学规划法和仿真法两种方法计算估计发电量E prod。计算结果表明,数学规划法耗时长,但精度较高,而仿真法的精度与迭代次数成正比。虽然模拟的结果可以在一定程度上得到改善,但对于本研究来说,它不能像数学建模那样精确。这些研究结果对海上风电场发电最大化的管理决策和长期战略技术规划具有重要影响。
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引用次数: 0
A unified optimization control of wind farms considering wake effect for grid frequency support 考虑尾流效应的风电场电网频率支持统一优化控制
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-03-29 DOI: 10.1177/0309524X231163823
Cheng Zhong, Husai Wang, Zhifu Jiang, Dechi Tian
This paper proposed a unified active power optimization control of wind farms under wake effect. It takes the sum of the kinetic energy variation and pitch angle variation as the optimization objective and used the particle swarm algorithm to achieve the optimization results. The main feature of the proposed method is that it unifies the kinetic energy optimization under a low wind speed area, the pitch angle and kinetic energy trade-off optimization under a medium wind speed area, and the pitch angle optimization under a high wind speed area. Combined with the de-loaded power constraint, it can flexibly reach various optimal operating states of the wind farm. The simulation results show that the proposed method optimizes the rotor speed and pitch angle in different wind speed areas, and releases kinetic energy and/or increases the output power of the wind farm to provide frequency support by switching the operating states.
提出了一种考虑尾流效应的风电场统一有功优化控制方法。以动能变化量和俯仰角变化量之和为优化目标,利用粒子群算法实现优化结果。该方法的主要特点是将低风速区域下的动能优化、中风速区域下的俯仰角与动能权衡优化和高风速区域下的俯仰角优化统一起来。结合卸载功率约束,可灵活达到风电场的各种最佳运行状态。仿真结果表明,该方法在不同风速区域优化了转子转速和俯仰角,并通过切换运行状态释放动能和/或增加风电场输出功率提供频率支持。
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引用次数: 1
Effects of finite sampling on fatigue damage estimation of wind turbine components: A statistical study 有限采样对风力机部件疲劳损伤估计的影响:一种统计研究
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-03-29 DOI: 10.1177/0309524X231163825
S. Mozafari, K. Dykes, J. Rinker, P. Veers
The variability of the wind turbine loads complicates fatigue assessment in the design phase, as performing simulations covering the entire lifetime is computationally expensive. The current work provides important information for assessing the uncertainty in fatigue damage estimation due to finite data. We study the sample size effect on mean, variance, and skewness of damage in each wind bin, identify the important wind bins, and study the uncertainty propagation from each wind bin to the lifetime damage using 3600 aeroelastic simulations and bootstrapping. To achieve less than 1% error in the damage estimation across all load channels in the current case study, at least 100 turbulence seeds are needed. Damage in different wind bins follows a lognormal distribution when using the conventional approach of six seeds. The provided insights and information allow the designer to achieve a specific level of accuracy for a given computational cost using strategic bin sampling.
风力涡轮机负载的可变性使设计阶段的疲劳评估复杂化,因为进行覆盖整个生命周期的模拟计算成本很高。本文的工作为评估有限数据下疲劳损伤估计的不确定性提供了重要的信息。我们研究了样本大小对每个风仓损伤的均值、方差和偏度的影响,确定了重要的风仓,并使用3600气动弹性模拟和自启动研究了每个风仓到寿命损伤的不确定性传播。在当前的案例研究中,为了在所有载荷通道中实现小于1%的损伤估计误差,至少需要100个湍流种子。当使用六种种子的常规方法时,不同风箱的损害遵循对数正态分布。所提供的见解和信息,使设计师能够实现特定水平的准确性,为一个给定的计算成本使用战略箱抽样。
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引用次数: 2
Robust sensor-less sliding mode of second-order control of doubly fed induction generators in variable speed wind turbine systems based on a novel MRAS-ANFIS observer 基于新型MRAS-ANFIS观测器的变速风力发电系统双馈发电机二阶鲁棒无传感器滑模控制
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-03-25 DOI: 10.1177/0309524X231158707
L. Saihi, B. Berbaoui, F. Ferroudji, Y. Bakou, Elhassen Benfriha
The current study proposed a robust sensor-less sliding mode second-order based on a super twisting algorithm (STA-SMSO) approach using a new observer Model Reference Adaptive System-Adaptative Neuro-Fuzzy Inference System (MRAS-ANFIS). This model was applied to a doubly fed induction generator (DFIG) wind turbine running under variable wind speed and DFIG fed with a power voltage source without a speed sensor, while the control objective was used to regulate independently, the active and reactive power DFIG stator were decoupled by using the field-oriented control technique. Additionally, this process reduced the cost of the control scheme and the size of DFIG by eliminating the speed sensor (encoder). In order to improve the traditional MRAS, the MRAS-ANFIS observer was proposed to replace the usual PI controller in the adaptation mechanism of MRAS with an Adaptative Neuro-Fuzzy Inference System (ANFIS) controller. The estimation of rotor position was tested and discussed under varying load conditions in low, zero, and high-speed region. The results mentioned that the proposed observer (MRAS-ANFIS) presented an attractive feature, such as guarantees finite time convergence, good response on speed wind variations, high robustness against machine parameter variations, and load variations compared to the conventional MRAS observer and MRAS-Fuzzy. Hence, the estimated rotor speed converged to their actual value has the capacity for estimating position in deferent region (low/zero/high) of speed.
本研究提出了一种基于超扭曲算法(STA-SMSO)的鲁棒无传感器二阶滑模方法,该方法采用一种新的观测器模型参考自适应系统-自适应神经模糊推理系统(MRAS-ANFIS)。将该模型应用于变风速条件下双馈感应发电机(DFIG)风力发电机组,该风力发电机组采用无速度传感器的电压源供电,控制目标独立调节,采用磁场定向控制技术对DFIG定子的有功功率和无功功率进行解耦。此外,该过程通过消除速度传感器(编码器)降低了控制方案的成本和DFIG的尺寸。为了改进传统的MRAS,提出了MRAS-ANFIS观测器,用自适应神经模糊推理系统(ANFIS)控制器取代MRAS自适应机制中常用的PI控制器。在低、零、高速等不同负载条件下,对转子位置的估计进行了测试和讨论。结果表明,与传统的MRAS观测器和MRAS- fuzzy相比,该观测器(MRAS- anfis)具有有限时间收敛性、对风速变化的良好响应、对机器参数变化和负载变化的高鲁棒性等优点。因此,估计转子转速收敛到实际值后,具有估计转速在不同区域(低/零/高)位置的能力。
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引用次数: 0
Modeling and control of islanded DC microgrid fed by intermittent generating resources 间歇发电资源供电的孤岛直流微电网建模与控制
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-02-17 DOI: 10.1177/0309524X231154841
Anupam Kumar, Arun Rathore, S. Singh, A. H. Bhat
In this paper an islanded microgrid fed through the wind and solar energy resources is presented. The power flow within the microgrid is controlled using a Neutral Point Clamped Dual Active Bridge (NPC-DAB) converter. In the proposed dc microgrid, the solar energy source is associated at the low voltage (LV) bus and the wind energy source is connected at the high voltage (HV) bus. A permanent magnet synchronous generator (PMSG) machine is used in wind energy conversion system. The real time solar radiation and wind speed data of Rupangarh, Rajasthan, India is used as an input for renewable energy resource. The NPC-DAB will work as a power electronics juncture for expediting the energy exchange in the islanded DC Microgrid. The proposed closed loop controller based on the capacitor voltage and load voltage will expedite a complete automatic operation of the islanded DC-microgrid considering various load changes. The system is studied without storage element as the automatic control of energy generation and load feeding is carried out by the NPC-DAB, also this makes the scheme cost effective. The optimum duty ratios for NPC-DAB operation are obtained and thus the increased load demand is met. The modeling of PMSG, NPC-DAB and wind energy system is discussed in details in this work. The proposed system is studied in MATLAB/Simulink environment and results are obtained for different load variations. All the wind control parameters, NPC-DAB waveforms, load waveforms are also plotted using MATLAB.
本文提出了一种以风能和太阳能为能量来源的孤岛微电网。微电网内的功率流使用中性点箝位双有源桥(NPC-DAB)转换器进行控制。在所提出的直流微电网中,太阳能电源连接在低压母线上,风能电源连接在高压母线上。永磁同步发电机(PMSG)用于风能转换系统。利用印度拉贾斯坦邦鲁邦加尔的实时太阳辐射和风速数据作为可再生能源的输入。NPC-DAB将作为加速孤岛直流微电网能量交换的电力电子节点。本文提出的基于电容电压和负载电压的闭环控制器将加速考虑各种负载变化的孤岛直流微电网的完全自动化运行。该系统采用NPC-DAB实现发电和负荷馈电的自动控制,在无存储元件的情况下进行了研究,使该方案具有成本效益。得到了NPC-DAB运行的最佳占空比,从而满足了增加的负载需求。本文详细讨论了PMSG、NPC-DAB和风能系统的建模问题。在MATLAB/Simulink环境下对该系统进行了研究,得到了不同负载变化下的结果。并利用MATLAB绘制了所有风控参数、NPC-DAB波形、负载波形。
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引用次数: 3
Assessment of wind resource considering local turbulence based on data acquisition with SODAR 基于SODAR数据采集的考虑局地湍流的风资源评价
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-02-17 DOI: 10.1177/0309524X231156451
Reginaldo N Silva, D. Fantini, Rafael CF Mendes, Marlos Guimarães, T. Oliveira, A. B. Brasil Junior
This work presents a new methodology to evaluate the influence of wind speed data corrections in the fit of the Weibull distribution. Corrections are made for data measured by Sonic Detection and Ranging (SODAR) and MERRA-2 base data. SODAR data are corrected through Turbulence Intensity (TI). The MERRA-2 data correction uses National Institute of Meteorology (INMET) weather station data to find a local scale factor. The results showed that the corrected data present a better fit in the Weibull distribution and evidence that corrections are necessary when wind speed averages are used to evaluate the wind resource. Wind speed data were also applied to simulate the energy production by a commercial turbine to demonstrate the contrast in the total energy generated. The new methodology shows that IT must be considered in the evaluation of wind resources.
本文提出了一种评估风速数据修正对威布尔分布拟合影响的新方法。对声波探测与测距(SODAR)和MERRA-2基础数据进行了修正。SODAR数据通过湍流强度(TI)进行校正。MERRA-2数据校正使用国家气象研究所(INMET)气象站数据来寻找当地尺度因子。结果表明,修正后的数据与威布尔分布拟合较好,表明在风速平均值评价风资源时需要进行修正。风速数据也被应用于模拟商业涡轮机的能量生产,以展示总能量产生的对比。新方法表明,在风资源评价中必须考虑信息技术。
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引用次数: 0
Fatigue analysis of wind turbine composite blade using finite element method 风力机复合材料叶片疲劳有限元分析
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-02-16 DOI: 10.1177/0309524X231155549
H. Boudounit, M. Tarfaoui, D. Saifaoui
In the past 30 years, wind turbine blades (WTB) have undergone significant development, increasing their size and introducing composites into manufacturing processes and using numerical simulation to assess their strength and structural integrity, helped increasing the number of installed wind turbine units as well as reducing the cost of wind generated energy. In this paper a DLoad subroutine was developed to assess monitor and evaluate the structural integrity of a large wind turbine blade under numerous static load scenarios. The fatigue study was carried using the finite element method, and the DLoad subroutine developed was used with ABAQUS finite Element analysis Software, and performed perfectly. The results show that the proposed layup parameters and the chosen composite materials gives to the wind turbine the desired structural strength. Furthermore, the DLoad subroutine for the fatigue study shows that the higher is the applied force the faster the blade fail. While, Hashin Criterion shows that the distribution of damage for the matrix and the fiber is all over the blade, but the failure only occurs after reaching an energy threshold which depends on the composite materials and the layup parameters used. Therefore, the chosen layup model will allow the wind turbine blade to withstand the extreme climatic conditions in the sea.
在过去的30年里,风力涡轮机叶片(WTB)经历了重大的发展,增加了它们的尺寸,将复合材料引入制造过程,并使用数值模拟来评估它们的强度和结构完整性,这有助于增加风力涡轮机装置的数量,并降低风力发电的成本。本文开发了一种DLoad子程序,用于评估、监测和评估大型风力发电机叶片在多种静载荷情况下的结构完整性。采用有限元法进行疲劳研究,开发的DLoad子程序与ABAQUS有限元分析软件结合使用,运行良好。结果表明,所提出的铺层参数和所选择的复合材料可使风力机达到所需的结构强度。此外,用于疲劳研究的DLoad子程序表明,施加的力越大,叶片失效越快。而哈辛准则表明,基体和纤维的损伤分布遍及叶片,但破坏仅在达到能量阈值后才会发生,而能量阈值取决于所使用的复合材料和铺层参数。因此,所选择的铺层模型将使风力涡轮机叶片能够承受海洋中的极端气候条件。
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引用次数: 1
Role of optimization and soft-computing techniques in the design and development of futuristic Savonius wind turbine blades: A review 优化和软计算技术在未来萨沃纽斯风力涡轮机叶片设计和开发中的作用:综述
IF 1.5 Q4 ENERGY & FUELS Pub Date : 2023-02-13 DOI: 10.1177/0309524X221150491
Man Mohan, N. Alom, U. Saha
The use of metropolitan wind power by small-scale wind turbines has become an emerging technique to reduce the battle among growing energy needs. However, the available technical designs are not yet adequate to develop a reliable and distributed wind energy converter for low wind speed conditions. The Savonius wind turbine rotor, or simply Savonius rotor, seems to be particularly promising for such conditions, however, it suffers from low power coefficient. The blade profile/shape is an important aspect of designing the Savonius rotor. In this context, the use of optimization techniques (OTs) along with soft-computing techniques (SCTs) can significantly help to arrive at the intended design parameters. The selection of rotor blades developed through OTs and SCTs can significantly improve the rotor performance. This review study aims to summarize the OTs and SCTs used till date in the blade design of Savonius rotors.
小型风力涡轮机利用都市风力发电已成为一种新兴技术,以减少日益增长的能源需求之间的竞争。然而,现有的技术设计还不足以开发出可靠的分布式低风速条件下的风能变流器。Savonius风力涡轮机转子,或简单的Savonius转子,似乎特别有希望在这种情况下,然而,它遭受低功率系数。叶片型面/形状是萨沃纽斯转子设计的一个重要方面。在这种情况下,使用优化技术(ot)和软计算技术(sct)可以极大地帮助达到预期的设计参数。选择通过OTs和sct开发的转子叶片可以显著提高转子性能。本文综述了迄今为止在Savonius转子叶片设计中应用的OTs和sct。
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引用次数: 1
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Wind Engineering
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