共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
大型并网风力发电机组的关键技术是机组的控制系统。本文描述了这种控制系统的软并网装置,通用控制器与风力机组输入-输出信号模板,专用大型并网型风力机监控管理软件设计、整机的现场联机运行调试及全自动无故障运行。 相似文献
3.
介绍了一种车载微机控制器插件板测试台的组成及测试过程,对其工作原理进行了分析,并介绍了上位机软件和插件板专用测试软件的设计方法。 相似文献
4.
5.
6.
7.
8.
蒋维 《电网与水力发电进展》2012,28(12):79-83
风电机组的状态监测和故障诊断是保证机组长期稳定运行和安全发电的关键。风电机组传动链系统的故障种类繁多,原因复杂,其故障征兆、故障原因和故障机理之间存在着极大的不确定性。文中在其故障诊断过程中,首先利用粗糙集原理对其特征参数进行约简,去除冗余参数,再利用粗糙集理论定量确定各特征参数的重要程度;根据约简的特征参数和各参数的重要程度,利用灰色关联度分析方法确定标准故障状态与目前机组状态的关联度,从而找到其故障之处。实例计算表明:在风电机组的故障诊断中将灰色系统理论和粗糙集理论结合是一种有效的方法,为其今后开展智能故障诊断提供了理论基础。 相似文献
9.
选用华锐风电1.5 MW变速恒频双馈式风力发电机SL1500/61为基本模型,对装配3种不同类型导流罩的风力发电机组机舱与叶片进行融合建模,通过数值模拟分析方法进行整体模型的合理性验证。在极限风速下分析3种导流罩及机舱附近流场的空气动力学特性,结果表明,风机叶片的尾流速度差距约1 m/s,阻力型导流罩前端的高压面积最大,装配W型导流罩的风机机舱表面压力特性优于其他类型,不同导流罩表面的涡粘性存在明显的差距。叶片融合技术可以较好地解决叶片根部与导流罩端壁连接处所存在的角区流动现象,达到减小误差的导流效果。 相似文献
10.
11.
12.
基于模态叠加理论对风电叶片后缘疲劳加载设备摇臂支架进行模态分析和拓扑结构优化。文章通过对风电叶片后缘疲劳加载模型进行合理简化,对摇臂支架所受载荷进行了等效分析,建立了摇臂支架的有限元模型,进而基于模态叠加法对摇臂支架进行动力学响应分析,得到了各阶次的频率分布情况。最后,以各板件厚度为约束条件,建立以质量最轻为目标函数的数学模型,结合OptiStruct软件得到了优化结果。结果表明,优化后的摇臂支架质量减少了985 kg,且在相同工况下,摇臂支架的变形量减少了4.7 mm,验证了优化后摇臂支架结构的可行性,为后缘加载装备的工程应用提供了理论支撑。 相似文献
13.
14.
In this paper, the power performance of straight-bladed VAWT is experimentally investigated by wind tunnel experiment and field test. The test rotor is two-bladed with NACA0021 airfoil profile. A survey of varying unsteady wind parameters is conducted to examine the effects of blade pitch angle, Reynolds number and wind velocity on the power performance of VAWT. Moreover, the flow field characteristics are obtained through measuring the wind velocity by Laser Doppler Velocimeter (LDV) system in the wind tunnel experiment and three-cup type anemometers in field test. Power and torque performance are obtained through a torque meter installed in rotor shaft of the wind turbine. Experimental results estimated from the measured values from field test and wind tunnel experiment are compared. In this research, power performance and flow field characteristics are discussed and the relationship between operating conditions and wind velocity are verified. These results provided a theoretical guiding significance to the development of VAWT simplified. 相似文献
15.
16.
Mean wind force coefficients of nacelles are investigated by a wind tunnel test and are compared with those in current codes, such as the Germanischer Lloyd Guideline 2010 (GL2010) and Eurocode, in order to clarify the effects of the ground, presence of a hub, turbulence in the incident flow and nacelle length on these coefficients. Formulas for the mean wind force coefficients are proposed as a function of yaw angles. It is found that mean wind force coefficients of wind turbine nacelles specified in GL2010 are underestimated in comparison with those obtained by wind tunnel tests. Pressure measurements of a nacelle are also conducted. Notably, the mean pressure coefficients for design load case 6.2 (DLC6.2) are significantly larger than those for design load case 6.1 (DLC6.1) in IEC61400‐1. Maximum and minimum mean pressure coefficients are proposed for the DLC6.1 and DLC6.2 by the wind tunnel test, which are similar to those in Eurocode and are larger than those proposed in GL2010. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
17.
The dynamics of wind turbine behavior are complex and a critical area of study for the wind industry. Identification of factors that cause changes in turbine performance can sometimes prove to be challenging, whereas other times, it can be intuitive. The quantification of the effect that these factors have is valuable for making improvements to both power performance and turbine health. In commercial farms, large quantities of meteorological and performance data are commonly collected to monitor daily operations. These data can also be used to analyze the relationship between each parameter in order to better understand the interactions that occur and the information contained within these signals. In this global sensitivity analysis, a neural network is used to model select wind turbine supervisory control and data acquisition system parameters for an array of turbines from a commercial wind farm that exhibit signs of wake interaction. An extended Fourier amplitude sensitivity test is then performed for 2 years of 10‐min averaged data. The study examines the primary and combined sensitivities of power output to each selected parameter for two turbines in the array. The primary sensitivities correspond to single parameter interactions, whereas combined sensitivities account for interactions between multiple parameters simultaneously. Highly influential parameters such as wind speed and rotor rotation frequency produce expected results; the extended Fourier amplitude sensitivity test method proved effective at quantifying the sensitivity of a wide range of more subtle inputs. These include blade pitch, yaw position, main bearing and ambient temperatures as well as wind speed and yaw position standard deviation. The technique holds promise for application in full‐scale wake studies where it might be used to determine the benefits of emerging power optimization strategies such as active wake management. The field of structural health monitoring can also benefit from this method. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
18.
开发利用洁净能源和可再生能源,改善以煤炭为主的能源结构已成为我国能源建设实现可持续发展战略的重要措施。目前,国内外以风能力代表的新能源的开发利用方兴未艾。通过对国内外风电发展现状的调查研究及国内风电市场发展前景的分析与展望,提出发展风电制造业的一些具体措施,加速能源结构的调整。 相似文献
19.
20.
The concept of a smart wind turbine system 总被引:1,自引:0,他引:1
A smart wind turbine concept with variable length blades and an innovative hybrid mechanical-electrical power conversion system was analyzed. The variable length blade concept uses the idea of extending the turbine blades when wind speeds fall below rated level, hence increasing the swept area, and thus maintaining a relatively high power output. It is shown for a typical site, that the annual energy output of such a wind turbine that could double its blade length, could be twice that of a corresponding turbine with fixed length blades. From a cost analysis, it is shown that the concept would be feasible if the cost of the rotor could be kept less than 4.3 times the cost of a standard rotor with fixed length blades. Given the variable length blade turbine system exhibits a more-or-less linear maximum power curve, as opposed to a non-linear curve for the standard turbine, an innovative hybrid mechanical-electrical power conversion system was proposed and tested proving the feasibility of the concept. 相似文献