激光雷达光束扫描及改进型VAD反演方法的仿真

为了弥补激光测风雷达风场反演速度方位显示法的不足、提高反演风速精度,提出了一种改进的方法。运用迭代预处理的方法提高原始雷达数据质量,消除小幅值风速和奇异点的影响,用统计求和平均的方法反演出3维风场;并建立了风场模型,通过数值计算软件进行了仿真和误差分析。结果表明,改进的方法反演出风速的误差不超过0.5m/s,比传统速度方位显示算法的精度提高了1倍。     

以礼河电厂冲击式机组流量效率在线监测的可行性研究

流量效率等运行参数的在线监测，是水电厂实现经济运行，提高发电效益的基础，也是现代水电厂告别旧的运行管理方式的重要标志之一．以礼河４级作为一个已投运多年且机组又属冲击型的电站，实现流量效率的在线监测前景如何？本文论证了其可行性，并提出了实现方案．     

汤峪水电站突甩负荷过渡过程的数值解

运用外特性数值解法，结合汤峪水电站具体情况，建立了突甩负荷过渡过程求解的数学模型，并编制了计算程序；针对不同导叶关闭规律和不同调压阀行程及其组合情况，进行了多种方案的求解，从而了解了有关水力要素及机组工况参数的瞬变规律，为电站的安全稳定运行提供了依据     

混流式水轮机导叶减压设施改造

介绍了一种中、高水头混流式水轮机导叶减压抗浮的新方法，并在基本论证的基础上，对其推广使用价值，得出了肯定的结论。     

风力发电场建设中的危险源辨识与应急管理

风力发电场的建设中建立施工安全重大危险源预警机制,完善风电场建设施工应急救援体系是健全和提高风电场建设施工安全管理水平,实施安全生产与应急管理的重要内容。结合工程实际情况,对风电场的危险源辨识与应急管理进行一些初步的探讨。     

深度神经网络在风电功率预测中的应用研究

风电功率预测对于电网建设具有重要意义。文中提出一种基于深度神经网络的风电功率预测方法,该方法充分考虑了影响风电功率的若干因素,如风速、风向、空气密度和季节,通过深度神经网络训练、学习给出最佳的功率预测值。通过深度神经网络学习的特征能够更为有效地反映实际情况,因此提高了风电功率预测的稳健性。基于内蒙古某风电厂的实测数据进行了验证实验,结果表明了提出方法的有效性。     

新疆地区陆上风电场风机尾流特征分析

风机的尾流效应会导致风能的转化效率下降,还会增加湍流引起的机械应力损伤,降低风机的稳定性和 服务寿命。为研究新疆地区陆上风电场风机尾流特征, 2015年11月于新疆地区陆上风电场使用脉冲相干多普勒激光雷达进行风场观测。通过分析得到 新疆地区陆上风电场风机尾流特征,主要包括风速损失率、尾流宽度、尾流长度及其平均结果, 最大风速损失率,尾流长度随时间的变化趋势、与风速之间的关系等,发现风速损失率、 尾流宽度、尾流长度与背景风速、湍流强度有关。     

Insights in wind turbine drive train dynamics gathered by validating advanced models on a newly developed 13.2 MW dynamically controlled test-rig

Guaranteeing reliable and cost-effective wind turbine drive trains requires expert insights in dynamics during operation. A combination of advanced modeling techniques and detailed measurements are suggested to realize this goal. The flexible multibody modeling technique enables the simulation of dynamic loads on all drive train components. Moreover it facilitates estimation of structural component deformation caused by dynamic loading. This paper gives a detailed overview of the assumptions made in this modeling approach. Furthermore the influence of the different structural component flexibilities is investigated in detail. To gain confidence in the models created, model validation by means of a comparison with measurements is necessary. To overcome issues concerning test repeatability experienced in field testing, test-rig testing is suggested as a valid alternative. In order to be representative, dedicated dynamic load cases, which represent specific dynamic behavior of the gearbox in a wind turbine need to be realized on the test-rig. However a highly dynamic test-rig complying with the specifications was not commercially available. Therefore Hansen developed a high dynamic test-rig with a nominal power of 13.2 MW and a peak power capacity of 16.8 MW. A back-to-back gearbox configuration was used. The complexity of controlling dynamics of the test-rig was solved by identifying dedicated load cases which represent specific wind turbine behavior. This paper describes the development process of the project consisting of four phases. During two phases a scaled set-up was used, which enabled iterative optimization of the complex interaction between the mechanical dynamics and the electrical controller of the test-rig. In the final part of the paper the two previously discussed approaches are combined, as it discusses results from the validation of simulation models using measurements performed on the 13.2 MW test-rig.     

矿区配电架空线路雷电波过电压事故分析

针对风机房进线架空线路雷电事故的问题,从差异性、精细化防雷准则入手,采用进线段保护加装保护间隙与线路绝缘子进行绝缘配合、降低线路避雷器接地体接地电阻以及用双曲折防雷变压器替代风机房所用变压等改造措施,使雷电流取5 mA时风机房进线端冲击电压81.33 kV降低到12.56 kV。利用暂态仿真软件ATP-EMTP对线路绝缘子并联保护间隙和线路避雷器接地电阻进行仿真验证,验证改造措施的防雷效果。     

VXI总线和G语言在风速实验中的应用

介绍了如何通过HP E1529远端应变信号调节单元、HPE 1422A A/D转换模块和Labview软件平台开发一个适于风速实验的测试系统。