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基于区间划分的风电机组偏航对风误差在线预警方法
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作者 马文涛 《青海电力》 2024年第S01期81-85,共5页
针对目前检测风电机组偏航对风不准需添加额外设备的问题,利用风机机理和数据驱动的方法分析SCADA系统中存储的历史数据,提出基于区间划分的偏航对风不准预警方法。首先根据机组的限电、偏航、故障、维护等状态变量删除无关数据,利用随... 针对目前检测风电机组偏航对风不准需添加额外设备的问题,利用风机机理和数据驱动的方法分析SCADA系统中存储的历史数据,提出基于区间划分的偏航对风不准预警方法。首先根据机组的限电、偏航、故障、维护等状态变量删除无关数据,利用随机森林和3σ原则相结合的方法剔除数据样本中存在的随机噪声,然后对功率进行等区间划分,在每一功率区间内,将风速-偏航误差二维区间内的散点图拟合一条二次曲线,求曲线的最低点对应的偏航误差即为偏航对风误差,试验结果验证了该方法的有效性,最后设计了偏航对风误差在线预警应用系统,实现机组偏航对风误差矫正的闭环落地。 展开更多
关键词 电机组 偏航对风误差 区间划分 最小二乘法
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基于运行数据的风电机组偏航优化控制方法研究 被引量:24
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作者 王欣 吴根勇 +1 位作者 潘东浩 应有 《可再生能源》 CAS 北大核心 2016年第3期413-420,共8页
针对风电机组偏航控制系统在实际应用中自适应水平差、控制精度低等问题,首先利用某风电场的实际运行数据,分析了当前该风场风电机组偏航系统的控制性能;其次根据对风误差随风速的变化特点,提出了分风速段的偏航控制策略优化方案;最后... 针对风电机组偏航控制系统在实际应用中自适应水平差、控制精度低等问题,首先利用某风电场的实际运行数据,分析了当前该风场风电机组偏航系统的控制性能;其次根据对风误差随风速的变化特点,提出了分风速段的偏航控制策略优化方案;最后选择相关性最好的两台机组进行了实验验证。实验结果表明,优化后的偏航控制策略能够在不增加机组偏航次数的前提下有效降低机组的对风误差,提升机组的出力性能。 展开更多
关键词 电机组 偏航控制 对风误差 数据处理 相关分析
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风切变等风况特性对风力发电机组载荷影响研究 被引量:1
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作者 李伟 徐伊丽 《机电工程技术》 2022年第1期97-100,共4页
为了保证风电机组定场址安全性复核时对边界条件的正确选取,更好地保障机组的安全性,基于Bladed软件,以某双馈风力发电机组为例,分析不同风切变、入流角和对风误差等风况特性对风力发电机组关键部位载荷的影响。研究结果表明,叶片摆振... 为了保证风电机组定场址安全性复核时对边界条件的正确选取,更好地保障机组的安全性,基于Bladed软件,以某双馈风力发电机组为例,分析不同风切变、入流角和对风误差等风况特性对风力发电机组关键部位载荷的影响。研究结果表明,叶片摆振与塔架俯仰载荷对对风误差、风切变与入流角敏感度较低,而叶片挥舞与塔架倾覆载荷受对风误差、风切变与入流角影响较大,并且随着风速的增大影响变大。此研究结果能为机组安全性复核时计算边界条件的选取提供一定的依据。 展开更多
关键词 力机组 对风误差 切变 入流角 载荷
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HIGH-RESOLUTION NUMERICAL SIMULATION OF WIND ENERGY RESOURCE IN HAINAN PROVINCE AND ITS OFFSHORE WATERS
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作者 邢旭煌 朱蓉 +1 位作者 翟盘茂 俞卫 《Journal of Tropical Meteorology》 SCIE 2010年第3期292-298,共7页
With high resolution (1 kin), the distribution of wind energy resources in Hainan province and over its offshore waters is numerically simulated by using the Wind Energy Simulation Toolkit (WEST) model developed b... With high resolution (1 kin), the distribution of wind energy resources in Hainan province and over its offshore waters is numerically simulated by using the Wind Energy Simulation Toolkit (WEST) model developed by Meteorological Research Branch of Environment Canada. Compared with observations from eight coastal anemometric towers and 18 existing stations in the province, the simulations show good reproduction of the real distribution of wind resources in Hainan and over its offshore waters, with the relative error of annual mean wind speed being no more than 9% at the 70-m level. Moreover, based on the simulated results of WEST grids that are closest to where the eight wind towers are located, the annual mean wind speeds are further estimated by using the Danish software Wasp (Wind Atlas Analysis and Application Program). The estimated results are then compared with the observations from the towers. It shows that the relative error is also less than 9%. Therefore, WEST and WEST+WAsP will be useful tools for the assessment of wind energy resources in high resolution and selection of wind farm sites in Hainan province and over its offshore waters. 展开更多
关键词 wind energy resources Wind Energy Simulation Toolkit (WEST) wind speed high resolution numerical simulation
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l^1-error estimates on the immersed interface upwind scheme for linear convection equations with piecewise constant coefcients: A simple proof 被引量:3
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作者 JIN Shi QI Peng 《Science China Mathematics》 SCIE 2013年第12期2773-2782,共10页
A linear convection equation with discontinuous coefficients arises in wave propagation through interfaces. An interface condition is needed at the interface to select a unique solution. An upwind scheme that builds t... A linear convection equation with discontinuous coefficients arises in wave propagation through interfaces. An interface condition is needed at the interface to select a unique solution. An upwind scheme that builds this interface condition into its numerical flux is called the immersed interface upwind scheme. An ι1-error estimate of such a scheme was first established by Wen et al. (2008). In this paper, we provide a simple analysis on the ι1-error estimate. The main idea is to formulate the solution to the underline initial-value problem into the sum of solutions to two convection equations with constant coefficients, which can then be estimated using classical methods for the initial or boundary value problems. 展开更多
关键词 ι1-error estimates linear convection equation with discontinuous coefficients immersed interphasemethod
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