基于单–双高斯模型拟合法的测风激光雷达海上风电机组尾流特征分析

大气与环境光学学报 ›› 2021, Vol. 16 ›› Issue (1): 44-57.

基于单–双高斯模型拟合法的测风激光雷达海上风电机组尾流特征分析

刘清媛1, 吴松华1,2,3∗, 张凯临1,3, 李荣忠1,3, 翟晓春1

1 中国海洋大学信息科学与工程学院, 海洋遥感研究所, 山东青岛 266100; 2 青岛海洋科学与技术试点国家实验室, 区域海洋动力学与数值模拟功能实验室, 山东青岛 266237; 3 青岛镭测创芯科技有限公司, 山东青岛 266101

出版日期:2021-01-28 发布日期:2021-02-02
通讯作者: E-mail: wush@ouc.edu.cn
作者简介:刘清媛 (1995- ), 女, 海南海口人, 硕士, 主要从事海洋与大气风场探测, 多普勒测风激光雷达数据处理方面的研究。E-mail: 1006912389@qq.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 61975191, 41375016, 41471309)

Offshore Wind Turbine Wake Characteristics Analysis Using Single-Double Gaussian Model Based on Wind Lidar Measurements

1 College of Information Science and Engineering, Ocean Remote Sensing Institute, Ocean University of China, Qingdao 266100, China; 2 Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. 3 Qingdao Leice Transient Technology Co., Ltd., Qingdao 266101, China

Published:2021-01-28 Online:2021-02-02

摘要/Abstract

摘要： 当气流经过风电机组的扫风平面时, 风电机组下风处产生的尾流效应会对风电机组的发电效率、疲劳载荷产生不同程度的影响。基于相干多普勒测风激光雷达在江苏某海上风电场开展了全天候风场观测实验。由于紧邻风电机组的尾流垂直截面上风速呈双高斯分布规律, 利用传统单高斯拟合算法存在计算误差较大, 无法反映真实流场风速变化规律, 提出了一种单–双高斯模型拟合改进算法, 分析了目标风电机组尾流的尾流宽度、风速损失率和尾流长度等参数特征, 研究结果验证了单–双高斯拟合算法对尾流横向风速拟合的可行性和准确性。

关键词: 多普勒测风激光雷达, 风电机组, 尾流效应, 高斯模型拟合算法

Abstract: When the air flow passes through the sweep plane of the wind turbine, the wake effect will be produced at the downstream of the wind turbine, which has different effects on the generation efficiency and fatigue load of the wind turbine. Based on coherent Doppler wind lidar, an all-weather wind field detection experiment was carried out in an offshore wind farm in Jiangsu Province. Due to the double Gaussian distribution of wind speed on the vertical section of the wind turbine wake, the traditional single Gaussian fitting algorithm has a large calculation error and can′t reflect the wind speed change law of real flow field near the wind turbine. An improved single-double Gaussian model fitting algorithm is proposed and used to analyze the wake width, velocity deficit and wake length of the target wind turbine. The feasibility and accuracy of the single-double Gaussian fitting algorithm for the fitting of the wake lateral wind speed are verified.

Key words: Doppler wind lidar, wind turbine, wake effect, Gaussian model fitting algorithm

中图分类号:

TN958
P407

刘清媛, 吴松华, ∗, 张凯临, 李荣忠, 翟晓春. 基于单–双高斯模型拟合法的测风激光雷达海上风电机组尾流特征分析[J]. 大气与环境光学学报, 2021, 16(1): 44-57.

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