基于CFD技术进行复杂地形风资源评估及验证

摘要：目前风电场开发项目涉及较多复杂地形的区域，以往的线性模型由于本身的模型限制，对风资源评估产生较大的不确定性，同时由于项目测风塔数量较多，如何进行多个测风塔的综合分析利用，得到可靠的结果，这也是复杂地形风能资源评估的核心问题之一。本文针对河北风电场实际工程项目，采用基于计算流体力学技术的法国美迪WT软件进行此项目的风资源评估，并通过现场多个测风塔的外推结果，来验证美迪WT软件在复杂地形条件下进行风资源计算评估的可靠性，在以往线性模型的基础上增加了风资源评估的手段与方法。

关键词：复杂地形，风资源，CFD，美迪WT

Abstract: at present, the wind farm development project involves more complex terrain area, the former linear model because of their limited model, the wind resources evaluation produce greater uncertainty, at the same time as the wind towers project quantity, how to measure wind towers over the comprehensive analysis of the use of, have a reliable results, this also is the complicated terrain wind resources evaluation one of the core problems. This article in view of the actual project hebei wind farms, the computational fluid dynamics technology based on the French meidi WT software to the project, the wind resources evaluation, and through the field more measured the wind towers outside push results, to verify the software in the complex terrain meidi WT under conditions of the wind resources evaluation calculation of reliability, in past the linear model based on wind resources evaluation of increased means and methods.

Keywords: complex terrain, the wind resource, CFD, meidi WT

1、引言

本项目工程位于河北省北部山区，项目总面积约120平方公里，测风塔4座，林区覆盖，但山顶为荒草地，海拔在1400-2200米之间，海拔变化较大，气候条件恶劣，经常出现大风及降雪天气，是典型的复杂地形项目。如采用以往的线性模型分析，则会带来较大的不确定性，基于此本工程项目采用基于计算流体力学技术的美迪WT软件进行整个风流场的计算及分析。项目地形数据如下所示：

图1、地形及测风塔位置示意图（从左向右W1/W2/W3/E1）