甘肃酒泉大型风电基地对区域气候的影响研究

Impact of Large-scale Wind Power Base Located in Gansu Jiuquan on Regional Climate

大型新能源基地的建成投产可能带来的对局地和周围的地表特征和大气交换特性的改变,以及对局地乃至区域气候产生的潜在影响日益受到关注。为研究甘肃河西走廊酒泉千万千瓦基地的大型风电场的长期气候效应,向区域气候模式(Reg CM)中添加风电场的参数化模型进行模拟,模拟结果表明在大型风电场作用下:1)白天大气边界层高度、不稳定度和垂直风切强度增加,夜间机械湍流变化不大;2)风电场及其下游地区低层大气升温,幅度可达0.3℃;3)地形波加强,促进高空的动量下传,局部地区风速增强;4)周边地区对流降雨日增加1~1.5日/年。

Growing concern is laid on the potential climatic impact of large renewable energy bases on local and regional climate. This impact is induced by alerting the characteristics of land surface and atmosphere exchange in local and surrounding area. To reveal the climatic impact of Gansu Jiuquan large-scale wind power base, with power of ten million kilowatts, located in Hexi Corridor, one regional climate model(RegCM) is adopted in this article. A parameterization model resolving wind farms has been integrated and two-way coupled into RegCM. And the simulation indicates: 1) Daytime ABLH(height of atmospheric boundary layer), ABL instability and vertical wind shear strength all tend to increase, while little change has been found at night; 2) Low-layer air temperature could increase up to 0.3℃ in situ and in its downstream area; 3) The enhanced terrain wave strengthens the momentum exchange, thus wind speed increases correspondingly in specific area; 4) The nearby convective precipitation day number increases by 1~1.5 day/year.