“大风起兮云飞扬。”从古至今,风吹得大地遍黄沙,吹得碎石大如斗。然而,呼啸不定的风,也唤起了有识之士的灵感。人类利用风能已久。公元前二三千年时,尼罗河和黄河上就都相继扬起了风帆。1891年,丹麦拉库尔教授研制成了用风轮驱动的两台9千瓦直流发电机,从此人类利用风能开创了新纪元。 “Gale flies from the cloud.” From ancient times, the wind blown the earth all over the sand and blown the gravel like a bucket. However, the whistling wind also aroused the inspiration of people of insight. Human use of wind energy has long been. Two or three thousand years BC, the Nile and the Yellow River have all raised their sails. In 1891, Professor Rakol of Denmark developed two 9kw DC generators driven by wind turbines, from which mankind started a new era by using wind energy.