Northeast China, North China, a vast grassland, is rich with wind energy, wind power density above 200 ~ 300 W/m2, some up to 500 W/m2 over, and the effective time of up to 6000 ~ 7000 hours. Anhui Hummer Dynamo Co., Ltd. in Anhui for Prairie "wind power density, wind speed and uniform, the effective wind speed in a long time," the characteristics of a well-off wind turbine configuration grassland, grassland comfortable even in summer, small prairie wind, can & ldquo ; with freezers, water pumps. " Relatively low price, definitely a small, simple is not simple, and the wind generators