Wind Power Station on Housetop of Buildings in a City

Technical plan for the construction of Wind power Station on Housetop of buildings in a City(WSHC in short) put forward in this paper. The wind force turbine with two wind wheels was adopted in WSHC to capture wind energy and produce electricity as much as possible in the limited area on the housetop. No vanes can go down out of WSHC even if an accident of a vane breaking occurs because two technology protection measures are used here: first, the vanes of a wind wheel are linked up by a thin wire rope at middle of them; second, the webs made of stainless steel wires are fixed at inlet and outlet of the accelerate and orientate device. WSHC belong to environmental friendly and animal harmoniously ones because of the consideration of the webs mentioned above, so that the birds are stopped out of the wind power generator. The grid connection mode of commutating, inversing and connecting to the distribution network of the building was adopted in WSHC. Equipped by a connecting device in-house, each wind power generator can be controlled in max electric production mode during the term when voltage output of the generator higher than 12volts. The diameter of accelerate and orientate device of 3.6m was selected on the consideration about structural-load-carrying capacity of the present building. WSHC can be put into commercial operation in most area of China. Some has evident investment effectiveness because the investment payback time is only 2.4years as wind energy density is 300 W/m², annual generation hours are 6000 hours and electricity price is 0.84yuan/(kW-h).