The Stability Analysis And Mooring System Calculation Of The Tidal Power Stations

Ocean energy is the richest energy on the earth. It is a kind of clean and reproducible energy. It has many advantages using ocean energy to generate electricity, such as economic, not occupying lands, not being influenced by the climate, not polluting environment. Ocean energy is a kind of new energy with high value and potential in use and will become a very important part in the future new energy. Our country has special ocean geographical advantages and is one of the areas that own vast tidal energy. So how to use tidal power to generate electricity is an urgent problem to deal with.The 70kw tidal power station uses floating body as the carrier of the two turbines. In order to ensure the safety of the tidal power stations it is very important to get out some simple and reliable method to design the mooring system. The 40kw tidal power station which sits on seafloor is being built now. In this paper, the stability of the 40kw station is calculated according to hydrostatic theories and two schemes for installation and examination of the station are presented. Base on the 3-D potential theory, the motions and wave forces in regular waves of the two stations are calculated using the software SESAM. The wind and current forces are calculated according to the formula recommended by American Petroleum Institute and China Classification Society. The wave drift forces are calculated using spectrum analysis method. According to the characteristics of the working zone of the tidal power stations several mooring system design schemes are forwarded respectively for the 70kw and 40kw station. The calculation shows that each of the schemes can meet the demand of safety.