The Application Of Frequency Converter And PLC In High Building Water Supply

In recent years, to reduce the repair time is always the serious problem with steam turbine being closed. Fast cooling technology is applied in the site, but there are many problems, such as longer time, etc. So it is an important value to investigate the fast cooling technology of turbine.Based on these, the 200MW turbine unit of Panxian Thermal Power Plant is selected, and the key problems are analyzed, such as, selection of cool medium, flow path of medium, thermal stress during fast cooling etc. The CFD software is adopted, and the maximal thermal stress, the optimum cooling model and system, and the autocontrol scheme during fast cooling, are gotten. In the end, the results are applied in the site.The optimum cooling model and system, and the autocontrol scheme would be provided reference as the other similar units.