Title: Analysis on hydraulic transient of long trailrace tunnel without tailrace surge tank for Silin Hydropower Station
Abstract: The layout of the water diversion system for Silin Hydropower Station is diversion tunnel,single penstock and single trailrace tunnel for single turbine;in which the length of the pressure diversion conduit is 335 m,the pressure tailrace tunnel is 210 m long and the inertial time constant of the flow in the pressure conduit is 4.13 s.Under this condition,the problem of the backwater hammer in the tailrace tunnel is quite serious.So far as this is concerned,the design of the hydropower station with the cancellation of the conventional surge tank for the tailrace is discussed herein,which solves the problem from the backwater hammer for the long tailrace tunnel effectively through optimizing the parameters of the flow conduit system,the turbine and the governing system concerned.With this design,the stability of the hydraulic transient has met the requirement of the relevant specification,and then the safe and economic operation of the project has been guaranteed as well.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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