Analysis on operation safety and stability for diversion-type hydropower station after extension

In order to utilize water resources sufficiently and optimize the operation mode,extension for the large and medium sized hydropower stations to increase their capacities becomes one of the important developing ways.For the operation of the diversion-type hydropower station after extension,the main problem comes from the safe and stable operations of both the extended generating units and the original ones and the hydraulic influence of their interaction therein.Based on a algorithm integrated by the method of characteristics for the pressurized pipeline and the analysis with the state equations,the stabilities during the transient processes of large fluctuation,tiny fluctuation and hydraulic disturbance for the hydropower station after extension are emphatically analyzed herein,and then a reliable basis for the design and the safe operation of the similar hydropower stations is given incorporated with the specific analysis made on the actual as well.