Session: 03-06 Fluid-Structure Interaction

Paper Number: 87698

87698 - Pumped Storage Plant (PSP) Bajina Basta – Numerical and Field Tests of Hydraulic Transients – Case Studies 

PSP Bajina Basta is located in Serbia, with the first unit commissioned in June 1980. At that time, it was a PSP with the largest head in the world of 600 m, where two pump turbines are installed (2 x 315 MW). This paper was presented the four-quadrant (4Q) characteristics (in the form of Suter curves Wh and Wm) for a pump-turbine model of PSP Bajina Basta with specific speeds nq=27 (for different wicket gate openings). These characteristics are used as input data to the developed numerical code for the calculation of transient processes on PSP (Pumped Storage Plant) Bajina Basta. The calculation of transient processes during simultaneous load rejection of both pump–turbines (pump-turbine 1 with the power of 280 MW and pump turbine 2 with the power of 280 MW) was analyzed. The investigation included several hydraulic conditions including emergency shut-down, both the start-up and stopping of each unit, as well as load rejection under governor control from different initial powers. The method of characteristics is used for obtaining numerical results, in a representation that included the characteristics of each associated pump-turbine and the full flow system. The impact of emergency shut-down and load rejection on the pump-turbine speed changes and penstock pressure are reported and experimental and numerical results are compared.

Presenting Author: Zdravko Giljen University Belgrade Mechanical Faculty