Numerical study of hydraulic axial force of prototype pump-turbine pump mode's stop with power down. Issue 1 (June 2021)

• Record Type: Journal Article
• Authors: Mao, Zhongyu; Tao, Ran; Bi, Huili; Luo, Yongyao; Wang, Zhengwei
• Is Part Of: IOP conference series. Volume 774:Issue 1(2021)
• Publication Date: 2021-06
• Subjects: Pump-turbine -- Hydraulic axial thrust -- Simulation -- power down; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/774/1/012094
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Pumped storage power station is regarded as a key component in modern social power system. It usually requires pump-turbine start and stop frequently. The hydraulic axial thrust is one of the most essential effects on the stable operation during start and stop. The hydraulic axial thrusts of pump-turbine pump mode's stop with power down based on 1D transient flow simulation and 3D CFD simulation were carried out in this paper. The hydraulic axial thrusts of two operation conditions show different trends in early stage. In later stage, results show similar characteristics with load-rejection process of turbine mode. The components of Fz including the crown, band and blade reach an obvious peak value with unit operation status change. This study provides the reference for the safety and stable operation of pump storage power stations.