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Transient dynamic analysis of a pump-turbine with hysteresis effect.
- Source :
-
Modern Physics Letters B . 4/30/2020, Vol. 34 Issue 12, pN.PAG-N.PAG. 16p. - Publication Year :
- 2020
-
Abstract
- Hysteresis effect, which has a significant impact on transient characteristics of a pump-turbine, attracts more and more researchers' attention and shows great potential. Influences of hysteresis on dynamic characteristics of a pump-turbine are investigated during the transient process in this paper. Transient trajectories of pump-turbines actually do not match their static operation trajectories, especially in the condition of turbine braking. In order to establish a transient model of a pump-turbine in different moving directions of dynamic trajectories, time delays among the relative parameters are introduced in this paper. Furthermore, effects of hysteresis on the dynamic characteristics of the pump-turbine are analyzed in detail by using numerical simulation. Based on the established transient model, influences of unit head on the dynamic characteristics of the pump-turbine are studied during the bidirectional transient process. The simulation results show the transient characteristic of the pump-turbine can be improved with the enhancement of hysteresis effect. While it gradually loses stability with the increase of hysteresis. The conclusions provide us a new approach for regulating the transient performance and stability of pump-turbines by using hysteresis effect during transient process. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYSTERESIS
*TRANSIENT analysis
*TURBINES
*COMPUTER simulation
*HYSTERESIS motors
Subjects
Details
- Language :
- English
- ISSN :
- 02179849
- Volume :
- 34
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Modern Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- 143026207
- Full Text :
- https://doi.org/10.1142/S0217984920501250