Abstract
The transient process in conduits of hydropower stations is a very complicated dynamic procedure coupled with fluid, machines, electricity. In this paper, a whole nonlinear dynamical model of transient process in hydropower station with Francis turbine has been developed, and the control strategies of each transient process are studied. The nonlinear characteristics of hydraulic turbine and the elastic water hammer effect of pressure water supply conduit are considered in the model. The developed model is accurate enough to represent and simulate each transient process of the plant and may enable a plant operator to carry out economical, convenient study for the static stability and transient stability of the hydropower station under a wide range of transient processes. In addition, the literature takes a hydropower station as engineering case to simulate the transient processes of hydro-generator units' start-up, load variation, full load rejection from the grid and emergency stop. And the results of simulation are very satisfied.
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