Simulation of the turbines transient operation using the allevi program

Abstract

[EN] When designing hydroelectric power plants it is fundamental to simulate the system behavior in unsteady conditions following a total load rejection. The main objective of this simulation is to define wicket gates closure laws that allow the system to meet certain design specifications. To carry out this simulation the turbine characteristic curves should be used, which are obtained from the hill diagrams of turbines geometrically similar to those to be installed. The Allievi program can be used to carry out this simulation, extrapolating the turbine hill diagram beyond the area covered by the available data. In this paper the simulation of three Francis turbines total load rejection is presented, showing the capabilities of the program and its possibilities to be used in hydropower projects.