Linear and Nonlinear Model of Hydro Generator System with Surge and its Simulation

Abstract

According to different hydraulic structure of practical hydraulic power system, combined with hydro dynamic principle, analyzing and deducing unelastic water hammer effect linear model and nonlinear model for system of tunnel-surge-penstock-generator unit (hydro generator system with surge) by divided the hydro power system with surge into two subsystem: reservoir-tunnel-surge and surge-penstock-generator unit in this paper. The simulation results of models demonstrate that the established models can excellently reflect the inherent oscillation performance for hydro power system with surge and it is not appropriate for substituting the classical ideal hydro turbine model for hydro power system model with surge during the course of investigation.