Simulation of load rejection on a nonlinear Hydro Power Plant model with mixed mode nonlinear controller

In this paper revised model of the IEEE working group recommended is used for simulation of transient response of hydro turbine converted to state space model and verification was made using measurements of transients from real Hydro Power Plant (HPP). Nonlinear mixed model controller was designed and implemented into complete HPP simulation model and compared with PID with real parameters used in HPP, and with adjusted PID parameters with consideration of smallest frequency error. Verification of performance of the model was made comparing model response with measured load rejection, which is worst case of HPP operation.