Non-linear Hydromechanical and Electrical Coupled Model of 1400MW Hydropower Plant for Governor Tuning Application

This paper presents the detailed non-linear mathematical model of hydraulic, mechanical and electrical coupled components of a 1400MW hydropower plant (HPP). Attention is given to the dynamic response of HPP complete coupled system considering the non-linearity of the hydro turbine governor system (HTGS), penstock, turbine and excitation system. The Hopf bifurcation technique for time delay system is employed to obtain the stable operating region of the PID controller in the governor. The Runge-Kutta 4th order (RK4) time-domain numerical method is used to solve the system differential equations and the results are illustrated by phase portraits and the time-domain waveforms. The advantage of better and efficient tuning of the HPP control system using coupled model is presented with results.