Simulation of reduced order hydro turbine models to study its hydraulic transient characteristics

Abstract

The elasticity of water column effect in penstock of a hydro power plant represents an irrational term in turbine-penstock transfer function (TF) model. In this paper, this function is reduced to an order r= 1,2,3 & 4 using H-infinity approximant method. The gate position-turbine power nonlinear steady-state characteristic is modeled for these reduced order TFs. The dynamic characteristic is determined using multi-step signal. And the time-domain and frequency-domain simulations of turbine power are presented and compared with widely known Pade approximant method