PubAg

Main content area

Nonlinear modeling and dynamic analysis of hydro-turbine governing system in the process of load rejection transient

Author:
Zhang, Hao, Chen, Diyi, Xu, Beibei, Wang, Feifei
Source:
Energy conversion and management 2015 v.90 pp. 128-137
ISSN:
0196-8904
Subject:
dynamic models, nonlinear models, turbines, water power
Abstract:
This article pays attention to the mathematical modeling of a hydro-turbine governing system in the process of load rejection transient. As a pioneer work, the nonlinear dynamic transfer coefficients are introduced in a penstock system. Considering a generator system, a turbine system and a governor system, we present a novel nonlinear dynamical model of a hydro-turbine governing system. Fortunately, for the unchanged of PID parameters, we acquire the stable regions of the governing system in the process of load rejection transient by numerical simulations. Moreover, the nonlinear dynamic behaviors of the governing system are illustrated by bifurcation diagrams, Poincare maps, time waveforms and phase orbits. More importantly, these methods and analytic results will present theoretical groundwork for allowing a hydropower station in the process of load rejection transient.
Agid:
6035730