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

作者：Zhang Hao; Chen Diyi^*; Xu Beibei; Wang Feifei

来源：Energy Conversion and Management, 2015, 90: 128-137.

DOI：10.1016/j.enconman.2014.11.020

• Hydro-turbine governing system
• Dynamic transfer coefficients
• Nonlinear dynamics
• Mathematical modeling

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.

• 出版日期2015-1-15
• 单位中国水利水电科学研究院; 西北农林科技大学