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

作者：Li, Huanhuan; Chen, Diyi^*; Zhang, Hao; Wang, Feifei; Ba, Duoduo

来源：Mechanical Systems and Signal Processing, 2016, 80: 414-428.

DOI：10.1016/j.ymssp.2016.04.006

• Hydro-turbine
• Mathematical modeling
• Sudden load increase
• Dynamic transfer coefficients
• Nonlinear dynamics

In order to study the nonlinear dynamic behaviors of a hydro-turbine governing system in the process of sudden load increase transient, we establish a novel nonlinear dynamic model of the hydro-turbine governing system which considers the elastic water-hammer model of the penstock and the second-order model of the generator. The six nonlinear dynamic transfer coefficients of the hydro-turbine are innovatively proposed by utilizing internal characteristics and analyzing the change laws of the characteristic parameters of the hydro-turbine governing system. Moreover, from the point of view of engineering, the nonlinear dynamic behaviors of the above system are exhaustively investigated based on bifurcation diagrams and time waveforms. More importantly, all of the above analyses supply theoretical basis for allowing a hydropower station to maintain a stable operation in the process of sudden load increase transient.

• 出版日期2016-12-1
• 单位中国水利水电科学研究院; 西北农林科技大学