摘要
为了深入研究混流式水电站系统的稳定性问题,在简单式调压井模型基础上,考虑弹性水击效应、发电机转子二阶动态模型等因素,建立起了新的调压井单机单管混流式水轮机调节系统的非线性数学模型。通过分岔图、Poincare映射图、功率谱图、时域图、相轨迹图、频谱图等非线性动力学特征,分析了调速器参数变化时水轮机调节系统的非线性动力学响应,得出系统的动力学变化规律和特征,初步确定系统稳定运行的参数调节范围,为混流式水电站系统正常运行提供了理论参考。
In order to study the nonlinear dynamical behavior of hydro-turbine governing system,a new dynamical model for the hydro-turbine governing system with elastic water hammer-impact and the second order model of generator was established,which is based on the model of simple surge shaft.By virtue of bifurcation diagram,Poincare maps,the power spectrum diagram,the time domain diagram,the orbits diagram and the spectrum diagram,the nonlinear dynamical responses of generator’s relative deviation of rotational seed and the water pressure at the entrance of surge shaft were analyzed.Through the analysis,the adjustable range of the speed governor that ensure governing systems stable operation were got.The results provide important simulation reference for the safety operation of hydro-turbine system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第32期116-123,19,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51109180)
西北农林科技大学人才专项基金(RCZX-2009-01)~~
关键词
水轮机调节系统
调压井
弹性水击
分岔
非线性动力学
hydro-turbine governing system
surge shaft
elastic water hammer
bifurcation
nonlinear dynamics
