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

Nonlinear modeling and dynamic analysis of hydro-turbine governing system in the process of load rejection transient
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水轮机调速系统甩负荷暂态过程非线性建模与动态分析

DOI:
10.1016/j.enconman.2014.11.020
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发表时间:
2015-01
影响因子:
10.4
通讯作者:
Wang Feifei
Wang Feifei
中科院分区:
工程技术1区
文献类型:
--
作者:
Zhang Hao;Chen Diyi;Xu Beibei;Wang Feifei

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本文重点研究了水轮机调节系统甩负荷过渡过程的数学建模。作为开创性的工作,在压力管道系统中引入了非线性动力传递系数。考虑发电机系统、水轮机系统和调速器系统,提出了一种新的水轮机调节系统的非线性动力学模型。幸运的是,对于PID参数不变的情况,通过数值仿真得到了甩负荷暂态过程中调节系统的稳定区域。此外,还用分岔图、庞加莱映射、时间波形和相轨道描述了调节系统的非线性动力学行为。更重要的是,这些方法和分析结果将为水电站在甩负荷过程中暂态运行提供理论基础。
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.
混流式水轮机调节系统非线性动力学分析及其控制
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发表时间: 2014-09
期刊: Journal of the Franklin Institute
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