Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 54, Issue -, Pages 136-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2017.05.020
Keywords
Multiple time scales; Fast-slow dynamical effect; Stability; Hydro-turbine governing system
Categories
Funding
- scientific research foundation of National Natural Science Foundation-Outstanding Youth Foundation [51622906]
- National Natural Science Foundation of China [51479173]
- Fundamental Research Funds for the Central Universities [201304030577]
- Scientific research funds of Northwest AF University [2013BSJJ095]
- Science Fund for Excellent Young Scholars from Northwest AF University [Z109021515]
- Shaanxi Nova program [2016KJXX-55]
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Multi-time scales modeling of hydro-turbine governing system is crucial in precise modeling of hydropower plant and provides support for the stability analysis of the system. Considering the inertia and response time of the hydraulic servo system, the hydro-turbine governing system is transformed into the fast-slow hydro-turbine governing system. The effects of the time-scale on the dynamical behavior of the system are analyzed and the fast-slow dynamical behaviors of the system are investigated with different time-scale. Furthermore, the theoretical analysis of the stable regions is presented. The influences of the time-scale on the stable region are analyzed by simulation. The simulation results prove the correctness of the theoretical analysis. More importantly, the methods and results of this paper provide a perspective to multi-time scales modeling of hydro-turbine governing system and contribute to the optimization analysis and control of the system. (C) 2017 Elsevier B.V. All rights reserved.
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