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Generic modeling and speed control approach of hydraulic power plants: Start-up operating mode

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  • Mohamed, Amgad
  • Alamir, Mazen
  • Alloin, Quentin

Abstract

In this paper, we propose a complete modeling approach of hydraulic power plants and a control solution to improve the start-up performance of hydraulic turbines. This paper presents a novel simple speed controller that is capable of starting-up hydraulic turbines fast enough while limiting sharp pressure head oscillations. Its simplicity makes it easy to adopt by practitioners, and capable of running on existing power plants which utilize microcontrollers with limited computational abilities. The controller structure proposed in this paper has the potential of being tuned such that closed-loop stability is guaranteed and upper bounds on asymptotic tracking error are minimized. A modular mathematical model is also proposed where the method of characteristics is used to model water dynamics in multiple penstocks used in hydraulic power plants. The main problem that rises when modeling a system of multiple penstocks is systematically choosing the sampling period. Therefore, we propose a systematic approach to choose any sampling period. This leads to the development of a modular hydraulic simulator that takes into account power plants with multiple penstocks, the nonlinear dynamics of the hydraulic turbine, modeled by regression models generated using Hill charts data points and the guide vanes opening actuator’s full nonlinear dynamics.

Suggested Citation

  • Mohamed, Amgad & Alamir, Mazen & Alloin, Quentin, 2020. "Generic modeling and speed control approach of hydraulic power plants: Start-up operating mode," Renewable Energy, Elsevier, vol. 160(C), pages 1-15.
    • Handle: RePEc:eee:renene:v:160:y:2020:i:c:p:1-15
    DOI: 10.1016/j.renene.2020.05.152
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    References listed on IDEAS

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    1. Zuo, Zhigang & Fan, Honggang & Liu, Shuhong & Wu, Yulin, 2016. "S-shaped characteristics on the performance curves of pump-turbines in turbine mode – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 836-851.
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    1. Lei, Liuwei & Li, Feng & Kheav, Kimleng & Jiang, Wei & Luo, Xingqi & Patelli, Edoardo & Xu, Beibei & Chen, Diyi, 2021. "A start-up optimization strategy of a hydroelectric generating system: From a symmetrical structure to asymmetric structure on diversion pipes," Renewable Energy, Elsevier, vol. 180(C), pages 1148-1165.
    2. Wang, Cong & Wang, Dekuan & Zhang, Jianming, 2021. "Experimental study on isolated operation of hydro-turbine governing system of Lunzua hydropower station in Zambia," Renewable Energy, Elsevier, vol. 180(C), pages 1237-1247.

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