S-shaped characteristics on the performance curves of pump-turbines in turbine mode – A review

Zhigang Zuo, Honggang Fan, Shuhong Liu and Yulin Wu

Renewable and Sustainable Energy Reviews, 2016, vol. 60, issue C, 836-851

Abstract: S-shaped characteristics on the performance curves of pump-turbines in turbine mode promote instability problems in associated transient processes, e.g., difficulties in synchronizing with power grid in turbine start-ups, unstable performance in turbine load rejections, etc. The present paper presents and discusses relative studies on the S-shaped characteristics, which have been carried out by various investigators. Studies include system instability analysis, experimental and numerical investigations on the flow mechanism of pump-turbines, studies on the influencing geometric and operating parameters of the unit, and precautions and countermeasures to improve the S-shaped characteristics and instability problems in associated transient processes.

Keywords: Pump-turbines; S-shaped characteristics; Instability (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (39)

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DOI: 10.1016/j.rser.2015.12.312

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