Variable speed operation of reversible pump-turbines at Kadamparai pumped storage plant – A case study

Sivakumar, N.; Das, Devadutta; Padhy, Narayana Prasad

doi:10.1016/j.enconman.2013.10.048

Cited by 64 publications

(18 citation statements)

References 21 publications

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“…They concluded that it was more compact, had a fast response speed, high control precision, and low current harmonic distortion compared to conventional static frequency converters. Sivakumar et al [8] studied adding variable-speed induction generators to the Kadamparai pumped-storage plant modernization project, and recommend choosing variable-speed technology for its improved efficiency and better grid frequency control.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic design and optimization of a modular pump-turbine runner

Schleicher

Öztekin

2015

Energy Conversion and Management

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a b s t r a c tA novel modular pumped-storage scheme is investigated that uses elevated water storage towers and cement pools as the upper and lower reservoirs. The scheme serves a second purpose as part of the wastewater treatment process, providing multiple benefits besides energy storage. A small pumped-storage scheme has been shown to be a competitive energy storage solution for micro renewable energy grids; however, pumped-storage schemes have not been implemented on scales smaller than megawatts. Off-the-shelf runner designs are not available for modular pumped-storage schemes, so a custom runner design is sought. A preliminary hydraulic design for a pump-turbine runner is examined and optimized for increased pumping hydraulic efficiency using a response surface optimization methodology. The hydraulic pumping efficiency was found to have improved by 1.06% at the best efficiency point, while turbine hydraulic efficiency decreased by 0.70% at the turbine best efficiency point. The round-trip efficiency for the system was estimated to be about 78%, which is comparable to larger pumped-storage schemes currently in operation.

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Section: Introductionmentioning

confidence: 99%

Hydraulic design and optimization of a modular pump-turbine runner

Schleicher

Öztekin

2015

Energy Conversion and Management

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“…There exists another option which consists in using a wound rotor asynchronous machine with the rotor connected to the network through a frequency converter; in this case the size of the converter is a fraction of the unit rated power. This option, referred to as doubly fed induction generator (DFIG), has been extensively used in wind generation [10] and is the preferred option variable speed large-pumped storage units [11].…”

Section: Introductionmentioning

confidence: 99%

Dynamic response and governor tuning of a long penstock pumped-storage hydropower plant equipped with a pump-turbine and a doubly fed induction generator

Moreno

Pérez‐Díaz

Wilhelmi

et al. 2015

Energy Conversion and Management

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“…Sivakumar et al [7] introduced the variable speed technology for improving the power station performance and the existing conventional synchronous machines of the plant could be operated as variable speed machines by adopting static frequency converters. Results show that the variable speed technology has considerably increased the plant performance.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and dynamical analysis of pump-turbines in S-shaped regions during runaway operation

Zhang

Chen

et al. 2017

Energy Conversion and Management

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There is a region of pump-turbine operation, often called the S-shaped region, in which one unit rotational speed corresponds to three unit flows or torques. In this paper, the dynamic model of the pump-turbine in S-shaped regions is established by introducing the nonlinear piecewise function of relative parameters. Then, the global bifurcation diagrams of the pump-turbine are presented to analyze its dynamic characteristics in the S-shaped regions. Meanwhile, a stability criterion of runaway point is given based on the established theoretical model. The numerical experiments are conducted on the model and the results are in good agreement with

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Variable speed operation of reversible pump-turbines at Kadamparai pumped storage plant – A case study

Cited by 64 publications

References 21 publications

Hydraulic design and optimization of a modular pump-turbine runner

Hydraulic design and optimization of a modular pump-turbine runner

Dynamic response and governor tuning of a long penstock pumped-storage hydropower plant equipped with a pump-turbine and a doubly fed induction generator

Dynamic modeling and dynamical analysis of pump-turbines in S-shaped regions during runaway operation

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