Simultaneous transient operation of a high head hydro power plant and a storage pumping station in the same hydraulic scheme

Bucur, Diana Maria; Dunca, Georgiana; Cervantes, Michel; Călinoiu, Constantin; Isbasoiu, Eliza Consuela

doi:10.1088/1755-1315/22/4/042015

Cited by 8 publications

(4 citation statements)

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“…The selected case study is the Gâlceag hydropower facility [7][8][9][10][11][12] on Sebeș River, located in the west-central part of Romania. It consists of the following components ( Figure 1): …”

Section: Case Study Descriptionmentioning

confidence: 99%

EPANET Modelling of a High Head Pumped-Storage Hydropower Facility

et al. 2018

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Abstract:A complex hydraulic facility is modelled in EPANET. The system consists in an underground high head Hydro Power Plant (HPP) and a Pumping Station (PS), operating in a pumped-storage hydropower scheme with three reservoirs. The complexity of the system is due to its unusual configuration, where the PS discharges the water directly into the HPP penstock. The PS is equipped with 2 × 10 MW pumps. The HPP is equipped with 2 × 75 MW Francis turbines. The simulations allow assessing the energy production and/or consumption in various scenarios, offering a tool to decision makers, to wittingly choose the operation mode of the facility.

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Section: Case Study Descriptionmentioning

confidence: 99%

EPANET Modelling of a High Head Pumped-Storage Hydropower Facility

et al. 2018

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“…Hydropower remains the most important renewable source for electrical power generation worldwide, providing one‐fifth of the world's electricity supply . Hydropower is able to back‐up the integration of renewable energy and contribute to the continuity of energy supply and grid stabilization owing to immediate response to varying loads and demands . Kaplan turbines operate efficiently on sites with low heads and relatively high flow rates.…”

Section: Introductionmentioning

confidence: 99%

“…1 Hydropower is able to back-up the integration of renewable energy and contribute to the continuity of energy supply 2 and grid stabilization owing to immediate response to varying loads and demands. 3 Kaplan turbines operate efficiently on sites with low heads and relatively high flow rates. The vane opening and runner blade setting are adjusted separately to provide a wide flow range and a flat efficiency curve.…”

Section: Introductionmentioning

confidence: 99%

Simulation of steady and unsteady flows through a small‐size Kaplan turbine

Ghenaiet

Bakour

2020

Engineering Reports

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The increasing demand for electric energy has pushed to rely on the microhydropower as one of the most cost‐effective technologies to improve the grid stability in rural localities. This article investigates the steady and unsteady flows in a complete small Kaplan turbine by means of the solver ANSYS‐CFX. Examination of the basic design parameters in terms of blade setting, vane opening, and interdistance has revealed the best operating parameters and the potentiality of performance improvement. Moreover, the Fast Fourier Transform of static pressure fluctuations recorded at different monitor points allowed analyzing the flow unsteadiness arising from the stator‐rotor interactions (RSI). The prevailing harmonics coinciding with the modes of RSI were determined and compared with the analytically predicted main diametrical modes and frequencies of the pressure waves. The found results in this category of low‐head small Kaplan turbine may serve in developing similar hydroturbines suitable for the microhydropower.

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“…Given their flexibility, dimensions and ability to quickly increase or decrease the power output, hydropower plants are able to respond immediately to system disturbances and fast varying loads and demands while maintaining a high efficiency (Bucur et al, 2014). This translates into numerous starts or stops, frequent transient and off-design operations and the need for wider operating ranges for hydraulic turbines.…”

Section: Introductionmentioning

confidence: 99%

Study on the Accuracy of RANS Modelling of the Turbulent Flow Developed in a Kaplan Turbine Operated at BEP. Part 2 - Pressure Fluctuations

Iovănel

Dunca

Cervantes

2019

JAFM

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The aim of the paper is to investigate the limitations of unsteady Reynolds-averaged Navier-Stokes (RANS) simulations of the flow in an axial turbine. The study is focused on modelling the pressure pulsations monitored on the runner blades. The scanned blade geometry renders the meshing process more difficult. As the pressure monitor points are defined on the blade surface the simulation relies on the wall functions to capture the flow and the pressure oscillations. In addition to the classical turbulence models, a curvature correction model is evaluated aiming to better capture the rotating flow near curved, concave wall boundaries. Given the limitations of Reynolds-averaged Navier-Stokes models to predict pressure fluctuations, the Scale Adaptive Simulation-Shear Stress Transport (SAS-SST) turbulence model is employed as well. The considered test case is the Porjus U9, a Kaplan turbine model, for which pressure measurements are available in the rotating and stationary frames of reference. The simulations are validated against time-dependent experimental data. Despite the frequencies of the pressure fluctuations recorded on the runner blades being accurately captured, the amplitudes are considerably underestimated. All turbulence models estimate the correct mean wall pressure recovery coefficient in the upper part of the draft tube.

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Simultaneous transient operation of a high head hydro power plant and a storage pumping station in the same hydraulic scheme

Cited by 8 publications

References 1 publication

EPANET Modelling of a High Head Pumped-Storage Hydropower Facility

EPANET Modelling of a High Head Pumped-Storage Hydropower Facility

Simulation of steady and unsteady flows through a small‐size Kaplan turbine

Study on the Accuracy of RANS Modelling of the Turbulent Flow Developed in a Kaplan Turbine Operated at BEP. Part 2 - Pressure Fluctuations

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