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Recommendations towards the deployment of hydropower flexibility technologies

XFLEX HYDRO made seven key recommendations to policy makers

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incentives, flexibility
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Methodology for costing the XFLEX HYDRO technologies.

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Methodology and assumptions for evaluating the profitability of these technologies.

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Implications of ENTSO-E scenarios TYNDP 2022 on future electricity market behavior, reserve demand, and prices

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Technical White Paper

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Key words: flexibility solutions, KPIs, ASM
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Computation fluid dynamics investigation of the flow in junctions: application to hydraulic short circuit operating mode

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Stress-informed control of medium- and high-head hydropower plants to reduce penstock fatigue

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Key words: IMPC, simulation, penstock
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CFD and FEM analysis to migrate from fixed- to variable-speed on the Alto Lindoso HPP

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Key words: DFIM, FEM analysis
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Towards accurate vibration prediction of pump-turbine runners in deep partial load operation

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Key words: DPL operating points, FSI modelling, Finite Element analyses
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Contribution for the roadmap of hydraulic short circuit implementation: Case of Grand-Maison pumped storage power plant

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Numerical investigation of the structural behaviour of a headwater bifurcation in hydraulic short circuit

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Pushing the envelope of ancillary services with variable speed technology

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Key words: variable speed, DFIM
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Diagnostics of a hydraulic turbine failure

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Key words: Failure analysis, Diagnostics, thrust bearing damage
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CFD simulations of hydraulic short-circuits in junctions, application to the Grand'Maison power plant

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Water saving options in hydropower by means of variable speed operation: A prototype study in a mid-head Francis turbine

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Numerical fatigue damage analysis of a variable speed Francis pump-turbine during start-up in generating mode

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Key words: variable speed, FSFC, CFD/FEA simulations
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Towards accurate numerical fluid dynamics of pump-turbine runners in deep partial load operation

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Key words: CFD simulations, SST and SBES turbulence model,
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XFLEX HYDRO brand guidelines

Key words:
brand identity, flexibility, impact
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Assessments of hydropower plants start-up sequences and equivalent runner damage under transient operation

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Optimization of turbine start-up sequence of a full size frequency converter variable speed pump-turbine

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Artificial neural networks for predicting the onset of overload instability in Francis turbines

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Key words: Best Efficiency Point, Francis turbine, artificial intelligence techniques
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Determination of the natural frequencies of a prototype Kaplan turbine

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Key words: natural frequencies, Kaplan turbine
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Hybridization in Kaplan turbines. Wear and tear assessment

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Key words: Frequency containment reserve, hybrid mode
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Power plant transients including hydraulic short circuit operation mode

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Key words: power plant transients, hydraulic short circuit mode
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XFLEX HYDRO demonstrators grid services assessment and ancillary services matrix elaboration

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Inertia emulation contribution of Frades 2 variable speed pump-turbine to power network stability

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Flexibility, technologies and scenarios for hydropower report

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Key words: scenarios
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Site visit: Smart Power Plant Supervisor with integrated battery control

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Site visit, Vogelgrun, RoR
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XFLEX Hydro technology models’ documentation

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Key words: demonstrators, technologies
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Improving frequency containment reserve provision in run-of-river hydropower plants

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Distributed real-time model of the M3C for HIL systems using small-scale simulators

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Key words: Real-time systems , Matrix converters
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Strain prediction in Francis runners by means of stationary sensors

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Key words: Francis turbine, AI, linear regression models
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Increasing the operating range and energy production in Francis turbines by an early detection of the overload instability

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Performance assessment of linear models of hydropower plants

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Key words: linearization strategies, Taylor expansion
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Business use cases for the provision of flexibility services by hydropower

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Key words: KPI, business cases
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On the use of neural networks for dynamic stress prediction in Francis turbines by means of stationary sensors

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Optimal CAM Computation of Kaplan Turbines Accounting for Wear and Tear Originated by Frequency Control

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CFD simulations of a Y-junction for the implementation of hydraulic short-circuit operating mode

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Flexibility, technologies and scenarios for hydropower

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Key words: KPI Matrix, Future scenarios, flexibility needs
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Turbine mode start-up simulation of a FSFC variable speed pump-turbine prototype – Part I: 1D simulation

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Experimental facility for reduced scale model testing of hydraulic machines hybridized with a battery energy storage system

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Turbine mode start-up simulation of a variable speed Francis pump-turbine prototype – Part II: 3-D unsteady CFD and FEM

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Digitalization in hydropower generation: development and numerical validation of a model-based Smart Power Plant Supervisor

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Key words: SPPS, RoR, simulations
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Improved damage detection in Pelton turbines using optimized condition indicators and data-driven techniques

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Key words: Pelton turbine, vibration indicators
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Flexibility enhancements in pumped hydro storage power plants through variable speed drives

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Key words: Torque , Frequency conversion , Rotors
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Reduction of penstock fatigue in a medium-head hydropower plant providing primary frequency control

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Key words: Hydraulic transient, wear and tear, PFC
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Common methodology to assess cost of hydroelectric flexible technologies

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Key words: CAPEX, OPEX, costing, risk
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Recommendations towards the deployment of hydropower flexibility technologies

Key words:
incentives, flexibility
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The Hydropower Extending Power System Flexibility (XFLEX HYDRO) project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 857832.

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