Reliability of electrical and hydraulic pitch systems in wind turbines based on field-data analysis
Energy Reports, 2023 The pitch system is notably one of the critical subsystems of a wind turbine, supporting its effective control towards maximising wind capture and at the same time protecting its integrity in cases of excessive loads.
Julia Walgern +3 more
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Energies, 2022 Based on the energy storage type of hydraulic wind turbines (HWTs) and in view of the unit frequency drop problem under high wind power proportion conditions, this paper proposes a method of primary frequency control under maximum power point tracking ...
Lijuan Chen +6 more
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On the Evaluation of Mesh Resolution for Large-Eddy Simulation of Internal Flows Using Openfoam
Fluids, 2021 The central aim of this paper is to use OpenFOAM for the assessment of mesh resolution requirements for large-eddy simulation (LES) of flows similar to the ones which occur inside the draft-tube of hydraulic turbines at off-design operating conditions ...
Zahra Seifollahi Moghadam +2 more
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Scenarios for refurbishment of a hydropower plant equipped with Francis turbines
Renewable Energy and Environmental Sustainability, 2016 The energy market imposes new requirements in hydraulic turbines operation. Usually, the old hydraulic turbines are not designed to meet these new requirements.
Muntean Sebastian +5 more
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Numerical Simulation of a Kaplan Prototype during Speed-No-Load Operation
Energies, 2022 Hydropower plants often work in off-design conditions to regulate the power grid frequency. Frequent transient operation of hydraulic turbines leads to premature failure, fatigue and damage to the turbine components.
Raluca Gabriela Iovănel +2 more
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Research and development of a gravitational water vortex micro-HPP in the conditions of Kyrgyzstan
Energy Reports, 2023 The field of research in this article is small-capacity hydropower conversion plants. The object of the study is the turbines of low-pressure micro hydro power plants ( micro HPP) that convert the energy of velocity head into electrical energy.
Alaibek Obozov +5 more
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Generator of microelectric power plants for low-potential watercourses [PDF]
Омский научный вестник, 2022 The development of autonomous power supply systems based on micro-hydroelectric power plants using the energy of small watercourses is associated with the fulfillment of a number of contradictory requirements.
R. N. Khamitov +4 more
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Power Swing Generated in Francis Turbines by Part Load and Overload Instabilities
Energies, 2017 Hydropower plays a key role in the actual energy market due to its fast response and regulation capacity. In that way, hydraulic turbines are increasingly demanded to work at off-design conditions, where complex flow patterns and cavitation appear ...
David Valentín +5 more
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Control design, implementation, and evaluation for an in-field 500 kW wind turbine with a fixed-displacement hydraulic drivetrain [PDF]
Wind Energy Science, 2018 The business case for compact hydraulic wind turbine drivetrains is becoming ever stronger, as offshore wind turbines are getting larger in terms of size and power output. Hydraulic transmissions are generally employed in high-load systems and form an
S. P. Mulders +2 more
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ESRC guide vanes of hydraulic turbine for Three Gorges project [PDF]
China Foundry, 2005 The mechanical properties and internal quality of low carbon martensite Electroslag Remelting Casting (ESRC)stainless steel castings are superior to that of sand casting ones.
Rui CHEN, Xudong LI, Junqing WANG
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