Results 11 to 20 of about 437 (152)
Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators [PDF]
International Journal of Rotating Machinery, 2017 Based on experimental evidence collected in a set of twenty 700 MW hydrogenerators, this article shows that the operating conditions of large hydrogenerators journal bearings may have unpredictable and significant changes, without apparent reasons. These
Geraldo Carvalho Brito Junior +2 more
doaj +2 more sources
Experimental Estimation of Journal Bearing Stiffness for Damage Detection in Large Hydrogenerators [PDF]
Shock and Vibration, 2017 Based on experimental pieces of evidence collected in a set of twenty healthy large hydrogenerators, this article shows that the operating conditions of the tilting pad journal bearings of these machines may have unpredictable and significant changes ...
Geraldo Carvalho Brito +2 more
doaj +2 more sources
Experimental Aspects in the Vibration-Based Condition Monitoring of Large Hydrogenerators [PDF]
International Journal of Rotating Machinery, 2017 Based on experimental observations on a set of twenty 700 MW hydrogenerators, compiled from several technical reports issued over the last three decades and collected from the reprocessing of the vibration signals recorded during the last commissioning ...
Geraldo Carvalho Brito Junior +3 more
doaj +2 more sources
The Choice of a Rational Technology for Manufacturing the Hydrogenerators-Motors Rotor Rim
Journal of Mechanical Engineering, 2023 The object of research in the paper is the technology of manufacturing segments of the rotor rim of large hydrogenerators-motors. The subject of study is the design and geometrical state of the rotor rim during the operation of hydraulic units.
Pavlo M. Makarov
doaj +2 more sources
Analysis of Partial Discharge Activity for Evaluation of the State of High Power Electric Generators Stator Windings [PDF]
Problems of the Regional Energetics, 2016 The paper shows the importance of trending of partial discharge activity in assessing the insulation condition. It is presented the principle of the measurement method and the quantities that characterize partial discharges and also the criteria utilized
Dumitrescu Sorin
doaj +2 more sources
Loss Modeling of Large Hydrogenerators for Cost Estimation of Reactive Power Services and Identification of Optimal Operation [PDF]
, 2022 As a result of the worldwide energy transition, reactive power generation has started to become a more scarce resource in the power grid. Until recently, reactive power has been an auxiliary grid service that classical power generation facilities have ...
Nøland, Jonas Kristiansen +7 more
core +2 more sources
IET Electric Power Applications, Volume 17, Issue 12, Page 1524-1534, December 2023., 2023 The temperature characteristics of gap‐pickup diagonal‐flow turbo‐generator rotor is obtained, and the suppression law of hydrogen temperature and pressure on rotor temperature is summarised. Abstract In recent years, the extensive participation of turbine generator in deep peak regulation has caused significant damage to the rotor windings, which is ...
Yucai Wu, Yingjie Guo
wiley +1 more source
Journal of Electrical and Computer Engineering, Volume 2023, Issue 1, 2023., 2023 This paper addresses the synchronization and operation of a 140 kVA inverter system connected to the main grid as part of a decentralized microgeneration system. The considerations for the supply of electrical energy stored in battery banks, mostly of photovoltaic origin, involve a study of the details of a rigid nonlinear system, which parallels the ...
Jesús Rodríguez-Flores +5 more
wiley +1 more source
International Journal of Photoenergy, Volume 2022, Issue 1, 2022., 2022 To address the problems of wind and solar generation volatility and lose of wind and photovoltaic resources, on the basis of the complementary property of wind‐solar‐water, the topology structure of the wind‐solar‐water synergy power generation system is constructed. Taking the minimum grid fluctuation index, the minimum wind‐photovoltaic‐hydro discard
Guo Zhao +5 more
wiley +1 more source
Journal of Electrical and Computer Engineering, Volume 2022, Issue 1, 2022., 2022 The performance of voltage stability indices in the multiobjective optimal power flow of modern power systems is presented in this work. Six indices: the Voltage Collapse Proximity Index (VCPI), Line Voltage Stability Index (LVSI), Line Stability Index (Lmn), Fast Voltage Stability Index (FVSI), Line Stability Factor (LQP), and Novel Line Stability ...
Rebeccah Kyomugisha +3 more
wiley +1 more source