Results 51 to 60 of about 550 (166)
Electronics Letters, Volume 62, Issue 1, January/December 2026.With a large‐scale 34‐MW integer‐slot tubular hydrogenerator as an example, static and transient field models are established and solved in this paper to reveal the influence laws of two key geometric structures, skewed stator slots and shifted poles, on synchronous reactance, damper bar losses, and no‐load voltage waveforms.
Wen‐han Li +4 more
wiley +1 more source
Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators
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 +1 more source
Journal of Hebei University of Science and Technology, 2021 In order to avoid the fault caused by over high temperature of the stator and ensure the normal performance of the hydro-generator,a temperature field distribution model of the hydro-generator was established,and a temperature prediction method was ...
Yong1 LI +4 more
doaj +1 more source
IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.This study comparatively assesses lightning‐overvoltage propagation to the transformer high‐voltage terminal and hydrogenerator busbar of a hydropower plant under prescribed lightning‐current injection and selected nonideal conditions of a station‐side metal‐oxide arrester.
Jiachen Zhang +9 more
wiley +1 more source
Experimental Aspects in the Vibration-Based Condition Monitoring of Large Hydrogenerators
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 +1 more source
IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.By studying the electromagnetic force law of the stator tooth wall and the key points of the stator tooth tip under different loadings, the key parts of the stator tooth wall subjected to the electromagnetic force shock are found out. What's more, the force change law of the damping strip is obtained through analysing the force of the damping tooth ...
Dajun Tao +4 more
wiley +1 more source
Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator [PDF]
, 2017 This paper investigates the influence of converter-fed operation on magnetic forces and radial vibration in a hydrogenerator. Flux density distribution is computed using time-stepping finite element (FE) analysis and used to calculate force density ...
Roy Nilsen +9 more
core +1 more source
Commissioning tests of the first hydro-generator of the Bajo de Mina HPP (Panama) [PDF]
E3S Web of Conferences, 2020 A mathematical model has been developed for calculating the distribution of azimuthal velocities and the shape of the free surface of oil in the compartments of an oil bath of a hydro-generator. The mathematical model of oil flow is verified by comparing
Zuikov Andrey
doaj +1 more source
Condition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurements [PDF]
, 2018 This paper presents results from laboratory measurements of partial discharge (PD) activity in 50 cm long samples cut from the mainwall section of old hydrogenerator stator bars.
Aakre, Torstein Grav +5 more
core +1 more source
International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.This study proposed a modified passive islanding technique that combines over/under frequency (OUF), rate of change of frequency (ROCOF), rate of change of phase angle difference (ROCPAD), and rate of change of voltage (ROCOV) for sensing of islanding and nonislanding conditions.
Bemdoo Saka +4 more
wiley +1 more source