Results 31 to 40 of about 1,744 (183)
Analysis of causes of turbogenerators and hydrogenerators damages by the method of determination of complicated stressed state of the parts [PDF]
, 2016 Виконано аналіз можливих причин виникнення аварійних ситуацій у процесі експлуатації турбогенераторів та гідрогенераторів при різноманітних режимах роботи.
Кобзар, Костянтин Олександрович +4 more
core +1 more source
Nonlinear Vibration Analysis of Rotor considering Cogging and Harmonic Effects
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 This paper aims to investigate nonlinear vibration characteristics of rotor system considering cogging and harmonic effects. Firstly, relative permeance with eccentric was established and then corrected by correction factor caused by the cogging effect.
Shanle Li +5 more
wiley +1 more source
Analytical review of underground equipment of water impact operation for well development
RUDN Journal of Engineering Research, 2021 Rational indicators for the development of oil and gas fields are related to the systemic maintenance of a given level of perfection of formation opening in bottomhole zones of producing or injection wells.
Eugeny S. Yushin
doaj +1 more source
Improved hydrogenerator field winding thermal monitoring
Thermal Science, 2023 A new monitoring method for determination of average hydrogenerator field winding temperature is introduced in order to increase the robustness of the temperature measurement system using the classic U-I method. The classic approach is prone to error due to brush voltage drop, especially when field voltage is low.
Ilija Klasnic +2 more
openaire +1 more source
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 This paper investigates the effect of the field winding interturn short‐circuit (FWISC) position on the rotor vibration properties in turbo generators. Different from the previous studies which focused on the influence of the short‐circuit degree, this work pays much attention to the impact of the short‐circuit position on the rotor unbalanced magnetic
Xing-Hua Yuan +6 more
wiley +1 more source
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 Aiming at the problem that the vibration signals of the hydrogenerator unit are nonlinear and nonstationary and it is difficult to extract the signal features due to strong background noise and complex electromagnetic interference, this paper proposes a dual noise reduction method based on intrinsic time‐scale decomposition (ITD) and permutation ...
Yan Ren +6 more
wiley +1 more source
Tekhnichna Elektrodynamika, 2023 A capacitive sensor for measuring the air gap between the boring of the stator core and the poles of the rotor in a powerful hydrogenerator is proposed and investigated.
А.S. Levitskyi +2 more
semanticscholar +1 more source
Reduced model for control in a hydroelectric unit at off-design operation [PDF]
, 2016 International audienceThis paper describes the development of a reduced-order linear mathematical model of a hydroelectric unit subject to pressure perturbations in the draft tube of the hydraulic turbine, as it is the case at off-design operation ...
Canudas de Wit, Carlos +3 more
core +4 more sources
An emigration genetic algorithm and its application to multiobjective optimal designs of electromagnetic devices [PDF]
, 2014 Author name used in this publication: S. L.
Ho, SL, Liu, ZJ, Ni, G, Wang, Y, Yang, S
core +1 more source
Energies, 2021 In this paper, a novel image denoising algorithm and novel input features are proposed. The algorithm is applied to phase-resolved partial discharge (PRPD) diagrams with a single dominant partial discharge (PD) source, preparing them for automatic ...
Ramon C. F. Araújo +3 more
doaj +1 more source