Results 11 to 20 of about 142 (118)

Analysis of Contact Characteristics of Carbon Brush/Slip Ring under Eccentric Oscillation of Hydrogenerator Rotor

Shock and Vibration, 2021
In this paper, the contact characteristics of the carbon brush/slip ring of the hydrogenerator under the eccentric vibration of the rotor are studied.
Xinze Zhao, Yunfeng Nie, Ming Chen, Hongling Qin, Xiang Xu   +4 more
doaj   +2 more sources

Influence of stator and rotor core material definition method on no‐load electromagnetic field calculation results for tubular hydrogenerator

Electronics Letters
In this letter, the effects of various material definition approaches for stator and rotor cores on the no‐load electromagnetic field calculations of a 34 MW tubular hydrogenerator are investigated, utilizing the transient motion electromagnetic field ...
Jia‐xin Man, Zhi‐ting Zhou, Zhen‐nan Fan   +2 more
doaj   +2 more sources

Influence of the Electromagnetic Field Model on the Calculated No‐Load Magnetic Field of Tubular Hydro Generators

IET Electric Power Applications
The selected electromagnetic field model of a hydro generator directly affects the calculation of the no‐load magnetic field, which in turn affects the grid‐connected power quality of the hydrogenerator and the power transmission safety.
Qi‐Rui Yin, Zhi‐Ting Zhou, Zhen‐Nan Fan, Yong Yang, Jing‐Can Li   +4 more
doaj   +2 more sources

Study on the suppression effect of variable hydrogen parameters on the temperature rise of the turbo‐generator rotor under deep peak regulation

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

Synchronization and Optimal Operation of a 140 kVA Inverter in On‐Grid Mode Using Mamdani Controllers in Cascade

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, Victor Herrera-Perez, Javier Gavilanes, Andrés Morocho, Jorge Hernandez-Ambato, Ton D. Do   +5 more
wiley   +1 more source

Research on Multiobjective Optimal Operation Strategy for Wind‐Photovoltaic‐Hydro Complementary Power System

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, Chenxi Wan, Wanqing Zuo, Kefei Zhang, Xinyi Shu, Daniel T. Cotfas   +5 more
wiley   +1 more source

Performance of Various Voltage Stability Indices in a Stochastic Multiobjective Optimal Power Flow Using Mayfly Algorithm

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, Christopher Maina Muriithi, George Nyauma Nyakoe, Yang Li   +3 more
wiley   +1 more source

Rotor loss and temperature variation under single and combined faults composed of static air‐gap eccentricity and rotor inter‐turn short circuit in synchronous generators

IET Electric Power Applications, Volume 15, Issue 11, Page 1529-1546, November 2021., 2021
Abstract In this study, the rotor loss as well as the temperature variations due to the static air‐gap eccentricity (SAGE) and the rotor inter‐turn short circuit (RISC) in synchronous generators is presented. Different from the previous studies, this study investigates the loss/temperature changes under not only the single SAGE fault and the single ...
Yu‐Ling He, Wen Zhang, Ming‐Xing Xu, Wen‐Qiang Tao, Hui‐Lan Liu, Long‐Jiang Dou, Shu‐Ting Wan, Jun‐Qing Li, David Gerada   +8 more
wiley   +1 more source

Synchronous machine performance under geomagnetic disturbances

High Voltage, Volume 6, Issue 5, Page 894-903, October 2021., 2021
Abstract Geomagnetic disturbances (GMDs) are known to disturb power system equipment performance. The danger is associated with geomagnetically induced currents (GICs) occurring at the Earth's surface during GMD. GICs do not endanger power system operation conditions by themselves.
Ilja Boguslawsky, Nikolay Korovkin, Victor Popov, Olga Sokolova   +3 more
wiley   +1 more source

Detection of shorted turns on rotor poles in hydrogenerators using artificial neural networks [PDF]

Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2014
Early diagnosis of faults that might occur in industrial processes makes it possible to perform important preventative actions and therefore avoid the heavy economic losses involved in production stoppages and the replacement of elements and parts.
Babić Blagoje, Kartalović Nenad, Žigić Aleksandar, Cakić Nikola, Milosavljević Srđan   +4 more
doaj   +1 more source