Results 61 to 70 of about 142 (118)

Effects of Al/NiCr Coatings on the Current-Carrying Tribological Performance of Hydrogenerator Collector Rings [PDF]

Cailiao Baohu
In order to improve the surface condition of collector rings in hydrogenerators and to enhance the current-carrying characteristics and operational stability of the brush/ring tribo-pair，Al and NiCr coatings were deposited on the surface of 45 steel，a ...
ZHAO Xinze, LI Wanting, LI Chenshi, ZHU Yunlong, LI Yang, ZHAO Meiyun, XU Xiang, YANG Wei
doaj   +1 more source

A Compact IIoT System for Remote Monitoring and Control of a Micro Hydropower Plant. [PDF]

Sensors (Basel), 2023
Albița A, Selișteanu D.
europepmc   +1 more source

Experimental Estimation of Journal Bearing Stiffness for Damage Detection in Large Hydrogenerators

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, Roberto Dalledone Machado, Anselmo Chaves Neto   +2 more
doaj   +1 more source

Pendulum-Based River Current Energy Converter for Hydrometric Monitoring Systems. [PDF]

Sensors (Basel), 2022
Naifar S, Grimmeisen F, Viehweger C, Hu Z, Bauer A, Hörschelmann P, Kanoun O.   +6 more
europepmc   +1 more source

Inspection and preventive maintenance optimization of electrographite brushes for a hydrogenerator unit in the Brazilian interconnected power system

Results in Engineering
The possibility of shutdown due to the wearing of carbon-brush collectors is a major concern on turbine-generators and one of the most frequent motives for preventive maintenance.
Gisele Maria de Oliveira Salles, Yago Lafourcade Baracy, Lucas Fritzen Venturini, Gabriela Rosalee Weigert-Dalagnol, Raphael Augusto de Souza Benedito, Diego Issicaba   +5 more
doaj   +1 more source

A new regularization method for dynamic load identification. [PDF]

Sci Prog, 2020
Wang L, Huang Y, Xie Y, Du Y.
europepmc   +1 more source

Forecast Model Update Based on a Real-Time Data Processing Lambda Architecture for Estimating Partial Discharges in Hydrogenerator. [PDF]

Sensors (Basel), 2020
Pereira FH, Bezerra FE, Oliva D, Souza GFM, Chabu IE, Santos JC, Junior SN, Nabeta SI.   +7 more
europepmc   +1 more source

A System Based on Artificial Neural Networks for Automatic Classification of Hydro-generator Stator Windings Partial Discharges

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Partial discharge (PD) monitoring is widely used in rotating machines to evaluate the condition of stator winding insulation, but its practice on a large scale requires the development of intelligent systems that automatically process these measurement ...
Rodrigo M. S. de Oliveira, Ramon C. F. Araújo, Fabrício J. B. Barros, Adriano Paranhos Segundo, Ronaldo F. Zampolo, Wellington Fonseca, Victor Dmitriev, Fernando S. Brasil   +7 more
doaj   +1 more source

Study on Determining the Efficiency of a High-Power Hydrogenerator Using the Calorimetric Method

Energies
The global energy crisis demands efficient electricity production solutions, especially for isolated communities where hydraulic energy can be harnessed sustainably. This paper presents a case study analyzing the efficiency of a 13,330 kW hydrogenerator,
Elisabeta Spunei, Dorian Anghel, Gheorghe Liuba, Cristian Paul Chioncel, Mihaela Martin   +4 more
doaj   +1 more source

Analysis and Comparison of Sensors for Measurements of Partial Discharges in Hydrogenerator Stator Windings

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In order to measure electrical signals produced by partial discharges in hydrogenerators stator windings, capacitive couplers are regularly used. They are electrically connected to the windings and therefore, require undesired insulation intrusion.
Victor Dmitriev, Rodrigo M. S. de Oliveira, Fernando S. Brasil, Paulo R. M. de Vilhena, Jonathas F. M. Modesto, Ronaldo F. Zampolo   +5 more
doaj   +1 more source