Results 81 to 90 of about 437 (152)

Modernization of test room of pumping device of building machines

, 2008
The diploma thesis deals with the modernization of test equiptment for the testing of hydraulic rotary elements (hydrogenerators and hydraulic motors), which are designed to ground machines, followed by organizational innovation of workplace and ...
Klapal, Vítězslav
core   +2 more sources

Novel Self-Organizing Probability Maps Applied to Classification of Concurrent Partial Discharges from Online Hydro-Generators

Energies
In this paper, we present an unprecedented method based on Kohonen networks that is able to automatically recognize partial discharge (PD) classes from phase-resolved partial discharge (PRPD) diagrams with features of various simultaneous PD patterns ...
Rodrigo M. S. de Oliveira, Filipe C. Fernandes, Fabrício J. B. Barros   +2 more
doaj   +1 more source

Experiencias en el diagnostico del aislamiento de los generadores de potencia Experiences in the diagnosis of the insulation of power generators [PDF]

Revista Científica de Ingeniería Energética, 2012
El aislamiento de los generadores eléctricos de gran potencia (Turbogeneradores e Hidrogeneradores) es el componente que más influye en su confiabilidad operacional, por lo cual es vital conocer su estado para aplicar las acciones correctivas requeridas.
Julio Alberto Molé Menéndez, William José Torres Medina, Santiago AlfredoDorrbercker Drake   +2 more
doaj  

Proposals for reducing emergency stoppages of hydrogenerators at Ukraine hydro power plants

<p>Porada A.V., Shevchenko V.V. Proposals for reducing emergency stoppages of hydrogenerators at Ukraine hydro power plants. Proceedings of the XXII international scientific and practical conference "Information technologies: science, technology ...
Porada, A.V., Shevchenko, V.V.
core   +1 more source

A New Paradigm for Large Brushless Hydrogenerators : Advantages Beyond the Static System

, 2017
The grid code, FIKS, from the Norwegian transmission system operator (TSO), Statnett, states that synchronous generators > 25MVA, must have a static excitation system. However, an improved brushless excitation system is in operation on some commercial
Nøland, Jonas Kristiansen
core   +2 more sources

Development and implementation of promising methods and model engineering during the design and operation of powerful turbogenerators and hydrogenerators

, 2018
Вперше в Україні (не має аналогів) на світовому рівні з використанням розробленої методики проведено розрахункові дослідження з проектування й моделювання потужних турбо- та гідрогенераторів. Це дозволило створити енергетичні установки нового покоління з
Третяк, Олексій Володимирович, Кобзар, Костянтин Олександрович, Полієнко, Владислав Русланович, Гакал, Павло Григорович, Шуть, Олександр Юрійович, П'ятницька, Євгенія Святославівна   +5 more
core  

Computer Simulation of Partial Discharges in Voids inside Epoxy Resins Using Three-Capacitance and Analytical Models. [PDF]

Polymers (Basel), 2020
Rodríguez-Serna JM, Albarracín-Sánchez R, Dong M, Ren M.   +3 more
europepmc   +1 more source

Novel partial discharge monitoring method based on electromagnetic testing for hydrogenerators

四川大学学报. 自然科学版
Partial discharge （PD） monitoring is a well-established technique for diagnosing insulation faults in generator stator windings.However， traditional pulse current monitoring methods， which rely on capacitive sensors to capture PD signals， face several ...
WANG Hai-Ping, WANG Guo-Li, YANG Dong, SONG Kun-Long, GUO De-Ming, LIU Yun-Ping, HUANG Ze, WANG Ji-Qian   +7 more
doaj  

Experimental Study of an Evaporative Cooling System in a Rotating Vertical Channel with a Circular Cross-Section for Large Hydro-Generators

Energies
With the evolution of hydroelectric generators toward larger capacity and higher rotational speeds, the significa++nt increase in power density has rendered rotor cooling technology a critical bottleneck restricting performance enhancement.
Ruiwei Li, Lin Ruan
doaj   +1 more source

A theoretical and practical approach for underexcitation protection and control studies of hydrogenerators in a real-time environment.

, 2018
–The installation and settings of protection devices and excitation control systems require experience since a failure can cause damage to the synchronous generator and negative impact on the power grid.
Coelho, Aurélio Luiz Magalhães, Pereira Filho, Clever Sebastião, Silveira, Paulo Márcio da, Baracho, Francisco Ricardo Abrantes Couy   +3 more
core   +1 more source