Buscar
Mostrando ítems 41-50 de 623
Filtro para ensaio de descargas parciais em transformadores de potência
(Universidade Tecnológica Federal do ParanáCornelio ProcopioBrasilTecnologia em Automação IndustrialUTFPR, 2017-12-15)
This work aims at the development and implementation of an active filter to limit the cutoff frequency for performing the measurement of partial discharges in power transformers in accordance with the requirements of ...
Reliability evaluation of power transformers using partial discharge testing and measurement of low molecular mass acids in insulating oil
(2014-11-10)
The transformer is a fundamental part in electrical power systems. This equipment represents high cost and requires greater attention during maintenance activities. To avoid interruptions, it is important to evaluate the ...
A review of the expericence in testing of high voltage generators.
(CIGRE, 1997)
The convenience of testing the high voltage machine insulation is well known. Test methods used in our country for determining the state of degradation of the insulation are presented with results gathered during three ...
Análise de medidas ultrassônicas de descargas parciais em sistema ponta-plano por meio da tranformada hilbert-huang e de redes neurais de Regressão generalizada
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2023-02-15)
The electric power system comprises generation, transmission and distribution systems. To
ensure the operation of this complex system, it is crutial to verify the operation condition of the
involved components. Thus, the ...
Determination of pollution loads in spillways of the combined sewage network of the city of Cuenca, Ecuador
(2020)
Combined sewer overflow (CSO) is one of the main causes of contamination in receiving bodies during the rainy period. The objective of this research was to evaluate the behavior of three combined sewage discharges into the ...
New diagnostic techniques for large utility generators
(IEEE, 1998)
For many years the diagnostic techniques used for the assessment of the insulation condition of high voltage generators was based on the determination of several traditional dielectric parameters. The detection of partial ...
Localização de descargas parciais em transformadores de potência por meio de sensores piezelétricos de baixo custo e sistemas inteligentes
(Universidade Estadual Paulista (UNESP), 2016)