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高电压技术 2011年第11期37卷 2772-2779页

作者： Orsino Oliveira Filho José Antonio Cardoso Darcy Ramalho de Mello Rogério Magalhes de Azevedo Sylvia G Carvalho Cepel-Electric Energy Research Center Zip Code 21941-911 Rio de JaneiroRJBrazil eletrobras furnas-Centrais Eletricas S/A Zip Code 22283-900 Rio de Janeiro RJBrazil

Studies based on AC high voltage tests have been done at Cepel to investigate the performance of 800 kV busbar insulators under heavy wetting *** were tested which are now used on site and also with different configurations of booster *** recorded by ultra-violet(UV) camera were used to help the investigations on the effectiveness of booster *** comparing UV images of the insulator being stressed with high voltage under heavy artificial rain,with and without booster sheds,it was possible to observe how significant the reduction on the flashover formation process was when booster sheds were *** effectiveness of booster sheds was also quantified by determining the disruptive discharge of the insulator with and without *** results of these studies can also be considered as contribution to national and international standard technical committees to improving the standardized procedure for tests on ultra high voltage(UHV) insulators under heavy *** such as the clear definition of relevant UHV test procedure and test arrangements,including the use of UV camera,have to be taken into account.

关键词： UHV insulator heavy rain booster sheds wet tests disruptive discharge ultra-violet images

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Geoprocessing Applied in the Estimate of Infiltration and Surface Runoff in HPP’s Contribution Watershed

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Journal of Geographic Information System 2021年第6期13卷 643-659页

作者： Elizon Dias Nunes Patrícia De Araújo Romão Maurício Martines Sales Marta Pereira Da Luz Institute of Socio-Environmental Studies Federal University of Goiás Goiania Brazil School of Civil and Environmental Engineering Federal University of Goiás Goiania Brazil eletrobras furnas Aparecida de Goiania Brazil Polytechnic School Pontifical Catholic University of Goiás Goiania Brazil

The knowledge of the hydrological regime contributes to the prediction of periods of higher or lower water supply as a function of the frequency and volume of rainfall in relation to the pedological, land cover, and land use conditions. This work aims at evaluating the spatio-temporal variability of the infiltration and runoff potential of an area formed by 4 sub-basins tributary to the São Marcos River in Cristalina (GO). The SCS/NRCS-USDA (2004) method was used, using geoprocessing resources, considering soils in dry, semi-humid and humid conditions. The estimates indicate that rainfall with an average of 6.83 mm, in the September-October transition, in the face of soils in the dry condition does not provide surface runoff. Thus, the variability of pedological characteristics associated with the various conditions of coverage and land use indicates that even the areas with lower infiltration potential begin to contribute effectively with their respective channels in the transition from October to November, when rainfall events are more frequent and significant, and the soils are already in conditions of greater humidity.

关键词： Rainfall Height Runoff Coefficient Hydrological Behavior

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Safety of Dams： A Pathological Approach of Qualitative and Quantitative Risks

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Journal of Civil Engineering and Architecture 2016年第9期10卷 1032-1051页

作者： Flavio Augusto Settimi Sohler Laura Maria Mello Saraiva Caldeira National Civil Engineering Laboratory--LNEC Eletroras Furnas Aparecida de Goidnia 74923-650 Brazil National Council of Scientific Research-CNPq Brasilia 71605-001 Brazil National Civil Engineering Laboratory-LNEC Geoteehnies Department Lisbon 1700-066 Portugal

Dams are critical and essential elements in any infrastructure and, in front of accidents occurred in many countries, it is extremely important to know the risk of these structures. Inserted in this context, it was found in the technical literature, methods and tools capable of measuring the exposure value by means of indicators. In the study, the highlights were 12 methods of qualitative, semiquantitative and quantitative risk analysis, representing an overview of risk analysis methods available in the literature with potential use in dams, that it has been done into electronic spreadsheets. The case study is performed on a sample of concrete dam and earth/rockfill built and operated by Eletrobr^s furnas Company, supported by documentary research, projects, field inspections and interviews with experts. After applying the methods and the analysis thereof, has been prepared the eletrobras Fumas dam risk analysis method which is characterized by adapting the criteria analyzed to the reality of the company＇s dams and it was also performed the portfolio risk analysis of 18 dams. In spite of the variety and subjectivity of qualitative and semiquantitative methods, the results show that they tend to converge on the analysis of dam based on risk. The application methodology demonstrates the feasibility assessment stage, covering the preliminary analysis for portfolio dams, followed by formal and individual risk analyzes for the most critical structures. These results confirm the applicability of risk analysis techniques, contributing to the consolidation of this toot as fundamental in the dam safety.

关键词： Dam safety dams breaks methods and tools for risk analysis risk analysis in dam portfolio.

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