Interferência de harmônicas em equipamentos de medição de energia elétrica. / Harmonic interference in equipment for measurement of eletrical energy.
AUTOR(ES)
José Eduardo Rodrigues
DATA DE PUBLICAÇÃO
2009
RESUMO
This work addresses the reliability of energy meters in nonsinusoidal systems, looking for the increase of quality in the electric energy billing. To that purpose, it focuses on a fairer metering and a better relationship between the concessionaire and consumer. The tests were carried through in the laboratories of Eletropaulo, of the Electro-Technology and Energy Institute in the University of São Paulo, and in the Laboratory of the Center of Studies in Power Quality Regulation (Enerq), USP. This study is part of a bigger project in Research and Development of the Electric Energy National Agency (Aneel). Its objective was to investigate whether the distortion of voltage and current in the electric energy billing meters had deviations in the metered energy. It was also intended to evaluate whether the inserted harmonics in the electromechanical meters have greater or minor deviation in the metered energy, in comparison to the electronic meters. The methodology used included a survey of studies, research and development of the electric sector, besides laboratory tests with two national equipment samples. As parameters for the tests, wave were formulated by means of real load metering. The results of the metering obtained in real situations were compared with those collected in the laboratories. The results of the laboratory tests were analyzed and compared with the limits established in the norms in force, amongst which one highlights: the Technical Metrological Regulation from Inmetro and the Electric Power Distribution Procedures in the National Electric System Prodist. The present study concluded the instruments analyzed under normalized conditions, when parameterized to not consider the distortion power in the calculation of reactive, meet the 60Hz frequency, within the accuracy parameters. These data are valid both for the VArh functions and the Wh.
ASSUNTO(S)
energia elétrica (qualidade) harmonics power quality metering equipment equipamentos de medidas elétricas
Documentos Relacionados
- Prioritization of investments for eletrical energy distribution system
- The effects of the rationing of electric power happened in Brazil in 2001 and 2002 with emphasis in the electric energy.
- Alternative system of electric energy payment ? ?A national option of low cost equipment"
- Avaliação da carga mental de trabalho dos operadores dos centros de operação e controle de energia elétrica.
- Avaliação de distúrbios em sistemas de distribuição de energia elétrica devido às distorções harmônicas