Análise das perturbações de qualidade de energia em sistemas de distribuição e a adequação as tendências regulatórias do PRODIST

The public consultation n° 018/2014, for review the Module 8 of Procedures of Electricity Distribution (PRODIST), conducted by National Agency of Electric Energy (ANEEL), aims to improve the regulation of power quality, considering the phenomena harmonic distortion, voltage unbalance, voltage fluctuation and short term voltage variation. These regulatory changes impact in the way of analysis and treatment, of power quality disruption, by the electricity distribution. The developed work makes a study about the applications of these new regulatory requests and hopes to contribute with a better understanding. Through power quality measurements, in distribution substations, with different load profiles (industrial, urban and rural), was obtained a real view of the system, under the aspect of power quality, to evaluate the regulation adherence to the current version and proposed. In this case study, although being in accordance with the current methodology, happened a transgression of propose. With a comparative analysis, was possible to identify some phenomena that were more flexible in the proposed revision and others with more severe monitoring

Modelagem e simulação de ciclos a gás com resfriamento de ar na entrada

The optimization of energy generation systems has become a key issue for technological and social development, mainly in developing countries, where the electricity consumption rises sharply. Gas turbine cycle is an electricity generating system, which studies have demonstrated that inlet air cooling increases net power and thermal efficiency. Thus, this study intends to quantify these parameters for environments with different ambient temperature and relative humidity. Two types of air cooling were used: evaporative and absorption systems. The configuration parameters only with the gas turbine cycle were compared to those whose configuration allowed cooling. First, it was analyzed only evaporative cooling. Next, the absorption system was used for analysis. The last configuration mixed these two methods, dividing equally its flow. The results showed that thermal efficiency and net power increase in any case of cooling, with absorption system more advantageous in terms of generated energy, where an increase between 1 and 2 MW was observed, depending on the ambient conditions . When the two methods were working together at low relative humidity, it showed a thermal efficiency increase compared to absorption system, up to 2.4%. Evaporative cooling was less effective, but it is a good and cheap possibility to increase the cycle parameters at high temperature and low relative humidity

Análise organizacional de acidentes de trabalho no setor de distribuição de energia elétrica

Pós-graduação em Saúde Coletiva - FMB