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Encontro de Energia no Meio Rural


MARQUES, Frederico A. S., MORAN, Jesus A., ABREU, Lísias et al. Impactos da expansão da geração distribuída nos sistemas de distribuição de energia elétrica. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 19 May 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000200004&lng=en&nrm=iso> .

Due to the recent Brazilian electricity crisis, the advantages of the centralized rain dependent generation were put under discussion. The co-generation is an option for the consumer that does not want to be harmed by eventual interruptions in the energy supply and nor to pay higher tariffs during pick load. Besides, the excess of co-generation can be sold for the distribution companies, making possible that the independent producer has profits participating of the electricity power market. The distributed generation provides several benefits, for the fact of being a generation that is located close to the load. Besides, it allows the supply of the growing demand in a fast way, since the construction of big hydroelectric plants, that is the generation model more used in Brazil, is a slow process. With that, the insertion of distributed generation in the Brazilian system tends to become every more common year to year, as it has been happening in other countries. It is noticed, however, that few technical studies on the impacts of the distributed generation in the distribution systems were accomplished to the moment. Problems as over-voltages during light load, impacts on the protection system, and dynamic stability problems, very common in large centralized synchronous machines, can also start to happen in the distribution systems. This article presents a preliminary study on the influence of distributed synchronous generators in the operation of a distribution system. The analyzed technical aspects are: voltage profile, voltage stability, active and reactive power losses, and also critical clearing times for eliminating faults considering different sceneries. The simulations results show which are the main operative restrictions for maximizing the penetration level of distributed generation related with the dynamic and steady-state performance of the electricity distribution system.

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