Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Palavras Chaves: Geração distribuída, Perdas Elétricas, Potência Reativa, sistemas fotovoltaicos

Resumo
Neste trabalho é apresentado um algoritmo de controle de injeção de potência reativa em uma rede de distribuição elétrica radial com geração distribuída fotovoltaica. O algoritmo proposto tem como objetivo prover um balanço entre regulação de tensão e redução de perdas elétricas. A potência reativa injetada é controlada por meio de inversores de conexão à rede, que conectam seus respectivos geradores fotovoltaicos aos barramentos da rede de distribuição. O desempenho do algoritmo foi avaliado em uma rede elétrica monofásica rural de 100 barras por meio de várias simulações computacionais. Foram utilizados quatro fatores de penetração fotovoltaica na rede, e são apresentados os perfis de tensão em cada barra, assim como as perdas na distribuição. Nos resultados, o algoritmo proposto obteve as menores perdas e o melhor perfil de tensão (mais próximo a 1 pu) nos cenários simulados em comparação com outros algoritmos propostos na literatura.

Title: Algorithm to Control Reactive Power for Adequacy of Voltage Values and Loss Reduction in Distribution Systems

Keywords: Distributed Generation, Photovoltaic Systems, power losses, Reactive Power

Abstract
This work presents an algorithm to control the injection of reactive power in a radial electrical distribution network with distributed photovoltaic generation. The proposed algorithm aims to provide a balance between voltage regulation and reduction of electrical losses. The reactive power is controlled by grid-connected photovoltaic inverters, which connects their respective photovoltaic (PV) arrays to the buses of the distribution network. The performance of the algorithm was evaluated in a 100 buses rural single-phase electrical network through several computational simulations. Four levels of photovoltaic penetration were used in the simulations. The voltage profiles in each bar are presented, as well as the distribution losses. In the results, the proposed algorithm obtained the lowest power losses and the best voltage profile (near to 1 pu) in the simulated scenarios in comparison with other algorithms proposed in the literature.

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