Análise do impacto da geração distribuída na curva de carga em um alimentador de média tensão utilizando o software OpenDSS

Abstract

With the growth of renewable energy sources, especially distributed generation, it is essential to analyze the impacts of interactions between this new type of energy and the existing distribution network. This work aims to use the OpenDSS software to model a real ENEL Distribuição Ceará feeder with the purpose of analyzing, through simulations, the impacts of distributed microgeneration on the electrical energy distribution system, specifically on the load curve, the in order to mitigate this effect using storage elements (battery). The simulations were carried out considering 3 (three) scenarios, in which for each case a percentage of distributed generation penetration in the system was defined. In scenario 1, with a penetration of 25% of DG, it was possible to obtain, with the addition of a battery in the circuit, a 26% reduction in the power variation in the load curve. In scenario 2, there was a 34% reduction in power variation and a 26% reduction in injected energy related to the load curve with the presence of a battery. In scenario 3, a reduction in power variation of 47% and a reduction in energy injected into the grid of 13% were obtained. All values refer to the period between 4pm and 7pm. From the analysis of the data and information obtained in the simulations, it is concluded that the use of batteries for storage for later use, in periods of high demand, proves to be quite efficient, reducing both the power variation required from the feeder, i.e. avoiding possible physical damage to network equipment, as well as reducing the level of energy injected into the system.