Prestação de Serviços Ancilares Através de Geração Distribuída em Sistemas de Distribuição de Energia Elétrica

Abstract

In this work, the use of Distributed Generation (DG) in Eletrical Energy Distribution Systems (SDEEs) to provide ancillary services (SAs) of active power reserve for frequency control and reactive power support for voltage control, and assist the substation in providing power to meet the demands of the loads and system losses, was analyzed. In this context, a model of remuneration of the DG units was elaborated, based on their price offers to supply the SAs mentioned above and the demands of the loads, in which the Electric Energy Distribution Concessionaire (CDEE) is the only buyer. This model differs from the strategies adopted in the Brazilian Electric System (SEB), in which SAs are provided through electricity transmission networks and their remuneration is based on charges determined by the National Electric Energy Agency (ANEEL). The simulations were performed using the A Mathematical Programming Language (AMPL) software, using the Interior Point Optimizer (IPOPT) solver. The SDEE employed in these simulations was the modified 37-node radial distribution test system from the Institute of Electrical and Electronic Engineers (IEEE). From the results obtained, the reduction in total costs between the system without DG units and with these generators was 41.53%. Furthermore, active and reactive power losses decreased by around 98.31% and 97.3%, respectively. These values suggest the possible benefits that DG and their remuneration based on a competitive market can promote to SEB, to CDEE and, consequently, to the final consumers of electricity.