A Novel Method to Reduce Direct-Coupled Distributed Generation Impact on Electric Distribution System Protection

• Autor(a) principal: Guarda, Fernando Guilherme Kaehler
• Data de Publicação: 2018
• Outros Autores: Cardoso Junior, Ghendy, Bezerra, Ubiratan Holanda, Giuliani, Eduardo, Vieira, João Paulo Abreu
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Manancial - Repositório Digital da UFSM
• dARK ID: ark:/26339/0013000011mnh
• Texto Completo: http://repositorio.ufsm.br/handle/1/30674
• topic: Distributed generation; Distribution Systems; Fault current limiters; Protection Systems; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA

This paper presents a method to place, size, coordinate and adequate protection systems in electric distribution networks with directly-coupled distributed generation (DG). DG penetration brings several benefits to the grid. However, adding DG to the grid may cause serious problems. This paper introduces a method to determine the allocation of protective devices, as well as their coordination and sizing. Firstly, recloser allocation problem is treated in a multiobjective approach, solved using particle swarm optimization. Fuse cutouts allocation is determined by a set of rules, developed considering feeders particularities. DG is then considered, and its effects on the protection coordination are evaluated. In order to adapt the grid to receive DG, fault current limiters (FCL) are placed to avoid fuse cutouts miscoordination, as well as recloser - fuse miscoordination. Recloser operation is analyzed to avoid misoperation in the presence of DG. Results are presented for the considered test systems to show the functionality and performance of the proposed method.