Modernização da proteção elétrica do barramento auxiliar de 6,3kv da ute Jorge Lacerda A

• Autor(a) principal: Rosa, Leandro da
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/4191
• topic: Barramentos em sistemas de energia; Motores elétricos; Relé de proteção; Transformadores de potência

Power system buses are electrical power equipment used to connect various other equipment, such as motors, feeders and transformers. By their nature, they are subject to various types of defects and, therefore, the use of protection systems is essential. Such system consists of protection relays and associated elements, the purpose of which is to identify defects or unsafe operating conditions of the protected element, promoting its withdrawal from service and aiming to avoid, or at least minimize, possible damage to equipment connected to this system. In this sense, the present work presents a bibliographic review complemented with the steps for replacing electromechanical protection relays with digital SEL relays on the 6.3 kV bus. The project contemplates the exchange of 51 protection relays, with 20 relays installed in the first execution phase and in the next phase, which will take place in mid-2021, another 31 relays will be installed, the proposed project being finalized. The plant where the relays were replaced has approximately 45 years of operation and throughout this work, the advantages and characteristics of the new equipment to be installed will be pointed out, the development of the electrical modernization project, protection calculations used in the relays, physical installation and final tests for validation of the electrical protection circuit applicable specifically to power system busbars according to the European standard IEEE std C37.234-2009, protection of alternating current (AC) electric motors according to the European standard IEEE std C37 .96-2012, relays and relay systems associated with electrical power devices according to the European standard IEEE std C37.90-2005 and protection of power transformers according to the European standard IEEE std C37.91-2008.