Sobretensões devidas à operação dos fornos elétricos a arco. Proteção dos equipamentos principais

• Ano de defesa: 1989
• Autor(a) principal: Antonio Donizetti de Andrade
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Engenharia Elétrica; Fornos eletricos; Engenharia elétrica
• Link de acesso: http://hdl.handle.net/1843/BUOS-8WZJG7

The present work studies the Electric Arc Furnaces functioning, under the electric system point of view , and identifies the origins and main types of overvoltages produced by their operation. The methods for approximated and accurate overvoltage calculations are introduced. A software, to simulate the chopping of a single phase transformer magnetlzing current in a digital microcomputer, was developed. This program consider the eddycurrent losses and the transformer lnductance nonlinear effect. The correctlve measures to protect the furnaces transformers against overvoltages and the procedures to specify them are presented. The work results mainly allow the development and utlllzation of more reliable protections for Electric Arc Furnaces equipments.