Parametrização de proteção secundaria em subestação de média tensão de 13,8kV : estudo de caso do prédio da Reitoria da UEA

Abstract

This paper presents a case study of the secondary protection system, which is currently installed within the 13.8 kV substation of UEA-REITORIA, using concepts of microprocessed secondary protection systems. The main tool used was the microprocessor-based relay UPER 6104, which can be programmed using previously calculated parameters, thus establishing limits and requirements for the full operation of energy in accordance with the concessionaire's rules and also protection through sectioning in cases of failures. Annual energy bill data was applied to survey the demanded power consumed by the establishment today (kWh) and the power study project of the UEA-REITORIA substation, to obtain the short circuit values of the concessionaire offered in that establishment point. In addition, through a calculation report, new parameters were obtained for the programming of the UPER 6104 relay, just comparing the new data obtained with those already installed inside the substation for a technical analysis as to its current performance and whether it still meets protection requirements.