Avaliação da Resposta em Frequência do Enrolamento de Transformadores de Médio Porte Considerando Diferentes Condutores

Débora Microni Soares; Antonio C. S. Lima; Antonio Carlos Ferreira

doi:10.20906/SBAI-SBSE-2023/3996

Débora Microni Soares Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ
Antonio C. S. Lima Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ
Antonio Carlos Ferreira Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ

DOI: https://doi.org/10.20906/SBAI-SBSE-2023/3996

Keywords: Modeling and simulation of power systems, Frequency domain identification, Test and documentation, Errors in variables identification, Fault detection and diagnosis

Abstract

Power transformers are key equipment in an electric power system, and any failure might lead to power outages and financial losses to consumers and/or power utilities. Typically, aluminum and copper are used in the windings and although there is a verification regarding the low frequency behavior, little has been investigated regarding the winding behavior in a wider frequency band. Wideband tests are key to assessing and investigating possible issues internal to the transformer. This work proposes to investigate this aspect considering five types of medium size transformer ranging from 2 to 3 MVA. It also presents a comparison of a rational approximation of transformer windings which can then be used to evaluate terminal voltages and the impact due to high frequency harmonics in the transformer.