| Texto completo | |
| Autor(es): |
da Silva, Mauricio Pavani
;
Lopes, Gabriela Nunes
;
Vieira, Jose Carlos M.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | 2023 IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES LATIN AMERICA, ISGT-LA; v. N/A, p. 5-pg., 2023-01-01. |
| Resumo | |
The contact between an energized conductor and a low-conductivity surface can originate High Impedance Faults (HIFs). Current signals measured during HIFs have low amplitude, hindering their detection by traditional protection methods, and are usually non-linear. Therefore, many HIF Detection Methods (HIFDMs) are based on the signals' harmonics, which have peculiar characteristics during HIFs. However, most existing HIFDMs do not consider the influence of current transformers (CTs) at the interface between the power grid and the relay during the testing stages. In this context, this paper analyzes CT's influence on the amplitude and angle of harmonics extracted from current signals measured during HIFs and on existing HIFDMs. The results demonstrate the influence of CT transformation ratio, overload factor, ratio error, and HIF incidence bus on the analyzed parameters. Thus, this paper has the goal to assist researchers in developing methodologies tested in increasingly realistic situations. (AU) | |
| Processo FAPESP: | 20/06935-5 - Metodologia para detecção e localização de faltas de alta impedância em sistemas de distribuição com geração distribuída |
| Beneficiário: | Gabriela Nunes Lopes |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |