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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Temporary overvoltage suppression in half-wavelength transmission lines during asymmetric faults

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Author(s):
Albuquerque, Felipe Proenca [1] ; Ribeiro Pereira, Ronaldo F. [1] ; Marques Costa, Eduardo C. [1] ; Bartocci Liboni, Luisa H. [2]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Polytech Sch, Dept Energy & Automat Engn, Sao Paulo, SP - Brazil
[2] IFSP Fed Inst Educ Sci & Technol Sao Paulo, Sertaozinho, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Electric Power Systems Research; v. 178, JAN 2020.
Web of Science Citations: 0
Abstract

This paper approaches the principal electric characteristics of half-wavelength transmission lines and possible voltage transients resulted from asymmetric faults. Although this non-conventional AC transmission technique presents some attractive advances for electric power transmission through long distances, when compared to the well-established HVDC systems, some important issues should be investigated on eventual overvoltage levels along half-wavelength transmission lines during temporary asymmetric operation conditions, e.g. phase-toground fault and single-phase reclosing. In this research, an iterative computational routine locates the overvoltage points by varying the asymmetric fault location from the sending to the receiving end of the transmission line. This procedure provides a full mapping of the most critical overvoltages as a function of the fault point through the line length. Since the most critical fault occurrences and overvoltage locations are known, an alternative method for overvoltage suppression is proposed by using line surge arresters directly at the phases in parallel with the tower insulators. This technique represents an original method to contain overvoltages at middle sections of half-wavelength transmission lines. (AU)

FAPESP's process: 16/16078-7 - Modeling metal-oxide surge arresters for electromagnetic transient simulations in power systems
Grantee:Felipe Proença de Albuquerque
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 18/10952-2 - Analysis of VSC-HVDC Power Transmission Systems against Atmospheric Impulses
Grantee:Eduardo Coelho Marques da Costa
Support Opportunities: Regular Research Grants