Overvoltage Suppression in Half-Wavelength Transmission Systems using Line Surge Arresters

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Author(s):	Proenca, Felipe ; Pereira, Ronaldo F. R. ; Costa, Eduardo C. M. ; Liboni, Luisa Helena B. ; IEEE Total Authors: 5
Document type:	Journal article
Source:	2019 INTERNATIONAL SYMPOSIUM ON LIGHTNING PROTECTION (XV SIPDA); v. N/A, p. 6-pg., 2019-01-01.
Abstract
The principal electric characteristics of half-wavelength transmission lines are discussed taken into account possible voltage transients resulted from asymmetric faults. Although this non-conventional technology has some attractive advances for electric power transmission through long distances, if compared to well-established HVDC and HVAC systems, important issues should be investigated concerning overvoltage levels along the transmission line due to temporary asymmetric operation conditions, e.g. phase-to-ground faults. Depending of the type of fault and location along the half-wavelength transmission line, overvoltage levels at some points through the line exceed 1.8 p.u. Thus, since some critical fault occurrences and overvoltage location are known, an alternative method for overvoltage suppression is proposed by using ZnO surge arresters directly at the phases in parallel with the tower insulators. (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