Title :
Analysis of the effect of lightning on the energized shield wire line technology
Author :
Ramos, J.E. ; Pires, V.A. ; Piantini, A. ; Obase, P.F. ; Neto, A. Silva ; de Carvalho, T.O. ; De Oliveira, Paulo R Borges
Author_Institution :
Eletrobras Distribuicao Rondonia, Porto Velho, Brazil
Abstract :
This paper examines the effect of lightning overvoltages resulting from direct strikes to the two SWL (energized shield wire line technology) systems located in the State of Rondônia, Brazil, with the aim of understanding how lightning affects the SWL system. The analysis covers the periods from 1996 to 2000 (Jaru SWL) and from 1997 to 2007 (Itapuã do Oeste SWL). Field measurements were carried out regarding both soil resistivity and tower footing resistance, as well as laboratory tests to determine the positive and negative critical impulse flashover voltage (CFO) of insulator strings. The influence of soil ionization is also considered.
Keywords :
flashover; insulators; lightning; overvoltage; poles and towers; power distribution lines; power transmission lines; CFO; energized SWL technology system; energized shield wire line technology system; insulator string; laboratory testing; lightning overvoltage effect analysis; negative critical impulse flashover voltage; power distribution line; soil ionization influence; soil resistivity; tower footing resistance; SWL technology; direct strokes; lightning performance; power distribution line; power supply interruptions;
Conference_Titel :
Lightning Protection (XI SIPDA), 2011 International Symposium on
Conference_Location :
Fortaleza
Print_ISBN :
978-1-4577-1898-4
DOI :
10.1109/SIPDA.2011.6088423
