A Experiência Brasileira com a Utilização da Tecnologia Cabos Para-Raios Energizados (PRE) para Distribuição de Energia (The Brazilian Experience in the Use of the Shield Wire line Technology (SWL) for Energy Distribution)

José Ezequiel Ramos (jer.pvh@gmail.com)1, Alexandre Piantini (piantini@iee.usp.br)2, Valdemir Aparecido Pires (valdemirp@ceron.com.br)1, Ary D'Ajuz (adajuz@ons.org.br)3


1Centrais Elétricas de Rondônia
2Universidade de São Paulo
3Operador Nacional do Sistema Elétrico

This paper appears in: Revista IEEE América Latina

Publication Date: Dec. 2009
Volume: 7,   Issue: 6 
ISSN: 1548-0992


Abstract:
This paper presents an analysis of the impact of the lightning overvoltages on the operational performance of the energized shield wire line technology (SWL) implemented in two locations of the State of Rondônia, Brazil. The analysis covers the periods of 1996 to 2000 (SWL Jaru) and 1997 to 2002 (SWL Itapuã do Oeste), and shows that lightning is responsible for most of the system outages. The paper describes the satisfactory results achieved with the system, showing that the isolation and energization of the shield wires does not deteriorate the lightning performance of the 230 kV transmission lines. Comparisons between the performances of the SWL technology, conventional 34.5 kV lines, and thermal power plants in operation in the same region are also presented. The results demonstrate the technical and economical viability of the SWL technology and show that its application can lead to a postponement of the investments.

Index Terms:
Lightning, power distribution, power transmission lines, energized shield wire line, operational indexes   


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