Electric systems failures produced by CG lightning in Eastern Amazonia

Abstract

Operational records of power outages of the electric energy distribution systems in eastern Amazonia presented a large number of events attributed to lightning strikes, during the 2006 to 2009 period. The regional electricity concessionary data were compared to actual lightning observations made by SIPAM's LDN system, over two areas where operational sub systems of transmission lines are installed. Statistical relations were drawn between the monthly lightning occurrence density and the number of power outages of the electric systems for both areas studied. The results showed that, although with some delays between these variables peaks, the number of power disruptions has a tendency to follow the behavior of the lightning occurrence densities variations. The numerical correlations were positive and may be useful to the transmission lines maintenance crews at least for the Belém-Castanhal electricity distribution sub system. Evidence was found, that the SST's over certain areas of the Pacific and Atlantic Oceans, influence convection over the area of interest, and may help to prognosticate the periods of intense electric storms, requiring repair readiness for the regional electric systems.

Variabilidade Espacial e Temporal de Descargas Atmosféricas na Região Norte

“…A descarga atmosférica produz uma grande emissão de radiação eletromagnética em ampla faixa do espectro, indo desde radiações na faixa do visível até às frequências dos raios gama (Cooray, 2003) No período de 2009 a 2015 foram registradas mais de 220 milhões de descargas atmosféricas na região amazônica, por conta de suas características geográficas e climáticas peculiares. Em todo o país, os prejuízos materiais e os danos provocados por falhas nos sistemas de energia elétrica e de telecomunicações devidas aos raios costumam ser contabilizados na casa dos milhões de reais, anualmente (CBPF, 2010;Santos et al 2014;Pompeu et al, 2018;Silva et al, 2018).…”

Automatic lightning stroke location on transmission lines using data mining and synchronized initial travelling

“…Other cases demonstrating that electric power is susceptible to lightning phenomenon occurred in the southeastern Amazonia in the state of Pará, where frequent outages have been attributed to this phenomenon. Thus, different outages have been produced in the Brazilian network [5,6]. This zone has the highest flash peak current magnitude compared to anywhere else worldwide [7,8].…”