Open AccessTree-related Electric Outages Due To Wind Loading
Author(s) -
Siegfried Guggenmoos
Publication year - 2011
Publication title -
arboriculture and urban forestry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.222
H-Index - 47
eISSN - 2155-0778
pISSN - 1935-5297
DOI - 10.48044/jauf.2011.019
Subject(s) - storm , tree (set theory) , wind speed , environmental science , meteorology , transmission (telecommunications) , wind power , computer science , engineering , telecommunications , geography , mathematics , electrical engineering , mathematical analysis
In the aftermath of a wind storm that interrupted service on more than 40% of Puget Sound Energy’s transmission system, the regulator or-dered an investigation to evaluate options for hardening the electric system. The initial phase of the study quantified the extent of tree exposure along the transmission system and examined the correlation between various field measurable variables and tree-caused outage frequency. This phase of the work correlated 10 years of wind data with 10 years of outage data. Tree failure rates were calculated and used to model tree-caused outage expecta-tions based on wind speed. Models were developed to assess the outage impact of interventions that reduce the transmission system exposure to trees.