Affiliation:
1. Département des sciences appliquées Université du Québec à Chicoutimi Chicoutimi, Québec G7H 2B1 CANADA
2. Département de génie mécanique École de Technologie Supérieure Montréal, Québec H3C 1K3 CANADA
Abstract
Atmospheric icing is a major factor for power line design and reliability. Therefore, a test power line, located on mount Valin (Québec) Canada, was used to obtain data on atmospheric icing. The most dangerous ice accretions are glaze, hard rime, wet snow and mixtures. Results show it is possible to distinguish between them using temperature measurement, and comparative analysis of the data from an icing rate meter and a heated rain and snow gauge. The ice load variation on conductors and the meteorological data are presented for the most important icing events of the 1991-1992 season. The analysis shows that the icing and shedding rates are generally greater for the 12.5-mm diameter cable than for the 34-mm cable; single or in a bundle. On the average, the shedding rate is higher for freezing rain and wet snow, compared to in-cloud icing. Comparing the mount Valin data with a constant rate ice accretion and shedding model, the correlation coefficient varies from 92 to 97 percent.
Publisher
Canadian Science Publishing