Abstract:

The classification of icing areas is one of the critical steps of the power grid construction. If the design ice thickness is underestimated, power transmission lines may not be able to withstand the influence of accreted ice, which might result in transmission line breaking or even tower collapse. On the other hand, if the design ice thickness is overestimated, the cost of construction, maintenance, and reconstruction may be increased to result in resources waste. With the aim of reasonable classification of icing area for power grid, five classification methods were discussed, including method of experience investigation, method of icing data, method of CRREL model, stepwise regression method of meteorological parameters, and model method of local topology-meteorology influence on icing classification. Finally, the classification steps and application features were discussed.

Key words: transmission line, classification of icing areas, method of experience investigation, method of icing data, method of CRREL model, stepwise regression method of meteorological parameters, model method of local topology-meteorology influence on icing classification