Abstract
With the development of the transmission line scale and the improvement of the voltage level, the height and span of the tower are increasing, and the ice disaster occurs frequently in some areas, which has become an important factor affecting the security and stability of the power grid. Based on the analysis of the ice and ice flashover mechanism, this paper firstly discusses ice disaster influencing factors from three main angles, such as, the potential fault of transmission line, operation and maintenance characteristics and meteorological conditions, and then uses multi factor classification method to build the ice disaster risk evaluation model for transmission line. Further, taking the 220kV and above transmission lines in a certain area of South China as a research object, this paper evaluates all the lines and towers ice disaster risk, obtains the lines or towers with high risk level using the model, and the evaluation results have been verified on site. Finally, combined with the rating of risk evaluation factors, this paper formulates a special anti-icing measure to ensure the safe and stable operation of transmission lines.
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