基于微地形的输电线路覆冰等级判别方法

微地形影响输电线路的覆冰程度，根据典型微地形因子对导线覆冰的影响程度及排序情况，提出一种基于微地形的输电线路覆冰等级判别新方法；建立基于微地形的输电线路覆冰等级判别模型及覆冰对比度模型，定量揭示微地形因子与线路覆冰的关系．现场数据统计分析和实例验证结果表明：该方法不仅能定量判别输电线路的覆冰等级，而且能区分同等级覆冰的电力线路覆冰程度，为输电线路的抗冰和防冰提供了理论依据．

Microtopography based icing grades judging method for transmission lines

Microtopography could exert great influence on transmission lines icing. According to the influence degree of transmission lines icing and its sorting situation caused by the fourteen kinds of typical microtopographies, a novel microtopography based icing grades judging method was proposed, and the icing grades judging model and icing contrast model were built, which quantitatively revealed the proportion relations of the microtopography contribution to transmis- sion lines icing. Statistical analysis results of field data and instances validation showed that this method can quantitatively judge icing grades of transmission lines and can also get the icing grades distinction. The icing grades judging supply theoretical foundation to the anti-icing designs and anti-icing measurements of the power transmission lines, especially which pass through the severe icing regions.