中文摘要：

覆冰灾害对特高压电网经济性有重要影响,鉴于不同输电线路受覆冰影响不同,建立了考虑覆冰灾害的特高压电网差异化经济性评估模型。该模型基于全寿命周期成本理论和差异化理论,从成本和收益两个方面出发,构建差异化全寿命周期成本效益评估指标体系。采用对比评估方法评估差异化方案和常规方案的经济性,为特高压电网规划与建设提供理论依据。最后,通过算例分析验证了评估方法的有效性和合理性。

英文摘要：

The economical efficiency of ultra high voltage（UHV）power system is significantly affected by icing disas-ter. Considering that the transmission line is differently affected by icing,a differentiation economic assessment model is established. The model is based on life cycle cost（LCC）theory and differentiation theory. Moreover,from two aspects of cost and income,a differentiation life cycle cost economic assessment index system is provided. The economical effi-ciencies of differentiation program and conventional program are analyzed through contrast evaluation method ,which can provide theoretical basis for the planning and construction of UHV power system. At last,the effectiveness and ratio？nality of the proposed method is validated through case study.