提出了一种结合模糊理论和风险矩阵法对输电线路安全风险进行评估的方法。首先，根据《电力安全事故应急处置和调查处理条例》等法律法规确定风险后果；其次，深入分析了影响输电线路运行状态的因素，建立了输电线路运行状态因素指标体系。以此为基础建立了输电线路模糊综合评价模型，用以评价风险发生概率；最后，用风险后果等级和风险发生概率构建了风险矩阵对风险进行分级，并制定相应的风险控制措施。以一个实际线路风险为例检验了该方法的可操作性，提出的风险评估方法可以为输电线路运维工作提供指导，从而降低电网运行风险。

This paper studied the risk assessment method for transmission line security,combined of fuzzy theory and risk matrix.Firstly,the risk consequences were determined according to the relevant laws and regulations.Then,the transmission line status factor index system was established after indepth analysis. On this basis,the fuzzy comprehensive evaluation model was established,which was used to evaluate the probability of risks.Finally,the risks were graded by risk matrix,which was built with risk consequences and probability, and formulated the risk control measures.An example of an actual line risk test the operability of the method.Risk assessment methodology proposed in this paper could provide guidance for the operation and maintenance of transmission lines,thereby reducing the risk of power grid.