将风险理论应用于电力系统的静态安全分析中，其风险主要包括线路的过负荷风险和电压越限风险。对于过负荷风险和电压越限风险，分别考虑了与过载和电压相关的主要因素，并采用了合适的后果严重度函数，分别建立了过负荷风险评估模型和电压越限风险评估模型。在新英格兰39节点系统中进行了仿真计算，并分别根据这2种风险指标对输电线路进行了重要性评估和排序。

Risk theory is applied in static security analysis of power system, and the risks mainly include line overload risk and voltage overlimit risk. For these two kinds of risks, several main factors related to overload and voltage are considered, and the risk assessment models of overload and voltage overlimit are established respectively based on an appropriate consequence severity function. Finally, the simulation calculation is completed in the New England 39-bus system, and the importance of transmission lines is evaluated and sequenced according to these two risk indicators.