Power system resilience assessment considering the impact of ice disaster

With the increasingly obvious global climate change and the frequent occurrence of extreme weather events, the normal operation of the power system has a serious impact on the power system, once the extreme weather is bound to cause great harm to the distribution network system, causing large-scale paralysis of the power system, resulting in serious economic losses. Therefore, the study of power system toughness has attracted attention. In order to improve the toughness of the power system under ice disaster conditions, this study proposes a power system toughness assessment method considering the impact of ice disaster. First, the impact of ice disaster on transmission lines is analyzed and a transmission line fault model is established. Second, based on the quantitative index of power system toughness, the quantification of extreme disturbance events is transformed into the quantification of different line faults, and system-level toughness indexes are proposed in order to assess the toughness of the power system in a more specific and accurate way. Finally, the feasibility of the toughness assessment method is verified in the IEEE RTS-79 test system.