contingency

As an essential part in the power system security analysis, the whole process of contingency selection becomes more sensible by taking the probability aspect into consideration.

作为电力系统安全分析中的重要组成部分,偶然事故的选择由于在分析过程中加入了对事故发生率的考虑而变得更具有合理性。

Combined with performance index which is used in contingency ranking generally with reliability index or economics index to form expectancy of system influence,it can rank the contingencies.

采用间接法对电力系统中的偶然事故进行排序,同时将偶然事故排序中通常采用的系统行为指标同系统的可靠性与经济性指标相结合,形成新的偶然事故对系统影响的期望值,根据新的期望值对偶然事故进行排序,使排序更具有合理性。