基于离差最大化的事故扫描综合指标法

Comprehensive Index Method of Contingency Screening Based on Maximizing Deviations

在线动态安全分析不可避免地要对大批量的预想故障进行分析与评价。事故扫描综合指标法一般通过快速计算反映事故严重程度性能指标的综合值,依据综合指标值进行排序,从而达到快速筛选预想故障的目的。不同的指标权重对排序结果产生不同程度的影响,为提高计算筛选结果的客观性,引入离差最大化方法来确定指标权重,计算加权指标综合值。通过仿真算例,验证了该方法的有效性。

A large number of anticipated faults must be analyzed and evaluated necessarily in the on-line dynamic security assessment. Comprehensive index method of contingency screening is generally based on the fast calculation of the comprehensive value of performance indexes which reflects the severity of the fault, and then faults are sorted by comprehensive index values so as to achieve the purpose of rapid screening and sorting. Different index weights have different degrees of influence to the result of sorting. In order to improve the objectivity of calculating screening results, the maximizing deviations method is introduced to determine index weights and to calculate weighted comprehensive index values. Simulation examples verify the effectiveness of the proposed method.