基于方向记忆及故障特征分级的故障方向判别方法

Fault Direction Decision-Making Method Based on Direction StateMemory and Hierarchical Fault Characteristics

基于方向记忆的故障方向判别方法是通过对不同故障时间区间的故障方向判别数据进行统计,得出各时间区间内故障方向判别结果出现的概率,并与各时间区间预先设置的最小概率值进行比较,从而得出方向元件的判别结果。设置2级故障特征参数,根据故障时的故障分量特征等级,对故障分量方向元件及功率方向元件的判别结果进行取用决策,实现了故障方向定位。

Based on the fault direction discrimination method of direction memory,the probability of fault direction discrimination results in each time interval is obtained by statistically matching the fault direction discrimination data of different fault time intervals.The minimum probability value preset for each time interval is compared to obtain the discriminant result of the direction element.The two-level fault characteristic parameters are set,and according to the fault component characteristic level at the time of the fault,the fault component direction element and the power direction component are selected to make a decision to achieve fault direction positioning.