The impact of voltage sag on sensitive devices is related to the time when the sag occurs. However, the point-on-wave of a sag is uncertain. Therefore, this paper presents a novel approach to evaluate the voltage sag severity considering a random point-on-wave. First, the uncertainty of equipment malfunction is revealed. Second, under a given residual voltage, the relationship between the point-on-wave and the duration that the device can withstand is described with a fitting curve. Third, a voltage sag probabilistic index is proposed to describe the severity. The evaluation procedure is also presented. Finally, three types of releasers are tested and analyzed to determine the effectiveness of the proposed method. The evaluation method can help instruct electrical engineers establish more well-grounded sag mitigation proposals.

中文翻译：

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考虑波点的电压暂降严重程度评估方法和概率指标

电压骤降​​对敏感设备的影响与电压骤降发生的时间有关。但是，下垂的波点是不确定的。因此，本文提出了一种新的方法来评估考虑到随机波上点的电压骤降的严重性。首先，揭示设备故障的不确定性。其次，在给定的残余电压下，波峰点与设备可以承受的持续时间之间的关系用拟合曲线描述。第三，提出了电压暂降概率指标来描述严重程度。还介绍了评估程序。最后，对三种类型的释放器进行了测试和分析，以确定所提出方法的有效性。该评估方法可帮助指导电气工程师建立更多接地良好的下垂缓解建议。