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Failure Rate Evaluation of Sensitive Equipment Caused by Voltage Sag

机译：电压凹陷诱导敏感设备的故障率评估

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摘要

In order to accurately evaluate sensitive equipment failure rate caused by voltage sag, the concept of credibility measure is introduced to measure the uncertainty of equipment failure event. This evaluation measure can avoid the deficiencies containing in classical probability measure which needs a large number of testing samples. The uncertainty of failure event is presented by a fuzzy measure where the membership function of equipment voltage tolerance curve corresponding to the characteristic quantities in the uncertain area was determined by fuzzy statistical and a polynomial fit method. Then the credibility distribution function was determined. The proposed evaluation model of sensitive equipment failure rate caused by voltage sag is developed. Using the practical testing samples, the personal computer (PC) was evaluated by the proposed method. Comparing the proposed method with current methods, the results have shown that the proposed method is proper, correct and credible. This method may be more practicable in practical condition.
机译：为了准确评估电压凹陷引起的敏感设备故障率，引入了可信度措施的概念来测量设备故障事件的不确定性。该评估措施可以避免含有在需要大量测试样品的经典概率测量中的缺陷。故障事件的不确定性由模糊测量提出，其中通过模糊统计和多项式拟合方法确定与不确定区域中的特征量对应的设备电压容差曲线的隶属函数。然后确定可信度分布函数。开发了由电压凹陷引起的敏感设备故障率的提出评估模型。使用实用的测试样本，通过所提出的方法评估个人计算机（PC）。将提出的方法与当前方法进行比较，结果表明该方法是适当的，正确和可信的。这种方法可以在实际情况下更加实际上是更可行的。

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