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A Novel Way to Distinguish Single Phase Dips Through Potential Gradient Method

机译:电位梯度法识别单相倾角的新方法

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The majority of faults on a utility system are line-to-ground faults, and it is also the most common cause of voltage dips in industrial system. The disruption of an industrial process due to a line-to-ground fault can result in substantial costs to operation. The dip in the single phase associated with this fault is either type B or D. However, type D is also associated With to line-to-line faults. For the application of a suitable mitigation scheme to voltage dips, it is essential to distinguish between type B and D from measured sag voltages. This article discusses the characteristics of dips associated with line-to-ground and line-to-line faults and presents a new method to detect type B and D with the help of positive- and negative-sequence potential gradient methods derived as a function of distance to fault location. The need to distinguish type B and D, and the advantages of characterization through the sequence component, are also discussed.
机译:公用事业系统上的大多数故障是线路接地故障,也是工业系统中电压下降的最常见原因。由于线对地故障而导致的工业流程中断可能会导致运营成本高昂。与该故障相关的单相骤降是B型或D型。但是,D型也与线对线故障相关。为了将适当的缓解方案应用于电压骤降,必须从测量的垂降电压中区分出B型和D型。本文讨论了与线对地和线对线故障相关的骤降的特征,并提出了一种新的方法来检测B型和D型,借助正负电势梯度方法得出B型和D型。到故障位置的距离。还讨论了区分类型B和D的需求,以及通过序列组件进行表征的优点。

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