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首页> 外文期刊>Smart Grid, IEEE Transactions on >Time-Domain Algorithm for Locating Evolving Faults
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Time-Domain Algorithm for Locating Evolving Faults

机译：定位时域演化故障算法

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摘要

Evolving faults are faults beginning in one phase of a distribution circuit and spreading to another phase after a few cycles. This paper develops a time-domain algorithm for estimating the location of such faults. The algorithm is divided into two parts, namely, the single line-to-ground portion of the fault and the line-to-line-to-ground portion of the fault. The arc voltage that exists during faults is taken into consideration while deriving this methodology. For the single line-to-ground portion of the fault, the distance to the fault is estimated in terms of the loop or self-reactance between the monitor and the fault. On the other hand, for the line-to-line-to-ground and line-to-line portion of the fault the distance is estimated in terms of the positive-sequence reactance. The reactance-to-fault estimate is more robust than that of the resistance-to-fault, because it is unaffected by fault resistance. Two evolving fault cases and two line-to-line fault cases are analyzed in detail and the error in the location estimates is found to be below 10% in each case. Ten additional cases are analyzed and linear regression analysis is conducted to demonstrate the accuracy of the fault location estimates.
机译：不断发展的故障是指从配电电路的一个相开始并在几个周期后扩展到另一相的故障。本文提出了一种时域算法来估计此类故障的位置。该算法分为两部分，即故障的单线接地部分和故障的线对线接地部分。推导此方法时，要考虑故障期间存在的电弧电压。对于故障的单线接地部分，根据监控器和故障之间的环路或自反应来估计到故障的距离。另一方面，对于故障的线对线接地和线对线部分，以正序电抗估算距离。故障抗性的估计比故障抗性的估计更可靠，因为它不受故障电阻的影响。详细分析了两个演变中的故障案例和两个线对线故障案例，发现位置估计误差在每种情况下均低于10％。分析了另外十种情况，并进行了线性回归分析以证明故障位置估计的准确性。

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