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Specification of minimum short-circuit capacity for three-phase unbalance limitation based on an efficient algorithm

机译：基于高效算法的三相不平衡极限最小短路容量规格

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摘要

To regulate the nonsinusoidal or 3φ unbalance current injection into the utility systems, power utilities have to specify the minimum 3φ short-circuit current, at the point of common coupling with the customers having the distortion source. However, the present specification rules, without theoretical verification, caused controversy between the utility and the customers under regulation. To resolve this controversy, this paper presents an efficient estimation algorithm for the minimum 3φ short-circuit current. We then estimate the maximum traction load at seven 161 kV substations of the Taiwan high-speed railway system which is now being planned. Using the maximum traction load and the minimum short circuit capacity derived, we estimate the maximum unbalance of the 3φ voltage at these seven 161 kV substations, and compare our results with those of Taipower to demonstrate the effectiveness of our proposed algorithm.
机译：为了调节非正弦或3φ不平衡电流注入到公用事业系统中，电力公司必须在与具有失真源的用户共同耦合时指定最小3φ短路电流。但是，本规范规则未经理论验证，在公用事业公司和受监管的用户之间引起了争议。为了解决这一争议，本文提出了一种有效的最小3φ短路电流估计算法。然后，我们估计正在计划中的台湾高速铁路系统的七个161 kV变电站的最大牵引负荷。使用最大牵引负载和最小短路容量，我们估算了这七个161 kV变电站中3φ电压的最大不平衡，并将我们的结果与Taipower的结果进行比较，以证明所提出算法的有效性。

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