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A Novel Method of Measuring Inherent Power System Charging Current

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3 Author(s)
Paul, D. ; AECOM, Oakland, CA, USA ; Sutherland, P.E. ; Panetta, S.A.R.

High-resistance grounded (HRG) power systems have been used in many industries to minimize equipment damage, including but not limited to mining, petrochemicals, shore-to-ship power supplies, and many others. The system charging current value should be known for designing an HRG power system. One method of determining the system charging current is to perform engineering calculations involving the inherent capacitance to ground for each of the power system components. However, this method may not provide accurate data as the sneak capacitance to ground for power system components cannot be determined due to their installation configuration. Therefore, it is essential to have a reliable method of measuring the system charging current. Before describing the proposed method of measuring the system charging current, fundamental concepts of system charging current and its mathematical analysis are provided. In addition, power system arcing faults and the associated damage when a fault remains line-ground faulted, particularly in the case of a medium-voltage power system, are included. Finally, a novel and suitable method of measuring the inherent power system charging current is presented.

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Industry Applications, IEEE Transactions on  (Volume:47 ,  Issue: 6 )