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Fault analysis on distribution feeders with distributed generators

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2 Author(s)
M. E. Baran ; Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA ; I. El-Markaby

This paper shows that the current an inverter interfaced distributed generator (IIDG) contributes to a fault varies considerably, due mainly to fast response of its controller. This paper proposes a method to extend the conventional fault analysis methods so that IIDG contribution can be estimated in the fault analysis. The proposed method gives rms profiles of the fault currents of interest (IIDG contribution and the fault currents the protective device will see). Test results, based on a prototype feeder, show that the proposed approach can estimate the fault current's contributions under both balanced and unbalanced fault conditions.

Published in:

IEEE Transactions on Power Systems  (Volume:20 ,  Issue: 4 )