Resumo

OROZCO HENAO, César Augusto; MORA FLOREZ, Juan José  e  PEREZ LONDONO, Sandra Milena. STRATEGY TO REDUCE THE UNCERTAINTY INTERVALS APPLIED IN FAULT LOCATION FOR POWER DISTRIBUTION SYSTEMS. Cienc. Ing. Neogranad. [online]. 2012, vol.22, n.2, pp.131-152. ISSN 0124-8170.

ABSTRACT In this paper, a strategy based on an iterative algorithm used to determine the minimum fault reactance, applied to reduce the Fibonacci uncertainty intervals is proposed. This strategy increases the accuracy of the proposed fault location using a variable step to calculate the minimum fault reactance. The algorithm uses measurements of voltages and currents at the power substation also considering variations between pre-fault and fault steady states. The strategy is validated at the IEEE 34 test feeder, considering single-phase, two-phase and three-phase faults and also fault resistances from 0 to 40 ohms. According to the obtained results, the estimation error is lower than 1.8%, which validates the good performance of the proposed approach.

Palavras-chave : Fault location; uncertainty intervals; impedance-based method; power distribution systems.

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