Abstract

OROZCO-HENAO, CESAR; MORA-FLOREZ, JUAN JOSÉ  and  PEREZ-LONDONO, SANDRA. ITERATIVE STRATEGY TO ADJUST THE SYSTEM LOAD APPLIED FOR LOCATING FAULTS IN POWER DISTRIBUTION SYSTEMS. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.177, pp.59-68. ISSN 0012-7353.

This paper presents an iterative strategy to adjust the system load which is applied for locating faults in power distribution systems. The strategy estimates the system load using the measurements of voltages and currents at the substation; therefore this proposal considers all of the variations at pre-fault and fault time instants. Also, the strategy uses a refinement process to estimate the system load using an iterative algorithm which considers the distance to the fault calculated in the previous iterations. Then, the fault location is determined by the estimation of the distance from the substation to the fault point which is calculated using short circuit analysis in function of the phase parameters of distribution system. Finally, this strategy is validated in the IEEE 34 test feeder, which is composed for single-phase, two-phase and three-phase feeders and considering several fault resistances from 0Ω to 40Ω. According to the obtained results, the error presented is less than 1%.

Keywords : Faults location; impedance based methodology; power distribution systems; load's refinement; short-circuit analysis.

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