A semiconductor H-bridge connection to avoid saturation in current transformers for differential protection

Arboleya, Pablo; Coto, Manuel; González-Morán, Cristina; Reigosa, David

doi:10.1016/j.epsr.2011.10.011

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…During an internal fault in a power transformer, the primary winding currents are not reproduced in secondary winding because of the internal current derivation. In addition, this scenario may arise under healthy condition operation when given a set of particular situations [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Power transformer protection based on decision tree approach

Özgönenel

Karagöl

2014

IET Electric Power Applications

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This study introduces the concept of decision tree (DT) classification, a new approach to power transformer differential protection. The proposed technique is based on processing the differential current. The suggested method detects winding insulation failures and distinguishes them from magnetising inrush and sympathetic inrush conditions with classification accuracies of 100% for simulations and 95% for real-time studies. The internal faults can be accurately recognised from inrush current conditions in a few sampling cycle after the occurrence of a disturbance. Another advantage of the proposed method is that the fault detection algorithm does not depend on the selection of thresholds. Performance analysis of the DT is achieved by the simulation of different faults and switching conditions on a power transformer in power system computer aided design/electromagnetic transients including DC (PSCAD/EMTDC). Furthermore, the proposed method is also tested in laboratory environment. The accuracy of DT is also compared with support vector machine. Both experimental and simulation results are presented and discussed.

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Section: Introductionmentioning

confidence: 99%