Print Email Facebook Twitter Eliminating VT uncertainties in modeling ferroresonance phenomena caused by single phase-to-ground faults in isolated neutral network Title Eliminating VT uncertainties in modeling ferroresonance phenomena caused by single phase-to-ground faults in isolated neutral network Author Zirka, S.E. (Dnipro National University) Moroz, Y.I. (Dnipro National University) Zhuykov, A.V. (National Research University “Moscow Power Engineering Institute”) Matveev, D.A. (National Research University “Moscow Power Engineering Institute”) Kubatkin, M.A. (National Research University “Moscow Power Engineering Institute”) Frolov, M.V. (National Research University “Moscow Power Engineering Institute”) Popov, M. (TU Delft Intelligent Electrical Power Grids) Date 2021 Abstract It is commonly recognized that correct transformer model (particularly topological one) is a key element for any ferroresonance simulations. This paper represents a line of reasoning by which a reliable model of a voltage transformer (VT) can be constructed given substantial uncertainties in its parameters and characteristics. Starting with catalog data for electric steels and typical leakage inductances of 6-kV VTs, a model of an isolated neutral network with three inductive VTs is initially fitted to reproduce in detail its ferroresonant behavior for a chosen network capacitance. Then, validity of the network model is verified by accurate predictions of ferroresonance processes for all other capacitance values available and thus different ferroresonance modes recorded during full-scale factory tests. Possibilities to simplify the VT model by neglecting dynamic, and then entire core losses and hysteresis are also shown. Subject Ferroresonance phenomenaModelingModesVoltage transformer To reference this document use: http://resolver.tudelft.nl/uuid:96746b2e-1c46-498a-8415-dd3c60c24bf8 DOI https://doi.org/10.1016/j.ijepes.2021.107275 ISSN 0142-0615 Source International Journal of Electrical Power & Energy Systems, 133, 1-12 Part of collection Institutional Repository Document type journal article Rights © 2021 S.E. Zirka, Y.I. Moroz, A.V. Zhuykov, D.A. Matveev, M.A. Kubatkin, M.V. Frolov, M. Popov Files PDF 1_s2.0_S0142061521005147_main.pdf 9.5 MB Close viewer /islandora/object/uuid:96746b2e-1c46-498a-8415-dd3c60c24bf8/datastream/OBJ/view