dc.contributor.author | Gustavsen, Bjørn | |
dc.contributor.author | Longva, Kårstein | |
dc.date.accessioned | 2021-07-07T13:13:48Z | |
dc.date.available | 2021-07-07T13:13:48Z | |
dc.date.created | 2020-10-01T10:11:25Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 0885-8977 | |
dc.identifier.uri | https://hdl.handle.net/11250/2763806 | |
dc.description.abstract | Lightning strokes is a main source of transformer failures in distribution systems. The discharge of a lightning current through a distribution transformer's high-voltage (HV) side arresters leads to a ground potential rise of the transformer tank. In the case of a wye-wye connected transformer with ungrounded HV neutral point, the ground potential rise can drive a current through the low-voltage (LV) side windings that leads to an excessive voltage in the HV side neutral point by inductive transformation. Simulations by a measurement-based model demonstrate that a voltage several times the lightning impulse test voltage can arise in the neutral point, in the case of a close lightning strike to the HV side overhead line. The use of transformer LV side surge arresters in combination with proper grounding on the HV-side are effective ways of reducing the neutral point overvoltage. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | IEEE | en_US |
dc.title | Neutral Point Overvoltages in Wye-Wye Connected Distribution Transformer Caused by Lightning Current in Low-Voltage Winding | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.source.journal | IEEE Transactions on Power Delivery | en_US |
dc.identifier.doi | 10.1109/TPWRD.2020.3027960 | |
dc.identifier.cristin | 1836014 | |
dc.relation.project | Norges forskningsråd: 269303 | en_US |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |