Research on potential distribution in transformer with subsection and layer windings under VFTO

doi:10.11930/j.issn.1004-9649.2012.4.42.4

Electric Power ›› 2012, Vol. 45 ›› Issue (4): 42-46.DOI: 10.11930/j.issn.1004-9649.2012.4.42.4

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Research on potential distribution in transformer with subsection and layer windings under VFTO

DOU Yu-lei, JIANG Zhong-jie, WANG Ya-jun, XUE Zhi-ying

1. Meishan Company of Sichuan Electric Power Corporation, Meishan 620010,China;
2.Electric Power Dispatching Center of Hebei, Shijiazhuang 050019,China;
3. North China Electric Power University, Beijing 102206, China

Received:2011-11-06 Revised:2012-01-25 Online:2012-04-18 Published:2016-02-29

Abstract

Abstract: It is very important for transformer insulation design to calculate winding potential distribution of the transformer with subsection and layer winding under VFTO (Very Fast Transient Over-voltage). VFTO generated by GIS switchgear switching is very harmful to transformer insulation. In order to accurately simulate the very fast transient process in the winding, a lumped parameter model with single layer winding unit is proposed. Physical model and math formula for the calculation of inductance, capacitance and resistance parameters are introduced. The consistency between simulation and measurement results in an actual transformer winding verifies the correctness of proposed model, which provides theoretical basis for transformer winding insulation design.

Key words: very fast transient over-voltage（VFTO）, transformer with subsection and layer winding, lumped parameter model, potential distribution

CLC Number:

TM406

DOU Yu-lei, JIANG Zhong-jie, WANG Ya-jun, XUE Zhi-ying. Research on potential distribution in transformer with subsection and layer windings under VFTO[J]. Electric Power, 2012, 45(4): 42-46.

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Research on potential distribution in transformer with subsection and layer windings under VFTO

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