Original scientific paper

Study on transient voltage distribution characteristics of transformer windings

Zang Ying, ; SPECO
Xu Tao ; SPECO
Xie Yu ; SPECO
Xu Jianwen ; SPECO

Abstract

Very fast transient overvoltage (VFTO) with large waveform steepness and high amplitude can cause great harm to winding insulation of transformers and other equipment connected to it. Therefore, a transformer winding model is designed and described in this paper. Transient overvoltage test is carried out by pinning method and
non-contact measuring sensor respectively. Then the simulation results
are compared with those of VFTO distribution calculation program for
transformer equipment. The results show that the simulation results are
close to the actual test results. Finally, combining with the experimental
measurement and simulation data, the potential distribution in transformer windings under the effect of fast transient overvoltage is analysed to guide the overvoltage protection of transformer
winding insulation.

Keywords

very fast transient overvoltage; transformer winding; non-contact measuring sensor; measurements; simulation; voltage distribution

Hrčak ID:

236751

URI

https://hrcak.srce.hr/236751

Publication date:

8.4.2020.

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