Mathematical Modeling and Simulation of Flow Field of Switching Process of On-Load Tap Changer for Large Capacity Transformer
ID:102 View Protection:ATTENDEE Updated Time:2020-11-11 12:09:37 Hits:60 Poster Presentation

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During the switching of the on-load tap changer (OLTC) of the transformer, an arc is generated which causes insulating oil to vaporize and decompose, resulting in a surge of insulating oil inside the OLTC tank. As the capacity of transformer increases, the oil surge is very severe due to the large arc current during the switching process, which leads to frequent gas protection misoperations. Therefore, it is necessary to analyze the flow field during the OLTC switching process. Based on the physical process of OLTC switching, the switching process is divided into two stages for mathematical modeling, namely the bubble expansion stage and the gas-liquid two-phase flow stage. Finally, using the Comsol Multiphysics software for modeling and simulation, and the oil flow characteristics of the two stages in the connecting pipe of oil conservator were analyzed.
transformer, on-load tap changer, two-phase flow,flow field,bubble expansion
Jianan Si
Xi’an Jiaotong University

Submission Author
Jianan Si Xi’an Jiaotong University
Zhiguo Hao Xi’an Jiaotong University
Ya Zhang Xi’an Jiaotong University
Shaoyong Yao Xi’an Jiaotong University
Guocheng Ding State Grid Anhui Electric Power Co., LTD.
Xingwang Wu State Grid Anhui Electric Power Co., LTD.
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  • Conference Date

    Oct 21



    Oct 24


  • Oct 13 2019

    Abstract Notification of Acceptance

  • Oct 13 2019

    Draft paper submission deadline

  • Oct 14 2019

    Draft Paper Acceptance Notification

  • Oct 29 2019

    Final Paper Deadline

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Xi'an Jiaotong University
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