Study on the influence of arc on oil flow rate during switching process of large capacity transformer on-load tap-changer
Study on the influence of arc on oil flow rate during switching process of large capacity transformer on-load tap-changer
- Author(s): X. Wu 1 ; H. Yang 1 ; R. Yin 1 ; G. Ding 1 ; C. Zhang 1 ; J. Wu 1
- DOI: 10.1049/icp.2020.0094
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- Author(s): X. Wu 1 ; H. Yang 1 ; R. Yin 1 ; G. Ding 1 ; C. Zhang 1 ; J. Wu 1
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View affiliations
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Affiliations:
1:
State Grid Anhui Electric Power Co.,ltd. Electric Power Research Institute , Hefei 230601, Anhui Province , China
Source:
The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020),
2021
p.
1276 – 1279
-
Affiliations:
1:
State Grid Anhui Electric Power Co.,ltd. Electric Power Research Institute , Hefei 230601, Anhui Province , China
- Conference: The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020)
- DOI: 10.1049/icp.2020.0094
- ISBN: 978-1-83953-330-3
- Location: Online Conference
- Conference date: 02-03 July 2020
- Format: PDF
The on-load tap-changer is an important device in the power grid to adjust the load flow and improve the reactive power distribution, which is directly related to the safe and stable operation of the power system. At present, it is urgent to carry out relevant research on the mechanism of oil flow surge and on-load misoperation caused by arc energy during normal switching of on-load switches of high voltage and large capacity transformers. Based on the calculation method of oil flow rate during the normal switching process of transformer on-load tap-changer, the theoretical limit of oil flow rate is obtained by analyzing and calculating the arc energy. Taking the CMIII 1000 on-load tap-changer as an example, the finite element analysis model of the oil flow rate during the switching process of the on-load tap-changer is established. The theoretical limit value of oil flow rate is obtained, which is verified by comparison with the theoretical calculation results. The above research can provide a certain engineering reference value for improving the reliability of the non-electricity protection action of the oil flow control relay.
Inspec keywords: flow control; transformer oil; finite element analysis; on load tap changers; power grids
Subjects: Transformers and reactors; Finite element analysis; Organic insulation