Study on the Difference of Multi-parameter Characteristics of Oil-immersed Transformer under Internal Discharge and External Disturbance

Transformer is the core equipment of power system. It is a hot research topic to monitor the transformer operation status and construct protection strategies by means of high frequency pulse current (HFPC), ultrahigh frequency (UHF) signal and acoustic signal (AE). However, the above signals are sus...

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Bibliographic Details
Published in2023 IEEE International Conference on Power Science and Technology (ICPST) pp. 340 - 344
Main Authors Jun, Lai, Jiangyang, Zhan, Junhui, Xiong, Xinwei, Wang, Xiao, Wang, Gaoming, Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 05.05.2023
Subjects
Discharges (electric)
external disturbance
Frequency-domain analysis
internal discharge
Lightning
multi-parameter
Oil insulation
oil-immersed transformer
Power transformers
Synchronization
Transformer cores
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DOI10.1109/ICPST56889.2023.10165025

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Summary:Transformer is the core equipment of power system. It is a hot research topic to monitor the transformer operation status and construct protection strategies by means of high frequency pulse current (HFPC), ultrahigh frequency (UHF) signal and acoustic signal (AE). However, the above signals are susceptible to external disturbance of the transformer at the same time. The above multi-parameter characteristics of oil-immersed transformer under internal discharge and external disturbance are analyzed through experiments in this paper. It is found that HFPC and UHF signals of internal discharge have stronger synchronization than external disturbance, and the main frequency of AE signal is higher.
DOI:10.1109/ICPST56889.2023.10165025