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Transient Characteristics and Sites of Pre-Breakdown in Spark Conditioning for High-voltage Vacuum Interrupter under Power Frequency Voltage
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  • Hui Ma,
  • Yu Du,
  • Jingyu Shen,
  • Yuanzhao Li,
  • Yulong Gao,
  • Zhiyuan Liu,
  • Jianhua Wang,
  • Yingsan Geng
Hui Ma
Xi'an Jiaotong University

Corresponding Author:mahui0609@163.com

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Yu Du
Xi'an Jiaotong University
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Jingyu Shen
Xi'an Jiaotong University
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Yuanzhao Li
Xi'an Jiaotong University
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Yulong Gao
Xi'an Jiaotong University
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Zhiyuan Liu
Xi'an Jiaotong University
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Jianhua Wang
Xi'an Jiaotong University
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Yingsan Geng
Xi'an Jiaotong University
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Abstract

The objective of this paper is to determine the transient characteristics and sites of the pre-breakdown (pre-BD) in the spark conditioning under power frequency voltage (PFV) in vacuum. A multi-angle optical path system was built to record the arc of pre-BD at two viewing angles by one camera, realizing the determination of the pre-BD sites in spark conditioning. The recording rate of high-speed camera was 580,000 frames/s. The experimental results indicate that, in the spark conditioning under PFV, the pre-BDs continuously occurred at a random moment. Within several half-waves, the number of the pre-BDs could reach dozens of times, which was the key for the treatment of the electrode surface in conditioning. Under the application of PFV, the single pre-BD occurred at a random moment, in which would last for several microseconds and the peak value of the current would reach several amperes. Moreover, the pre-BD sites randomly distributed in the surface of the electrode and almost covered the whole surface of the electrode. The number of the pre-BDs in edge region of the electrode tent to be more. The pre-BDs took place independently in both time and space.
07 May 2023Submitted to IET Generation, Transmission & Distribution
09 May 2023Submission Checks Completed
09 May 2023Assigned to Editor
11 Aug 2023Reviewer(s) Assigned
13 Sep 2023Review(s) Completed, Editorial Evaluation Pending
20 Sep 2023Editorial Decision: Revise Major
17 Oct 20231st Revision Received
19 Oct 2023Submission Checks Completed
19 Oct 2023Assigned to Editor
19 Oct 2023Review(s) Completed, Editorial Evaluation Pending
19 Oct 2023Reviewer(s) Assigned
30 Oct 2023Editorial Decision: Accept