Electromechanical Joint Analysis for Switching Procedure of Vacuum On-Load Tap Changer in UHV Converter Transformer

Liang He; Jiangang Bi; Dengwei Ding; Yufeng Chen; Yuan Xu; Yanpeng Gong; Weidong Liu

doi:10.17775/CSEEJPES.2023.09080

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Electromechanical Joint Analysis for Switching Procedure of Vacuum On-Load Tap Changer in UHV Converter Transformer

Regular Papers | 更新时间：2026-10-16

- Electromechanical Joint Analysis for Switching Procedure of Vacuum On-Load Tap Changer in UHV Converter Transformer
- CSEE Journal of Power and Energy Systems Vol. 11, Issue 5, Pages: 2477-2486(2025)
- 作者机构：
  
  1. Sichuan Energy Internet Research Institute, Tsinghua University,Chengdu,China
  2. China Electric Power Research Institute,Beijing,China
  3. Shandong Electric Power Research Institute,Jinan,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2023.09080
  CLC：
- Published：01 September 2025
- 稿件说明：
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Liang He, Jiangang Bi, Dengwei Ding, et al. Electromechanical Joint Analysis for Switching Procedure of Vacuum On-Load Tap Changer in UHV Converter Transformer[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2477-2486.
DOI：

Liang He, Jiangang Bi, Dengwei Ding, et al. Electromechanical Joint Analysis for Switching Procedure of Vacuum On-Load Tap Changer in UHV Converter Transformer[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2477-2486. DOI： 10.17775/CSEEJPES.2023.09080.

摘要

Abstract

As one of the key components of a UHV converter transformer

the suitable switching condition of the vacuum on-load tap changer (OLTC) is essential for the stability of the power system. It is highly desirable to interpret OLTC's switching procedure to assess OLTC's switching condition. However

such work can't be solved by vibration analysis alone. Therefore

this paper proposes an innovative electromechanical comprehensive analysis method. First

a joint motor drive current

vibration

and electromagnetic signals online monitoring system is established and deployed in a VRG type OLTC in ±800 kV converter station. Second

independent component analysis (ICA)

dynamic time warping (DTW)

and wavelet transform (WT) are used for processing motor current

UHFCT

and vibration signals

respectively

to extract electromechanical pulses corresponding to OLTC's contact actions. Third

the switching procedure of OLTC is revealed by comprehensively analyzing the corresponding time relationship between these extracted pulses

combined with OLTC's timing sequence. The methodologies developed in this paper can help to interpret OLTC's switching procedure for deeper and finer online condition assessment.

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Related Institution

Department of Electrical Engineering, Harbin Institute of Technology

School of Electrical Engineering and Automation, Harbin Institute of Technology (HIT)

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