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Influence Factors of Acoustic Fingerprint Detection of M-Type On-Load Tap Changer
编号：631 访问权限：仅限参会人 更新：2022-05-23 17:26:39 浏览：272次 张贴报告

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摘要
The on-load tap changer is a device which can operate under the excitation or load state of transformer and is used to change the tap connection position of winding. The mechanical fault accounts for nearly 90% of the on-load tap changer fault, so it is necessary to detect the mechanical fault of on load tap changer. In this paper, M-type 220kV transfer switch and voltage output accelerometer are selected, the tap changer is placed in a 1.98m high and 1m diameter oil tank. The acoustic fingerprint data of 108 repeated tests are statistically analyzed. The influence of sensor sensitivity, coupling method and installation location on acoustic fingerprint and short-time energy method spectrum is summarized. The results show that in OLTC acoustic fingerprints testing, under the appropriate display range, the higher the sensor sensitivity, the more obvious difference between peak and valley of the short-time energy spectrum. Combined with the convenience and feasibility of on-site measurement viscous connection should be used on the OLTCs in operation, and magnetic connection should be used in some special cases. As for newly-bought OLTCs, setting rigid connection hole can be better option. The installation position should remain the same within the same test, mostly at upper or middle parts of OLTCs.
 
关键词
On-load tap changer; Typical mechanical failure; Short time energy method; Fault diagnosis
报告人
姜金鹏
中国电力科学研究院有限公司

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重要日期

  • 会议日期

    05月27日

    2022

    至

    05月29日

    2022

  • 02月28日 2022

    初稿截稿日期

  • 05月29日 2022

    注册截止日期

  • 06月22日 2022

    报告提交截止日期

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IEEE Beijing Section
China Electrotechnical Society
Southeast University
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IEEE Industry Applications Society
IEEE Nanjing Section
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