Advanced on-site diagnosis of transformer on-load tap changer

被引：21

作者：

Erbrink, Jur J. ^{[1
]}

Gulski, Edward ^{[1
]}

Seitz, Paul P. ^{[2
]}

Leich, Rory ^{[3
]}

机构：

[1] Delft Univ Technol, NL-2600 AA Delft, Netherlands

[2] Seitz Instruments AG, Niederrohrdorf, Switzerland

[3] Nuon Tecno, Arnhem, Netherlands

来源：

CONFERENCE RECORD OF THE 2008 IEEE INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATION, VOLS 1 AND 2 | 2008年

关键词：

automatic test equipment; contact resistance; dynamic response; power transformers; resistance measurement; transformer windings;

D O I：

10.1109/ELINSL.2008.4570322

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

It is known that many failures of power transformers are related to aging effects of the on-load tap changer contacts. This paper discusses the recently developed analysis method for service aged power transformers. In particular, the effect of several aging stages of the tap changer change-over selector contacts on dynamic resistance have been considered. As a result, to assess on-site the condition of a power transformer, the following approaches are combined: The velocity measurement to the driving axis of the tap changer drive mechanism and the motor power measurement on the drive motor of the tap changer, to detect mechanical wear or damage inside the drive mechanism; Transformer turns ratio measurement and DC winding resistance measurement, to diagnose the transformer windings. This paper also presents decision support rules for dynamic resistance measurements to make an unambiguous decision about the status of the tap changer contacts.

引用

页码：252 / +

页数：2

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