- Title
- The influence of complex permeability on the broadband frequency response of a power transformer
- Creator
- Mitchell, Steven D.; Welsh, James S.
- Relation
- IEEE Transactions on Power Delivery Vol. 25, Issue 2, p. 803-813
- Publisher Link
- http://dx.doi.org/10.1109/TPWRD.2009.2036358
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2010
- Description
- This paper considers the effect of the complex permeability of a power transformer core on the frequency response analysis (FRA) test spectrum. Current work in FRA generally neglects the core beyond a few hundred kHz. This research demonstrates that the effective complex permeability is significant at 1 MHz and greater than unity at frequencies exceeding 15 MHz. The paper also shows that for broadband small signal testing, such as FRA, the low field conditions induced by the injected signal result in a relative permeability that approaches the initial permeability of the core. This ensures that the relative permeability remains approximately constant over a large range of frequencies and will have a degree of independence with respect to the amplitude of the injection voltage.
- Subject
- condition monitoring; FRA; frequency response; high voltage; model; permeability; transformer
- Identifier
- uon:9228
- Identifier
- http://hdl.handle.net/1959.13/920931
- Identifier
- ISSN:0885-8977
- Rights
- Copyright © 2010 IEEE. Reprinted from the IEEE Transactions on Power Material. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
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