Method and apparatus for leakage monitoring for oil-immersed electrical transformers

Feng, Xianyong; Mousavi, Mirrasoul

Title: Method and apparatus for leakage monitoring for oil-immersed electrical transformers

Patent · Tue Jan 29 00:00:00 EST 2019

OSTI ID:1499125

Feng, Xianyong; Mousavi, Mirrasoul

The present invention comprises an apparatus and method for detecting a loss of oil from an oil-immersed transformer, based on fitting a transformer top-oil temperature model to online measurements in an iterative optimization process that yields fitted values for a first model parameter representing the top-oil temperature rise over ambient temperature and a second model parameter representing the oil time constant. Among the several advantages seen in the contemplated apparatus and method is the reduction in required instrumentation, whereby transformer oil leaks are indirectly detected without requiring pressure sensors or mechanical floats, although the presence of such sensors is not excluded by the teachings herein.

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Research Organization:: ABB Inc., Cary, NC (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: OE0000547

Assignee:: ABB Inc. (Cary, NC)

Patent Number(s):: 10,192,677

Application Number:: 14/457,768

OSTI ID:: 1499125

Resource Relation:: Patent File Date: 2014 Aug 12

Country of Publication:: United States

Language:: English

References (13)

System for monitoring and modeling operation of a transformer Tostrud, Mark D.; Stewart, Peter Graham; Ziegler, Ryan https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9419430 US Patent Document 9,419,430	patent	August 2016
A new method for the calculation of the hot-spot temperature in power transformers with onan cooling Radakovic, Z.; Feser, K. IEEE Transactions on Power Delivery, Vol. 18, Issue 4 https://doi.org/10.1109/TPWRD.2003.817740	journal	October 2003
Cooling system for power transformer Hoffman, Gary R.; Anderson, Jeffrey G. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8260472 US Patent Document 8,260,472	patent	September 2012
Dynamic Thermal Modelling of Power Transformers Susa, D.; Lehtonen, M.; Nordman, H. IEEE Transactions on Power Delivery, Vol. 20, Issue 1 https://doi.org/10.1109/TPWRD.2004.835255	journal	January 2005
A fundamental approach to transformer thermal modeling. I. Theory and equivalent circuit Swift, G.; Molinski, T. S.; Lehn, W. IEEE Transactions on Power Delivery, Vol. 16, Issue 2 https://doi.org/10.1109/61.915478	journal	April 2001
Predicting transformer temperature rise and loss of life in the presence of harmonic load currents Gouda, O. E.; Amer, G. M.; Salem, W. A. A. Ain Shams Engineering Journal, Vol. 3, Issue 2 https://doi.org/10.1016/j.asej.2012.01.003	journal	June 2012
Textured-surface quartz resonator fluid density and viscosity monitor Martin, Stephen J.; Wiczer, James J.; Cernosek, Richard W. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5798452 US Patent Document 5,798,452	patent	August 1998
A fundamental approach to transformer thermal modeling. II. Field verification Swift, G.; Molinski, T. S.; Bray, R. IEEE Transactions on Power Delivery, Vol. 16, Issue 2 https://doi.org/10.1109/61.915479	journal	April 2001
Temperature responses to step changes in the load current of power transformers Nordman, H.; Rafsback, N.; Susa, D. IEEE Transactions on Power Delivery, Vol. 18, Issue 4 https://doi.org/10.1109/TPWRD.2003.817516	journal	October 2003
Condition diagnosing Stenestam, Bengt-Olof https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6962435 US Patent Document 6,962,435	patent	November 2005
Tap changer condition diagnosing Stenestam, Bengt-Olof; Andersson, Gunnar https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7089145 US Patent Document 7,089,145	patent	August 2006
Control system for a transformer or reactor Stenestam, Bengt-Olof; Andersson, Gunnar https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7444266 US Patent Document 7,444,266	patent	October 2008
Tap changer monitoring Stenestam, Bengt-Olof; Andersson, Gunnar https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7145760 US Patent Document 7,145,760	patent	December 2006

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