Process for identifying abnormalities in power transformers

Details Process for identifying abnormalities in power transformers Process for identifying abnormalities in power transformers

2005-03-22

2005-03-22

Deb, Anjan K. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S520000, C702S058000

Reexamination Certificate

active

06870374

ABSTRACT:
A preferred method for identifying a type of abnormality in an insulation system of a power transformer comprises measuring dielectric losses in a section of the insulation system, calculating theoretical dielectric losses for the section based on the material properties, geometry, and temperature of the section, and generating a graphical representation of a percent difference between the measured and calculated dielectric losses. The preferred method also comprises comparing a shape of the graphical representation with a shape of one or more graphical representations of a percent difference between measured and theoretical dielectric losses in one or more other sections of insulation each known to have a specific type of abnormality.

REFERENCES:
patent: 4757263 (1988-07-01), Cummings et al.
patent: 5214595 (1993-05-01), Ozawa et al.
patent: 5450315 (1995-09-01), Stefanski
patent: 5640154 (1997-06-01), Meyer et al.
patent: 5656767 (1997-08-01), Garvey, III et al.
patent: 5754055 (1998-05-01), McAdoo et al.
patent: 5869973 (1999-02-01), Nosov
patent: 5982181 (1999-11-01), Rokunohe et al.
patent: 6064172 (2000-05-01), Kuznetsov
patent: 6088658 (2000-07-01), Yazici et al.
patent: 6192317 (2001-02-01), Yazici et al.
patent: 0 427 551 (1991-05-01), None
Zheng et al. (Power Engineering Society Summer Meeting, 2002 IEEE, vol.: 1, Jul. 21-25, 2002 pp.:417-421 vol. 1).*
van Bolhuis, J.P.; Gulski, E.; Smit, J.J, (Monitoring and diagnostic of transformer solid insulation; Power Delivery, IEEE Transactions on , vol.: 17, Issue: 2, Apr. 2002 pp.: 528-536).*
Perkins et al. (Dielectric Frequency Response Measurement as a Tool for Trouble Shooting Insulation Power Factor Problems: 2002 International Symposium on Electrical insulation: Apr. 7-10, 2002).*
Gavert et al. (Modelling of Dielectric Measurements on Power Transformers. Cigre Session Paris, Sep. 1998).*
Frimpong et al. (Estimation of Moisture in Cellulose and Oil Quality of Transformer Insulation Using Dielectric Response Measurements: 2001 Conference Doble clients Apr. 1-6, Boston Massachusetts).*
Perkins, Mark, et al., Dielectric Frequency Response Measurement as a Tool For Troubleshotting Insulation Power Factor Problems, 2002 International Symposium on Electrical Insulation (Apr. 7-10. 2002).
Frimpong, George, K., “Estimation of Moisture in Cellulose and Oil quality of Transformer Insulation Using Dielectric Response Measurements,” 2001 Conference of Doble Clients [Apr. 1-Apr. 6, 2001, Boston Massachusetts].
U. Gafvert, et al., “Modelling of Dielectric Measurements On Power Transformers,” Paper 15-103, CIGRE Session Paris, Sep. 1998.
Boss, P., “Life Assessment of Power Transformers to Prepare a Rehabilitation Based on a Technical-Economical Analysis,” CIGRE Session, Paris 2002 [Aug. 25-Aug. 30, 2002].

Affiliated with

Also associated with

Rating

Process for identifying abnormalities in power transformers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for identifying abnormalities in power transformers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for identifying abnormalities in power transformers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389344