Transcript History and purpose

Why test
REASON 1
• 40% PROBLEMS IN TRANSFORMERS
OLTC
REASON 2
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HQ study showed 12% require
maintenance before manufacturer’s
suggested period.
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Presentation on OLTC diagnostics, Laurent Allard, ABB
Secheron, Euro TechCon Chester UK 2010
REASON 3
• About one in 20 OLTC failures lead to
transformer main tank failure
• [western electricity coordinating council]
• WECC Substation WG meeting minutes,
Vancouver Washington, May 2006
REASON 4
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About 33% of OLTC failures are caused
by incorrect maintenance and bad
reassembly.
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P.Kang, D. Birthwistle, et al. "Non invasive on line condition
monitoring of OLTC", IEEE proceedings January 2000,
Generation, transmission and distribution, Volume 3, pp.22232228
History of DRM
• First proposal 1994
• First results published 1999-2000
Our experience (10 years)
• Hall probes and scope
• Modern electronic instruments + lap-top
Today
• Working group formed in Dublin 2010
Working Group – Madrid 2011
Workshop – field testing
WG meeting Stockholm 2012
WG Participants
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ESBI Ireland
Liandon The Netherlands
ARCE Spain
Gas Natural Spain
EAC Cyprus
Terna Italy
ELIA Belgium
MHY Pro Power Malaysia
Elektroprenos Bosnia
EDF France
Siemens Germany
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ONE Nordic Sweden
DV Power Sweden
MR - Reinhousen
Doble PowerTest UK
Omicron Austria
Seitz Instruments
Switzerland
PG&E USA
ABB
Stevo Electric
Megger
Technology
• In 1999 old technology with scope
• In 2004 computer recording
– RS232 communication
• In 2009 high speed recording
– USB communication
• In 2011 demagnetization
• In 2012 three phase recording
Hall effect probe and scope
Old instrument
New instrument
References
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DYNAMIC RESISTANCE MEASUREMENTS IN LOAD TAP CHANGER - Luis Miguel Perea. Angel Ramos
Gómez Unión Fenosa Distribución, Spain, José Luis Lozano Gómez Norcontrol Soluziona, Spain
A DIAGNOSTIC TO DETERMINE THE CONDITION OF THE CONTACTS OF LOAD TAP CHANGERS IN A
POWER TRANSFORMER H.F.A. Verhaart and Andre E. Lux, KEMA T &D Consulting, 2004 at Doble conf.
Advanced on-site diagnosis of transformer on-load tap changer, Jur J. Erbrink1, Edward Gulski1, Paul P.
Seitz2, Rory Leich3; 1Delft University of Technology, The Netherlands; 2Seitz Instruments AG, Switzerland;
3Nuon Tecno, The Netherlands, IEEE INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATION 8 - 11
June 2008 Vancouver, BC, Canada
EXPERIMENTAL MODEL FOR DIAGNOSING ON-LOAD TAP CHANGER CONTACT AGING WITH
DYNAMIC RESISTANCE MEASUREMENTS, Jur J. Erbrink2, Edward Gulski1, Johan Smit1, Rory Leich3;
1Delft University of Technology, The Netherlands; 2Seitz Instruments AG, Switzerland; 3Liandon, The
Netherlands, Cired 2009 paper 0134
On Load Tap Changer Dynamic Resistance Measurement, By Raka Levi, Alex Cincar, Keith Bensley,
published in Australia at TechCon 2010
Experience on Dynamic Contact Resistance Test on Eroded and Worn-Out Tap-Changer Contacts, R.
Samsudin, Yogendra, TNB Research Sdn Bhd; A.Berhanuddin, Y.Zaidey, Tenaga Nasional Berhad; M.Haneef,
MHY Pro-Power Services Sdn Bhd - published 2010 in Malaysia
Interpretation of Dynamic Resistance Results of On-Load Tap Changers; J.J. Erbrink1, E. Gulski1, J.J. Smit1,
R. Leich2, P.P. Seitz3 and B. Quak3 1 Delft University of Technology, Delft, the Netherlands 2 Liandon,
Alkmaar, the Netherlands 3 Seitz Instruments AG, Niederrohrdorf, Switzerland published Japan 2010
Reproducibility of Dynamic Resistance Measurement Results of On-Load Tap Changers – Effect of Test
Parameters; J.J. Erbrink1*, E. Gulski1, J.J. Smit1, R. Leich2, P.P. Seitz3 and B. Quak3 1 Delft University of
Technology, Delft, the Netherlands 2 Liandon, Alkmaar, the Netherlands 3 Seitz Instruments AG,
Niederrohrdorf, Switzerland - Japan 2010
Condition Assessment of OLTC using static and dynamic resistance tests; Brendan Diggin, ESBI, presented
at the AMforum FORUM Dublin 2010
Doctoral thesis: OLTC Diagnosis on High Voltage Power Transformers using Dynamic Resistance
Measurements, Jur Erbrink, Technische Universiteit Delft, 28. March 2011
The end
http://amforum.org/site/drm.htm