Analysis of partial discharge pulse distribution along transformer windings using digital filtering techniques

Access Full Text

Analysis of partial discharge pulse distribution along transformer windings using digital filtering techniques

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Add to cart
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)
Add to cart

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IEE Proceedings C (Generation, Transmission and Distribution) — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

© The Institution of Electrical Engineers
Published

The capacitive network often used for the calculation of initial voltage distribution along a transformer winding can be in error for steep impulses. As such pulses are produced by partial discharges (PDs) the application of the concept could contribute to inaccuracies in methods developed for the location of PDs in windings. By means of theoretical analyses, together with experimental measurements on several disc-type windings, it has been found that a capacitive ladder network can be a good representation within a certain frequency limit, the latter being related to the particular winding. Terminal measurements, involving both impulse response and sinusoidal voltage methods, and digital filtering techniques, were employed to determine the appropriate frequencies. Results are presented for tests on 66 kV and 132 kV interleaved windings and a conventional 66 kV winding. For the interleaved windings greatly improved accuracies with steep pulses were achieved, compared with normal impulse voltage distribution measurements. An explanation of the differences between the winding characteristics is given through analysis of the behaviour of two hypothetical double-disc coils (interleaved and conventional), allowing for capacitive intercoupling and series inductance. It is concluded that the studies described will assist in the long-term development of more accurate electrical PD location systems.

Inspec keywords: power transformers; transformer windings; transformer testing; fault location; partial discharges

Other keywords: digital filtering; 66 kV; transformer windings; impulses; partial discharge; development; fault location; power transformers; 132 kV; pulse distribution; capacitive network

Subjects: Testing; Transformers and reactors; Production facilities and engineering; Manufacturing processes; Power system measurement and metering

References

    1. 1)
      • R.E. James , B.T. Phung , Q. Su . Application of digital filtering techniques to the determination of partial discharge location in transformers. IEEE Trans. Electr. Ins. , 4 , 657 - 668
    2. 2)
      • F.J. Harris . On the use of windows for harmonic analysis with the discrete Fourier transform. Proc. IEEE (USA) , 1 , 51 - 83
    3. 3)
      • L.M. Burrage , E.F. Veverka , B.M. McConnell . Steep front short duration low voltage impulse performance of distribution transformers. IEEE Trans. Power Delivery , 4 , 1152 - 1156
    4. 4)
      • Su, Q., James, R.E.: `Examination of partial discharge propagation in hydro-generator stator windings using digital signal processing techniques', Universities Power Engineering Conference, December 1991, , p. 18–20.
    5. 5)
      • K.W. Wagner . The progress of an electromagnetic wave in a coil with capacity between turns. Electrotechnik und Maschinenbau , 89 - 107
    6. 6)
      • T.J. Lewis . The transient behaviour of ladder networks of the type representing transformer and machine windings. Proc. IEE , 2 , 541 - 553
    7. 7)
      • A. Mazur , I. Kerszenbaum , J. Frank . Maximum insulation stresses under transient voltage in the HV barrel-type winding of distribution and power transformers. IEEE Trans. Industr. Applic. , 3 , 427 - 433
    8. 8)
      • L.F. Blume , A. Boyajian . Abnormal voltages within transformers. Trans. AIEE , 577 - 614
    9. 9)
      • G.M. Stern . A study of the initial surge distribution in concentric transformer windings. IEEE Trans. , 877 - 893
    10. 10)
      • L.V. Bewley . (1963) , Travelling waves on transmission systems.
    11. 11)
      • P.I. Fergestad , T. Henriksen . Inductances for the calculation of transient oscillations in transformers. IEEE Trans. , 510 - 517
    12. 12)
      • B. Heller , A. Veverka . (1968) , Surge phenomena in electrical machines.
    13. 13)
      • R. Rudenburg . Performance of travelling waves in coils and windings. Trans. AIEE
    14. 14)
      • R.E. James , J. Austin , P. Marshall . Application of a capacitive network winding representation to the location of partial discharge in transformers. Trans. IE Australia , 2 , 95 - 103
    15. 15)
      • G.H. Vaillancourt , R. Malewski , D. Train . Comparison of three techniques of partial discharge measurements in power transformers. IEEE Trans. , 4 , 900 - 909
    16. 16)
      • J. Austin , R.E. James . (1970) Location of partial discharges in interleaved disk windings, Dielectric Materials, Measurement and Applications.
    17. 17)
      • Su, Q.: `Detection and location of partial discharges in transformer and generator windings using electrical method', November 1989, PhD thesis, University of New South Wales, Australia.
    18. 18)
      • R.E. James . Discharge detection in high-voltage power transformers. Proc. IEE , 7 , 1352 - 1362
http://iet.metastore.ingenta.com/content/journals/10.1049/ip-c.1992.0057
Loading

Related content

content/journals/10.1049/ip-c.1992.0057
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading