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Influence of electrostatic shielding of disc winding on increasing the series capacitance in transformer

Bagheri, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1109/PCT.2007.4538586
  3. Publisher: 2007
  4. Abstract:
  5. Strike of a lightning stroke to the high voltage terminal of a power transformer results in an impulse stress on its windings. The magnitude of the series capacitance of the windings has an important effect on the impulse voltage distribution and the stresses along the windings. Increasing the series capacitances of the windings, the impulse voltage distribution becomes more linear and the stress on the winding is reduced. So interleaved windings rather than disc windings are used in power transformer windings to increase the series capacitances. In this paper, the electrostatic shielding, used in disc windings to increase the windings series capacitance, and for linearization of its impulse voltage distribution is introduced and its impact on the modification of impulse voltage distribution is compared with the disc winding without shielding. ©2007 IEEE
  6. Keywords:
  7. Capacitance ; Electric instrument transformers ; Electrostatics ; Lightning ; Power transformers ; Shielding ; Transformer substations ; Voltage distribution measurement ; Voltage dividers ; Winding ; Disc winding ; Electrostatic shield ; Impulse voltage distribution ; Impulse voltages ; Transformer windings
  8. Source: 2007 IEEE Lausanne POWERTECH, Lausanne, 1 July 2007 through 5 July 2007 ; 2007 , Pages 1780-1784 ; 9781424421909 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/4538586