Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables: An Empirical Study with Defects at Semicon-Dielectric Interface

Aditya Shekhar, Xianyong Feng, Angelo Gattozzi, Robert E. Hebner, Douglas Wardell, Shannon Strank, A. R. Mor, Laura Ramirez Elizondo, Pavol Bauer

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
25 Downloads (Pure)

Abstract

A scientific consensus is emerging on the benefits of direct current (DC) distribution in medium voltage (MV) power systems of ships and cities. At least 50% space savings and increased power transfer capacity are estimated with enhanced voltage DC operation of electric cables. The goal of this research is to contribute to developing the empirical knowledge on the insulation performance in order to validate the feasibility of such anticipated gains of DC versus alternating current (AC), and to determine the comparative impact of different operational conditions from a component engineering point of view. The partial discharge (PD) activity in cables is measured under AC and DC conditions as an indicator of insulation performance. Specifically, PDs in defects at the semicon-insulation interface are studied in terms of inception voltage, repetition rate and discharge magnitude. Empirical understanding is drawn for operating voltage and frequency dependence of the discharge behavior in such voids in the range of 10 to 20 kV and 0 to 0.1 Hz, respectively. The change in PD activity with void evolution post temperature-induced ageing process is explored
Original languageEnglish
Article number1968
Pages (from-to)1-18
JournalEnergies
Volume10
Issue number12
DOIs
Publication statusPublished - 26 Nov 2017

Keywords

  • AC
  • comparison
  • DC
  • discharges
  • measurements
  • medium voltage
  • PD
  • partial discharges
  • OA-Fund TU Delft

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