Zero-sequence current blocking device for two phase AC systems

Research output: Contribution to conferencePaperResearchpeer-review

Abstract

Resonantly grounded power systems require fault current limitation in order to meet current standards and to ensure personal safety. A current limiting transformer (CLT), based on an isolating transformer, is investigated here. The major advantages of a CLT, compared to an isolating transformer, are power derating, reduction of leakage reactance and thus reduced losses and reactive power demand during operation. MATLAB/Simulink® is used to investigate the electrical behavior of the CLT. Simulations of a phase-to-ground fault are made to proof the reduction of fault currents. Modelling the CLT in symmetric components demonstrates the blocking mechanism for the zero-sequence currents. In this context special attention has to be paid to resonant currents in resonantly grounded networks, when using the CLT.
Original languageEnglish
Number of pages4
DOIs
Publication statusPublished - 3 Sep 2019
Event54th International Universities Power Engineering Conference - Bucharest, Romania
Duration: 3 Sep 20196 Sep 2019
http://upec2019.com/

Conference

Conference54th International Universities Power Engineering Conference
Abbreviated titleUPEC 2019
CountryRomania
CityBucharest
Period3/09/196/09/19
Internet address

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Keywords

  • current limiters
  • fault currents
  • power systems
  • power transmission
  • transformers

Cite this

Polster, S. C., Albert, D., Renner, H., Schürhuber, R., Obkircher, C., & Rader, G. (2019). Zero-sequence current blocking device for two phase AC systems. Paper presented at 54th International Universities Power Engineering Conference , Bucharest, Romania. https://doi.org/10.1109/UPEC.2019.8893601