Innovative Differential Protection of Power Transformers Using Low-Energy Current Sensors

@article{Kojovic2009InnovativeDP,
  title={Innovative Differential Protection of Power Transformers Using Low-Energy Current Sensors},
  author={Ljubomir A. Kojovic and Martin T. Bishop and Dharam Sharma},
  journal={IEEE Transactions on Industry Applications},
  year={2009},
  volume={49},
  pages={1971-1978}
}
Traditional differential protection systems are applied on large power transformers using current transformers (CTs). However, because of high secondary currents (often exceeding 100 kARMS), differential protection systems for electric arc furnace transformers have not been applied in the past due to the lack of commercially available CTs. This paper will present differential protection systems that have been in use for many years using Rogowski coil current sensors. These protection systems… CONTINUE READING

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Rogowski coil performance characteristics for advanced relay protection

Lj. A. Kojovic
Proc. 9th Int. Conf. DPSP, Glasgow, U.K., Mar. 17–20, 2008, pp. 406–411. • 2008