A neodymium hybrid fault current limiter

Jay R. Prigmore, Jorge A. Mendoza, George G. Karady

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Summary This paper presents a new hybrid type fault current limiter topology for use in distribution systems. The proposed system includes a fast mechanical contact switch, a semiconductor switch, a neodymium magnetic core, and a metal-oxide varistor. A custom control algorithm is developed to detect the fault occurrence and perform the correct switching order of the proposed hybrid fault current limiter. A novel feature included in the proposed hybrid fault current limiter is the ability to control the fault current magnitude through the use of pulse-width modulation. In addition, the Jiles-Atherton method of hysteresis is used to model the nonlinear permeability of the NdFeB core. Simulations are performed using Power System Computer Aided Design (PSCAD) for both a high voltage and a low voltage system. A low voltage (20 V, 1.25 A) hardware system is built to verify the PSCAD simulations, and the results are presented. In conclusion, a comparison between the PSCAD simulations and the hardware experimental results verify the correct modeling of the proposed topology and confirm its feasibility.

Original languageEnglish (US)
Pages (from-to)1366-1380
Number of pages15
JournalInternational Transactions on Electrical Energy Systems
Issue number7
StatePublished - Jul 1 2015


  • fault current limiter
  • ferromagnetic core
  • permanent magnet
  • power system protection

ASJC Scopus subject areas

  • Modeling and Simulation
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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