Practical computation of di/dt for high-speed protection of DC microgrids

Chunpeng Li, Puran Rakhra, Patrick Norman, Pawel Niewczas, Graeme Burt, Paul Clarkson

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

16 Citations (Scopus)
314 Downloads (Pure)


DC microgrids have the potential to radically disrupt the distribution system market due to the benefits offered in easing the integration and control of distributed renewable energy resources and energy storage systems. However, the nonzero-crossing fault current profiles associated with short-circuited
DC systems present a major challenge for protection. Isolation of faulted networks prior to the peak-current discharge of DC side capacitors may address this challenge if rapid fault detection speeds (shorter than 2ms) can be achieved. Accordingly, novel methods of utilizing the rate-of-change-of-current (di/dt) have been proposed in the literature to realize new, high-speed distance protection strategies. This paper proposes two practical methods for optimizing the numerical computation of di/dt of fault current transients and evaluates the performance of each within a MATLAB/Simulink model of a DC microgrid with artificially injected measurement noise.
Original languageEnglish
Title of host publication2017 Second IEEE International Conference on DC Microgrids (ICDCM)
Place of PublicationPiscataway, NJ
Number of pages7
ISBN (Print)9781509044795
Publication statusPublished - 7 Aug 2017


  • DC microgrids
  • power system measurements
  • digital signal processing
  • power system protection


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