A novel 4-limb earth fault compensation reactor for distribution network

Jyrki Penttonen*, Matti Lehtonen, Shafiq Muhammad

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


This paper presents a novel earth fault compensation solution, which presents high positive sequence impedance and magnetically controllable zero sequence impedance. A 4-limb reactor is introduced to compensate earth fault currents in three-phase power distribution networks without the need of neutral point in substation transformer or separate earthing transformer. This results in considerably lower costs in implementing earth fault current compensation with much faster operation, making it possible to tune for 100% compensation during fault thus improving the probability of arc suppression. The presented reactor is analyzed analytically, and its performance is validated by simulations. The presented solution can significantly improve the reliability of the supply network.

Original languageEnglish
Article numbere2433
Pages (from-to)1-11
Number of pages11
JournalInternational Transactions on Electrical Energy Systems
Issue number12
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed


  • Distribution network
  • Earth fault compensation
  • Reactor
  • Resonant earthing network
  • Transformers


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