Protection from ground faults in the stator winding of generators at power plants in the Siberian networks

R. A. Vainshtein, V. I. Lapin, A. M. Naumov, A. V. Doronin, S. M. Yudin

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2 Citations (Scopus)


The experience of many years of experience in developing and utilization of ground fault protection in the stator winding of generators in the Siberian networks is generalized. The main method of protection is to apply a direct current or an alternating current with a frequency of 25 Hz to the primary circuits of the stator. A direct current is applied to turbo generators operating in a unit with a transformer without a resistive coupling to the external grid or to other generators. Applying a 25 Hz control current is appropriate for power generation systems with compensation of a capacitive short circuit current to ground. This method forms the basis for protection of generators operating on busbars, hydroelectric generators with a neutral grounded through an arc-suppression reactor, including in consolidated units with generators operating in parallel on a single low-voltage transformer winding.

Original languageEnglish
Pages (from-to)79-82
Number of pages4
JournalPower Technology and Engineering
Issue number1
Publication statusPublished - May 2010



  • Application of control current.
  • Ground fault protection
  • Stator winding

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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