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Basic considerations and experiences in the application of 100% stator earth fault protection relays evaluating the 3rd harmonic of the generator voltage

Grundsätzliche Betrachtungen und Erfahrungen von 100 % Ständererdschlussrelais, basierend auf dem Prinzip der dritten Harmonischen der Generatorspannung

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Zusammenfassung

Ein Ständererdschluss im Generator entsteht durch den Verlust der Isolation zwischen der Ständerwicklung und dem Eisenkern. In den letzten Jahrzehnten wurden verschiedene Verfahren zur Erkennung entwickelt. Mit den Erfahrungen aus der Praxis werden die verschiedenen Verfahren, basierend auf der dritten Harmonischen, beleuchtet, und eine Methode zur Lösung wird vorgestellt.

Summary

A stator earth fault of a generator is the result of a lack of isolation between the stator winding of a generator and its iron core. In the last decades a number of different philosophies have been developed. With the latest experiences on the behaviour of the 3rd harmonic voltages of a generator the differences of applicable philosophies will be discussed and an approach to a sustainable solution will be outlined.

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References

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Authors and Affiliations

  1. Protection Department, Euro Plaza – Object D, Andritz Hydro GmbH, Vienna, Austria

    N. Salomon & M. Pairits

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  1. N. Salomon
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  2. M. Pairits
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Salomon, N., Pairits, M. Basic considerations and experiences in the application of 100% stator earth fault protection relays evaluating the 3rd harmonic of the generator voltage. Elektrotech. Inftech. 127, 13–17 (2010). https://doi.org/10.1007/s00502-010-0709-2

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