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Dreidimensionale Temperaturverteilung in großen Wasserkraftgeneratoren: effiziente Simulation und Optimierung

Three-dimensional temperature distribution in large hydro-generators: efficient simulation and optimization

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Zusammenfassung

In großen luftgekühlten Hydrogeneratoren in Synchronmaschinen-Ausführung werden die anfallenden Verluste über einen erzwungenen Kühlluftstrom gekühlt. Zur Vermeidung hoher Ventilationsverluste, die durch Luftreibung und den entsprechenden Aufwand für die Druckerzeugung entstehen, werden die Kühlluftströme derart dimensioniert, dass diese die Verlustquellen – also vor allem die Aktivteile – forciert kühlen. Dazu muss der Generator als Ganzes betrachtet und optimiert werden. In dieser Arbeit wird ein Berechnungsverfahren zur Ermittlung des dreidimensionalen Temperaturfelds in Wasserkraftgeneratoren hoher Leistung vorgestellt und anhand von Berechnungs- und Messergebnissen evaluiert.

Abstract

In large air-cooled hydro-generators, designed as salient-pole synchronous machines, a forced cooling air-flow evacuates power losses. In order to optimize ventilation losses caused by air-friction and fan air-pressure generation, the cooling-air distribution is set up in such a way that loss sources – mainly the active parts of the generator – are intensely cooled. For this purpose, the generator as a whole must be considered and optimized. This paper presents a calculation method for determining the three-dimensional temperature field in large hydro-generators and validates calculation results with measurements.

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Authors and Affiliations

  1. ANDRITZ HYDRO AG, Obernauerstrasse 4, 6010, Kriens, Schweiz

    Georg Traxler-Samek

  2. ANDRITZ HYDRO GmbH, Dr. Karl-Widdmann-Straße 5, 8160, Weiz, Österreich

    Daniel Langmayr

Authors
  1. Georg Traxler-Samek
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  2. Daniel Langmayr
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Correspondence to Georg Traxler-Samek.

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Traxler-Samek, G., Langmayr, D. Dreidimensionale Temperaturverteilung in großen Wasserkraftgeneratoren: effiziente Simulation und Optimierung. Elektrotech. Inftech. 136, 216–223 (2019). https://doi.org/10.1007/s00502-019-0723-y

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  • DOI: https://doi.org/10.1007/s00502-019-0723-y

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