TURBOGENERATOR ROTOR HEATING IN PRESENCE OF ROTOR WINDING DEFECTS AND EXCITATION CURRENT FORCING

Authors

  • Yu. M. Vaskovskyi National Technical University of Ukraine «Kyiv Polytechnic Institute», Ukraine https://orcid.org/0000-0003-1262-0939
  • O. A. Geraskin National Technical University of Ukraine «Kyiv Polytechnic Institute», Ukraine

DOI:

https://doi.org/10.20998/2074-272X.2020.1.02

Keywords:

turbogenerator, rotor winding, temperature, temperature gradient, short circuit, clogging of cooling channels, excitation forcing

Abstract

Purpose. Research of the TGV-200 turbogenerator rotor heating in case of rotor winding damages, which occur as a result of prolonged operation of the turbogenerator, namely - clogging of the ventilation channels of the rotor winding and the occurrence of short circuits of the rotor windings. Particular attention is paid to heating during short-term increasing of the excitation current, which is performed to keep the generator in synchronous mode of operation. Methods. Field mathematical models are used. Results. It is determined that the clogging of the rotor winding ducts has a greater effect on the rotor heating compared to the short circuits of the individual windings of the rotor winding. It was defined that increasing of the excitation current within the limits regulated by the current standards of the turbogenerators operation becomes impossible with clogging of a small number of ventilation channels of the rotor winding, which impairs the efficiency of the turbogenerator and requires its output to repair. Scientific novelty. A mathematical model of rotor heating is developed in case of typical damages of the rotor winding. Practical value. The areas in the rotor where the temperatures and temperature gradients reach the highest values was determined, which allows to recommend the locations of the optimal temperature sensors placements. 

References

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Published

2020-02-19

How to Cite

Vaskovskyi, Y. M., & Geraskin, O. A. (2020). TURBOGENERATOR ROTOR HEATING IN PRESENCE OF ROTOR WINDING DEFECTS AND EXCITATION CURRENT FORCING. Electrical Engineering & Electromechanics, (1), 10–15. https://doi.org/10.20998/2074-272X.2020.1.02

Issue

No. 1 (2020)

Section

Electrical Machines and Apparatus

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Copyright (c) 2020 Yu. M. Vaskovskyi, O. A. Geraskin

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