Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators

Yuling He, Minghao Qiu, Xinghua Yuan, Haipeng Wang, Mengya Jiang, Chris Gerada, Shuting Wan

Research output: Journal PublicationArticlepeer-review


This paper analyzes the electromagnetic torque (EMT) fluctuation characteristics in synchronous generators under rotor interturn short-circuit (DRISC) fault. The novelty of this paper is that the DRISC fault is proposed based on the intermittent interturn short circuit existing in the actual operation and compared with the static rotor interturn short-circuit (SRISC) fault. In the work, by studying the influence of DRISC with different positions and different short-circuit degrees, the fluctuation characteristic of the EMT is analyzed and verified. The results show that when the DRISC5% fails, the location is in slot 3, the amplitude of first harmonic decreases by 7.2%, second harmonic amplitude increases by 33.4%, third harmonic decreases by 4.3%, and fourth harmonic increases by 26.8%. As the degree increased and positioned away from the large tooth of the DRISC, the overall EMT amplitude and reverse pulse increased, first and third harmonics decreased, and second and fourth harmonics increased.

Original languageEnglish
Article number3821
Issue number10
Publication statusPublished - 1 May 2022
Externally publishedYes


  • dynamic rotor interturn short circuit (DRISC)
  • electromagnetic torque (EMT)
  • harmonic component
  • magneto-motive force (MMF)
  • synchronous generator

ASJC Scopus subject areas

  • Control and Optimization
  • Energy (miscellaneous)
  • Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment


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