Assessment of the impact that individual voltage source has on a generator’s stability

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This paper presents an approach for splitting equivalent Thevenin voltage into components induced by each voltage source in the reduced grid. Thevenin equivalent representation of the system is sometimes used for stability assessment of a given generator, where the Thevenin voltage is one of the key variables affecting the stability conditions. Thevenin voltage is formed by components induced by each voltage source in the grid, while depending on topology and system parameters, the impact of these components on the equivalent Thevenin voltage Eth might vary considerably. This paper demonstrates how the impact of individual voltage source to the Eth might be defined utilizing system admittance matrix. Knowledge about alternation of Eth while applying changes to either admittance matrix or generators’ excitation and torque gives promising perspective for determination of effective countermeasures aimed on instability prevention. Suggested approach for Eth decomposition is applied to the IEEE 30 bus test system.
Original languageEnglish
Title of host publicationProceedings of 10th International Power and Energy Conference, IPEC 2012
Number of pages6
Publication date2012
Publication statusPublished - 2012
EventThe 10th International Power and Energy Conference (IPEC 2012) - Ho Chi Minh City, Viet Nam
Duration: 12 Dec 201214 Dec 2012


ConferenceThe 10th International Power and Energy Conference (IPEC 2012)
CountryViet Nam
CityHo Chi Minh City


  • Power systems
  • Stability
  • Preventive countermeasure
  • Thevenin equivalent


SOSPO: Secure Operation of Sustainable Power Systems

Østergaard, J., Jóhannsson, H., Nielsen, A. H., Garcia-Valle, R., Yang, G., Lind, M., Blanke, M., Weckesser, J. T. G., Wittrock, M. L., Møller, J. G., Perez, A., Pedersen, A. S. & Zhang, X.


Project: Research


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