Cutset stability criterion for power systems using a structure-preserving model

K. S. Chandrashekhar, D. J. Hill

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The direct assessment of large-disturbance stability using the model given by Bergen and Hill is studied. this model differs from the usual classical model with constant-impedance loads in that no network reduction is used; the system structure is preserved with the loads modelled as first-order dynamical systems. A new style of stability criterion is suggested which is based on local transient energy flow across network cutsets. This is found to give a more accurate assessment of stability than the usual approach based on total transient energy in the system. The criterion is applied to 5-bus and 14-bus example systems.

Original languageEnglish
Pages (from-to)146-157
Number of pages12
JournalInternational Journal of Electrical Power and Energy Systems
Issue number3
Publication statusPublished - Jul 1986
Externally publishedYes


  • dynamic stability
  • short-term system dynamics
  • transient stability

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