Static stability calculation

Static stability calculation involves the analysis of aperiodic stability, as well as the oscillation stability. The study of aperiodic stability is based on the weighting calculation which allows to determine the station generating capacity limits, power transmission lines capacity, and allowable voltage in network nodes.

In DAKAR, the study of oscillation static stability is implemented using two methods: dynamic and modal. This approach allows
a comprehensive study of the stability of modern power systems:

  • to determine the optimal settings of excitation systems of synchronous generators
  • to determine the need to install system stabilizers
  • to study the conditions of low-frequency oscillations.
Required data
models of electrical network elements
  • network model
  • power transmission lines models
  • transformer models
  • load models
synchronous machines models
  • excitation systems models
  • turbines models
PV, WTG models
aperiodic stability
weighting calculation
  • limit load operation
  • maximum and emergency permissible power flows
  • PV/QV curves
oscillation stability
dynamic method
  • power system stability
  • causes of power system instability
  • influence of generator parameters on stability of the power system
modal method
  • power system stability margin
  • causes of power system instability
  • damping ratio of low-frequency oscillations
  • stage of participation influence of the generator parameters on the oscillations of the power system
  • identification of groups of generators between which low frequency oscillations arise
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