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

Results

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

Results

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