08-16-2017, 09:32 PM
The swing generator model
The consequences of electric power outages dictate the
importance of conducting power system studies. These
studies will most likely be based upon models that
combine representations of the various components (e.g.,
generators, loads, and network) in the power system.This paper considers a classical flux-decay model to
which the proposed reduced model will be compared.
Both models incorporate the swing equation and differ
primarily in the voltage control and excitation dynamics.the swing
equation captures the mechanical dynamics of the
generator through rotor angle delta and generator speed omega. The proposed reduced model replaces the voltage and
excitation dynamics of the flux-decay model with a
single state model that captures the basic characteristics of
the flux-decay model.The voltage dynamics, effects of imposing excitation limits,
and steady-state behavior are taken into account here through a simple model.Combining the exciter with the swing equation yields a new generator model with behaviors chosen to be
similar to the flux-decay model.It is called the called the saturated swing generator model. the reactive power limitation of the
generator can be a cause of voltage instabilities. Similarly
bifurcation diagrams of the saturated swing model can be
created.When the saturated swing generator model is considered
(with varying limiting values) it is shown that as the load
is increased the bus voltage decreases. This Similar results occur when the saturated swing model is considered for both the lightly and heavily loaded system.Another important benchmark is to see how the saturated
swing generator responds to a step increase in a reference
voltage.
for details, read this report:
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