Abstract:
The primary objective of this thesis is to investigate & study the transient steadiness of a Single
Machine Infinite Bus (SMIB) system. The objective is due to the fact that the most desirable
quality of an AC power Bus is steadiness. The definition of steadiness in this context is defined
as the ability of the Bus to hold both the supply voltage & the voltage frequency to a constant
value. In real life Power Bus, the value of frequency rarely changes, but value of voltage changes
all the time. When power supply is less than the operating load, the frequency also reduces. The
voltage changes may be due to the short comings of the power Bus & its relevant systems, the
inability of the generators to provide enough power or due to the intensity of the load on the Bus.
This thesis assumes the power Bus to be ideal i.e. no loss & also assumes that the generators are
of sufficient capacity. Therefore only manipulative variable is the load. During the research,
theoretical models for the relevant systems & sub systems were generated. Practical
implementation of the said research is currently out of scope due to technical reasons e.g. the Bus
bar works at 130 kv. Simulation models include generator model, load models (both static &
dynamic) and reduced network model. The theoretical prediction is that steadiness can be
improved via load curtailment. This prediction is tested during simulation. Before simulation a
SMIB system is modelled with a load & infinite Bus. For the simulation fault points are
designated at multiple points, one is explored at a time. Fault points include the secondary of
power transformer, at the infinite Bus node & at the transmission node. The effect of fault is
noted at the generator rotor angle & at the output power. Based on the result, multiple modes of
curtailment are proposed that can help steadiness
