Effects of Variations in Generator Inputs for Small Signal Stability Studies of a Three Machine Nine Bus Network
Small signal stability causes small perturbations in the
generator that can cause instability in the power network. It is
generally known that small signal stability are directly related to the
generator and load properties. This paper examines the effects of
generator input variations on power system oscillations for a small
signal stability study. Eigenvaules and eigenvectors are used to
examine the stability of the power system. The dynamic power
system's mathematical model is constructed and thus calculated using
load flow and small signal stability toolbox on MATLAB. The power
system model is based on a 3-machine 9-bus system that was
modified to suit this study. In this paper, Participation Factors are a
means to gauge the effects of variation in generation with other
parameters on the network are also incorporated.
Eigen-analysis, generation modeling, participationfactor, small signal stability.
Steady State Simulation of Power Systems with Change in Topology
In power system protection, the need to know the load
current together with the fault level detected by a relay is important.
This is due to the fact that the relay is required to isolate the
equipment being protected if a fault is present and keep the breaker
associated with it closed if the current level is lower than the
maximum load level. This is not an issue for a radial system. This is
not the same however in a looped power system. In a looped power
system, the isolation of an equipment system will contribute to a
topology change. The change in the power system topology will then
influence or change the maximum load current and the fault level
detected by each relay. In this paper, a method of data collection for
changing topology using matlab and sim-power will be presented.
The method will take into consideration the change in topology and
collect data for each possible topology.
Topology Change, Power System Protection, Power
System simulation, Matlab, Sim-power.