Abstract:
The increase in power system demand has forced the power system to
operate closer to its stability limit, voltage instability in the electrical
networks has been given much attention by power system researchers and
planners in recent years, being regarded as one of the major sources of power
system insecurity. Maintaining a stable and secure operation of power system
is therefore very important and challenging issue. One of the major causes of
voltage instability is decrease in reactive power which occurs in stressed
condition of the power system.
There are several techniques and tools for voltage stability analysis in
power system, in this dissertation two methods of analysis are used, V-Q
sensitivity and modal analysis. Flexible Alternating Current Transmission
System (FACTS) devices play an important role in improving the
performance of power system, but these devices are very costly and hence
need to be placed optimally in power system. This dissertation evaluates the
performance of Sudan National Grid against the growing demand and
reactive power resources and enhancement of voltage stability of Sudan
national Grid by using static VAR compensator (SVC).
The simulation is carried out by using NEPLAN Software. The results
obtained showed the effect of SVC on the voltage and power losses.
