Abstract:
The Transmission System is the backbone of the power utility of a country which
contributes to the provision of uninterrupted power supply to the consumers. The power
dispersal is the primary role of the transmission system which is operating at high
voltages to avoid losses. The conventional method of strengthening the transmission
system is to build more transmission lines to ensure reliability, redundancy and at least
N-1 contingency. However, due to the growing population, the new constructions have
several limitations, therefore utilization of the existing transmission system up to the
maximum possible extent is of prime importance.
To ensure the utilization of existing system, FACTS devices play a pivotal role.
These not only enhance the power transfer capability but also increase the performance
of transmission line. Moreover, by managing the impedance factor of the FACTS devices,
the power can be controlled to flow in a certain direction.
In the current study, cases are developed to study the effect of installation of
Static VAR Compensators (SVC) and Series Compensation (Fixed). For the study, IEEE
systems of 14 and 39 Bus are utilized.
Contingency analysis is performed to calculate the performance parameter (PP)
during contingency of transmission line tripping. Performance parameter is summation
of Number of overloaded transmission lines and Number of buses underwent voltage
violation when transmission lines are tripped. Based on the value of PP, the ranking is
done regarding the severity of effects whenever contingency occurred, and line is tripped.
FACTS devices (SVC and Series Compensators) are installed at weak buses
present in the system and then load flow analysis using Power System Simulator for
Engineering (PSSE) has be carried out. The results would be compared with the scenario
when FACTS are not installed. This would be applied to two standard systems of IEEE
of sufficient sizes and in the end chunk of transmission system of Pakistan would be
studied and remedies would be proposed if time permits.
