TITLE:
Enhancement of Transient Stability of the Nigeria 330 kV Transmission Network Using Fault Current Limiter
AUTHORS:
Ignatius K. Okakwu, Emmanuel A. Ogujor
KEYWORDS:
Transient Stability, Fault Current Limiter, Nigeria 330 kV, Power System
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.5 No.9,
September
27,
2017
ABSTRACT: The dynamic responses of generators when subjected to disturbances in an interconnected power system have become a major challenge to power utility companies due to increasing stress on the power network. Since the occurrence of a disturbance or fault cannot be completely avoided, hence, when it occurs, control measures need to be put in place to limit the fault current, which invariably limit the level of the disturbances. This paper explores the use of Superconductor Fault Current Limiter (SFCL) to improve the transient stability of the Nigeria 330 kV Transmission Network. During a large disturbance, the rotor angle of the generator is enhanced by connecting a Fault Current Limiter (FCL) which reduces the fault current and hence, increases transient stability of the power network. In this study, the most affected generator was taken into consideration in locating the SFCL. The result obtained reveals that the Swing Curve of the generator without FCL increases monotonically which indicates instability, while the Swing Curve of the System with FCL reaches steady state.