This paper presents a dedicated transient stability assessment of the Onitsha Transmission Station (TS) following a single line-to-ground (SLG) fault. The study employs dynamic simulation to evaluate the system's response by monitoring critical parameters, including rotor angle, speed deviation, electrical power, bus voltage, and accelerating power. A pivotal finding is the determination of a Critical Clearing Time (CCT) of 0.60 seconds for this specific fault contingency. The results demonstrate that the system maintains transient stability when the fault is cleared within this window, as evidenced by the well-damped oscillatory behavior observed across all measured parameters. However, the analysis also reveals a demanding stability margin, characterized by a significant voltage sag and rapid rotor acceleration. The study concludes that while the existing system is stable for the defined CCT, the narrow margin necessitates highly responsive protection systems and presents a strong case for considering stability-enhancing measures to fortify the Onitsha bus against future grid disturbances.
Transient Stability, Single Line-to-Ground Fault, Onitsha TS, Critical Clearing Time, Power-Angle Curve, Power System Protection.
International Journal of Trend in Scientific Research and Development - IJTSRD having
online ISSN 2456-6470. IJTSRD is a leading Open Access, Peer-Reviewed International
Journal which provides rapid publication of your research articles and aims to promote
the theory and practice along with knowledge sharing between researchers, developers,
engineers, students, and practitioners working in and around the world in many areas
like Sciences, Technology, Innovation, Engineering, Agriculture, Management and
many more and it is recommended by all Universities, review articles and short communications
in all subjects. IJTSRD running an International Journal who are proving quality
publication of peer reviewed and refereed international journals from diverse fields
that emphasizes new research, development and their applications. IJTSRD provides
an online access to exchange your research work, technical notes & surveying results
among professionals throughout the world in e-journals. IJTSRD is a fastest growing
and dynamic professional organization. The aim of this organization is to provide
access not only to world class research resources, but through its professionals
aim to bring in a significant transformation in the real of open access journals
and online publishing.