Characterization of Oscillations in Developing Power Systems: The Nigerian Case Study

Enhancing Renewable Energy-Grid Integration by Optimally Placed FACTS Devices: The Nigeria Case Study

“…In analysing the angle stability, we concentrated on interarea oscillations, which typically represent the most severe oscillations in a power system due to the involvement of multiple generators. The power system under study exhibits the slowest inter-area oscillation at 0.66 Hz [31], primarily associated with Ihovbor and Sapele generators. Therefore, we introduced a three-phase fault at Ihovbor for consistency.…”

Fundamental study of oscillations in the Nigerian power system

“…𝛿 𝑖𝑗 = 𝛿 𝑖 − 𝛿 𝑗 (16) where 𝐸 𝑖 is internal bus voltage of generator i, M i , inertia constant of generator i, P mi , mechanical power input of generator i, P ei , electrical power of generator i, G ii , driving point conductance of node i, 𝐺 𝑖𝑗 + 𝑗𝐵 𝑖𝑗 , the transfer admittance in the system reduced to the internal nodes between generators i and j, ω i , rotor speed of generator i, ω s , synchronous speed, δ i , rotor angle of generator i, ω i , rotor speed of generator i, ω s , synchronous speed, D i , damping coefficient of generator i. We added a slight uniform damping (𝐷 = 0.3) to enable one see the stability of the eigenvalues.…”

“…The current paper is an expansion of the investigations carried out in [16]. The major new contributions are as follows:…”