Home // International Journal On Advances in Systems and Measurements, volume 14, numbers 1 and 2, 2021 // View article
Authors:
Kosisochukwu Pal Nnoli
Stefan Kettemann
Keywords: momentary reserves; system perturbation; inertia control, oscillations damping; grid meshedness.
Abstract:
This paper presents the studies and investigations on the dynamics and mechanism of momentary reserves contribution in electrical power systems under contingency. Momentary reserve through the machine’s inertia serves the purpose of primary frequency control and prevents voltage collapse in the case of reactive power reserves. A simulation was performed on a realistic Nigerian 330 kV transmission network in PowerFactory software to study and investigate the mechanism of these reserve functions on the network buses as an inertia active power control method. Moreover, we investigated the influence of geodesic increment of momentary reserve on the decay of disturbances and in turn estimated the value of the post contingent frequency at the network buses. The results indicated that the momentary reserve by inertia alone reduces the frequency deviation from its nominal value, delays the transmission of disturbances and enhances the damping of oscillations by reducing the final frequency settling time at the buses under contingency. These results were further extrapolated by the numerical experiments carried out on a synthetic Square 330 kV power network to account for the effects of meshedness as a distinguishing factor in grid topologies. These numerical experiments also suggest the optimal placement of the momentary reserves in the grid in order to improve system stability against power outage disturbances.
Pages: 137 to 147
Copyright: Copyright (c) to authors, 2021. Used with permission.
Publication date: December 31, 2021
Published in: journal
ISSN: 1942-261x