Dynamics of Momentary Reserves under Contingency: Observations from Numerical Experiments

Abstract

This paper presents studies and investigations on the dynamics of momentary reserves in electrical power systems under contingency. Momentarily 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. 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. This numerical experiment also suggests the optimal placement of the momentary reserves in the grid in order to improve system stability against power outage disturbances. IARIA Conference Paper: http://www.thinkmind.org/index.php?view=article&articleid=energy_2021_1_40_38009