Virtual inertia-based load modulation for power system primary frequency regulation

Future power systems are more vulnerable to contingencies due to the fluctuating power generation arising from the integration of renewable resources with intermittent patterns. Aside from their intermittent nature, most of these resources can not participate in system reserves and in the entire system inertia. Therefore, higher amount of frequency deviation is foreseeable in future power systems with large penetration of renewable energy sources. In this paper, enjoying the smart load technology, a virtual inertia-based load modulation strategy is presented and compared to the conventional load modulation approach. Simulation results indicate that virtual inertia-based load modulation can achieve better generalization performance with minimum performance sacrifice compared to the conventional strategy. The detailed simulation is performed using SimPowerSystems (SPS) toolbox, in phasor mode, on the IEEE 39-bus New England test system.