Laboratory Studies of Artificial Inertia

One of the important parameters and at the same time indicator of the operation of the electrical power network is frequency. A sudden excessive change in this can lead to a system collapse, to the black-out. The speed of change (RoCoF) is increasing due to power electronic inverter feed-ins, the share of rotating machine system inertia is decreasing. As an artificial substitute for this, power electronics “injection” is possible. In this article are introduced some features of artificial inertia in laboratory conditions, such as simulating inverter control, the effect of injection on a large energy system, measuring RoCoF and fast power control of household-scale PV inverters.