Author:

Keywords:

Science & Technology, Technology, Energy & Fuels, Engineering, Electrical & Electronic, Engineering, Inertia emulation, converter connected generation, power system stability, renewable power integration, virtual inertia

Abstract:

© 2016 IEEE. With the increasing penetration of converter connected generation in power systems, different methods are proposed in the literature to emulate inertia in order to compensate for the reduced synchronous inertia provided by conventional power plants. Although the effectiveness of these methods is demonstrated for a single unit or within a small system, it still remains unclear how inertia emulation should be implemented in large power systems. By means of a test system the influence of delivering virtual inertia on the small signal stability is studied in more detail. It is shown that depending on the amount of inertia and control of the converter, additional low-frequency modes are introduced in the system due to the reduced coupling between the synchronous and converter connected units.