Power plant generators are able to compensate for a short-term power failure due to the kinetic energy of their generators. Renewables do not usually provide inertia, as the generators are connected to the grid via frequency converters However, modern frequency converters coupled with ultracapacitors or battery storage can increase the feed-in energy within a few milliseconds in the event of frequency dips and thus support the grid. Depending on the system concept, instantaneous, i.e. completely delay-free active power adjustment in the event of frequency fluctuations can also be realized with frequency converters. This feature is also referred to as synthetic inertia.

Benefits:

• Ultra fast frequency stabilization
• In the future also Additional revenue stream by remunerated grid services