Stable Power Grids

Resiliency and Power Quality
at all Grid Levels

An important topic for all grid operators: due to the growing amount of renewable energy generation, maintaining grid stability becomes increasingly difficult. At the same time, electric vehicles become new stochastic consumers in the existing grid infrastructure. Here, flywheels play an important role, since they can resolve grid stability issues – at competitive costs.

System Services in the
Transmission and Distribution Grid

The energy transition requires new technical solutions for a secure and reliable grid operation. These requirements are also reflected in new regulations for system services. The Flywheel can provide a large number of these necessary and regulatory required system services, partly also in parallel.

Application Benefits:

The Flywheel in the transmission grid

The Flywheel in the distribution grid

Advanced Industrial Microgrids and
Uninterruptible Power Supplies

In many regions the power grid is unable to keep pace with the increasing demands of industry in terms of power quality.

Here, the flywheel offers new perspectives: it makes it possible to automatically transfer sections of the grid into island mode operation in case the surrounding grid becomes unstable. The connected plants and consumers continue to operate without interruption, processes run smoothly and without any quality issues.

As soon as the surrounding grid is available again, re-synchronisation of the microgrid takes place automatically, and the microgrid is coupled once again with the surrounding grid, all without interruption.

Application Benefits:

Critical facilities in an industrial microgrid

Hybrid Energy Storage

When coupled with batteries, such as Li-Ion, the flywheel effectuates a reduction in the battery cycles. Installing a flywheel system with just a fraction of the battery power may already bring about a significant reduction in the cyclic load for the battery – considerably increasing its service life.

Application Benefits:

Railway Electrification

Voltage Stabilisation and
Braking Energy Recuperation

In railway grids this principle is also valuable: a stationary flywheel connected to a rail grid will stabilise the grid voltage. In addition, the flywheel enables recuperation of a significant amount of braking energy, releasing it during acceleration phases of trains. This makes better use of the existing infrastructure, and increases the energy efficiency of the railway grid, thus reducing operating costs.

Application Benefits:


In order to determine the ideal location for the flywheel system within a railway grid, the measuring system PowerMapper was developed. This cloud-connected, train-mounted system collects the power burnt during braking and logs it together with the position coordinates.

This makes it possible to analyse the economic and technological potential of a flywheel in a concrete application and to determine an appropriate location – very precisely and reliably.




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