Amprion and Siemens Energy partner on innovative grid control


German transmission system operator Amprion and Siemens Energy have signed a deal to cooperate on the development of new and innovative grid control technologies.

The two companies are already developing the first rotating asynchronous phase shifter called Asynchronous Rotating Energy System Stabilizer (ARESS) for a network frequency of 50 Hertz (Hz).

ARESS is a solution designed to ensure grid stability. An essential technological component of ARESS is an innovative frequency converter and a new, double-fed asynchronous machine with an optional flywheel.

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The need for the partnership arose due to the changing operational requirements of the transmission systems in Europe as a result of an increase of renewable energy sources with fluctuating feed-in. This is increasing the demand for reactive power and other innovative grid technologies for the resilience of the energy network.

North Rhine-Westphalia’s Minister of Economic Affairs, Innovation, Digitalization and Energy, Prof. Dr. Andreas Pinkwart, who was present during the signing of the deal between the two companies, said: “The increased feed-in of renewable, volatile energy, for example from wind and sun, will lead to noticeable changes in the power grids in the future. We must take precautions by implementing stabilisation mechanisms. I am pleased, that with this promising pilot project the two companies are making a significant contribution to the energy transition in Germany and are thus strengthening this location for innovative energy technology.”

Dr. Hendrik Neumann, technical director of Amprion, adds: “Until now, the reactive power was mainly provided by generators in large power plants. In the course of the energy transition, many of them are going offline. Therefore, Amprion is now investing more and more in innovative alternative solutions for grid stabilisation, such as ARESS.”