Fraunhofer Institute for Energy Economics and Energy System Technology
Fraunhofer Institute for Energy Economics and Energy System Technology

Control System Design

Grid-forming power converters

The optimal control system for your grid-forming or grid-connected system – for now and for the future

The transition to grid-forming converters as part of the system stability roadmap mainly affects the control and regulation level of a plant. Hardware adaptation is largely unaffected. And in many pilot applications, the benefits and general feasibility of grid-forming converters have already been demonstrated. One challenge remains: how to manage the imposed voltage source behavior in the limited current carrying capacity of converters in line with demand.

In addition, increasing decentralization is also leading to greater flexibility in the power grid. As a result, resonance stability is becoming increasingly important. Generation plants must be compliant in this regard in order to function reliably in the grid even in changing constellations.

Development of grid-forming and grid-connected power converter control

Design &
Implementation

We develop new control strategies for grid-forming, grid-following, and hybrid operating modes.

Simulation & Validation

We test the controllers in real-time simulations and power hardware-in-the-loop environments to ensure stability and practicality.

Integration with IP protection

We customize the solutions to your system – your development secrets and intellectual property rights remain protected.

Optimization of existing controllers in terms of stability and grid compliance

Retrofit & Upgrade

We upgrade existing control systems to ensure they comply with new connection guidelines and international standards (e.g., VDE-AR-N 4110, FGW TR3, IEEE, EN).

Stability Analyses

We evaluate resonance stability and control quality in complex network configurations and optimize your control parameters.

Performance-Tuning

We improve the dynamics, efficiency, and robustness of your systems through targeted adjustments and practical testing.

Evaluation of system stability and grid-forming properties

Stability and
conformity testing

We examine the grid resilience, protective features, and control quality of your systems.

Advanced
Testing Methods

We combine simulation, rapid control prototyping, and power hardware-in-the-loop for realistic closed-loop testing.

Fit for the future

We check and confirm the grid compatibility of your system in accordance with the requirements of upcoming standards.

Grid-forming power converters