Past Projects

This project investigates an optical current measurement system with a wide measurement bandwidth and high accuracy based on the Faraday effect. These current measurement concepts are especially interesting in environments with high insulation requirements between the power rails.

Further information on optical current measurement system

Ultra-fast pulse generator with nanosecond voltage pulses. The pulse generator uses WBG semiconductor devices in low-inductive packages to achieve nanosecond switching speeds. Possible applications areas include plasma generation and particle accelerator systems.

Further information on nanosecond pulsers

The hybrid transformer at the medium to high voltage grid interface combines the robustness of the power transformer with the flexibility of  the power electronics converter. Therefore, the hybrid transformer is key to a more advanced and flexible grid.

Further informatin on MV hybrid transformer

Accurate & fast models of the transformer leakage inductance are crucial in the design of converters for photovoltaics, traction systems, grid  control, and many more. Models are investigated, developed, and extended to cover a wide range of transformers.

Further information on models of transformer leakage inductance

A high power dynamic and ultra-​low ripple current source is investigated and developed. The source delivers currents of several kAs and generates complex controllable waveforms to a variety of loads. Thanks to its modularity, the source can fulfill requirements of a range of modern applications.

Further information on high power current sources

DC circuit breakers (DC-​CB) for a fast fault current interruption are a key component in multi-​terminal DC-​grids. To optimise DC-​CB in terms of performance, costs and reliability, new concepts, optimization methods, and energy dissipation concepts are developed.

Further information on hybrid DC circuit breakers

Utilize high performance closed loop control to reduce the required module capacitance value of grid connected modular multilevel converters  (MMC) while achieving as much transient performance (e.g. quickly change the output power) as possible.

Further information on control of MMC rectifiers