The Highly Efficient And Reliable smart Transformer (HEART)


Schleswig-Holstein is funding the construction of a medium voltage laboratory

The state is co-funding the construction of a medium voltage laboratory at the chair of power electronics from the “Landespgroamm Wirtschaft” (EFRE). This project follows the target to extend the research for the grid integration of renewable power plants to medium voltage, where already today all large plants are connected. With the availability of this infrastructure, it will be possible to investigate and solve problems in the actual electrical distribution grid. The laboratory will enable to test power electronics up to 10 kV AC and up to 1 MW power.

Technical Specifications:

Voltage Level (MV)

[2,4,6,8,10] kV

Voltage Level (LV)

400 V


1 MW

Maximum Current

1600 A

Cooling Power (liquid)

60 kW

Cooling Power (Air)

10 kW


Layout of the MV Laboratory with experimental setups


This laboratory will be equipped with a Real Time Digital Simulator (RTDS) and a power amplifier in order to test power electronics prototypes under realistic conditions. The RTDS system and the power amplifier setup will enable the realization of extensive converter tests without affecting the real grid. The setup consists of:

  •  RTDS system (2 racks for a maximum of 360 single-phase nodes simulated)
  •  Medium Voltage connection of 10 kV
  •  Air conditioned room for power electronics converter testing
  •  AC power source
  •  DC Power source
  •  Electronic loads
  •  Voltage Source Converters



RTDS configuration for power converter testing