High Voltage Laboratory

360 picture of the lab


The High Voltage Laboratory has state-of-the-art equipment that can be used in the testing of materials and the study of different HV phenomena. The high number of MWB HV modules allows designing high-level detailed setups that can be used for experiments with fundamental HV theories. This is essential for students as HV engineering in nature is an experimentally based science.

The HV laboratory also has an 800kV impulse generator for testing with both lightning and switching impulses.

A 500 mm measuring sphere gap for measuring the highest voltages.

Special equipment

Below please find a list of some of the existing equipment:

  • 800kV Impulse generator with voltage divider
  • 2 sets of 100kV Lightning impulse setup (can be used for universal purposes)
  • 200kV AC Cascaded transformers
  • Digital partial discharge detector
  • Capacitance and loss angle measuring bridge
  • Modules (capacitors, resistors, spark gaps, rectifiers, pressure vessels etc..) that can be used in the designing of different test setups
  • Dielectric frequency response analyzer

Lightning impulse generator setup used for lecturing students at master’s education in electric power systems and high voltage.

Features & Services

The High Voltage Laboratory can be used for high voltage testing of all types of electrical insulation systems, ranging from insulators on air lines, wind turbine wings, solid and liquid insulation materials, all the way down to printed circuit boards. In the laboratory there is a particular focus on research in insulation design as well as on the life of future power electronics devices for voltages over 1000 V; eg. converters to offshore wind turbines.

Other testing equipment and field measurements

The Department possesses a large amount of highly accurate equipment for field measurements and testing of setups. Examples are:

  • 1 RTDS (Real Time Digital Simulator) (shared with other research groups)
  • 2 Omicron CMC 356 and 256 with GPS synchronization (universal testing solutions)
  • 1 Omicron Dirana (Insulation Diagnosis)
  • 1 Omicron CPC 100, with current boost up to 2000A
  • 5kV Portable impulse generator
  • Impulse current generator
  • Voltage and current probes, including Rogowski current probes (TRCP3000) and high voltage probes (40kV DC or 28kV AC)
  • Tektronix oscilloscopes 4054 B, 2014 and TBS 2000 (shared with other research groups)
  • Differential and distance relays (Siemens) that can be used to test different protection strategies

Most of the equipment is portable and can be used in field measurements.

Much of the research done in the research group includes extensive field measurements to verify computer simulation models. For instance, real life measurements have been conducted at:

  • Installed EHV transmission cable systems (cable impedance, linkbox connections, travelling waves)
  • Large power transformers (400/150 kV and 60/20 kV)
  • Grounding systems
  • Synchronous condensers
  • Protection relays
  • Power plants (large coal fired and biomass)
  • Offshore wind farms (Harmonics and switching transients)
  • General switching transient measurements with real-life switching in all types of network
  • Petersen coil grounded networks
  • Harmonic voltage and current measurements in 400 kV network

The Department has several software tools (MATLAB, PSCAD, PowerFactory, LabView, ANSYS, Comsol, etc…), for support of the measurements.


Pontoppidanstraede 109, room 1.125
9220, Aalborg East
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Contact Information

Selected Project Examples

Happy high voltage people – and the lecturer with the 800 kV lightning impulse generator.

A Haefely 800 kV lightning impulse generator used for both teaching and research.

Students observing a corona discharge

Testing of real life power system components – here a voltage transformer