Electric Power Systems

About the section

The section Electric Power Systems offers research expertise within three main areas, namely in the fields of Modern Power Transmission Systems, Wind Power Systems, and Intelligent Energy Systems and Active Networks. This section conducts research addressing fundamental engineering and economic challenges facing our rapidly evolving electricity grid.

Modern Power Transmission Systems

Modern Power Transmission Systems, addresses the new challenges facing the future power systems. The main research areas in this subsection can be briefly summarized as below:

  • Reliable Integration of large offshore wind farms into power system
  • Operation of systems with large share of HVAC cables
  • Stability, security and reliability of power system in the presence of high share of non-synchronous generation sources
  • Power quality issues addressing resonance damping and harmonic mitigation in offshore wind farms
  • Smart protection relays for low inertia power systems
  • Replacement of conventional overhead transmission lines with composite-based pylons
  • Reliable Operation, Control and Protection of Multi Terminal HVDC transmission Lines

Wind Power Systems

The mission and ambition of Wind Power Systems is to keep Denmark as the worldwide leader and pioneer in the wind industry, as wind energy derives the power system one step closer to a more green and eco-friendly environment. The recent research activities covers the following Resilient Power Systems with Ancillary Services Provided by Wind Farms.

  • Levelized Cost of Energy in Onshore/Offshore Wind Farms
  • Intelligent Energy Management System in Wind Power Plants
  • Hybrid Wind Power Plants

Intelligent Energy Systems and Active Networks

The research focus in this area is intelligent, reliable and optimal operation, control and protection of dispersed and renewable energy sources, energy storage units and demand side responses in distribution network. Different research areas and key objectives are:

  • Market Oriented and Optimal Energy Management in Distribution Systems
  • Controllability and Observability in Distribution Networks
  • Intelligent Energy Management in Active Distribution Network
  • Grid support by Active Distribution Networks via Ancillary Services

Laboratory Facilities

The section has high-tech facilities in term of four well-equipped laboratories. The Power System laboratory includes models of distribution systems including renewable energy supply units and storage facilities. Furthermore, the laboratory has testing facilities for relay protection units and professional simulation software for power system analysis.

A new Real Time Digital Simulator (RTDS) laboratory is established, where power system electromagnetic simulations can be performed in real time. In total, four racks and two sets of Giga Transceiver I/O cards (GTIO) are available to simulate larger power systems.

The Medium-Voltage Laboratory is a lab for safe and controlled environment for testing of equipment up to 20kV/2MVA including power converters, circuit breakers, transformers or insulations.

The High Voltage laboratory contains HV test equipment for student use, possibilities for partial discharge, tan δ and dielectric response measurements and an 800 kV MARX impulse voltage generator.

The Department possesses a large amount of highly accurate equipment and testing setups for field measurement. Most of the equipment are portable and can be used in high voltage substations and wind farms.

A more detailed description of the laboratory facilities can be found at their webpages.

Contact Information

Professor Claus Leth Bak
Direct phone: +45 9940 9281
E-mail: clb@et.aau.dk

Research Mission

The research mission for all the section’s topics is to secure and optimize the power system operation, control and protection and to ensure that the power quality follows the latest standards and grid codes. Due to this mission, the section currently participates in the following research programmes: