Jobbet "Industrial phd in development of methodology for small-signal stability assessment in energy island type systems" er udløbet.
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Denmark has historically harvested green energy from strong ocean winds via isolated wind farms which transfer electricity directly to the Danish grid via typically AC subsea cables. With a political agreement on commissioning two energy islands up to 6 GW at the Baltic Sea and the North Sea by 2033, Energinet will play a key role in developing the Energy Island projects to ensure a reliable supply of green electricity to the Danish grid. With the Energy islands, the wind farms from different owners can be placed further away from shore as a part of so-called energy hubs and transferred the gathered energy between several countries efficiently via offshore HVDC (High voltage direct current) transmissions. This approach allows electricity from an area with vast wind resources to be more easily routed to areas that need it the most.

The energy islands are pioneer projects that will require the deployment of existing knowledge into an entirely new context. Especially, from an electrical perspective, integration of such huge size of production to land has not been established historically, and stable operation of the two energy islands is a key factor to successfully integrate the islands to the Danish grid. Different from single point-to-point HVDC projects and single wind power plant projects in offshore, Energy islands are the type of systems, where many different types of power electronic interfaced devices are integrated in close vicinity to each other. Since the system itself is a weakly meshed grid, there are high potential risks of instability issues, which can cause multiple cascaded events. In addition to this, complexity of analysis methodologies and development of assessment criteria are even more complicated once the system is being expanded in the future. It is therefore highly significant to develop a new methodology for stability assessment, which can support full-scale integration and optimization of energy island type projects and consider future expansion of such systems.

At the Department Power System Design, Energinet, an industrial PhD position in Development of Methodology for Small-signal Stability Assessment in Energy Island Type Systems is available. This PhD project will focus on developing scalable and expendable small-signal analysis methods for the energy-island type systems, such as state-space and impedance-based analyses. The developed methodologies will contribute to the analysis of converter control interactions in multi-vendor environment and filling the gaps between theoretical approaches and industrial applications. The candidate will be employed by Energinet and enrolled as a PhD student at the Doctoral School of Engineering and Science, Aalborg University. Both university and company supervisors will be arranged to the PhD candidate.

University supervisor / co-supervisor: Frede Blaabjerg / Xiongfei Wang

Company supervisor / co-supervisor: Jun Bum Kwon / Yicheng Liao

What we offer
As an industrial PhD candidate, you will work part time at Energinet in Fredericia and part time at AAU Energy in Aalborg. There is the possibility of flexible periods in the company and the university, which fit your research. There is also opportunity for several-month research abroad at another institute.

At the Department Power System Design, Energinet, you will contribute directly to the Danish green transition, by dealing with real-life challenges, working with specialized power system stability experts, and playing an important role in developing future solutions for assessment of power system stability. You can learn more about Energinet at

At AAU Energy, Aalborg University, you will be educated with problem-based learning, work under a dynamic and international research environment, get access to extensive and leading workshop and laboratory facilities. You can learn more about AAU Energy at

Qualification requirements
Applicants to the PhD position must hold a degree equivalent to a Danish Master's degree. The applicant is expected to have the following merits.

  • Education background in electrical engineering and research experience preferrable in power electronics
  • Ability to work with advanced theory and are equipped with strong analytical skills
  • Communication skill in English at a good level and speaking Danish would be an advantage.
  • Software skills, e.g., PSCAD, MATLAB/Simulink, and programming skills, e.g. Python
  • Flexibility and mobility to work both in Aalborg and Fredericia
  • Flexibility and ability to work in a team environment

Application and Contact
Send your application via the link. The application must include:

  • A motivated text wherein the reasons for applying, qualifications in relation to the position, and intentions and visions for the research topic (e.g. a brief project description) are stated.
  • A current curriculum vitae.
  • Copies of relevant diplomas and transcripts from previous university studies (undergraduate and master or its equivalent). The copies of originals shall be certified. If the originals are neither in English nor Danish, official English translations are requested.
  • Scientific qualifications. You may attach up to 5 publications.
  • Additional qualifications in relation to the position, e.g., English test certificates, references/recommendations, etc.

The application deadline is 4 January 2023. We plan interviews 11-12 January (1st interview online) and 24 January (2nd interview in Fredericia). If you have any questions about the PhD position, you are welcome to contact Head of Grid Analysis Department, Christian Flytkjær, on telephone 0045 30 67 46 88 or Jun Bum Kwon, on telephone 0045 20 26 68 93.

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