Postdoc in Ageing and Testing Methods of Stator Windings in Hydropower Generators

Trondheim, Norway
07 May 2019
End of advertisement period
19 May 2019
Contract Type
Full Time

About the position

The Department of Electric Power Engineering (IEL) at the Faculty of Information Technology and Electrical Engineering (IE), NTNU has a vacancy for a two-year position as a Post.doc research fellow at the Department of Electric Power Engineering. The described position is part of the research within the project "Hydro-generator Stator winding Insulation assessment" - HydroStator - funded by the Research Counsel of Norway (RCN) and industry.

The overall objective of the project is to establish new and reliable condition assessment criteria for high voltage hydro-generator stator insulation systems and thereby improve maintenance and reinvestment decisions. To achieve this, different destructive and non-destructive diagnostic measuring techniques are to be adapted for fault analysis and condition assessment of stator bars.

The main challenge addressed by this post.doc project is therefore to characterize and compare laboratory and service aged rods with respect to degree of degradation. Hydro- generator stator bars from storage or service as well as model bars are available as test objects in the project. The results obtained will be related to actual failure mechanisms and classified using statistical methods to estimate probability of failure, forming the base of improving maintenance and renewal decisions.

This project is closely coordinated with research in the Norwegian Centre for Hydropower Technology (HydroCen). This is a Centre for Environment-friendly Energy Research (FME). The FME-scheme is established by the Norwegian Research Council. The objective of the Research Council of Norway FME-scheme is to establish time-limited research centers conducting concentrated, focused and long-term research of high international caliber to solve specific challenges in the field. The FME-centers can be established for a maximum period of eight years.

The main objective of HydroCen is to enable the Norwegian hydropower sector to meet complex challenges and exploit new opportunities through innovative technological solutions. The research areas includes: hydropower structures, turbine and generators, market and services, and environmental design. NTNU is the host institution and main research partner together with SINTEF Energy Research and the Norwegian Institute for Nature Research (NINA).

The position reports to Head of the department.

Main duties and responsibilities

The main topic for the postdoc research work is to relate measurable diagnostic parameters to relevant rates of ageing and the overall condition of the generator rod. In particular, expected accelerated ageing caused by high current loads and frequent load variations are to be addressed both theoretically and experimentally. Results from application of non-destructive diagnostic test methods, i,e partial discharge- and dielectric response measurements as well as acoustic techniques, are to be compared to that obtained from destructive characterization tests, for example voltage endurance and electrical breakdown tests, microscopy analysis and mechanical strength.

Qualification requirements

Postdoctoral fellow:

Applicants must hold a PhD degree within Electrical Power Engineering. Knowledge and experience in high voltage laboratory and good knowledge in high voltage insulation material is required. High motivation and good analytical and communication skills will be emphasized in the employment process.

Publication and experience are merited.

All applicants are required to submit 1-2 pages research proposal within the proposed research area.

Applicants must provide evidence of good English language skills, written and spoken. If your first language is not English, the following tests can be used as documentation: TOEFL, IELTS and Cambridge Certificate in Advanced English (CAE) or Cambridge Certificate of Proficiency in English (CPE). Minimum scores are:

  • TOEFL: 600 (paper-based test), 92 (Internet-based test)
  • IELTS: 6.5, with no section lower than 5.5 (only Academic IELTS test accepted)
  • CAE/CPE: grade B or A.

The appointment is to be made in accordance with the regulations in force concerning State Employees and Civil Servants and national guidelines for appointment as PhD, postdoctor and research assistant

NTNU is committed to following evaluation criteria for research quality according to The San Francisco Declaration on Research Assessment - DORA.

Personal characteristics

  • The ability to work in team and good communication skills will be emphasized in the employment process.

In the evaluation of which candidate is best qualified, emphasis will be placed on education, experience and personal suitability, as well as motivation, in terms of the qualification requirements specified in the advertisement

We offer

Salary and conditions

Postdoctoral candidates:
Postdoctoral candidates are remunerated in code 1352, and are normally remunerated at gross from NOK 515 200 per annum. From the salary, 2% is deducted as a contribution to the Norwegian Public Service Pension Fund.

The period of employment is for 2 years.

The engagement is to be made in accordance with the regulations in force concerning State Employees and Civil Servants, and the acts relating to Control of the Export of Strategic Goods, Services and Technology. Candidates who by assessment of the application and attachment are seen to conflict with the criterias in the latter law will be prohibited from recruitment to NTNU. After the appointment you must assume that there may be changes in the area of work.

General information

A good work environment is characterized by diversity. We encourage qualified candidates to apply, regardless of their gender, functional capacity or cultural background. Under the Freedom of Information Act (offentleglova), information about the applicant may be made public even if the applicant has requested not to have their name entered on the list of applicants.

Questions about the position can be directed to Professor Arne or Professor Erling

About the application:

Applications are to be submitted electronically through this page (

The application should contain:

  • A project description (1-2 pages).
  • CV.
  • Certified copies of academic diplomas and certificates.
  • Applicants from universities outside Norway are kindly requested to send a diploma supplement or a similar document, which describes in detail the study and grading system and the rights for further studies associated with the obtained degree.
  • Publications relevant to the research scope and any other work which the applicant wishes to be taken into account should clearly state the applicant’s contribution. A short summary should be attached outlining the applicant’s input to joint work.
  • Names and contact information of at least two references.

Incomplete applications will not be taken into consideration.

Sensitivity related to critical infrastructure issues will be considered for all applicants.

Application deadline: May 31, 2019

NTNU - knowledge for a better world

The Norwegian University of Science and Technology (NTNU) creates knowledge for a better world and solutions that can change everyday life.

Department of Electric Power Engineering

Our department is Norway’s leading university environment in the field, and our vision is to be at the centre of the digital green shift. We have excellent collaboration with business and industry as well as other academic environments internationally. This gives us outstanding opportunities for interdisciplinary research with high relevance to society, while we meet industrial needs and address global challenges at the same time. The Department of Electric Power Engineering is one of seven departments in the Faculty of Information Technology and Electrical Engineering.

Deadline 19. May 2019
Employer NTNU - Norwegian University of Science and Technology
Municipality Trondheim
Scope Fulltime
Duration Temporary
Place of service Trondheim

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