Hjörtur Jóhannsson

  1. 2015
  2. Published

    Early Prevention Method for Power System Instability. / Dmitrova, Evgenia; Wittrock, Martin Lindholm; Jóhannsson, Hjörtur; Nielsen, Arne Hejde.

    In: IEEE Transactions on Power Systems, Vol. 30, No. 4, 2015, p. 1784-1792.

    Publication: Research - peer-reviewJournal article – Annual report year: 2015

  3. Accepted/In press

    Evaluation of HVDC interconnection models for considering its impact in real-time voltage stability assessment. / Perez, Angel; Jóhannsson, Hjörtur; Lund, P.; Østergaard, Jacob.

    Proceedings of MEPS 2015. IEEE, 2015.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2015

  4. Accepted/In press

    Improved method for considering PMU’s uncertainty and its effect on real-time stability assessment methods based on Thevenin equivalent. / Perez, Angel; Jóhannsson, Hjörtur; Østergaard, Jacob; Martin, Kenneth .

    Proceedings of PowerTech Eindhoven 2015. IEEE, 2015.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2015

  5. Accepted/In press

    Thevenin Equivalent Method for Dynamic Contingency Assessment. / Møller, Jakob Glarbo; Jóhannsson, Hjörtur; Østergaard, Jacob.

    Proceedings of IEEE Power & Energy Society's General Meeting 2015. IEEE, 2015.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2015

  6. Accepted/In press

    Wind farms generation limits and its impact in real-time voltage stability assessment. / Perez, Angel; Jóhannsson, Hjörtur; Østergaard, Jacob.

    Proceedings of PowerTech Eindhoven 2015. IEEE, 2015.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2015

  7. 2014
  8. Published

    Computation of Steady State Nodal Voltages for Fast Security Assessment in Power Systems. / Møller, Jakob Glarbo; Jóhannsson, Hjörtur; Østergaard, Jacob.

    Proceedings of IEEE Electric Power Quality and Supply Reliability Conference 2014. IEEE, 2014. p. 51-55.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  9. Published

    Early Prediction of Transient Voltage Sags caused by Rotor Swings. / Weckesser, Johannes Tilman Gabriel; Jóhannsson, Hjörtur; Van Cutsem, Thierry.

    Proceedings of the 2014 IEEE PES General Meeting . IEEE, 2014.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  10. Published

    Evaluation of enhancements to Thevenin equivalent based methods for real-time voltage stability assessment. / Perez, Angel; Jóhannsson, Hjörtur; Østergaard, Jacob.

    Proceedings of 5th IEEE PES Innovative Smart Grid Technologies . IEEE, 2014.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

  11. Published

    On-line Dynamic Security Assessment in Power Systems.. / Weckesser, Johannes Tilman Gabriel; Jóhannsson, Hjörtur (Supervisor); Østergaard, Jacob (Supervisor).

    Technical University of Denmark, Department of Electrical Engineering, 2014. 182 p.

    Publication: ResearchPh.D. thesis – Annual report year: 2015

  12. Published

    Sensitivity based Assessment of Transient Voltage Sags caused by Rotor Swings. / Weckesser, Johannes Tilman Gabriel; Jóhannsson, Hjörtur; Østergaard, Jacob; Van Cutsem, Thierry.

    Proceedings of 18th Power Systems Computation Conference (PSCC'14). IEEE, 2014.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2014

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