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Hjörtur Jóhannsson

 https://orcid.org/0000-0003-0218-714X

  • Elektrovej, 325, 162

    2800 Kgs. Lyngby

    Denmark

20072021
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Research Output 2008 2019

84 Downloads (Pure)

A Memory-Efficient Parallelizable Method for Computation of Thévenin Equivalents used in Real-Time Stability Assessment

Jørgensen, C. H. L., Møller, J. G., Sommer, S. & Jóhannsson, H., 2019, In : I E E E Transactions on Power Systems. 34, 4, p. 2675-2684 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Open Access
File

Cascading outage assessment using thévenin equivalent static contingency assessment

Petersen, P. F., Oxholm, C., Moller, J. G. & Johannsson, H., 1 Jun 2019, Proceedings of 2019 IEEE Milan PowerTech. IEEE, 6 p. 8810917

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

158 Downloads (Pure)

Evaluation of Factorization Methods for Thévenin Equivalent Computations in Real-Time Stability Assessment

Hildebrandt, C., Karatas, B. C., Glarbo Muller, J. & Johannsson, H., 2018, Proceedings of 2018 Power Systems Computation Conference. IEEE, p. 7 pp. 7 p.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Open Access
File
138 Downloads (Pure)

Improved Voltage Stability Boundary Monitoring by Accounting for Variations in Thevenin Voltage Magnitude.

Karatas, B. C., Jóhannsson, H. & Nielsen, A. H., 2018, Proceedings of 8th IEEE PES Innovative Smart Grid Technologies Conference. IEEE, 6 p.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Open Access
File
114 Downloads (Pure)

Real-Time Early Warning and Early Prevention System to Avoid System Blackouts

Jóhannsson, H., 2018, Procedings of the 2018 IEEE PES General Meeting. IEEE, 5 p.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Open Access
File

Projects 2007 2021

Smart Wide Area Monitoring and Control for Secure Operation of Systems with high Penetration of renewable energy sources

Haugdal, H., Nielsen, A. H., Jóhannsson, H. & Uhlen, K.

01/01/2018 → 31/12/2021

Project: PhD

Development of methods for element-wise assessment of oscillatory rotor-angle stability

Müller, D., Nielsen, A. H., Jóhannsson, H. & Uhlen, K.

Technical University of Denmark

01/11/2017 → 31/10/2020

Project: PhD

High Performance Algorithms Enabling Real-Time Security Assessment of Sustainable Electric Power Systems

Jørgensen, C. H. L., Nielsen, A. H., Jóhannsson, H. & Sommer, S. H.

Samfinansieret - Andet

15/05/2017 → 14/05/2020

Project: PhD

Modelling of renewable energy under stressed power system stability conditions

Sarkar, M., Sørensen, P. E., Hansen, A. D., Jóhannsson, H. & Altin, M.

Samfinansieret - Andet

15/11/2016 → 14/02/2020

Project: PhD

SARP: Security Assessment of Renewable Power Systems

Jóhannsson, H., Sørensen, P. E., Karatas, B. C., Sarkar, M. & Jørgensen, C. H. L.

01/04/2016 → 31/03/2020

Project: Research

Activities 2011 2011

  • 2 Conference presentations

Udvikling af nye metoder for realtidsstabilitetsovervågning af elforsyningssystemer: PMU/WAMS seminar hos Energinet.dk

Hjörtur Jóhannsson (Speaker)
1 Jan 2011 → …

Activity: Talks and presentations › Conference presentations

Real-Time Stability Assessment based on Synchrophasors: IEEE PowerTech 2011

Hjörtur Jóhannsson (Speaker)
20 Jun 2011

Activity: Talks and presentations › Conference presentations