On-line dynamic security assessment in power systems

The fraction of electricity generated from renewable energy technologies utilizing non-controllable and on forecast accuracy depending sources (e.g. wind and solar radiation) is increasing. This will make today’s tools for stability assessment, which depend on extensive off-line computations, insufficient. Phasor measurement units (PMUs) can provide synchronized wide-area measurements in real time, which forms a basis for development of new methods for online monitoring of the system conditions.

The PhD project is part of the SOSPO project and its objective is to develop a method, which utilizes those synchronized measurements to dynamically evaluate the stability of the power system in case of facing a severe perturbation, e.g. a loss of a generation unit. The method analyses the ability of the power system to survive the transient system response as well as its capability to reach a new stable steady-state operating point.

The project outcome will improve the system state awareness of the operator and may provide supporting information to identify efficient control actions to improve the stability condition.

Project co-funded by the Danish Council for Strategic Research  I  To be completed: 2014 

Publikationer rss feed

2026
 

Co-optimising grid reinvestments and reinforcement to support distribution grid planning

Hørby Thellefsen, Caroline ; Dyrbøl Jensen, Sara Lea ; Handreck, Nicolai ; Skalyga, Mikhail ; Jensen, Louise C. ; Weckesser, Tilman
Presented at:
CIRED 2026 Brussels Workshop

Type: Paper (Peer reviewed)

Status: Published     |    Year: 2026

2025
  PDF

Energy Crisis in 2022: When consumers discovered their flexibility and the consequences for modeling consumption

Bak, Bjarke S. ; Eriksen, Michael L. ; Bindner, Henrik W. ; Weckesser, Tilman
part of: Proceedings of 2025 IEEE Kiel PowerTech, 2025
Presented at:
2025 IEEE PES Power Tech Conference

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1109/PowerTech59965.2025.11180721

  PDF

Impact of Evolving EV Charging Profiles on Distribution Grid Reinforcement: A Case Study

Weckesser, Tilman ; Skalyga, Mikhail ; Bjerregaard, Casper
part of: Proceedings of 2024 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE), 2025
Presented at:
IEEE PES Innovative Smart Grid Technologies Europe 2024

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1109/ISGTEUROPE62998.2024.10863431

  PDF

Impact of limited information on estimating aggregated electric vehicle loading: A distribution system operator perspective

Cheilas, Damianos ; Bindner, Henrik W. ; Weckesser, Tilman
in: Sustainable Energy, Grids and Networks, vol: 44

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1016/j.segan.2025.102012

 

Investigating the benefit of flexibility services in distribution grids under uncertainty

Cheilas, Damianos ; Bindner, Henrik W. ; Weckesser, Tilman
in: Sustainable Energy, Grids and Networks, vol: 41

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1016/j.segan.2024.101582

  PDF

Navigating Grid Challenges: Voltage-Reactive Power Control in the Integration of Power-to-X Facilities

Riofrio, Jonathan ; You, Shi ; Weckesser, Tilman
part of: Proceedings of 2024 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE), 2025
Presented at:
IEEE PES Innovative Smart Grid Technologies Europe 2024

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1109/ISGTEUROPE62998.2024.10863080

 

Scaling Digital Real-Time Models of Alkaline Electrolyzers for Power Grid Integration

Trujillo, Jonathan Riofrio ; Prabakar, Kumaraguru ; Jain, Rishabh ; You, Shi ; Weckesser, Tilman ; Hammond, Steve
part of: Proceedings of 2025 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe), 2025
Presented at:
IEEE PES ISGT Europe 2025

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1109/ISGTEurope64741.2025.11305650

  PDF

Which electric vehicle users are flexible and price responsive? Uncovering user types in Denmark

Chatzouli, Margarita ; Weckesser, Tilman ; Yousefi, Ghaffar ; Thingvad, Malthe ; Calearo, Lisa ; Marinelli, Mattia ; Ziras, Charalampos
in: Energy Research and Social Science, vol: 127

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2025     |    DOI: https://doi.org/10.1016/j.erss.2025.104240

2024
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A Framework for Assessing the Participation of Aggregated Flexible Loads in Power Markets

Tajalli, Seyede Zahra ; Weckesser, Tilman ; Bindner, Henrik W.
part of: Proceedings of 2024 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 2024
Presented at:
2024 Conference on Innovative Smart Grid Technologies, North America

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2024     |    DOI: https://doi.org/10.1109/ISGT59692.2024.10454245

  PDF

An empirical analysis of electric vehicle charging behavior based on real Danish residential charging data

Ziras, Charalampos ; Thingvad, Malthe ; Fog, Torben ; Yousefi, Ghaffar ; Weckesser, Tilman
in: Electric Power Systems Research, vol: 234

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2024     |    DOI: https://doi.org/10.1016/j.epsr.2024.110556

  PDF

Cost minimization of a hybrid PV-to-methanol plant through participation in reserve markets: A Danish case study

Andreae, Elisabeth ; Johnsen, Andrea Gloppen ; Reinert, Rolvur ; Mortensen, Mathias Holbæk ; Weckesser, Tilman
in: International Journal of Hydrogen Energy, vol: 68, pages: 190-201

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2024     |    DOI: https://doi.org/10.1016/j.ijhydene.2024.04.158

 

Danish Electric Vehicle Charging Profiles for Distribution Grid Planning and Design

Weckesser, Tilman ; Odgaard, Jonathan Henius ; Yousefi, Ghaffar ; Thingvad, Malthe ; Ziras, Charalampos
Presented at:
CIRED 2024 Vienna Workshop

Type: Paper (Peer reviewed)

Status: Published     |    Year: 2024

  PDF

Providing tools and analysis for RE integration in emerging economics

Müller, Daniel ; Weckesser, Tilman ; Bindner, Henrik ; Jóhannsson, Hjörtur
Report name: Providing tools and analysis for RE integration in emerging economics, (ISBN: 978-87-87335-73-7), pages: 68-73

Type: Report chapter

Status: Published     |    Year: 2024     |    DOI: https://doi.org/10.11581/DTU.00000343

 

Rule-based Local Distribution Grid Design Tool

Tajalli, Seyede Zahra ; Gehrke, Oliver ; Weckesser, Tilman
Presented at:
22nd International Conference on Intelligent Systems Applications to Power Systems

Type: Paper (Peer reviewed)

Status: Published     |    Year: 2024

  PDF

Towards Sustainable Energy Transition: Guidelines for Wind Energy Expansion and Power-to-X Integration in Small Island States

Riofrio, Jonathan ; Andreae, Elisabeth ; Nyholm, Asger ; Træholt, Chresten ; Weckesser, Tilman ; You, Shi ; Tróndheim, Helma Maria
part of: Book of Abstracts 2024 International Conference on Smart Energy Systems , pages: 76, 2025
Presented at:
10th International Conference on Smart Energy Systems

Type: Conference abstract in proceedings (Peer reviewed)

Status: Published     |    Year: 2024

2023
 

A methodology for the evaluation of congestion induced costs in distribution grid operation

Cheilas, Damianos ; Bindner, Henrik W. ; Weckesser, Tilman
part of: Proceedings of 27th International Conference on Electricity Distribution, 2023
Presented at:
27th International Conference on Electricity Distribution

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2023

 

Power-to-X (PtX) integration in modern power systems: exploring grid code compliance and technical requirements in Denmark and the United Kingdom

Riofrio, Jonathan ; You, Shi ; Weckesser, Tilman
part of: Proceedings of 22nd Wind and Solar Integration Workshop (WIW 2023), pages: 5-14, 2023
Presented at:
22nd Wind and Solar Integration Workshop

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2023     |    DOI: https://doi.org/10.1049/icp.2023.2712

2022
  PDF

Coincidence Factors for Domestic EV Charging from Driving and Plug-in Behavior

Bollerslev, Jacob ; Andersen, Peter Bach ; Jensen, Tue Vissing ; Marinelli, Mattia ; Thingvad, Andreas ; Calearo, Lisa ; Weckesser, Tilman
in: IEEE Transactions on Transportation Electrification, vol: 8, issue: 1, pages: 808 - 819

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2022     |    DOI: https://doi.org/10.1109/TTE.2021.3088275

  PDF

Frequency dynamics of the Northern European AC/DC power system: a look-ahead study

Obradovic, Danilo ; Dijokas, Matas ; Misyris, Georgios ; Weckesser, Tilman ; Van Cutsem, Thierry
in: IEEE Transactions on Power Systems, vol: 37, issue: 6, pages: 4661-4672

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2022     |    DOI: https://doi.org/10.1109/TPWRS.2022.3154720

  PDF

Zero-inertia Offshore Grids: N-1 Security and Active Power Sharing

Misyris, Georgios ; Tosatto, Andrea ; Chatzivasileiadis, Spyros ; Weckesser, Tilman
in: IEEE Transactions on Power Systems, vol: 37, issue: 3, pages: 2052 - 2062

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2022     |    DOI: https://doi.org/10.1109/TPWRS.2021.3113274

2021
 

Grid-forming converters: Sufficient conditions for RMS modeling

Misyris, George S. ; Chatzivasileiadis, Spyros ; Weckesser, Tilman
in: Electric Power Systems Research, vol: 197

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2021     |    DOI: https://doi.org/10.1016/j.epsr.2021.107324

  PDF

Sharing reserves through HVDC: Potential cost savings in the Nordic countries

Tosatto, Andrea ; Dijokas, Matas ; Weckesser, Tilman ; Chatzivasileiadis, Spyros ; Eriksson, Robert
in: IET Generation Transmission and Distribution, vol: 15, issue: 3, pages: 480-494

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2021     |    DOI: https://doi.org/10.1049/gtd2.12035

2020
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Grid Supporting VSCs in Power Systems with Varying Inertia and Short-Circuit Capacity

Misyris, Georgios ; Mermet Guyennet, Jeanne Anais ; Chatzivasileiadis, Spyros ; Weckesser, Johannes Tilman Gabriel
part of: Proceedings of IEEE PES PowerTech 2019, 2018
Presented at:
13th IEEE PowerTech Milano 2019

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2020     |    DOI: https://doi.org/10.1109/PTC.2019.8810979

  PDF

Market Integration of HVDC Lines: Cost Savings from Loss Allocation and Redispatching

Tosatto, Andrea ; Dijokas, Matas ; Obradović , D. ; Weckesser, Tilman ; Eriksson, R. ; Josefsson, J. ; Krontiris, A. ; Ghandhari, M. ; Østergaard, Jacob ; Chatzivasileiadis, Spyros
part of: Proceedings of CIGRE 2020, 2020
Presented at:
CIGRE 2020

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2020

  PDF

North Sea Wind Power Hub: System Configurations, Grid Implementation and Techno-economic Assessment

Misyris, Georgios ; Van Cutsem, Thierry ; Møller, Jakob Glarbo ; Dijokas, Matas ; Renom Estragues, Ona ; Bastin, B. ; Chatzivasileiadis, Spyros ; Nielsen, Arne Hejde ; Weckesser, Tilman ; Østergaard, Jacob ; Kryezi, F.
part of: Proceedings of CIGRE 2020, 2020
Presented at:
CIGRE 2020

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2020

  PDF

The multiDC project

Weckesser, Tilman ; Misyris, Georgios ; Obradovic, Danilo ; Tosatto, Andrea ; Eriksson, Robert ; Ghandhari, Mehrdad ; Bastin, Betrand ; van Cutsem, Thierry ; Chatzivasileiadis, Spyros
part of: Proceedings of 8th Conference on Sustainable Energy Supply and Energy Storage Systems, pages: 17-23, 2021
Presented at:
8th Conference on Sustainable Energy Supply and Energy Storage Systems

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2020

2019
  PDF

Market Integration of HVDC Lines: internalizing HVDC losses in market clearing

Tosatto, Andrea ; Weckesser, Johannes Tilman Gabriel ; Chatzivasileiadis, Spyros
in: IEEE Transactions on Power Systems, vol: 35, issue: 1, pages: 451 - 461

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2019     |    DOI: https://doi.org/10.1109/TPWRS.2019.2932184

2018
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Identifying Plausible Harmful N-k Contingencies: A Practical Approach based on Dynamic Simulations

Weckesser, Johannes Tilman Gabriel ; Van Cutsem, Thierry
part of: Proceedings of 20th Power System Computation Conference, 2018
Presented at:
20th Power Systems Computation Conference

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: https://doi.org/10.23919/PSCC.2018.8442654

 

Robust Frequency Control for Varying Inertia Power Systems

Misyris, George S. ; Chatzivasileiadis, Spyros ; Weckesser, Tilman
part of: Proceedings of 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe , pages: 1-6, 2018
Presented at:
2018 IEEE PES Innovative Smart Grid Technologies Conference Europe

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2018     |    DOI: https://doi.org/10.1109/ISGTEurope.2018.8571607

  PDF

Smart grids innovation challenge

Østergaard, Jacob ; Weckesser, Johannes Tilman Gabriel ; Bondy, Daniel Esteban Morales ; Nørgård, Per Bromand ; Pinson, Pierre ; Martini, Luciano ; Madsen, Henrik
part of: Accelerating the clean energy revolution - perspectives on innovation challenges, pages: 37-46, 2018

Type: Book chapter (Peer reviewed)

Status: Published     |    Year: 2018

2017
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A Decision Support Tool for Transient Stability Preventive Control

Pertl, Michael ; Weckesser, Johannes Tilman Gabriel ; Rezkalla, Michel M.N. ; Heussen, Kai ; Marinelli, Mattia
in: Electric Power Systems Research, vol: 147, pages: 88–96

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1016/j.epsr.2017.02.020

  PDF

Agent-based Identification and Control of Voltage Emergency Situations

Robitzky, Lena ; Weckesser, Johannes Tilman Gabriel ; Häger, Ulf ; Rehtanz, Christian ; Van Cutsem, Thierry
in: IET Generation Transmission and Distribution

Type: Journal article (Peer reviewed)

Status: Accepted/In press     |    Year: 2017

  PDF

A Model Reduction Approach for Simulation of Long-term Voltage and Frequency Dynamics

Weckesser, Johannes Tilman Gabriel ; Franz, Valeri ; Grebe, Eckhard ; Van Cutsem, Thierry
part of: Proceedings of 2017 IEEE PowerTech, 2017
Presented at:
12th IEEE Power and Energy Society PowerTech Conference

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1109/PTC.2017.7980843

  PDF

An Improved On-line Contingency Screening for Power System Transient Stability Assessment

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Glavic, Mevludin ; Østergaard, Jacob
in: Electric Power Components and Systems, vol: 45, issue: 8, pages: 852-863

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1080/15325008.2017.1310953

  PDF

Equivalent to Represent Inertial and Primary Frequency Control Effects of an External System

Weckesser, Johannes Tilman Gabriel ; Van Cutsem, Thierry
in: I E T Generation, Transmission and Distribution

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1049/iet-gtd.2016.1641

  PDF

Local Identification of Voltage Instability from Load Tap Changer Response

Weckesser, Johannes Tilman Gabriel ; Papangelis, Lampros ; Vournas, Costas D. ; Van Cutsem, Thierry
in: Sustainable Energy, Grids and Networks, vol: 9, pages: 95-103

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1016/j.segan.2017.01.001

  PDF

Searching for Plausible N-k Contingencies Endangering Voltage Stability

Weckesser, Johannes Tilman Gabriel ; Van Cutsem, Thierry
part of: Proceedings of 7th IEEE International Conference on Innovative Smart Grid Technologies, 2017
Presented at:
2017 IEEE PES Innovative Smart Grid Technologies Conference Europe

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2017

  PDF

Searching for Plausible N-k Contingencies Endangering Voltage Stability

Weckesser, Johannes Tilman Gabriel ; Van Cutsem, Thierry
Presented at:
2017 IEEE PES Innovative Smart Grid Technologies Conference Europe

Type: Sound/Visual production (digital) (Peer reviewed)

Status: Published     |    Year: 2017

  PDF

Transient stability improvement: a review and comparison of conventional and renewable-based techniques for preventive and emergency control

Pertl, Michael ; Weckesser, Johannes Tilman Gabriel ; Rezkalla, Michel M.N. ; Marinelli, Mattia
in: Electrical Engineering, vol: 100, issue: 3, pages: 1701-1718

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: https://doi.org/10.1007/s00202-017-0648-6

2016
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Real-time remedial action against aperiodic small signal rotor angle instability

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Østergaard, Jacob
in: IEEE Transactions on Power Systems, vol: 31, issue: 1, pages: 387-396

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: https://doi.org/10.1109/TPWRS.2015.2404872

2015
 

Critical machine cluster identification using the equal area criterion

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Østergaard, Jacob
part of: Proceedings of 2015 IEEE Power & Energy Society General Meeting, pages: 1-5, 2015
Presented at:
2015 IEEE Power & Energy Society General Meeting

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2015     |    DOI: https://doi.org/10.1109/PESGM.2015.7285937

 

Derivation and application of sensitivities to assess transient voltage sags caused by rotor swings

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Østergaard, Jacob ; Van Cutsem, Thieery
in: International Journal of Electrical Power & Energy Systems, vol: 72, issue: Special Issue, pages: 75-82

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2015     |    DOI: https://doi.org/10.1016/j.ijepes.2015.02.013

2014
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Early Prediction of Transient Voltage Sags caused by Rotor Swings

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Van Cutsem, Thierry
part of: Proceedings of the 2014 IEEE PES General Meeting , 2014
Presented at:
2014 IEEE PES General Meeting

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2014

  PDF

On-line Dynamic Security Assessment in Power Systems.

Weckesser, Johannes Tilman Gabriel

Type: Ph.D. thesis

Status: Published     |    Year: 2014

 

Sensitivity based Assessment of Transient Voltage Sags caused by Rotor Swings

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Østergaard, Jacob ; Van Cutsem, Thierry
part of: Proceedings of 18th Power Systems Computation Conference (PSCC'14), 2014
Presented at:
PSCC 2014

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2014     |    DOI: https://doi.org/10.1109/PSCC.2014.7038366

2013
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Impact of Model Detail of Synchronous Machines on Real-time Transient Stability Assessment

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Østergaard, Jacob
part of: Proceedings of 2013 IREP Symposium, 2013
Presented at:
2013 IREP Symposium

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2013     |    DOI: https://doi.org/10.1109/IREP.2013.6629364

  PDF

Method of determining remedial control actions for a power system in an insecure state

Jóhannsson, Hjörtur ; Weckesser, Johannes Tilman Gabriel
Patent no.: WO2013098184, Date: 2011-12-28

Type: Patent

Status: Published     |    Year: 2013

  PDF

Pattern-based Automatic Translation of Structured Power System Data to Functional Models for Decision Support Applications

Heussen, Kai ; Weckesser, Johannes Tilman Gabriel ; Kullmann, Daniel
part of: Proceedings of IWIES 2013, 2013
Presented at:
2013 IEEE International Workshop on Intelligent Energy Systems

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2013     |    DOI: https://doi.org/10.1109/IWIES.2013.6698579

2012
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Investigation of the Adaptability of Transient Stability Assessment Methods to Real-Time Operation

Weckesser, Johannes Tilman Gabriel ; Jóhannsson, Hjörtur ; Sommer, Stefan ; Østergaard, Jacob
part of: IEEE PES Innovative Smart Grid Technologies Conference Europe, 2012
Presented at:
3rd IEEE PES Innovative Smart Grid Technologies (ISGT) Europe Conference (IEEE PES ISGT Europe 2012)

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2012     |    DOI: https://doi.org/10.1109/ISGTEurope.2012.6465835

2011
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Real-Time Stability Assessment based on Synchrophasors

Jóhannsson, Hjörtur ; Garcia-Valle, Rodrigo ; Weckesser, Johannes Tilman Gabriel ; Nielsen, Arne Hejde ; Østergaard, Jacob
part of: IEEE PES Trondheim PowerTech, 2011
Presented at:
IEEE PES Trondheim PowerTech 2011

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2011


https://www.cee.elektro.dtu.dk/research/phd-projects/completed-phd-projects/11-15/2014-on-line-dynamic-security-assessment-in-power-systems?fr=1&id=54994&mr=100
20 MAY 2026