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

Johannes Tilman Gabriel Weckesser, Valeri Franz, Eckhard Grebe, Thierry Van Cutsem

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This paper presents a novel approach, which identifies a buffer zone around a given study system and replaces the external system with an equivalent. The aim is to obtain a reduced system, which is suitable for assessment of long-term voltage and frequency dynamics in the study system. First, the proposed methodology ensures that all components, which are impacting the voltage profile of the study system, are included in the buffer zone. For that purpose, the propagation of reactive power changes from the boundary of the study system into the external system are used in a modified depth-first search algorithm to identify the buffer zone. Second, the external system is replaced with equivalents accounting for inertia and primary frequency control effects. The proposed method was successfully tested on a modified version of the ENTSO-E Dynamic Study Model.
Original languageEnglish
Title of host publicationProceedings of 2017 IEEE PowerTech
Number of pages6
Publication date2017
Publication statusPublished - 2017
Externally publishedYes
Event12th IEEE Power and Energy Society PowerTech Conference: Towards and Beyond Sustainable Energy Systems - University Place, University of Manchester., Manchester, United Kingdom
Duration: 18 Jun 201722 Jun 2017


Conference12th IEEE Power and Energy Society PowerTech Conference
LocationUniversity Place, University of Manchester.
CountryUnited Kingdom


  • Model Reduction
  • Equivalent
  • Dynamic security assessment
  • Long-term voltage dynamics
  • Frequency dynamics

Cite this

Weckesser, J. T. G., Franz, V., Grebe, E., & Van Cutsem, T. (2017). A Model Reduction Approach for Simulation of Long-term Voltage and Frequency Dynamics. In Proceedings of 2017 IEEE PowerTech IEEE. https://doi.org/10.1109/PTC.2017.7980843