Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators
Modern power systems are experiencing high penetration of voltage-source converter (VSC)-interfaced distributed energy resources and loads. Design, analysis, and reliable operation of such systems require extensive offline and real-time electromagnetic transient (EMT) simulations. This paper propose...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
|
| Series: | IEEE Open Journal of Power Electronics |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10820985/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832576720271572992 |
|---|---|
| author | Taleb Vahabzadeh Seyyedmilad Ebrahimi Juri Jatskevich |
| author_facet | Taleb Vahabzadeh Seyyedmilad Ebrahimi Juri Jatskevich |
| author_sort | Taleb Vahabzadeh |
| collection | DOAJ |
| description | Modern power systems are experiencing high penetration of voltage-source converter (VSC)-interfaced distributed energy resources and loads. Design, analysis, and reliable operation of such systems require extensive offline and real-time electromagnetic transient (EMT) simulations. This paper proposes discretized impedance-based modeling (DIBM) of VSCs for efficient time-domain transient analysis in state-variable (SV)-based EMT simulators. Specifically, the VSC-based systems are first represented as admittance-based models in Laplace domain, and then they are discretized and formulated to construct a Thévenin equivalent impedance matrix and history voltages that can be interfaced seamlessly with external systems in SV-based simulators. By replacing VSC subsystems with Thévenin equivalent circuits, the proposed DIBM technique significantly reduces the number of states and eliminates the need for fictitious snubbers that may be needed in SV-based EMT simulators for compatible interfacing. The effectiveness of the proposed DIBM approach over the conventional method that uses average value models of VSCs is demonstrated on a seven-bus VSC-based system in offline (MATLAB Simscape Electrical) and real-time (OPAL-RT) EMT simulators. It is verified that the proposed method enables high accuracy and larger simulation time steps while also significantly improving the overall computational performance. |
| format | Article |
| id | doaj-art-d7391f6bd4b141978f8d7980336d6422 |
| institution | Kabale University |
| issn | 2644-1314 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-d7391f6bd4b141978f8d7980336d64222025-01-31T00:02:16ZengIEEEIEEE Open Journal of Power Electronics2644-13142025-01-01621222710.1109/OJPEL.2024.352501910820985Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT SimulatorsTaleb Vahabzadeh0https://orcid.org/0009-0005-0306-8494Seyyedmilad Ebrahimi1https://orcid.org/0000-0002-7781-2280Juri Jatskevich2https://orcid.org/0000-0002-3069-327XElectric Power Engineers, LLC., Austin, TX, USASchool of Electrical Engineering and Computer Science, Washington State University, Pullman, WA, USAElectrical and Computer Engineering Department, University of British Columbia, Vancouver, BC, CanadaModern power systems are experiencing high penetration of voltage-source converter (VSC)-interfaced distributed energy resources and loads. Design, analysis, and reliable operation of such systems require extensive offline and real-time electromagnetic transient (EMT) simulations. This paper proposes discretized impedance-based modeling (DIBM) of VSCs for efficient time-domain transient analysis in state-variable (SV)-based EMT simulators. Specifically, the VSC-based systems are first represented as admittance-based models in Laplace domain, and then they are discretized and formulated to construct a Thévenin equivalent impedance matrix and history voltages that can be interfaced seamlessly with external systems in SV-based simulators. By replacing VSC subsystems with Thévenin equivalent circuits, the proposed DIBM technique significantly reduces the number of states and eliminates the need for fictitious snubbers that may be needed in SV-based EMT simulators for compatible interfacing. The effectiveness of the proposed DIBM approach over the conventional method that uses average value models of VSCs is demonstrated on a seven-bus VSC-based system in offline (MATLAB Simscape Electrical) and real-time (OPAL-RT) EMT simulators. It is verified that the proposed method enables high accuracy and larger simulation time steps while also significantly improving the overall computational performance.https://ieeexplore.ieee.org/document/10820985/Admittance-based modelingaverage-value model (AVM)discretizationEMT simulationimpedance-based modelinginterfacing |
| spellingShingle | Taleb Vahabzadeh Seyyedmilad Ebrahimi Juri Jatskevich Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators IEEE Open Journal of Power Electronics Admittance-based modeling average-value model (AVM) discretization EMT simulation impedance-based modeling interfacing |
| title | Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators |
| title_full | Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators |
| title_fullStr | Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators |
| title_full_unstemmed | Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators |
| title_short | Discretized Impedance-Based Modeling of Converter-Interfaced Energy Resources for State-Variable-Based Real-Time EMT Simulators |
| title_sort | discretized impedance based modeling of converter interfaced energy resources for state variable based real time emt simulators |
| topic | Admittance-based modeling average-value model (AVM) discretization EMT simulation impedance-based modeling interfacing |
| url | https://ieeexplore.ieee.org/document/10820985/ |
| work_keys_str_mv | AT talebvahabzadeh discretizedimpedancebasedmodelingofconverterinterfacedenergyresourcesforstatevariablebasedrealtimeemtsimulators AT seyyedmiladebrahimi discretizedimpedancebasedmodelingofconverterinterfacedenergyresourcesforstatevariablebasedrealtimeemtsimulators AT jurijatskevich discretizedimpedancebasedmodelingofconverterinterfacedenergyresourcesforstatevariablebasedrealtimeemtsimulators |