Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability
Grid-forming (GFM) inverters enable inverter-based resources to act as voltage sources, providing support to power systems. They are anticipated to serve as a technology capable of replacing synchronous generators. However, during a fault, it is crucial to implement a function that limits their outp...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of Power Electronics |
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| Online Access: | https://ieeexplore.ieee.org/document/10806746/ |
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| author | Dai Orihara Hisao Taoka Hiroshi Kikusato Jun Hashimoto Kenji Otani Rahman Khaliqur Taha Selim Ustun |
| author_facet | Dai Orihara Hisao Taoka Hiroshi Kikusato Jun Hashimoto Kenji Otani Rahman Khaliqur Taha Selim Ustun |
| author_sort | Dai Orihara |
| collection | DOAJ |
| description | Grid-forming (GFM) inverters enable inverter-based resources to act as voltage sources, providing support to power systems. They are anticipated to serve as a technology capable of replacing synchronous generators. However, during a fault, it is crucial to implement a function that limits their output current to prevent short circuit currents from exceeding their capacity. This raises concerns about the potential deterioration of transient stability in the power system. The influence of current limiting on transient stability depends on the current-limiting methodology. However, comprehensive theoretical evaluations are still lacking. This paper presents the theoretical evaluation of the influence of current limiting on transient stability for various current limitation algorithms. Accordingly, an equivalent virtual impedance (EVI) is proposed as a universal metric. EVI represents an impedance virtually assumed between the voltage source simulated in GFM control and the connection point of the inverter, and is computed so that the current through the EVI matches the limited output current. The transient stability is then assessed for various current-limiting algorithms based on the electric circuit characteristic of EVI. Finally, time-domain simulation is conducted to evaluate the consistency of the assessment. |
| format | Article |
| id | doaj-art-8ac0f7d9bea742d0a0f77fc54b62870d |
| institution | OA Journals |
| issn | 2644-1314 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-8ac0f7d9bea742d0a0f77fc54b62870d2025-08-20T02:09:34ZengIEEEIEEE Open Journal of Power Electronics2644-13142025-01-01610911910.1109/OJPEL.2024.352011110806746Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient StabilityDai Orihara0https://orcid.org/0000-0002-7373-4182Hisao Taoka1Hiroshi Kikusato2https://orcid.org/0000-0001-8415-977XJun Hashimoto3https://orcid.org/0000-0001-7627-3791Kenji Otani4https://orcid.org/0000-0002-2720-7357Rahman Khaliqur5Taha Selim Ustun6https://orcid.org/0000-0002-2413-8421National Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanNational Institute of Advanced Industrial Science and Technology, AIST, Koriyama, JapanGrid-forming (GFM) inverters enable inverter-based resources to act as voltage sources, providing support to power systems. They are anticipated to serve as a technology capable of replacing synchronous generators. However, during a fault, it is crucial to implement a function that limits their output current to prevent short circuit currents from exceeding their capacity. This raises concerns about the potential deterioration of transient stability in the power system. The influence of current limiting on transient stability depends on the current-limiting methodology. However, comprehensive theoretical evaluations are still lacking. This paper presents the theoretical evaluation of the influence of current limiting on transient stability for various current limitation algorithms. Accordingly, an equivalent virtual impedance (EVI) is proposed as a universal metric. EVI represents an impedance virtually assumed between the voltage source simulated in GFM control and the connection point of the inverter, and is computed so that the current through the EVI matches the limited output current. The transient stability is then assessed for various current-limiting algorithms based on the electric circuit characteristic of EVI. Finally, time-domain simulation is conducted to evaluate the consistency of the assessment.https://ieeexplore.ieee.org/document/10806746/Current limitinggrid formingpower systemshort circuit ratiotransient stabilityvirtual impedance |
| spellingShingle | Dai Orihara Hisao Taoka Hiroshi Kikusato Jun Hashimoto Kenji Otani Rahman Khaliqur Taha Selim Ustun Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability IEEE Open Journal of Power Electronics Current limiting grid forming power system short circuit ratio transient stability virtual impedance |
| title | Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability |
| title_full | Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability |
| title_fullStr | Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability |
| title_full_unstemmed | Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability |
| title_short | Theoretical Comparison of Current Limiting Algorithms in Grid-Forming Inverter in Terms of Transient Stability |
| title_sort | theoretical comparison of current limiting algorithms in grid forming inverter in terms of transient stability |
| topic | Current limiting grid forming power system short circuit ratio transient stability virtual impedance |
| url | https://ieeexplore.ieee.org/document/10806746/ |
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