Transient Stability Analysis of Grid-Forming Converters with Current Limiting Considering Asymmetrical Grid Faults
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908665466847232 |
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| author | Kim, Seongyeon Kim, Ki-Hyun Cui, Shenghui Jung, Jae-Jung |
| author_facet | Kim, Seongyeon Kim, Ki-Hyun Cui, Shenghui Jung, Jae-Jung |
| contents | Under asymmetrical faults, analyzing the transient stability of grid-forming voltage-source converters (GFM-VSCs) becomes essential because their behavior fundamentally differs from that under symmetrical faults. When current limiting is activated under asymmetrical faults, the point-of-common-coupling voltage of a GFM-VSC contains both positive- and negative-sequence components, and the interaction between these components generates a non-negligible negative-sequence-driven active power. However, the transient stability of GFM-VSCs under asymmetrical faults has not been sufficiently investigated, and the influence of negative-sequence-driven active power remains unclear. Accordingly, this letter derives the P-δ curve of a GFM-VSC with an elliptical current limiter under asymmetrical faults by explicitly accounting for negative-sequence effects. This enables a more accurate transient stability assessment when extending conventional symmetrical-fault analyses to asymmetrical conditions. The theoretical analysis is validated by the agreement between the derived P-δ curve and both simulation and experimental results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_15286 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Transient Stability Analysis of Grid-Forming Converters with Current Limiting Considering Asymmetrical Grid Faults Kim, Seongyeon Kim, Ki-Hyun Cui, Shenghui Jung, Jae-Jung Systems and Control Under asymmetrical faults, analyzing the transient stability of grid-forming voltage-source converters (GFM-VSCs) becomes essential because their behavior fundamentally differs from that under symmetrical faults. When current limiting is activated under asymmetrical faults, the point-of-common-coupling voltage of a GFM-VSC contains both positive- and negative-sequence components, and the interaction between these components generates a non-negligible negative-sequence-driven active power. However, the transient stability of GFM-VSCs under asymmetrical faults has not been sufficiently investigated, and the influence of negative-sequence-driven active power remains unclear. Accordingly, this letter derives the P-δ curve of a GFM-VSC with an elliptical current limiter under asymmetrical faults by explicitly accounting for negative-sequence effects. This enables a more accurate transient stability assessment when extending conventional symmetrical-fault analyses to asymmetrical conditions. The theoretical analysis is validated by the agreement between the derived P-δ curve and both simulation and experimental results. |
| title | Transient Stability Analysis of Grid-Forming Converters with Current Limiting Considering Asymmetrical Grid Faults |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2511.15286 |