Summary
Negative sequence support (NSS) functions are required during faults and unbalanced grid conditions in terms of power quality and grid support. During asymmetrical faults, the current limiting control (CLC) is essential for safe converter control. However, the chosen NSS function, the CLC design, and the grid-forming (GFM) control strategy are highly co-dependent and determine the overall fault-ride through (FRT) performance, which motivate the present comparative study.
Read more Read lessThe work provides a brief overview of the most common NSS functions with substantially different fault responses and its foundation in instantaneous power theory. On this basis, a comparative study is carried out of asymmetrical fault responses of a 2-level GFM controlled voltage source converter (VSC) connected to the grid via an LC-filter and a Ynd11 transformer.
This work further compares the fault response of different NSS functions, assesses the grid code compliance for different CLC strategies, displays the capability of active and reactive current priority during asymmetrical faults, and summarizes the current limiting performance of the investigated CLCs.
It is found that, to comply with IEEE 2800 and VDE 4120 standards, while achieving the best current limiting performance, the CLC must include a negative sequence priority.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C4_11713_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Denmark |
| Study committees |
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| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
VILMANN Benjamin - Technical University of Denmark; MÜLLER Daniel - Technical University of Denmark; SABORÍO-ROMANO Oscar - Technical University of Denmark; ZOGHDAR Behrouz - TotalEnergies; EL-SIED Moataz - TotalEnergies
