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Abstract
During severe grid faults, grid-following converters may become unstable and experience loss of synchronization when complying with requirements for low-voltage ride-through capability. This phenomenon is well described, understood, and modeled for single-converter systems but lacks a modeling framework when extended to multiconverter systems. To fill this gap, this work presents the necessary stability conditions and aggregated reduced-order models for different multiconverter configurations, which can be used to assess the transient synchronization stability of grid-following converters under symmetrical grid faults. The necessary conditions for transient stability and the aggregated models are verified through numerous simulation studies, which verify their high accuracy for large-signal synchronization stability assessment. To that end, the Anholt wind power plant is considered as a case study where the aggregated model is compared to the full operation of a wind farm string containing nine full-order grid-following converter models. High model accuracy is obtained, and the computational burden associated with the proposed model is reduced with a factor of 100 compared with a full-order representation on the tested system. Accordingly, the presented analysis and proposed modeling are attractive as a screening tool and a convenient approach for early-stage fault analysis of system design.
Original language | English |
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Article number | 9163174 |
Journal | I E E E Journal of Emerging and Selected Topics in Power Electronics |
Volume | 9 |
Issue number | 3 |
Pages (from-to) | 3150-3165 |
Number of pages | 16 |
ISSN | 2168-6777 |
DOIs | |
Publication status | Published - Jun 2021 |
Keywords
- Aggregated Modeling
- Analytical models
- Computational modeling
- Grid Faults
- Grid-Connected Converters
- Numerical stability
- Power system stability
- Reduced-Order Modeling
- Stability analysis
- Synchronization
- Synchronization Stability
- Transient Stability Analysis
- Transient analysis
Fingerprint
Dive into the research topics of 'Reduced-Order and Aggregated Modeling of Large-Signal Synchronization Stability for Multi-Converter Systems'. Together they form a unique fingerprint.Projects
- 2 Finished
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Synchronization Stability of Grid-Connected Converters under Grid Faults
Taul, M. G., Blaabjerg, F., Wang, X. & Davari, P.
01/09/2017 → 11/08/2020
Project: PhD Project
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REPEPS: REliable Power Electronic based Power System
Blaabjerg, F., Iannuzzo, F., Davari, P., Wang, H., Wang, X. & Yang, Y.
01/08/2017 → 01/12/2023
Project: Research
Research output
- 35 Citations
- 1 PhD thesis
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Synchronization Stability of Grid-Connected Converters under Grid Faults
Taul, M. G., 2020, Aalborg Universitetsforlag. 101 p.Research output: PhD thesis
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