Independent-phase current control of a three-phase VSC under unbalanced operating conditions
| Autor: | Xianghua Shi, Shaahin Filizadeh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
phase locked loops
power convertors voltage control electric current control power control unbalanced operating conditions independent phase-current-control architecture three-phase voltage source converter PLLs dual-loop scheme ac voltage control second-order generalised integrator-based PLL phase-tracking angle active power control inner current control loops three-phase VSC single-phase phase locked loops imbalance-induced distortions half-bridge modular multilevel converter PSCAD/EMTDC power 500 MW voltage 500 kV Engineering (General). Civil engineering (General) TA1-2040 |
| Zdroj: | The Journal of Engineering (2018) |
| Druh dokumentu: | article |
| ISSN: | 2051-3305 |
| DOI: | 10.1049/joe.2018.8768 |
| Popis: | This study presents an independent phase-current-control architecture for a three-phase voltage source converter. It comprises three independent single-phase phase locked loops (PLLs), and a dual-loop scheme including an outer loop (responsible for active power and ac voltage control) and three similar inner current control loops. To obtain reliable phase-tracking, an enhanced second-order generalised integrator-based PLL is developed. The phase-tracking angle is strategically selected from the three PLLs to minimise the impact of imbalance-induced distortions. To validate the proposed control scheme, extensive simulations are conducted for a 101-level, 500-MW, 500-kV (dc) half-bridge modular multi-level converter in PSCAD/EMTDC. The simulation results prove that the proposed scheme enables the system to ride through unbalanced conditions effectively and reliably. |
| Databáze: | Directory of Open Access Journals |
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