Summary
This paper investigates PLL loss of synchronism in wind power plants within an area with high penetration of converter-connected generation. Typically, fault ride through performance has been analysed for close-in faults, with focus on individual power plants. However, loss of synchronism can occur because of remote faults, when multiple power plants enter FRT-mode simultaneously and the grid is sufficiently weak.
Read more Read lessThis study was performed with EMT simulations on a wide-area model of around 3000 buses and 200 wind power plants. Three-phase-to-ground faults were simulated on critical transmission lines and potential disconnection of power plants was analysed. Results showed that some remote faults can cause multiple power plants to lose synchronism and trip.
Mitigation methods for this issue were also analysed. The studied solutions were converter parameter changes, additional SynCons and GFM batteries. All these solutions were found to be effective, since all of them can reduce the temporary increase in local frequency and resulting phase angle difference between the local voltage vector and the grid. The most effective solution was converter parameter changes.
The findings in this study highlighted the importance of wide-area EMT models and simulations of remote faults to study the FRT behaviour of converter-connected power plants.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C4_12625_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Serbia |
| Study committees |
|
| File size | 976 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
HYTTI Valtteri - Fingrid Oyj Finland
Keywords
Converter-connected generation, fault ride through, loss of synchronism, PLL
