Abstract
Grid-forming voltage-source converter (GFM-VSC) may experience low-frequency resonances, such as synchronous resonance (SR) and sub-synchronous resonance (SSR), in the output power. This paper provides a comprehensive study on the low-frequency resonances with GFM-VSC systems and damping control methods. First, the causes of SR and SSR are discussed, highlighting the impacts of control interactions on the resonances. Then, a systematic study on the recent advancements in stabilizing control methods for SR and SSR is presented. Specific physical insights into different damping effects on SR and SSR under weak and stiff grid conditions are revealed and summarized. Further, experimental results comparing the dynamic performances of different damping controls are provided, corroborating the insights obtained in this study. Finally, perspectives on future research trends are shared.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Power Electronics |
| Volume | 39 |
| Issue number | 11 |
| Pages (from-to) | 14430-14447 |
| Number of pages | 18 |
| ISSN | 0885-8993 |
| DOIs | |
| Publication status | Published - 2024 |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- Control interactions
- Damping
- Grid forming
- Impedance
- Power generation
- Resonant frequency
- Vectors
- Voltage control
- grid-forming control
- stabilization
- sub-synchronous resonance
- synchronous resonance
- subsynchronous resonance (SSR)
- synchronous resonance (SR)