Abstract
This letter investigates the dynamic coupling mechanism between voltage and frequency in a virtual synchronous generator (VSG) system, where a unified model is proposed for the analysis of voltage stability, frequency stability and voltage-frequency coupled stability. The results show that voltage/frequency stability is impacted by both self- and coupled-dynamics. Moreover, voltage and frequency oscillate at the same oscillation frequency if the voltage-frequency coupled instability occurs. However, the frequency oscillation occurs while voltage magnitude maintains stability if voltage self-dynamics behaves a negative feedback effect. The time-domain simulation is performed to validate the rationality of the theoretical analysis.
| Original language | English |
|---|---|
| Article number | 10298795 |
| Journal | I E E E Transactions on Power Systems |
| Volume | 39 |
| Issue number | 1 |
| Pages (from-to) | 2365 - 2368 |
| Number of pages | 4 |
| ISSN | 0885-8950 |
| DOIs | |
| Publication status | Published - Jan 2024 |
Keywords
- Virtual synchronous generator
- unified model
- dynamic coupling mechanism
- voltage stability
- frequency stability