Abstract
The low-frequency oscillation (LFO) problem of photovoltaic (PV) grid-connected systems has been a critical concern for safe operation, whereas the impact of dc-side components of PV plants are always ignored and single-stage PV plant is used. This paper performs a comprehensive analysis of the LFOs in the two-stage PV grid-connected system. The complete small-signal model of the two-stage PV system is built. On this basis, the LFO modes and high-frequency oscillation (HFO) modes are calculated and related participating components are determined. Then, the impact of key parameters on the LFO characteristics is investigated with the root locus analysis. The theoretical analysis is verified through PSCAD/EMTDC simulations.
| Original language | English |
|---|---|
| Journal | Energy Reports |
| Volume | 8 |
| Issue number | Suppl. 13 |
| Pages (from-to) | 241-248 |
| Number of pages | 8 |
| ISSN | 2352-4847 |
| DOIs | |
| Publication status | Published - Nov 2022 |
| Event | The 5th International Conference on Electrical Engineering and Green Energy, CEEGE 2022 - Berlin, Germany Duration: 8 Jun 2022 → 11 Jun 2022 http://ceege.org/ |
Conference
| Conference | The 5th International Conference on Electrical Engineering and Green Energy, CEEGE 2022 |
|---|---|
| Country/Territory | Germany |
| City | Berlin |
| Period | 08/06/2022 → 11/06/2022 |
| Internet address |
Bibliographical note
Funding Information:This work was financially supported by the Fundamental Research Funds for the Central Universities ( JZ2022HGQA0124 , JZ2022HGTA0330 , PA2022GDSK0070 ).
Publisher Copyright:
© 2022 The Author(s)
Keywords
- High-frequency oscillation
- Low-frequency oscillation
- Small-signal model
- Two-stage photovoltaic plant