Abstract
This paper identifies stable resonance frequency range for grid-connected inverter with Grid-Voltage Feedforward Regulator (GVFR). Beginning with the current loop stability analysis without GVFR, system poles distribution is analytically studied in z-domain, the critical frequency is therefore calculated as well as the control gain limit. Then, this paper reveals the GVFR would change the system stability in the weak power system, two frequency boundaries and three typical resonance frequency ranges are identified and compared. System poles distribution shows that GVFR can offer damping effects when resonance frequency is below ωs/3, in contrast, over which GVFR will destabilize the system. The theoretical analysis is validated by experimental tests based on a laboratory-scale prototype.
Original language | English |
---|---|
Title of host publication | Proceedings of 2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL) |
Number of pages | 5 |
Publisher | IEEE Press |
Publication date | Jul 2017 |
ISBN (Electronic) | 978-1-5090-5326-1 |
DOIs | |
Publication status | Published - Jul 2017 |
Event | 18th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2017 - Stanford, United States Duration: 9 Jul 2017 → 12 Jul 2017 |
Conference
Conference | 18th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2017 |
---|---|
Country/Territory | United States |
City | Stanford |
Period | 09/07/2017 → 12/07/2017 |
Keywords
- Stability analysis
- Grid-connected inverter
- LCL-filter
- Grid-voltage feedforward