Abstract
Grid-forming inverters are the key enablers for the integration of inverter-based resources at scale. A critical component of grid-forming control architecture is the emulation of virtual impedance. However, virtual impedance implementation along with the inner current loops can affect the converter stability. To ensure harmonic stability under widely varying operating conditions, this paper analyzes the passivity of grid-forming inverter with virtual impedance and converter-side current loop. Effective converter admittance is derived from the control architecture and is then used to analyze the passivity properties of grid-forming inverters. Furthermore, a model-based delay-compensation method is proposed to increase the frequency range of passive behavior. The analysis is verified through Matlab/Simulink and Hardware-in-the-Loop real-time simulations.
Original language | English |
---|---|
Pages | 650-656 |
Number of pages | 7 |
DOIs | |
State | Published - 2022 |
Externally published | Yes |
Event | 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States Duration: Mar 20 2022 → Mar 24 2022 |
Conference
Conference | 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 |
---|---|
Country/Territory | United States |
City | Houston |
Period | 03/20/22 → 03/24/22 |
Funding
This work is supported by ARPA-E under DE-AR0000899 and the Center for Distributed Energy (CDE), Georgia Institute of Technology. The authors are grateful for the support provided by ARPA-E and Center for Distributed Energy (CDE) at Georgia Tech for this work.
Keywords
- Grid-forming
- active damping
- delay compensation
- passivity
- virtual impedance