Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 37, Issue 4, Pages 3141-3144Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2022.3173160
Keywords
Equivalent circuitmodel; circular current limiter; grid-forming converter; transient stability
Categories
Funding
- European Union's Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie Grant [101031512]
- Marie Curie Actions (MSCA) [101031512] Funding Source: Marie Curie Actions (MSCA)
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This letter presents an equivalent circuit model for a grid-forming converter with a circular current limiter and investigates its transient stability. It is found that the inner control loop can be simplified as a voltage source behind an equivalent resistor. Theoretical analysis and experimental tests based on the proposed model demonstrate that the transient stability of a P - f droop-controlled grid-forming converter with the circular current limiter can be guaranteed when stable equilibrium points exist.
This letter develops an equivalent circuit model of a grid-forming (GFM) converter with a circular current limiter and analyzes its transient stability. It is revealed that the inner control loop can be simplified as a voltage source behind an equivalent resistor. Based on the developed model, theoretical analysis and experimental tests demonstrate that the transient stability of a P - f droop-controlled GFM converter with the circular current limiter can be assured whenever there exist stable equilibrium points.
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