TY - GEN
T1 - Damping Control and Improvement of Grid-Forming Inverter from a Wideband Stability Perspective
AU - Kong, Rui
AU - Song, Yubo
AU - Sahoo, Subham
AU - Blaabjerg, Frede
PY - 2025/5/1
Y1 - 2025/5/1
N2 - Small-signal stability assessment and damping control of grid-forming (GFM) converter are limited to specific frequency bands, lacking comprehensive verification of wideband stability improvement. This paper aims to reveal the impact of different damping control methods from a wideband stability perspective and provide an integrated solution. An impedance model considering coupled control loops is developed in the dq frame to extract dominant oscillation modes in both low and high-frequency bands. Then, candidate damping control methods such as virtual resistor and feedforward compensation are compared to reveal their different damping impacts on wideband oscillation modes and possible side effects. Based on the assessment results, an appropriate solution is selected for wideband stability improvement. The findings of this work are verified under experimental conditions.
AB - Small-signal stability assessment and damping control of grid-forming (GFM) converter are limited to specific frequency bands, lacking comprehensive verification of wideband stability improvement. This paper aims to reveal the impact of different damping control methods from a wideband stability perspective and provide an integrated solution. An impedance model considering coupled control loops is developed in the dq frame to extract dominant oscillation modes in both low and high-frequency bands. Then, candidate damping control methods such as virtual resistor and feedforward compensation are compared to reveal their different damping impacts on wideband oscillation modes and possible side effects. Based on the assessment results, an appropriate solution is selected for wideband stability improvement. The findings of this work are verified under experimental conditions.
KW - Grid-tied converter
KW - damping control
KW - grid-forming control
KW - small-signal stability
UR - http://www.scopus.com/inward/record.url?scp=105004808484&partnerID=8YFLogxK
U2 - 10.1109/APEC48143.2025.10977067
DO - 10.1109/APEC48143.2025.10977067
M3 - Article in proceeding
SP - 696
EP - 702
BT - 2025 IEEE Applied Power Electronics Conference and Exposition (APEC)
CY - Atlanta, GA, USA
ER -