TY - GEN
T1 - Modeling of D-Q Small-Signal Impedance of Virtual Synchronous Generator
AU - Wang, Shike
AU - Liu, Zeng
AU - Liu, Jinjun
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/26
Y1 - 2018/12/26
N2 - Virtual synchronous generators (VSGs) are widely employed as power sources in three-phase AC power electronic system. In order to analyze the small-signal stability of VSG, it is imperative to construct its analytical model. However, the impedance-based small-signal modeling issue of VSG is seldom discussed in existing works. To fill this gap, this paper conducts a full analytical model for the dq- frame small-signal output impedance of VSG, considering the dynamics of droop mechanism and virtual inertia. The small-signal model of power stage, external power control loop and internal voltage and current controllers are derived successively. Then, the accuracy of the analytical model is validated by measurement results in SABER. Based on the generalized Nyquist Criterion (CNC), the stability of VSG working in grid-connected mode is analyzed using this proposed impedance model. Finally, simulation results verify the analysis.
AB - Virtual synchronous generators (VSGs) are widely employed as power sources in three-phase AC power electronic system. In order to analyze the small-signal stability of VSG, it is imperative to construct its analytical model. However, the impedance-based small-signal modeling issue of VSG is seldom discussed in existing works. To fill this gap, this paper conducts a full analytical model for the dq- frame small-signal output impedance of VSG, considering the dynamics of droop mechanism and virtual inertia. The small-signal model of power stage, external power control loop and internal voltage and current controllers are derived successively. Then, the accuracy of the analytical model is validated by measurement results in SABER. Based on the generalized Nyquist Criterion (CNC), the stability of VSG working in grid-connected mode is analyzed using this proposed impedance model. Finally, simulation results verify the analysis.
KW - impedance
KW - small-signal model
KW - stability
KW - virtual synchronous generator
UR - https://www.scopus.com/pages/publications/85060975463
U2 - 10.1109/PEAC.2018.8590285
DO - 10.1109/PEAC.2018.8590285
M3 - 会议稿件
AN - SCOPUS:85060975463
T3 - Proceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
BT - Proceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
Y2 - 4 November 2018 through 7 November 2018
ER -