TY - JOUR
T1 - Dynamic Coupling Mechanism Analysis Between Voltage and Frequency in Virtual Synchronous Generator System
AU - Cheng, Huijie
AU - Li, Chang
AU - Mohammad Ghias, Amer Mohammad Yusuf
AU - Blaabjerg, Frede
PY - 2024/1
Y1 - 2024/1
N2 - This letter investigates the dynamic coupling mechanism between voltage and frequency in a virtual synchronous generator (VSG) system, where a unified model is proposed for the analysis of voltage stability, frequency stability and voltage-frequency coupled stability. The results show that voltage/frequency stability is impacted by both self- and coupled-dynamics. Moreover, voltage and frequency oscillate at the same oscillation frequency if the voltage-frequency coupled instability occurs. However, the frequency oscillation occurs while voltage magnitude maintains stability if voltage self-dynamics behaves a negative feedback effect. The time-domain simulation is performed to validate the rationality of the theoretical analysis.
AB - This letter investigates the dynamic coupling mechanism between voltage and frequency in a virtual synchronous generator (VSG) system, where a unified model is proposed for the analysis of voltage stability, frequency stability and voltage-frequency coupled stability. The results show that voltage/frequency stability is impacted by both self- and coupled-dynamics. Moreover, voltage and frequency oscillate at the same oscillation frequency if the voltage-frequency coupled instability occurs. However, the frequency oscillation occurs while voltage magnitude maintains stability if voltage self-dynamics behaves a negative feedback effect. The time-domain simulation is performed to validate the rationality of the theoretical analysis.
KW - Virtual synchronous generator
KW - unified model
KW - dynamic coupling mechanism
KW - voltage stability
KW - frequency stability
UR - http://www.scopus.com/inward/record.url?scp=85181588016&partnerID=8YFLogxK
U2 - 10.1109/TPWRS.2023.3328153
DO - 10.1109/TPWRS.2023.3328153
M3 - Letter
SN - 0885-8950
VL - 39
SP - 2365
EP - 2368
JO - I E E E Transactions on Power Systems
JF - I E E E Transactions on Power Systems
IS - 1
M1 - 10298795
ER -