TY - JOUR
T1 - Improvement of Frequency Regulation in VSG-Based AC Microgrid via Adaptive Virtual Inertia
AU - Hou, Xiaochao
AU - Sun, Yao
AU - Zhang, Xin
AU - Lu, Jinghang
AU - Wang, Peng
AU - Guerrero, J. M.
PY - 2020/2
Y1 - 2020/2
N2 - A virtual synchronous generator (VSG) control based on adaptive virtual inertia is proposed to improve dynamic frequency regulation of microgrid. When the system frequency deviates from the nominal steady-state value, the adaptive inertia control can exhibit a large inertia to slow the dynamic process and, thus, improve frequency nadir. And when the system frequency starts to return, a small inertia is shaped to accelerate system dynamics with a quick transient process. As a result, this flexible inertia property combines the merits of large inertia and small inertia, which contributes to the improvement of dynamic frequency response. The stability of the proposed algorithm is proved by Lyapunov stability theory, and the guidelines on the key control parameters are provided. Finally, both hardware-in-the-loop and experimental results demonstrate the effectiveness of the proposed control algorithm.
AB - A virtual synchronous generator (VSG) control based on adaptive virtual inertia is proposed to improve dynamic frequency regulation of microgrid. When the system frequency deviates from the nominal steady-state value, the adaptive inertia control can exhibit a large inertia to slow the dynamic process and, thus, improve frequency nadir. And when the system frequency starts to return, a small inertia is shaped to accelerate system dynamics with a quick transient process. As a result, this flexible inertia property combines the merits of large inertia and small inertia, which contributes to the improvement of dynamic frequency response. The stability of the proposed algorithm is proved by Lyapunov stability theory, and the guidelines on the key control parameters are provided. Finally, both hardware-in-the-loop and experimental results demonstrate the effectiveness of the proposed control algorithm.
KW - Microgrids
KW - Power system stability
KW - Frequency control
KW - Synchronous generators
KW - Reactive power
KW - Stability analysis
KW - Transient analysis
KW - AC microgrid
KW - adaptive virtual inertia
KW - frequency stability
KW - virtual synchronous generator (VSG)
KW - AC microgrid
KW - Adaptive virtual inertia
KW - Frequency stability
KW - Virtual synchronous generator (VSG)
KW - frequency stability
KW - adaptive virtual inertia
KW - virtual synchronous generator (VSG)
UR - http://www.scopus.com/inward/record.url?scp=85075613176&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2923734
DO - 10.1109/TPEL.2019.2923734
M3 - Journal article
SN - 0885-8993
VL - 35
SP - 1589
EP - 1602
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 8741094
ER -