TY - JOUR
T1 - Frequency restoration and oscillation damping of distributed VSGs in microgrid with low bandwidth communication
AU - Shi, Mengxuan
AU - Chen, Xia
AU - Zhou, Jianyu
AU - Chen, Yin
AU - Wen, Jinyu
AU - He, Haibo
N1 - © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
PY - 2021/3/31
Y1 - 2021/3/31
N2 - The virtual synchronous generator (VSG) provides a promising way to increase the inertia of inverter-based microgrids. However, when multiple VSGs are parallel in the grid, severe oscillations may be incurred. To address this problem, this article proposes a secondary frequency control for distributed VSGs with low bandwidth communication. The control can damp the oscillations and restore the frequency to the rated value without changing the virtual inertia provided by the VSGs. In addition, the proportional active power sharing is achieved by event-triggered communication mechanism, thereby reducing the communication burden considerably. The stability and Zeno-free behavior of the proposed control strategy are demonstrated by the ultimately uniformly bounded (UUB) theory. Simulations are conducted to verify the effectiveness of the proposed control strategy on the PSCAD/EMTDC platform.
AB - The virtual synchronous generator (VSG) provides a promising way to increase the inertia of inverter-based microgrids. However, when multiple VSGs are parallel in the grid, severe oscillations may be incurred. To address this problem, this article proposes a secondary frequency control for distributed VSGs with low bandwidth communication. The control can damp the oscillations and restore the frequency to the rated value without changing the virtual inertia provided by the VSGs. In addition, the proportional active power sharing is achieved by event-triggered communication mechanism, thereby reducing the communication burden considerably. The stability and Zeno-free behavior of the proposed control strategy are demonstrated by the ultimately uniformly bounded (UUB) theory. Simulations are conducted to verify the effectiveness of the proposed control strategy on the PSCAD/EMTDC platform.
KW - oscillators
KW - microgrids
KW - damping
KW - frequency control
KW - power system stability
KW - synchronous generators
KW - decentralized control
KW - virtual synchronous generator (VSG)
KW - oscillation damping
KW - frequency restoration
KW - event-triggered mechanism
U2 - 10.1109/TSG.2020.3030022
DO - 10.1109/TSG.2020.3030022
M3 - Article
SN - 1949-3053
VL - 12
SP - 1011
EP - 1021
JO - IEEE Transactions on Smart Grid
JF - IEEE Transactions on Smart Grid
IS - 2
ER -