TY - JOUR
T1 - A hybrid AC/DC microgrid control system based on a virtual synchronous generator for smooth transient performances
AU - Liu, Jiannan
AU - Hossain, M. J.
AU - Lu, Junwei
AU - Rafi, F. H. M.
AU - Li, Hui
PY - 2018/9
Y1 - 2018/9
N2 - This paper presents a high-performance control strategy to support an optimised transient performance for a hybrid AC/DC microgrid system based on an improved virtual synchronous generator (VSG). The standard VSG is modified and an improved control strategy is developed. A pre-synchronization controller is embedded within the improved VSG controller for grid-connection use. In addition, this paper builds the small-signal model for the improved VSG controller in order to analyse the system's stability. A controller for the battery energy storage system is developed in order to assist the power output of the hybrid microgrid. The microgrid system is designed in a MATLAB/SIMULINK simulation environment based on the under-construction hybrid AC/DC microgrid system at Griffith University, Australia. A comparative study of droop control, conventional VSG control, and the improved VSG control is carried out under different possible transient cases. The pre-synchronization method is also tested. The simulation results show that the improved VSG control strategy is evidently able to ensure smooth variations in frequency, voltage and active power during transient cases.
AB - This paper presents a high-performance control strategy to support an optimised transient performance for a hybrid AC/DC microgrid system based on an improved virtual synchronous generator (VSG). The standard VSG is modified and an improved control strategy is developed. A pre-synchronization controller is embedded within the improved VSG controller for grid-connection use. In addition, this paper builds the small-signal model for the improved VSG controller in order to analyse the system's stability. A controller for the battery energy storage system is developed in order to assist the power output of the hybrid microgrid. The microgrid system is designed in a MATLAB/SIMULINK simulation environment based on the under-construction hybrid AC/DC microgrid system at Griffith University, Australia. A comparative study of droop control, conventional VSG control, and the improved VSG control is carried out under different possible transient cases. The pre-synchronization method is also tested. The simulation results show that the improved VSG control strategy is evidently able to ensure smooth variations in frequency, voltage and active power during transient cases.
KW - Hybrid AC/DC microgrid
KW - Transient response
KW - Virtual synchronous generator
KW - Pre-synchronization
UR - http://www.scopus.com/inward/record.url?scp=85047486895&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2018.05.014
DO - 10.1016/j.epsr.2018.05.014
M3 - Article
AN - SCOPUS:85047486895
SN - 0378-7796
VL - 162
SP - 169
EP - 182
JO - Electric Power Systems Research
JF - Electric Power Systems Research
ER -