Paper Info
Title
Interaction analysis of vector- and droop-controlled VSCs in parallel
Abstract
Voltage source converters (VSCs) can be either vector-controlled to follow the variation of the primary energy sources, or droop-controlled to support the grid frequency/voltage. To meet both the local and system-level demand, hybrid operation of VSCs with the two control schemes is foreseen, while the dynamic interactions within such a system is less focused. This paper investigates the stability issues of a system with both types of VSCs in parallel connection to the main grid, particular attention is given to low-frequency outer power control dynamics. Net-damping criteria is used for qualitative stability evaluation. Comparative study with only vector-controlled case indicates that the hybrid controlled VSCs system can have a better stability for the smaller negative damping region presented. In addition, a potential low-frequency instability phenomenon, due to the interaction between the AC voltage control mode of vectored-controlled inverter and the droop control mode of droop-inverter, is identified by participation factor analysis. Detailed time-domain simulations are carried out to verify the above analysis.
Year
DOI
Venue
2019
10.1109/ISGT.2019.8791670
2019 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)
Keywords
Field
DocType
VSC,vector control,droop control,stability
Vector control,Inverter,Voltage source,Control theory,Computer science,Power control,Voltage,Converters,Frequency grid,Voltage droop
Conference
ISSN
ISBN
Citations 
2167-9665
978-1-5386-8233-3
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Dong Wang11351186.07
Xiaonan Lu200.34
Yunhe Hou311422.07