Paper Info
Title
A New Unbalanced Voltage Compensation Method Based on HOPF Oscillator for Three-Phase DC/AC Inverters With Unbalanced Loads
Abstract
In islanded microgrids, distributed generators (DGs) are employed as distributed compensators to improve the power quality on the load side. Due to the access of unbalanced loads, the low-voltage microgrid will naturally exhibit three-phase unbalance, which may cause additional power losses and deteriorate power quality. Therefore, this paper proposes a novel unbalanced-voltage compensation control method based on the Hopf oscillator, which introduces the negative-sequence voltage and current into the traditional Hopf oscillator to achieve the negative sequence voltage droop characteristics. It can not only realize the negative sequence droop control of a single inverter, but it is also capable to support the reactive power automatic distribution between multi-parallel grid-forming inverters. Compared with the traditional unbalanced voltage compensation method based on filtered negative sequence reactive power, the proposed unbalanced voltage compensation method can slightly improve the dynamic response. Experimental results verify the effectiveness of the proposed control strategy.
Year
DOI
Venue
2022
10.1109/TSG.2022.3184911
IEEE Transactions on Smart Grid
Keywords
DocType
Volume
Grid-forming inverters,Hopf oscillator,unbalanced-voltage compensation
Journal
13
Issue
ISSN
Citations 
6
1949-3053
0
PageRank 
References 
Authors
0.34
10
5
Name
Order
Citations
PageRank
Siyi Luo100.34
Weimin Wu223643.97
Eftichios Koutroulis311.64
Henry S. H. Chung465337.43
Frede Blaabjerg500.34