Paper Info
Title
Grid Current Harmonic Suppression for Motor Drive with Reduced DC-Link Capacitance in Weak Grid
Abstract
Motor drives with reduced DC-link capacitance may face grid current distortion or even instability under weak grid condition. In this paper, the small signal model of reduced DC-link capacitance drive system under weak grid condition is derived and analyzed. On this basis, an impedance reshaping method is proposed to suppress the harmonics of the grid-side current. By extracting DC-link harmonics near the LC resonant frequency and reconstructing the virtual admittance of the drive, the active damping voltage control signal is generated to suppress the harmonic of the grid-side current at the specific frequency. The THD of the grid-side current was reduced from 53% to 39%. The experiment was carried out on a 5.5kW permanent magnet motor drive platform with reduced DC-link capacitance, and the effectiveness of the control strategy was verified by experiments.
Year
DOI
Venue
2021
10.1109/IECON48115.2021.9589448
IECON 2021 - 47TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
Keywords
DocType
ISSN
reduced DC-link capacitance, weak grid, grid-side current harmonic suppression, impedance reshaping
Conference
1553-572X
Citations 
PageRank 
References 
0
0.34
0
Authors
6
Name
Order
Citations
PageRank
Zekun Ren100.34
Gaolin Wang210416.33
Dawei Ding300.34
Guoqiang Zhang401.01
Nannan Zhao500.68
DianGuo Xu62230.76