Decoupling Control of Circulating Current Suppression and Current Distortion Elimination for the Paralleled Vienna-Type Rectifiers

In paralleled Vienna-type rectifiers, the challenges of circulating current suppression and current distortions around zero-crossing points (CDAZCP) elimination are coupling and inevitable, which decreases the grid currents quality. Thus, this paper proposes a decoupling control scheme to suppress t...

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Bibliographic Details
Main Authors: Han, Wanqing, Li, Xiaoyan, Qin, Changwei, Pang, Xianzhe, Zhang, Chenghui
Format: Conference Proceeding
Language:English
Subjects:
accurate real-time compensation of reactive current
Circulating current suppression
Couplings
current distortions around zero-crossing points (CDAZCP)
Distortion
Energy conversion
fixed-time control
paralleled Vienna-type rectifiers
Real-time systems
Rectifiers
Steady-state
Transient analysis
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Summary:In paralleled Vienna-type rectifiers, the challenges of circulating current suppression and current distortions around zero-crossing points (CDAZCP) elimination are coupling and inevitable, which decreases the grid currents quality. Thus, this paper proposes a decoupling control scheme to suppress the circulating current and eliminate CDAZCP simultaneously. First, the causes of CDAZCP and the circulating current are analyzed in detail. Based on the analysis, the accurate real-time compensation reactive current is derived and injected into the reference current to eliminate the current distortions, which does not affect the circulating current. Then, a fixed-time control strategy is designed to suppress the circulating current in both steady state and transient state. The proposed method realizes the decoupling control of circulating current and CDAZCP, and the feasibility of the proposed scheme is verified by simulation and experimental results.
ISSN:2329-3748
DOI:10.1109/ECCE50734.2022.9947685