Master–slave current regulation of an LCL-filter-based grid-connected inverter under variable grid condition

The Journal of Engineering

Yuqi Peng¹  Lijun Hang¹  Bangchao Wang¹  Yuanbin He¹ 

[1] Research Institute of Electrical Engineering and Automation, Hangzhou Dianzi University;

关键词: electric current control;    phase locked loops;    invertors;    power grids;    voltage-source convertors;    power conversion harmonics;    harmonics suppression;    inverter control;    line current regulation;    harmonic current suppression;    filter resonance suppression;    grid distortion suppression;    phase locked loop;    master–slave current regulation method;    variable grid condition;    grid-connected voltage-source inverter;    gc-vsi;    bidirectional voltage-source converter;    b-vsc;    inverter output;    grid impedance cancellation;    lcl-filter-based grid-connected inverter;    inverter system;    grid conditions;   

DOI  :  10.1049/joe.2019.0099

来源: DOAJ

【 摘 要 】

To ease the heavy burden of inverter control, including line current regulation, harmonic current suppression, filter resonance suppression, grid distortion suppression, phase locked loop etc., the study proposes a master–slave current regulation method for an LCL-filter-based grid-connected inverter operating under variable grid condition. The proposed system is composed of a grid-connected voltage-source inverter (GC-VSI) in series with a bidirectional voltage-source converter (B-VSC) at the inverter output. The GC-VSI is responsible for line current regulation, while the B-VSC takes charge of harmonic current suppression and grid impedance cancellation. Owing to low volt-ampere of the B-VSC, the efficiency of the inverter system is not sacrificed. To confirm its validity, a simulation platform with the proposed inverter system has been built. The simulation results demonstrate the performance enhancement of the proposed inverter system operating under different grid conditions.

【 授权许可】

Unknown