王辉

副教授 博士生导师 硕士生导师

入职时间:2016-09-08

所在单位:自动化学院

职务:professor

学历:博士研究生毕业

办公地点:中南大学校本部民主楼105

性别:男

联系方式:wanghuicp9@csu.edu.cn

学位:博士学位

在职信息:在职

主要任职:副教授 博导

其他任职:无

毕业院校:中南大学

学科:电气工程

曾获荣誉:

2020-12-18  当选:  省部级——中国有色金属工业科学技术奖一等奖——电解铜箔生产自动化关键技术及应用

2018-02-27  当选:  省部级——自然科学奖二等奖——矩阵变换器系统的基础理论研究

2019-08-01  当选:  第十四届中国研究生电子设计竞赛——优秀指导教师——国家一等奖

2021-04-07  当选:  湖湘青年英才

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Single-Sensor Control of LCL-Filtered Grid-Connected Inverters

发布时间:2021-07-29

点击次数:

影响因子:3.367

DOI码:10.1109/ACCESS.2019.2906239

发表刊物:IEEE Access

关键字:Active damping; linear quadratic regulator; multi-resonant controller; reduced-order observer; state-space control

摘要:Owing to the filter resonance and background harmonics, the current control for the LCL-filtered grid-connected inverter should be carefully designed to ensure stable operation. Prior-art current control methods normally require extra sensors to achieve the damping of the resonance, or sophisticated active damping should be employed. Both increase the overall system cost and complexity. In this context, an improved control strategy is proposed for LCL-filtered inverters. The proposed control method utilizes a novel reduced-order observer in a way that only one current sensor is required for stable operation (i.e., resonance and harmonics are effectively attenuated). More specifically, the reduced-order observer embeds the dynamics of the grid voltage, where the estimated grid information is used for synchronization in a phase-locked loop. The estimated state variables of the observer are then used for the controller design. Furthermore, to achieve active damping and suppress the influence of grid voltage distortions on the current quality, a multi-resonant state-space controller is proposed, where a linear quadratic regulator method is employed to obtain the optimal gain. The simulations and experimental tests are performed on a 3-kW grid-connected inverter system with an LCL filter. The results demonstrate the effectiveness of the proposed method in terms of robust active damping and strong harmonic attenuation, and thus the inverter achieves a good power quality with only one current sensor.

合写作者:Cheng, Bin, Sun, Yao, Tang, Zhongting, Guo, Bin, Yang, Yongheng, Blaabjerg, Frede

第一作者:Su, Mei

论文类型:期刊论文

通讯作者:Wang, Hui*

论文编号:18575975

学科门类:工学

一级学科:电气工程

文献类型:J

卷号:7

页面范围:38481-38494

ISSN号:2169-3536

是否译文:

发表时间:2019-07-01

收录刊物:SCI、EI

发布期刊链接:http://libdb.csu.edu.cn/rwt/EI/https/P75YPLUFN3UXT5UFMW3GT5UHP3VXZ5DBM7TT6Z5QNF/search/doc/detailed.url?SEARCHID=9d4c9369de3e4f769dc452d202955cf2&DOCINDEX=1&database=16826499&pageType=quickSearch&sear

附件:

  • Single-Sensor Control of LCL-Filtered Grid-Connected Inverters.pdf

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