[1]刘海洋,董亮辉,高金峰,等.LCL型并网逆变器电压谐波抑制策略研究[J].郑州大学学报(工学版),2022,43(01):97-102.[doi:10.13705/j.issn.1671-6833.2021.05.023]
　LIU Haiyang,DONG Lianghui,GAO Jinfeng,et al.Research on Current Harmonic Suppression Strategy of the LCL Grid-connected Inverter[J].Journal of Zhengzhou University (Engineering Science),2022,43(01):97-102.[doi:10.13705/j.issn.1671-6833.2021.05.023]
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LCL型并网逆变器电压谐波抑制策略研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年01期
页码:
97-102
栏目:
出版日期:
2022-01-09

文章信息/Info

Title:
Research on Current Harmonic Suppression Strategy of the LCL Grid-connected Inverter
作者:
刘海洋; 董亮辉; 高金峰; 王要强; 黄文剑
郑州大学电气工程学院;

Author(s):
LIU Haiyang;  DONG Lianghui;  GAO Jinfeng;  WANG Yaoqiang;  HUANG Wenjian
School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China
关键词:
Keywords:
LCL filter;  resonant frequency;  grid-connected inverter;  feedforward control of grid voltage;  parameter design
分类号:
TM464
DOI:
10.13705/j.issn.1671-6833.2021.05.023
文献标志码:
A
摘要:
当电网电压存在背景谐波时，LCL型并网逆变器的并网电流会产生明显的畸变。为了抑制电网电压背景谐波对并网电流的影响，对LCL型并网逆变器电压谐波抑制策略进行研究，在电网电压比例前馈控制策略的基础上，分析LCL型并网逆变器逆变侧电感值以及滤波电容值对电网电压比例前馈控制策略的影响，对两者进行综合性考虑。实验结果表明：减小逆变侧电感以及滤波电容均会增强电网电压比例前馈控制策略对电网电压背景谐波的的抑制能力，并且减小滤波电容拥有更好的抑制能力和更优良的经济特性。
Abstract:
The increasing number of nonlinear devices increased the harmonic content of grid voltage background and led to the grid-connected current distortion of inverter. In order to suppress grid-connected current harmonics, an improved grid voltage proportional-feedforward control strategy was proposed. The influence of inverter side inductance and filter capacitance on grid voltage proportional-feedforward control strategy of LCL grid-connected inverter was analyzed, and the optimal selection method of inverter side inductance and filter capacitor was obtained. That was to say, according to the performance requirements and equipment safety requirements of the inverter, the range of inductance and filter capacitor on the inverter side of LCL grid-connected inverter was determined, and the appropriate inductance value was determined accordingly. Then the harmonic content of grid-connected current was reduced by selecting a smaller capacitance value. Finally, the effectiveness of the control strategy and optimization method was verified in the prototype of LCL grid-connected inverter. The experimental results showed that the total harmonic distortion rate of grid-connected current of LCL grid-connected inverter was reduced from 4.04% to 2.58%, and the third and fifth harmonics with higher harmonic content were reduced from 2% to less than 1%, which improved the performance of the inverter.

参考文献/References:

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更新日期/Last Update: 2022-01-09