应用于谐波放大治理的统一阻抗适配器研究

doi:10.19912/j.0254-0096.tynxb.2021-0323

太阳能学报 ›› 2022, Vol. 43 ›› Issue (10): 518-523.DOI: 10.19912/j.0254-0096.tynxb.2021-0323

应用于谐波放大治理的统一阻抗适配器研究

李飞, 刘孟桃, 张兴, 马铭遥

合肥工业大学可再生能源接入电网技术国家地方联合工程实验室,合肥 230009

收稿日期:2021-03-28 出版日期:2022-10-28 发布日期:2023-04-28
通讯作者: 李飞（1984——）,男,博士、副教授,主要从事于基于电力电子变换技术的可再生能源并网系统控制策略、系统稳定性分析以及硬件在环实时仿真等方面研究。sandflylf@qq.com
基金资助:
国家自然科学基金（52177175; 51937003）; 高等学校学科创新引智计划资助（BP0719039）

RESEARCH ON UNIFIED ACTIVE DAMPER APPLIED TO HARMONIC AMPLIFICATION CONTROL

Li Fei, Liu Mengtao, Zhang Xing, Ma Mingyao

National and Local Joint Engineering Laboratory for Renewable Energy Access to Grid Technology, Hefei University of Technology, Hefei 230009, China

Received:2021-03-28 Online:2022-10-28 Published:2023-04-28

摘要/Abstract

摘要： 在高渗透率电网环境下,多逆变器并网系统更易出现谐波放大甚至失稳的问题。众多学者致力于通过并联阻抗适配器来缓解这个问题,但其既不易实现过小阻抗的虚拟,也无法有效抑制电网背景噪声的放大。针对上述问题,提出统一阻抗适配器,弥补并联阻抗适配器的不足。首先基于阻抗模型对弱网下多逆变器电网络耦合系统的谐波放大机理进行分析,明确了系统谐波放大甚至失稳的原因——系统欠阻尼特征和谐波源。其次介绍了并联阻抗适配器解决上述问题的机理与不足之处。再次,提出一种在并网点虚拟谐波段串并联阻抗相结合的统一阻抗适配器,解决系统谐波放大问题,提高并网电流的质量。最后搭建RT-LAB硬件在环仿真实验平台,验证了所提方案的有效性。

关键词: 逆变器, 谐波分析, 硬件在环, 阻抗适配器

Abstract: In the high permeability grid environment, the multi-inverter grid-connected system is more prone to harmonic amplification or even instability. Many scholars are committed to alleviating this problem by parallel active damper, but it is not easy to realize the virtual of small impedance and can not effectively suppress the amplification of grid background noise. In view of the above shortcomings, a unified active damper is proposed to make up for the shortcomings of the parallel active damper. Firstly, based on the impedance model, the harmonic amplification mechanism of the electrical network coupling system of multi-inverter under weak network is analyzed, and the reasons of the harmonic amplification and even instability of the system, the harmonic source of the system and underdamping characteristics is clarified. Secondly, the mechanism and shortcomings of parallel impedance damper to solve the above problems are introduced. Thirdly, a unified active damper combining series-parallel impedance in the virtual harmonic segment of the grid-connected point is proposed to solve the problem of harmonic amplification of the system and to improve the quality of the grid-connected current. Finally, RT-LAB HIL simulation platform is built to verify the effectiveness of the proposed scheme.

中图分类号:

TM46

李飞, 刘孟桃, 张兴, 马铭遥. 应用于谐波放大治理的统一阻抗适配器研究[J]. 太阳能学报, 2022, 43(10): 518-523.

Li Fei, Liu Mengtao, Zhang Xing, Ma Mingyao. RESEARCH ON UNIFIED ACTIVE DAMPER APPLIED TO HARMONIC AMPLIFICATION CONTROL[J]. Acta Energiae Solaris Sinica, 2022, 43(10): 518-523.

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应用于谐波放大治理的统一阻抗适配器研究

RESEARCH ON UNIFIED ACTIVE DAMPER APPLIED TO HARMONIC AMPLIFICATION CONTROL

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