一种单相Quasi-Z源逆变器二次谐波电流抑制策略

刘欣; 高鑫波; 袁静

doi:10.19912/j.0254-0096.tynxb.2023-0319

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (6) : 349-358. DOI: 10.19912/j.0254-0096.tynxb.2023-0319

一种单相Quasi-Z源逆变器二次谐波电流抑制策略

刘欣, 高鑫波, 袁静

作者信息 +

SECOND HARMONIC CURRENT SUPPRESSION STRATEGY FOR SINGLE-PHASE QUASI-Z SOURCE INVERTER

Liu Xin, Gao Xinbo, Yuan Jing

Author information +

文章历史 +

摘要

为抑制单相qZSI直流侧二次谐波电流,提出一种基于虚拟阻抗的二次谐波电流抑制策略。该控制策略通过引入串联虚拟阻抗附加控制以提高单相qZSI在2f₀处的闭环输出阻抗,用以有效抑制直流侧的二次谐波电流。同时,综合考虑二次谐波电流抑制要求以及保证系统稳定裕度等约束条件,提出该控制策略的闭环参数设计方法。最后通过数字仿真和基于RT-LAB的硬件在环仿真验证了所提二次谐波电流抑制策略以及其闭环参数设计方法的正确性。

Abstract

The second harmonic current in the DC link of single-phase quasi-Z-source inverter （qZSI） seriously affects the performance of the system and limits its application. Aiming at suppressing the second harmonic current at the DC side of single-phase qZSI, a new strategy based on virtual impedance is proposed. The control strategy increases the closed-loop output impedance of single-phase qZSI at 2f₀ by introducing an additional control process of the serial virtual impedance to effectively reduce the second harmonic current contents at the DC side. At the same time, a closed-loop parameter design method of the control strategy is proposed considering the constraints of the second harmonic current suppression requirement and the stability margin of the system. Finally, the correctness of the second harmonic current suppression strategy and its closed-loop parameter design method proposed in this paper are verified by digital simulation and RT-LAB based hardware-in-the-loop simulation.

导出引用

刘欣, 高鑫波, 袁静. 一种单相Quasi-Z源逆变器二次谐波电流抑制策略[J]. 太阳能学报. 2024, 45(6): 349-358 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0319

Liu Xin, Gao Xinbo, Yuan Jing. SECOND HARMONIC CURRENT SUPPRESSION STRATEGY FOR SINGLE-PHASE QUASI-Z SOURCE INVERTER[J]. Acta Energiae Solaris Sinica. 2024, 45(6): 349-358 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0319

中图分类号： TM615

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