基于自适应三次谐波注入的级联H桥逆变器直流侧电压纹波抑制策略

林珊; 赵涛; 农兴中; 朱泓钢; 王春芳

doi:10.19912/j.0254-0096.tynxb.2025-0213

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (6) : 120-130. DOI: 10.19912/j.0254-0096.tynxb.2025-0213

基于自适应三次谐波注入的级联H桥逆变器直流侧电压纹波抑制策略

林珊¹, 赵涛², 农兴中¹, 朱泓钢², 王春芳²

作者信息 +

DC-LINK VOLTAGE RIPPLE SUPPRESSION STRATEGY FOR CASCADED H-BRIDGE INVERTERS BASED ON ADAPTIVE THIRD-HARMONIC INJECTION

Lin Shan¹, Zhao Tao², Nong Xingzhong¹, Zhu Honggang², Wang Chunfang²

Author information +

文章历史 +

摘要

针对三相级联H桥拓扑直流侧电压会出现二倍电网电压频率的纹波问题,提出一种基于自适应三次谐波注入的控制策略,能够在功率因数角发生变化的情况下,有效避免过调制风险,并根据系统实时运行状态计算出最佳的三次谐波注入量,从而实现对直流侧电压纹波的最优抑制。该策略能够有效抑制光伏阵列偏离最大功率点运行的问题,从而提高系统的发电量。最后,构建全实物实验平台,并通过实验结果证明所提策略的有效性和可行性。

Abstract

The cascaded H-bridge topology exhibits distinct advantages in the field of photovoltaic （PV） power generation with its modular design, smaller filtering inductance, and simplified layout. However, the three-phase cascaded H-bridge inevitably inherits the inherent issue of the single-phase full-bridge inverter, namely, double-line frequency voltage ripple on the DC-link. This issue leads to an output voltage deviation of photovoltaic array from its maximum power point, thereby reducing the power generation efficiency of system. To address this issue, this paper presents an innovative control method based on adaptive third-harmonic injection, which effectively avoids over-modulation risks under varying power factor angles. The method can calculate the optimal third-harmonic injection based on the real-time operating conditions of the system, thereby achieving optimal suppression of DC-link voltage ripple. Finally, a full-scale experimental platform is constructed, and experimental results confirm the effectiveness and feasibility of the proposed method.

导出引用

林珊, 赵涛, 农兴中, 朱泓钢, 王春芳. 基于自适应三次谐波注入的级联H桥逆变器直流侧电压纹波抑制策略[J]. 太阳能学报. 2026, 47(6): 120-130 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0213

Lin Shan, Zhao Tao, Nong Xingzhong, Zhu Honggang, Wang Chunfang. DC-LINK VOLTAGE RIPPLE SUPPRESSION STRATEGY FOR CASCADED H-BRIDGE INVERTERS BASED ON ADAPTIVE THIRD-HARMONIC INJECTION[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 120-130 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0213

中图分类号： TM464

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