LCL并网逆变器离散域电流控制策略

李原; 杨淑英; 张兴

doi:10.19912/j.0254-0096.tynxb.2024-0420

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (7) : 247-258. DOI: 10.19912/j.0254-0096.tynxb.2024-0420

第二十七届中国科协年会学术论文

LCL并网逆变器离散域电流控制策略

李原, 杨淑英, 张兴

作者信息 +

DISCRETE DOMAIN CURRENT CONTROL STRATEGY OF LCL GRID-CONNECTED INVERTER

Li Yuan, Yang Shuying, Zhang Xing

Author information +

文章历史 +

摘要

以LCL型并网逆变器为研究对象,提出离散域状态空间融合电容电压前馈的控制器,在提升系统动态响应的同时,可有效降低电网电压背景谐波的影响。并且推导出控制器的解析表达式,从而控制算法可根据物理参数自动调优。最后通过实验验证提出的离散域电流控制器的动态性能和背景谐波抑制能力以及稳定性。

Abstract

The grid-connecteds inverter usually adopt digital control. However, the control delays and discretizatione errors will seriously affect the control performance, resulting in slow dynamic response, active damping failure, and grid voltage background harmonics. In view of the above problems, this paper proposes a discrete domain state space fusion capacitor voltage feedforward controller, which effectively reduces the influence of grid voltage background harmonics while improving the dynamic response of the system. At the same time, the analytical expression of the controller is derived, so that the control algorithm can be automatically tuned according to the physical parameters. Finally, the dynamic performance, background harmonic suppression ability and stability of the discrete domain current controller designed in this paper are verified by experiments.

导出引用

李原, 杨淑英, 张兴. LCL并网逆变器离散域电流控制策略[J]. 太阳能学报. 2025, 46(7): 247-258 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0420

Li Yuan, Yang Shuying, Zhang Xing. DISCRETE DOMAIN CURRENT CONTROL STRATEGY OF LCL GRID-CONNECTED INVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 247-258 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0420

中图分类号： TM464

参考文献

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