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一种用于LCL型并网逆变器网侧电感电压反馈有源阻尼的等效微分法

An Equivalent Differential Method for Active Damping of LCL Type Grid-Connected Inverters With Grid-Side Inductor Voltage Feedback

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中文摘要

本文提出了一种针对LCL型并网逆变器网侧电感电压反馈的有源阻尼等效微分方法。相比电容电流反馈,该方法能有效提升逆变器输出阻抗,增强对电网背景谐波的抑制能力。针对微分环节带来的噪声敏感问题,文章通过等效变换优化了控制结构,提升了系统在弱电网下的稳定性和鲁棒性。

English Abstract

The differential feedback of grid-side inductor voltage can effectively increase the damping of grid-connected inverters. Compared with proportional feedback of filter capacitor current, it can increase the output impedance of the grid-connected inverters, which is more conducive to reducing the impact of grid background harmonics on the grid-in current. However, there is a differential link in it...
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SunView 深度解读

该技术对阳光电源的组串式和集中式光伏逆变器产品线具有极高应用价值。随着光伏电站接入弱电网场景增多,LCL滤波器的谐振抑制成为提升并网稳定性的关键。该等效微分法不仅能有效抑制谐振,还能通过提升输出阻抗改善电能质量,减少电网谐波干扰。建议在iSolarCloud智能运维平台监控到电网谐波异常的区域,通过固件升级引入该控制策略,以增强逆变器在复杂电网环境下的适应能力,进一步巩固阳光电源在电网友好型逆变器领域的技术领先地位。