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基于全通滤波器的LCL滤波VSC弱电网有源阻尼控制

All-Pass-Filter-Based Active Damping for VSCs With LCL Filters Connected to Weak Grids

语言:

中文摘要

LCL滤波器常用于电压源逆变器(VSC)并网,但易引发谐振。本文提出一种基于全通滤波器的有源阻尼方法,旨在解决弱电网环境下LCL滤波器的谐振问题,在提升系统稳定性的同时保持高效率,避免了传统无源阻尼带来的额外损耗。

English Abstract

LCL filters are commonly used to connect voltage-sourced converters (VSCs) to the grid. This type of filter is cheaper than a single inductor for the same current total harmonic distortion (THD), but it generates resonance problems if no active or passive damping method is applied. Active damping methods are becoming popular in the literature because they improve efficiency, but they are sometimes...
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SunView 深度解读

该技术对阳光电源的组串式逆变器(SG系列)及集中式逆变器在弱电网场景下的应用具有重要参考价值。随着光伏电站向电网薄弱地区扩展,电网阻抗波动大,LCL谐振抑制是提升并网稳定性的关键。采用全通滤波器进行有源阻尼,无需增加额外硬件成本,符合阳光电源追求高效率、低成本的研发方向。建议研发团队在iSolarCloud智能运维平台中集成此类弱电网适应性诊断算法,并将其应用于新一代组串式逆变器的控制策略优化中,以增强产品在复杂电网环境下的电能质量表现。