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一种具有改进LCCL滤波器配置的并网逆变器高鲁棒性单环电流控制方案

A Highly Robust Single-Loop Current Control Scheme for Grid-Connected Inverter With an Improved LCCL Filter Configuration

语言:

中文摘要

针对LCL型并网逆变器,传统的单环电流控制在特定谐振频率下存在局限性。本文提出了一种改进的LCCL滤波器配置及相应的单环电流控制方案。通过将滤波电容分段处理,该方案简化了控制结构,降低了系统成本,同时显著提升了并网电流的鲁棒性,有效解决了谐振抑制问题。

English Abstract

Single-loop current control is an attractive scheme for the LCL-type grid-connected inverter due to its simplicity and low cost. However, conventional single-loop control schemes, which command either the inverter current or the grid current, are subject to the specific resonance frequency regions. The weighted average current control, which splits the filter capacitor into two parts (in form of a...
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SunView 深度解读

该研究直接针对阳光电源核心产品——组串式及集中式光伏逆变器的并网控制技术。LCL/LCCL滤波器是逆变器并网的关键环节,其谐振抑制直接影响电能质量和系统稳定性。该方案提出的单环控制策略在保证控制性能的同时简化了算法复杂度,有助于降低计算资源消耗,提升阳光电源逆变器在弱电网环境下的适应能力。建议研发团队评估该LCCL配置在下一代高功率密度组串式逆变器中的应用,以优化滤波体积并提升系统鲁棒性。