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基于重复预测控制的弱电网下LCL型并网逆变器自适应策略

An Adaptive Strategy Based on Repetitive Predictive Control for Improving Adaptability of LCL-Type Grid-Connected Inverters Under Weak Grid

语言:

中文摘要

针对LCL型并网逆变器,全反馈控制虽能提升输出阻抗以抑制电网电压畸变和阻抗影响,但现有策略复杂且难以精确补偿控制延迟。本文提出一种基于重复预测控制的自适应策略,旨在提升逆变器在弱电网条件下的适应性与稳定性。

English Abstract

For current-controlled grid-connected inverters with LCL filter, the essence of grid voltage full feedback is to improve the output impedance of grid-connected inverters to infinity, which can eliminate the influences of grid voltage distortion and the non-negligible grid impedance. However, existing full feedforward strategies are complex and control delay cannot be compensated precisely, which l...
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SunView 深度解读

该技术直接服务于阳光电源的核心产品线——组串式及集中式光伏逆变器。随着全球光伏电站向弱电网区域(如偏远地区、高比例可再生能源接入点)扩展,电网阻抗波动导致的并网稳定性问题日益突出。该重复预测控制策略能有效提升逆变器在弱电网下的鲁棒性,减少对复杂电网参数辨识的依赖。建议研发团队将其集成至iSolarCloud智能运维平台下的控制算法库中,并应用于新一代组串式逆变器,以提升产品在复杂电网环境下的电能质量与并网性能,增强市场竞争力。