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基于线性卡尔曼滤波、极限环振荡器和复带通滤波器的单相FLL:电网应用中的分析与标准FLL对比

Single-Phase FLLs Based on Linear Kalman Filter, Limit-Cycle Oscillator, and Complex Bandpass Filter: Analysis and Comparison With a Standard FLL in Grid Applications

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中文摘要

本文探讨了频率锁定环(FLL)在单相电网同步中的应用。文章对比分析了基于线性卡尔曼滤波、极限环振荡器及复带通滤波器的FLL方案,并与标准SOGI-FLL进行了性能评估,旨在提升单相并网系统在复杂电网环境下的同步精度与鲁棒性。

English Abstract

Frequency-locked loops (FLLs) create a rather large category of closed-loop synchronization techniques, which have received considerable attention in different engineering applications, particularly for synchronization, signal processing, and control purposes. Focusing on single-phase grid applications, designing FLLs is often based on a second-order generalized integrator (SOGI), and the SOGI-FLL...
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SunView 深度解读

该研究直接服务于阳光电源户用及工商业单相光伏逆变器产品线。在弱电网或电网电压畸变环境下,高精度的同步算法是确保逆变器稳定并网的关键。线性卡尔曼滤波等先进FLL方案能显著提升系统对电网频率波动的跟踪速度和抗干扰能力,有助于优化阳光电源iSolarCloud平台下的电能质量监测。建议研发团队在下一代单相逆变器控制策略中引入此类高性能同步算法,以增强产品在复杂电网环境下的适应性和并网稳定性。