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考虑锁相环频率耦合效应的单相并网逆变器输出阻抗建模

Output Impedance Modeling of Single-Phase Grid-Tied Inverters With Capturing the Frequency-Coupling Effect of PLL

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中文摘要

本文研究了考虑锁相环(PLL)频率耦合效应的单相并网逆变器输出阻抗建模,旨在实现精确的稳定性分析。通过构建多频导纳矩阵(MAM),利用广义奈奎斯特判据预测逆变器-电网系统的稳定性,为解决复杂电网环境下的振荡问题提供了理论基础。

English Abstract

The output impedance model for the precise stability analysis on the single-phase grid-tied inverters considering the frequency-coupling effect of the phase-locked loop (PLL) is studied. A multifrequency admittance matrix (MAM) is developed to predict the inverter-grid system stability by applying the generalized Nyquist criterion. Based on the MAM, a novel output impedance model characterized by ...
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SunView 深度解读

该研究直接针对阳光电源核心产品——组串式及户用光伏逆变器的并网稳定性问题。在弱电网或高比例可再生能源接入场景下,PLL引起的频率耦合是导致系统谐振和不稳定的关键因素。通过引入多频导纳矩阵(MAM)建模,阳光电源研发团队可更精准地优化逆变器控制环路参数,提升产品在复杂电网环境下的鲁棒性,减少现场谐振故障,并为iSolarCloud智能运维平台提供更深层的电网适应性评估依据,确保系统长期稳定运行。