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基于通用数学模型的LCL型并网逆变器电流控制方案分析与设计

Analysis and Design of Current Control Schemes for LCL-Type Grid-Connected Inverter Based on a General Mathematical Model

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中文摘要

本文针对LCL型并网逆变器,建立了涵盖网侧电流控制、逆变侧电感电流控制及加权平均电流控制的通用数学模型。通过该模型分析了三种控制方案的特性,为优化逆变器并网性能提供了理论依据。

English Abstract

For the LCL-type grid-connected inverter, there are basically three current control schemes, namely the grid current control, the inverter-side inductor current control, and the weighted average current control. This paper builds a general mathematical model to describe the three current control schemes. In this model, the grid current is an equivalent target control variable, the capacitor curren...
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SunView 深度解读

LCL滤波器是阳光电源组串式及集中式光伏逆变器的核心组件,其控制策略直接决定了并网电流质量与系统稳定性。本文提出的通用数学模型有助于研发团队在不同产品线(如SG系列组串式逆变器)中快速评估电流控制方案的鲁棒性。特别是在弱电网环境下,通过该模型优化加权平均电流控制参数,可有效抑制LCL谐振,提升逆变器对电网阻抗变化的适应能力,从而增强阳光电源产品在复杂电网环境下的并网可靠性。