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基于电感估计模型的单相LCL并网逆变器直接数字控制

Direct Digital Control of Single-Phase Grid-Connected Inverters With LCL Filter Based on Inductance Estimation Model

语言:

中文摘要

软磁粉芯因高饱和磁通密度和低损耗常用于滤波器电感,但其电流相关的非线性电感特性给LCL并网逆变器的控制带来挑战。本文探讨了电感变化难题,并提出了一种改进的直接数字控制策略以提升系统性能。

English Abstract

Soft magnetic powder cores with their high saturation flux density and low core loss are excellent alternatives for filter inductors in inverter-based applications. However, their nonlinear current-dependent inductance characteristics pose a challenge for control of grid-connected inverter with LCL filter. In this paper, the variable inductance conundrum is discussed and a modified direct digital ...
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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中LCL滤波器的设计与控制难题。在追求高功率密度和轻量化的趋势下,软磁粉芯电感应用广泛,但其非线性特性易导致并网电流谐波超标或系统失稳。该控制策略可有效提升阳光电源户用及工商业逆变器在电网波动下的鲁棒性,优化滤波性能,降低对昂贵线性电感的依赖,从而在保证电能质量的同时进一步优化产品成本与体积。