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考虑线路阻抗的多并联SiC并网逆变器稳定且超快速控制及低电压穿越能力研究

A Stable and Ultrafast Control for Multiparallel Grid-Tied SiC Inverters With LVRT Capability Considering Cable Impedance

语言:

中文摘要

多并联并网逆变器在弱电网环境下,尤其是在低电压穿越(LVRT)期间的稳定性面临严峻挑战。基于SiC器件的逆变器虽具备高效率、高功率密度和快速动态响应优势,但其高带宽特性可能加剧并网系统的谐振与稳定性问题。本文提出了一种考虑线路阻抗的稳定且超快控制策略,以提升SiC逆变器在复杂电网条件下的运行可靠性。

English Abstract

The stability of multiparalleled grid-tied inverters remains a challenging issue especially during low-voltage ride-through (LVRT) in the presence of grid impedance. SiC device-based grid-tied inverters can achieve advantages such as higher efficiency, reduced size of interface filters, and fast dynamics; however, they can exacerbate this stability issue particularly when LVRT occurs along with hi...
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SunView 深度解读

该研究直接契合阳光电源组串式逆变器及PowerTitan储能变流器(PCS)的技术演进方向。随着SiC器件在高性能逆变器中的广泛应用,如何在高频开关带来的快速动态响应与弱电网环境下的稳定性之间取得平衡是核心难点。该控制策略可优化阳光电源逆变器在复杂电网下的LVRT性能,减少并联运行时的谐振风险,提升iSolarCloud智能运维平台在电网故障期间的监测与响应能力。建议研发团队将其应用于新一代高功率密度组串式逆变器,以应对日益复杂的弱电网接入场景。