发表机构
Universidad Politécnica de Madrid; Centro de Electrónica Industrial (CEI)（马德里理工大学; 工业电子中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对非对称电网下并网逆变器黑箱模型缺失的问题，提出序域新型结构建模方法，经三相逆变器不对称电压暂降实验验证模型有效。
AI 中文摘要
电力电子转换器被视为现代配电系统的关键支撑技术，并网三相逆变器广泛应用于智能电网、微电网及标准电网，具备可控性与动态解耦能力，是可再生能源、储能系统接入及FACTS等专业应用的基础。然而，基于电力电子的系统可能出现动态相互作用，引发电能质量问题。尽管各元件的电气模型对系统级分析至关重要，但这类模型往往难以获取。黑箱建模策略可用于获取商用电子转换器的行为模型，多数此类策略聚焦于DC-DC电子转换器，部分研究通过dq框架将相关概念扩展至三相转换器，但均假设电网处于对称平衡工况。本研究提出一种序域下的新型结构，用于表征非对称工况下并网商用转换器的动态行为。研究对一台三相逆变器开展实验测试以辨识其黑箱模型，并在不对称电压暂降工况下验证了该模型的性能。
英文摘要
Power electronic converters are envisaged to be key enablers of modern electric power distribution systems. Grid-connected three-phase inverters are widely used in Smart Grids and microgrids, but also in standard grids. They provide controllability and dynamic decoupling capabilities, which are fundamental in the integration of renewable sources and storage systems and in specialized applications such as FACTS. Nevertheless, power electronics-based systems can exhibit dynamic interactions, which may lead to power quality issues. Although the electrical model of each element of these systems is important for their system-level analysis, they are rarely available. Blackbox modeling strategies are useful for obtaining behavioral models of commercial electronic converters. Most blackbox modeling strategies are focused on dc-dc electronic converters; however, some works have extended these concepts to three-phase converters by means of the dq framework, under the assumption of symmetrical and balanced conditions. This work proposes a new structure in the sequence domain to represent the dynamic behavior of grid-connected commercial converters in asymmetrical conditions. Experimental tests have been performed on a three-phase inverter to identify its blackbox model and its performance has been validated during an asymmetric voltage sag.
Comments11 pages, 14 figures, IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 38, NO. 10, OCTOBER 2023
