The electrical power distribution system (EPDS) of the more electric aircraft (MEA) is a fundamental component that needs to be efficient and resilient. The commonly considered architectures feature separate buses to achieve separation between different subsections of the EPDS. Although effective, this implies an over design, since all subsections are sized for the local worst case scenarios. In the MEA concept, multiport converters could connect the whole EPDS while guaranteeing the galvanic isolation between buses. Since multiport converters would give rise to a completely different EPDS topology, dominated by power electronics interfaces, the stability of such a system must be assessed. This article investigates the input impedance of multiple active bridge (MAB) converters when interfaced with a single dc bus and multiple resistive loads. A transfer function-based input impedance model of the MAB converter is proposed. To validate the proposed input impedance model, the verification of input impedances of a triple active bridge (TAB) converter and a quadruple active bridge (QAB) converter is carried out using both simulation and experimental results.

中文翻译：

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多有源桥变换器的广义输入阻抗模型


电动飞机 (MEA) 的配电系统 (EPDS) 是一个基本组件，需要高效且有弹性。通常考虑的架构具有独立的总线，以实现 EPDS 不同部分之间的分离。虽然有效，但这意味着过度设计，因为所有分段的大小都是针对当地最坏情况的。在MEA概念中，多端口转换器可以连接整个EPDS，同时保证总线之间的电流隔离。由于多端口转换器会产生完全不同的 EPDS 拓扑（以电力电子接口为主），因此必须评估此类系统的稳定性。本文研究了多个有源桥 (MAB) 转换器在与单个直流总线和多个电阻负载连接时的输入阻抗。提出了一种基于传递函数的 MAB 转换器输入阻抗模型。为了验证所提出的输入阻抗模型，利用仿真和实验结果对三重有源桥（TAB）转换器和四重有源桥（QAB）转换器的输入阻抗进行了验证。