基于高频纹波电流视角的固态变压器混合直流链路寿命延长与ESR监测集成设计

Hybrid dc-link capacitors serve a critical role in cascaded two-stage systems, such as the solid-state transformer (SST) units being developed for medium-voltage utility grids. The capacitors need to absorb ripple current in a wide spectrum, which induces aging stresses. This article presents a technique to combine lifetime extension in design with condition monitoring (CM). It is found that the e...