Automated Frequency-Domain Small-Signal Stability Analysis of Electrical Energy Hubs

Energy hubs will be crucial infrastructures in future power systems, enhancing renewable energy integration and flexibility. However, their stability analysis is demanding as they incorporate many converters supplied by multiple vendors, for which only black-box models are available. We address this challenge by introducing the first openly available frequency-domain stability analysis tool based on Electromagnetic Transients (EMT) software models. An efficient and reliable frequency-domain identification procedure is presented and validated, which enables the application of state-of-the-art multi-terminal stability assessment methods. The capabilities of frequency-domain methods to provide valuable stability insights are demonstrated for the novel case study of a multi-terminal hybrid energy hub, thus paving the way for their safe deployment into modern power systems.